oSIST prEN IEC 60143-4:2023
(Main)Series capacitors for power systems - Part 4: Thyristor controlled series capacitors
Series capacitors for power systems - Part 4: Thyristor controlled series capacitors
Reihenkondensatoren für Starkstromanlagen - Teil 4: Thyristorgesteuerte Reihenkondensatoren
Condensateurs série destinés à être installés sur des réseaux - Partie 4: Condensateurs série commandés par thyristors
Zaporedni kondenzatorji za elektroenergetske sisteme - 4. del: Zaporedni kondenzatorji s tiristorskim upravljanjem
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 60143-4:2022
01-februar-2022
Zaporedni kondenzatorji za elektroenergetske sisteme - 4. del: Zaporedni
kondenzatorji s tiristorskim upravljanjem
Series capacitors for power systems - Part 4: Thyristor controlled series capacitors
Reihenkondensatoren für Starkstromanlagen - Teil 4: Thyristorgesteuerte
Reihenkondensatoren
Condensateurs série destinés à être installés sur des réseaux - Partie 4: Condensateurs
série commandés par thyristors
Ta slovenski standard je istoveten z: prEN IEC 60143-4:2021
ICS:
29.240.99 Druga oprema v zvezi z Other equipment related to
omrežji za prenos in power transmission and
distribucijo električne energije distribution networks
31.060.70 Močnostni kondenzatorji Power capacitors
oSIST prEN IEC 60143-4:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN IEC 60143-4:2022
---------------------- Page: 2 ----------------------
oSIST prEN IEC 60143-4:2022
33/666/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60143-4 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2021-11-26 2022-02-18
SUPERSEDES DOCUMENTS:
33/652/CD, 33/655A/CC
IEC TC 33 : POWER CAPACITORS AND THEIR APPLICATIONS
SECRETARIAT: SECRETARY:
Italy Mr Stefano Zunino
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
SC 22F
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
TITLE:
Series capacitors for power systems - Part 4: Thyristor controlled series capacitors
PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
Copyright © 2021 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it,
for any other purpose without permission in writing from IEC.
---------------------- Page: 3 ----------------------
oSIST prEN IEC 60143-4:2022
---------------------- Page: 4 ----------------------
oSIST prEN IEC 60143-4:2022
33/666/CDV – 2 – IEC CDV 60143-4 ED 2.0 © IEC:2021
1 CONTENTS
2 FOREWORD . 4
3 1 Scope . 6
4 2 Normative references . 6
5 3 Terms, definitions and abbreviations . 7
6 3.1 Abbreviations . 7
7 3.2 Terms and definitions . 7
8 4 Operating and rating considerations . 11
9 4.1 General . 11
10 4.2 TCSC characteristics . 14
11 4.3 Operating range . 15
12 4.4 Reactive power rating . 16
13 4.5 Power oscillation damping (POD) . 16
14 4.6 SSR mitigation . 16
15 4.7 Harmonics . 17
16 4.8 Control interactions between TCSCs in parallel lines . 17
17 4.9 Operating range, overvoltages and duty cycles . 17
18 4.9.1 Operating range . 17
19 4.9.2 Transient overvoltages . 17
20 4.9.3 Duty cycles . 17
21 5 Valve control . 18
22 5.1 Triggering system . 18
23 5.2 System aspects . 19
24 5.3 Normal operating conditions . 19
25 5.4 Valve firing during system faults . 20
26 5.5 Actions at low line current . 20
27 5.6 Monitoring . 20
28 6 Ratings . 20
29 6.1 Capacitor rating . 20
30 6.2 Reactor rating . 21
31 6.3 Thyristor valve rating . 21
32 6.3.1 Current capability . 21
33 6.3.2 Voltage capability . 22
34 6.4 Varistor rating . 24
35 6.5 Insulation level and creepage distance . 24
36 7 Tests . 24
37 7.1 Test of the capacitor . 25
38 7.1.1 Routine tests . 25
39 7.1.2 Type tests . 25
40 7.1.3 Special test (endurance test) . 26
41 7.2 Tests of the TCSC reactor . 26
42 7.2.1 Routine tests . 26
43 7.2.2 Type tests . 26
44 7.2.3 Special tests . 26
45 7.3 Tests of thyristor valves . 27
46 7.3.1 Routine tests . 27
47 7.3.2 Type tests . 27
---------------------- Page: 5 ----------------------
oSIST prEN IEC 60143-4:2022
IEC CDV 60143-4 ED 2.0 © IEC:2021 – 3 – 33/666/CDV
48 7.4 Tests of protection and control system . 27
49 7.4.1 Routine tests . 28
50 7.4.2 Type tests . 28
51 7.4.3 Special tests . 29
52 8 Guidance for selection of rating and operation . 29
53 8.1 General . 29
54 8.2 Thyristor controlled series capacitor . 31
55 8.2.1 AC transmission system . 31
56 8.2.2 TCSC operational objectives . 31
57 8.2.3 TCSC ratings . 32
58 8.3 Thyristor valves . 33
59 8.4 Capacitors and reactors . 33
60 8.4.1 Capacitor considerations . 34
61 8.4.2 Reactor considerations . 34
62 8.5 Fault duty cycles for varistor rating . 34
63 8.6 Valve cooling system . 35
64 8.7 TCSC control and protection . 36
65 8.7.1 Control . 36
66 8.7.2 Protection . 38
67 8.7.3 Monitoring and recording . 39
68 8.8 Precommissioning and commissioning tests . 39
69 8.8.1 Introduction . 39
70 8.8.2 Precommissioning tests . 40
71 8.8.3 Station tests . 40
72 8.8.4 Commissioning (field) tests . 40
73 Bibliography . 42
74
75 Figure 1 – Typical nomenclature of a TCSC installation . 12
76 Figure 2 – TCSC subsegment . 13
77 Figure 3 – TCSC steady state waveforms for control angle α and conduction interval σ . 14
78 Figure 4 – TCSC power frequency steady state reactance characteristics according to
79 Equation (1) with λ = 2,5 . 15
80 Figure 5 – Example of TCSC operating range for POD (left) and SSR mitigation (right) . 15
81 Figure 6 – Valve base electronics (VBE) . 18
82 Figure 7 – Valve electronics (VE) . 19
83 Figure 8 – Thyristor valve voltage in a TCSC . 23
84 Figure 9 – Typical block diagram of a real time TCSC protection- and control system
85 simulation environment . 29
86 Figure 10 – Example of operating range diagram for TCSC . 32
87
88 Table 1 – Peak and RMS voltage relationships . 13
89 Table 2 – Typical external fault duty cycle with unsuccessful high speed auto-reclosing . 34
90 Table 3 – Typical duty cycle for internal fault with successful high speed auto-reclosing . 34
91 Table 4 – Typical duty cycle for internal fault with unsuccessful high speed auto-
92 reclosing . 35
93
94
---------------------- Page: 6 ----------------------
oSIST prEN IEC 60143-4:2022
33/666/CDV – 4 – IEC CDV 60143-4 ED 2.0 © IEC:2021
95 INTERNATIONAL ELECTROTECHNICAL COMMISSION
96 ____________
97
98 SERIES CAPACITORS FOR POWER SYSTEMS –
99
100 Part 4: Thyristor controlled series capacitors
101
102
103 FOREWORD
104 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardiza tion comprising
105 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
106 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
107 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
108 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
109 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
110 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
111 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
112 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
113 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an inter national
114 consensus of opinion on the relevant subjects since each technical committee has representation from all
115 interested IEC National Committees.
116 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
117 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
118 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
119 misinterpretation by any end user.
120 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
121 transparently to the maximum extent possible in their national and regional publications. Any divergence between
122 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
123 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
124 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
125 services carried out by independent certification bodies.
126 6) All users should ensure that they have the latest edition of this publication.
127 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
128 members of its technical committees and IEC National Committees for any personal injury, property damage or
129 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees ) and
130 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
131 Publications.
132 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
133 indispensable for the correct application of this publication.
134 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
135 rights. IEC shall not be held responsible for identifying any or all such patent rights.
136 International Standard IEC 60143-4 has been prepared by IEC technical committee 33: Power
137 capacitors and their applications.
138 This part of IEC 60143 is to be used in conjunction with the following standards:
139 – IEC 60143-1:2015, Series capacitors for power systems – Part 1: General
140 – IEC 60143-2:2012, Series capacitors for power systems – Part 2: Protective equipment for
141 series capacitor banks
142 – IEC 60143-3:2015, Series capacitors for power systems – Part 3: Internal fuses
143
---------------------- Page: 7 ----------------------
oSIST prEN IEC 60143-4:2022
IEC CDV 60143-4 ED 2.0 © IEC:2021 – 5 – 33/666/CDV
144 This draft was written based on the current standard IEC 60143-4 ED 1.0; changes compared
145 with the aforesaid document are highlighted in red. Further changes compared to 33/652/CD
146 are highlighted in light blue.
147 A list of all parts of IEC 60143 series, under the general title Series capacitors for power
148 systems can be found on the iec website.
149 NOTE This standard contains excerpts reproduced from IEEE Std 1534-2002. IEEE Std 1534-2002 IEEE
150 Recommended Practice for Specifying Thyristor-Controlled Series Capacitors. Reprinted with permission from IEEE,
151 3 Park Avenue, New York, NY 10016-5997 USA, Copyright 2002 IEEE.
152 The committee has decided that the contents of this publication will remain unchanged until the
153 stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
154 the specific publication. At this date, the publication will be
155 • reconfirmed,
156 • withdrawn,
157 • replaced by a revised edition, or
158 • amended.
159
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.
160
161
162
---------------------- Page: 8 ----------------------
oSIST prEN IEC 60143-4:2022
33/666/CDV – 6 – IEC CDV 60143-4 ED 2.0 © IEC:2021
163 SERIES CAPACITORS FOR POWER SYSTEMS –
164
165 Part 4: Thyristor controlled series capacitors
166
167
168
169 1 Scope
170 This part of IEC 60143 specifies testing of thyristor controlled series capacitor (TCSC)
171 installations used in series with transmission lines. This standard also addresses issues that
172 consider ratings for TCSC thyristor valve assemblies, capacitors, and reactors as well as TCSC
173 control characteristics, protective features, cooling system and system operation.
174 2 Normative references
175 The following referenced documents are indispensable for the application of th is document. For
176 dated references, only the edition cited applies. For undated references, the latest edition of
177 the referenced document (including any amendments) applies.
178 NOTE If there is a conflict between this part of IEC 60143 and a standard listed below in Clause 2, this standard
179 prevails.
180 IEC 60050-436, International Electrotechnical Vocabulary – Chapter 436: Power capacitors
181 IEC 60060-1, High-voltage test techniques – Part 1: General definitions and test requirements
182 IEC 60068-1, Environmental Testing – Part 1: General and guidance
183 IEC 60068-2-2, Basic environmental testing procedures – Part 2-2: Tests – Tests B: Dry heat
184 IEC 60068-2-78, Basic environmental testing procedures – Part 2-78: Tests – Tests C: Damp
185 heat, steady state
186 IEC 60071-1, Insulation co-ordination – Part 1: Definitions, principles and rules
187 IEC 60071-2, Insulation co-ordination – Part 2: Application guide
188 IEC 60076-1, Power transformers – Part 1: General
189 IEC 60076-6:2007, Power transformers – Part 6: Reactors
190 IEC 60143-1:2015, Series capacitors for power systems – Part 1: General
191 IEC 60143-2:2012, Series capacitors for power systems – Part 2: Protective equipment for
192 series capacitor banks
193 IEC 60143-3:2015, Series capacitors for power systems – Part 3: Internal fuses
194 IEC 60255-5, Electrical relays – Part 5: Insulation coordination for measuring relays and
195 protection equipment – Requirements and tests
196 IEC 60255-21 (all parts), Electrical relays – Vibration, shock, bump and seismic tests on
197 measuring relays and protection equipment
---------------------- Page: 9 ----------------------
oSIST prEN IEC 60143-4:2022
IEC CDV 60143-4 ED 2.0 © IEC:2021 – 7 – 33/666/CDV
198 IEC 61000-4-29, Electromagnetic compatibility (EMC) – Part 4-29: Testing and measurement
199 techniques – Voltage dips, short interruptions and voltage variations on d.c. input port immunity
200 tests
201 IEC 62823:2015, Thyristor valves for thyristor controlled series capacitors (TCSC) – Electrical
202 testing
203 NOTE Additional useful references, not explicitly referenced in the text, are listed in the Bibliography.
204 3 Terms, definitions and abbreviations
205 For the purposes of this document, the following terms, definitions and abbreviations as well as
206 those given in IEC 60143-1, IEC 60143-2, IEC 60143-3 and some taken from IEC 60050-436
207 apply.
208 NOTE In some instances, the IEC definitions may be either too broad or too restrictive. In such a case, an additional
209 definition or note has been included.
210 3.1 Abbreviations
ETT Electrically triggered thyristors
FACTS Flexible ac transmission systems
FSC Fixed series compensation
LTT Light-triggered thyristors
MC Master control
MTBF Mean time between failure
MTTR Mean time to repair
POD Power oscillation damping
RAM Reliability, availability, and maintainability
RIV Radio influence voltage
RTU Remote terminal unit
SCADA Supervisory control and data acquisition
ER Events recorder
FR Fault recorder
RTDS Real time digital simulation
SSR Sub synchronous resonance
SVC Static var compensator
TCR Thyristor-controlled reactor
RMS Root-mean-square
BLK Blocked (mode of operation)
BP Bypass (mode of operation)
CAP Capacitive boost (mode of operation)
HMI Human Machine Interface
211
212 3.2 Terms and definitions
213 3.2.1
214 thyristor valve
215 electrically combined assembly of thyristor levels, complete with all connections, auxiliary
216 components and mechanical structures, which can be connected in series with each phase of
217 the reactor or capacitor of a TCSC
---------------------- Page: 10 ----------------------
oSIST prEN IEC 60143-4:2022
33/666/CDV – 8 – IEC CDV 60143-4 ED 2.0 © IEC:2021
218 3.2.2
219 bypass current
220 the current flowing through the bypass switch, protective device, thyristor valve, or other
221 devices, in parallel with the series capacitor, when the series capacitor is bypassed
222 3.2.3
223 capacitive range
224 TCSC operation resulting in an effective increase of the power frequency reactance of the series
225 capacitor (See Figure 5)
226 3.2.4
227 temporary overload
228 short duration (typically 30 min) overload capability of the TCSC at rated frequency and ambient
229 temperature range
230 3.2.5
231 dynamic overload
232 short duration (typically 10 s) overload capability of the TCSC at rated frequency and ambient
233 temperature range. (See Figure 5 and Figure 10)
234 3.2.6
235 platform-to-ground cooling/air-handling insulator
236 an insulator that encloses cooling/air handling paths between platform and ground level
237 3.2.7
238 thyristor-controlled series capacitor bank
239 TCSC
240 an assembly of thyristor valves, TCSC reactor(s), capacitors, and associated auxiliaries, such
241 as structures, support insulators, switches, and protective devices, with control equipment
242 required for a complete operating installation
243 3.2.8
244 valve electronics
245 VE
246 electronic circuits at valve potential(s) that perform control functions
247 3.2.9
248 TCSC reactor
249 one or more reactors connected in series with the thyristor valve (see NOTE This figure contains material
250 reproduced from IEEE Std 1534-2002. IEEE Std 1534-2002 IEEE Recommended Practice for Specifying Thyristor-
251 Controlled Series Capacitors, Copyright 2002 IEEE. All rights reserved.
252 Figure 1, item 12)
253 3.2.10
254 valve varistor
255 an assembly of varistor units that limit overvoltages to a given value. In the context of TCSCs,
256 the valve varistor is typically defined by its ability to limit the voltage across a thyristor valve to
257 a specified protective level while absorbing energy. The valve varistor is designed to withstand
258 the temporary overvoltages and continuous operating voltage across the thyristor valve
259 3.2.11
260 valve blocking
261 an operation to prevent further firing of a thyristor valve by inhibiting triggering
262 3.2.12
263 valve deblocking
264 an operation to permit firing of a thyristor valve by removing valve blocking action
---------------------- Page: 11 ----------------------
oSIST prEN IEC 60143-4:2022
IEC CDV 60143-4 ED 2.0 © IEC:2021 – 9 – 33/666/CDV
265 3.2.13
266 valve base electronics
267 VBE
268 an electronic unit, at earth potential, which is the interface between the control system of the
269 TCSC and the thyristor valves
270 3.2.14
271 capacitor current
272 I
C
273 current through the series capacitor (see Figure 2)
274 3.2.15
275 line current
276 I
L
277 power frequency line current (see Figure 2)
278 3.2.16
279 rated current
280 I
N
281 the RMS line current (I ) at which the TCSC should be capable of continuous operation with
L
282 rated reactance (X ) and rated voltage (U )
N N
283 3.2.17
284 valve current
285 I
V
286 current through the thyristor valve (see Figure 2)
287 3.2.18
288 capacitor voltage
289 U
C
290 voltage across the TCSC (see Figure 2)
291 3.2.19
292 protective level
293 U
PL
294 magnitude of the maximum peak of the power frequency voltage appearing across the
295 overvoltage protector during a power system fault
296 NOTE The protective level may be expressed in terms of the actual peak voltage across a segment or in terms of
297 the per unit of the peak of the rated voltage across the capacitor.
298 3.2.20
299 rated TCSC voltage
300 U
N
301 the power frequency voltage across each phase of the TCSC that can be continuously controlled
302 at nominal reactance (X ), rated current (I ), frequency, and reference ambient temperature
N N
303 range
304 3.2.21
305 apparent reactance
306 X(α)
307 TCSC apparent power frequency reactance as a function of thyristor control angle ( α) (see
308 Figure 4)
---------------------- Page: 12 ----------------------
oSIST prEN IEC 60143-4:2022
33/666/CDV – 10 – IEC CDV 60143-4 ED 2.0 © IEC:2021
309 3.2.22
310 rated frequency
311 f
N
312 frequency of the system in which the TCSC is intended to be used
313 3.2.23
314 rated capacitance
315 C
N
316 capacitance value for which the TCSC capacitor has been designed
317 3.2.24
318 physical reactance
319 X
C
320 the power frequency reactance for each phase of the TCSC bank with thyristors blocked and a
321 capacitor internal dielectric temperature of 20 ˚C; X = 1(2πf C )
C N N
322 3.2.25
323 boostfactor
324 k
B
325 the ratio of X(α) divided by X ; k = X(α) / X
C B C
326 3.2.26
327 nominal reactance
328 X
N
329 the nominal power frequency reactance for each phase of the TCSC with rated line I and
N
330 nominal boost factor
331 3.2.27
332 conduction interval
333 σ
334 that part of a cycle during which a thyristor valve is in the conducting state, σ = 2β (see Figure
335 3)
336 3.2.28
337 control angle
338 α
339 the time expressed in electrical angular measure from the capacitor voltage (U ) zero crossing
C
340 to the starting of current conduction through the thyristor valve. (see Figure 3)
341 3.2.29
342 internal fault
343 an internal fault is a line fault occurring within the protected line section containing the series
344 capacitor bank
345 3.2.30
346 external fault
347 an external fault is a line fault occurring outside the protected line section containing the series
348 capacitor bank
349
----------------
...
SLOVENSKI STANDARD
oSIST prEN IEC 60143-4:2023
01-maj-2023
Zaporedni kondenzatorji za elektroenergetske sisteme - 4. del: Zaporedni
kondenzatorji s tiristorskim upravljanjem
Series capacitors for power systems - Part 4: Thyristor controlled series capacitors
Reihenkondensatoren für Starkstromanlagen - Teil 4: Thyristorgesteuerte
Reihenkondensatoren
Condensateurs série destinés à être installés sur des réseaux - Partie 4: Condensateurs
série commandés par thyristors
Ta slovenski standard je istoveten z: prEN IEC 60143-4:2023
ICS:
29.240.99 Druga oprema v zvezi z Other equipment related to
omrežji za prenos in power transmission and
distribucijo električne energije distribution networks
31.060.70 Močnostni kondenzatorji Power capacitors
oSIST prEN IEC 60143-4:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN IEC 60143-4:2023
---------------------- Page: 2 ----------------------
oSIST prEN IEC 60143-4:2023
33/689/CDV
PROJET DE COMITÉ POUR VOTE (CDV)
NUMÉRO DE PROJET:
IEC 60143-4 ED2
DATE DE DIFFUSION: DATE DE CLÔTURE DU VOTE:
2023-03-31 2023-05-26
REMPLACE LES DOCUMENTS:
33/666/CDV, 33/672/RVC
IEC TC 33 : CONDENSATEURS DE PUISSANCE ET LEURS APPLICATIONS
SECRÉTARIAT: SECRÉTAIRE:
Italy Mr Stefano Zunino
INTÉRESSE ÉGALEMENT LES COMITÉS SUIVANTS: NORME HORIZONTALE SUGGÉRÉE:
SC 22F
Il est demandé aux autres TC/SC de faire part, le cas échéant, de leur
intérêt pour ce CDV au secrétaire
FONCTIONS CONCERNÉES:
ASSURANCE DE LA QUALITÉ CEM ENVIRONNEMENT SÉCURITÉ
SOUMIS AU VOTE PARALLÈLE AU CENELEC NON SOUMIS AU VOTE PARALLÈLE AU CENELEC
Attention vote parallèle IEC-CENELEC
L’attention des Comités nationaux de l’IEC, membres du
CENELEC, est attirée sur le fait que ce projet de comité
pour vote (CDV) est soumis au vote parallèle.
Les membres du CENELEC sont invités à voter via le
système de vote en ligne du CENELEC.
Ce document est toujours à l'étude et susceptible de modification. Il ne peut servir de référence.
Les destinataires du présent document sont invités à présenter, avec leurs observations, la notification des droits de propri été
dont ils auraient éventuellement connaissance et à fournir une documentation explicative.
TITRE:
Condensateurs série destinés à être installés sur des réseaux - Partie 4: Condensateurs série commandés
par thyristors
DATE DE STABILITÉ PROPOSÉE: 2025
NOTE DES RESPONSABLES DU TC/SC:
This is an updated version of 33/666/CDV, where references to IEEE Std 1534-2002 have been removed to avoid
copyright issues.
Since this is a second CDV it will be ciruclated for 8 weeks.
Droits de reproduction © 2023 Commission Electrotechnique Internationale, IEC. Tous droits de reproduction réservés. Ce
fichier électronique peut être téléchargé, copié et imprimé uniquement dans le but de préparer les positions des Comités
Nationaux. Il n’est pas autorisé de copier ou de mettre en ligne ce fichier ou une version imprimée du document, ou tout extr ait
de celui-ci, à d'autres fins sans l’accord écrit de l’IEC.
---------------------- Page: 3 ----------------------
oSIST prEN IEC 60143-4:2023
---------------------- Page: 4 ----------------------
oSIST prEN IEC 60143-4:2023
33/689/CDV – 2 – IEC 60143-4:2022 © IEC 2023
1 CONTENTS
2
3 FOREWORD . 5
4 1 Scope . 7
5 2 Normative references . 7
6 3 Terms, definitions and abbreviated terms . 8
7 3.1 Terms and definitions . 8
8 3.2 Abbreviated terms . 12
9 4 Operating and rating considerations . 13
10 4.1 General . 13
11 4.2 TCSC characteristics . 17
12 4.3 Operating range . 17
13 4.4 Reactive power rating . 18
14 4.5 Power oscillation damping (POD) . 18
15 4.6 SSR mitigation . 19
16 4.7 Harmonics . 19
17 4.8 Control interactions between TCSCs in parallel lines . 19
18 4.9 Operating range, overvoltages and duty cycles . 20
19 4.9.1 Operating range . 20
20 4.9.2 Transient overvoltages . 20
21 4.9.3 Duty cycles . 20
22 5 Valve control . 20
23 5.1 Triggering system . 20
24 5.2 System aspects . 21
25 5.3 Normal operating conditions . 22
26 5.4 Valve firing during system faults . 22
27 5.5 Actions at low line current . 22
28 5.6 Monitoring . 22
29 6 Ratings . 23
30 6.1 General . 23
31 6.2 Capacitor rating . 23
32 6.3 Reactor rating . 23
33 6.4 Thyristor valve rating . 23
34 6.4.1 General . 23
35 6.4.2 Current capability . 23
36 6.4.3 Voltage capability . 24
37 6.5 Varistor rating . 26
38 6.6 Insulation level and creepage distance. 26
39 7 Tests . 27
40 7.1 General . 27
41 7.2 Test of the capacitor . 27
42 7.2.1 General . 27
43 7.2.2 Routine tests . 27
44 7.2.3 Type tests . 28
45 7.2.4 Special test (ageing test) . 28
46 7.3 Tests of the TCSC reactor . 28
---------------------- Page: 5 ----------------------
oSIST prEN IEC 60143-4:2023
IEC 60143-4:2022 © IEC 2023 – 3 –
47 7.3.1 General . 28
48 7.3.2 Routine tests . 28
49 7.3.3 Type tests . 28
50 7.3.4 Special tests . 29
51 7.4 Tests of thyristor valves . 29
52 7.4.1 Routine tests . 29
53 7.4.2 Type tests . 29
54 7.5 Tests of protection and control system . 30
55 7.5.1 General . 30
56 7.5.2 Routine tests . 30
57 7.5.3 Type tests . 31
58 7.5.4 Special tests − Hardware-in-the-loop (HIL) tests . 31
59 8 Guidance for selection of rating and operation . 32
60 8.1 General . 32
61 8.2 Thyristor controlled series capacitor . 33
62 8.2.1 AC transmission system . 33
63 8.2.2 TCSC operational objectives . 33
64 8.2.3 TCSC ratings . 34
65 8.3 Thyristor valves . 35
66 8.4 Capacitors and reactors . 35
67 8.4.1 General . 35
68 8.4.2 Capacitor considerations . 35
69 8.4.3 Reactor considerations . 35
70 8.5 Fault duty cycles for varistor rating . 36
71 8.6 Valve cooling system . 37
72 8.7 TCSC control and protection . 37
73 8.7.1 General . 37
74 8.7.2 Control . 38
75 8.7.3 Protection . 40
76 8.7.4 Monitoring and recording . 40
77 8.8 Precommissioning and commissioning tests . 41
78 8.8.1 General . 41
79 8.8.2 Pre-commissioning tests . 41
80 8.8.3 Station tests . 42
81 Bibliography . 44
82
83 Figure 1 – Typical nomenclature of a TCSC installation . 14
84 Figure 2 – TCSC subsegment . 15
85 Figure 3 – TCSC steady state waveforms for control angle α and conduction interval σ . 16
86 Figure 4 – TCSC power frequency steady state reactance characteristics according to
87 Equation (1), with λ = 2,5 . 17
88 Figure 5 – Example of TCSC operating range for POD (left) and SSR mitigation (right) . 18
89 Figure 6 – Valve base electronics (VBE) . 21
90 Figure 7 – Valve electronics (VE) . 21
91 Figure 8 – Thyristor valve voltage in a TCSC . 25
92 Figure 9 – Typical block diagram of a real time TCSC protection- and control system
93 simulation environment . 31
94 Figure 10 – Example of operating range diagram for TCSC . 34
---------------------- Page: 6 ----------------------
oSIST prEN IEC 60143-4:2023
33/689/CDV – 4 – IEC 60143-4:2022 © IEC 2023
95
96 Table 1 – Peak and RMS voltage relationships . 16
97 Table 2 – Typical external fault duty cycle with unsuccessful high speed auto-reclosing . 36
98 Table 3 – Typical duty cycle for internal fault with successful high speed auto-reclosing . 36
99 Table 4 – Typical duty cycle for internal fault with unsuccessful high speed auto-
100 reclosing . 37
101
102
---------------------- Page: 7 ----------------------
oSIST prEN IEC 60143-4:2023
IEC 60143-4:2022 © IEC 2023 – 5 –
103 INTERNATIONAL ELECTROTECHNICAL COMMISSION
104 ____________
105
106 SERIES CAPACITORS FOR POWER SYSTEMS –
107
108 Part 4: Thyristor controlled series capacitors
109
110 FOREWORD
111 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
112 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
113 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
114 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
115 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
116 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
117 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
118 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
119 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
120 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
121 consensus of opinion on the relevant subjects since each technical committee has representation from all
122 interested IEC National Committees.
123 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
124 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
125 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
126 misinterpretation by any end user.
127 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
128 transparently to the maximum extent possible in their national and regional publications. Any divergence between
129 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
130 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
131 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
132 services carried out by independent certification bodies.
133 6) All users should ensure that they have the latest edition of this publication.
134 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
135 members of its technical committees and IEC National Committees for any personal inju ry, property damage or
136 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
137 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
138 Publications.
139 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
140 indispensable for the correct application of this publication.
141 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
142 rights. IEC shall not be held responsible for identifying any or all such patent rights.
143 IEC 60143-4 has been prepared by IEC technical committee 33: Power capacitors and their
144 applications. It is an International Standard.
145 This second edition cancels and replaces the first edition published in 2010. This edition
146 constitutes a technical revision.
147 This edition includes the following significant technical changes with respect to the previous
148 edition:
149 a) Thyristor valve testing requirements refer to IEC 62823.
150 b) Equation 1 in paragraph 4.2 corrected.
151 c) Hardware-in-the-loop (HIL) Tests, paragraph 7.4.3 replaces previously specified real time
152 protection and control system test with network simulator.
---------------------- Page: 8 ----------------------
oSIST prEN IEC 60143-4:2023
33/689/CDV – 6 – IEC 60143-4:2022 © IEC 2023
153 The text of this International Standard is based on the following documents:
Draft Report on voting
33/XX/FDIS 33/XX/RVD
154
155 Full information on the voting for its approval can be found in the report on voting indicated in
156 the above table.
157 The language used for the development of this International Standard is English.
158 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
159 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
160 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
161 described in greater detail at www.iec.ch/standardsdev/publications.
162 This part of IEC 60143 is to be used in conjunction with the following standards:
163 – IEC 60143-1:2015, Series capacitors for power systems – Part 1: General
164 – IEC 60143-2:2012, Series capacitors for power systems – Part 2: Protective equipment for
165 series capacitor banks
166 – IEC 60143-3:2015, Series capacitors for power systems – Part 3: Internal fuses
167 This draft was written based on the current standard IEC 60143-4 ED 1.0; changes compared
168 with the aforesaid document are highlighted in red.
169 A list of all parts of IEC 60143 series, under the general title Series capacitors for power
170 systems can be found on the iec website.
171 The committee has decided that the contents of this document will remain unchanged until the
172 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
173 specific document. At this date, the document will be
174 • reconfirmed,
175 • withdrawn,
176 • replaced by a revised edition, or
177 • amended.
178
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
179
180
---------------------- Page: 9 ----------------------
oSIST prEN IEC 60143-4:2023
IEC 60143-4:2022 © IEC 2023 – 7 –
181 SERIES CAPACITORS FOR POWER SYSTEMS –
182
183 Part 4: Thyristor controlled series capacitors
184
185
186
187 1 Scope
188 This part of IEC 60143 specifies testing of thyristor controlled series capacitor (TCSC)
189 installations used in series with transmission lines. This document also addresses issues that
190 consider ratings for TCSC thyristor valve assemblies, capacitors, and reactors as well as TCSC
191 control characteristics, protective features, cooling system and system operation.
192 2 Normative references
193 The following documents are referred to in the text in such a way that some or all of their content
194 constitutes requirements of this document. For dated references, only the edition cited applies.
195 For undated references, the latest edition of the referenced document (including any
196 amendments) applies.
197 NOTE If there is a conflict between this part of IEC 60143 and a standard listed below in Clause 2, this document
198 prevails.
199 IEC 60050-436, International Electrotechnical Vocabulary (IEV) – Chapter 436: Power
200 capacitors
201 IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Tests B: Dry heat
202 IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state
203 IEC 60076-1, Power transformers – Part 1: General
204 IEC 60076-6:2007, Power transformers – Part 6: Reactors
205 IEC 60143-1:2015, Series capacitors for power systems – Part 1: General
206 IEC 60143-2:2012, Series capacitors for power systems – Part 2: Protective equipment for
207 series capacitor banks
208 IEC 60143-3:2015, Series capacitors for power systems – Part 3: Internal fuses
209 IEC 60255-27, Electrical relays – Part 5: Insulation coordination for measuring relays and
210 protection equipment – Requirements and tests
211 IEC 60255-21 (all parts), Electrical relays – Vibration, shock, bump and seismic tests on
212 measuring relays and protection equipment
213 IEC 61000‑4 (all parts), Electromagnetic compatibility (EMC) − Part 4: Testing and
214 measurement techniques
215 IEC 61000‑4‑11, Electromagnetic compatibility (EMC) − Part 4-11: Testing and measurement
216 techniques − Voltage dips, short interruptions and voltage variations immunity tests for
217 equipment with input current up to 16 A per phase
---------------------- Page: 10 ----------------------
oSIST prEN IEC 60143-4:2023
33/689/CDV – 8 – IEC 60143-4:2022 © IEC 2023
218 IEC 61000-4-29, Electromagnetic compatibility (EMC) – Part 4-29: Testing and measurement
219 techniques – Voltage dips, short interruptions and voltage variations on d.c. input port immunity
220 tests
221 IEC 62823:2015, Thyristor valves for thyristor controlled series capacitors (TCSC) – Electrical
222 testing
223 IEC 62823:2015/AMD1:2019
224 NOTE Additional useful references, not explicitly referenced in the text, are listed in the Bibliography.
225 3 Terms, definitions and abbreviated terms
226 For the purposes of this document, the terms and definitions given in IEC 60143-1, IEC 60143-
227 2, IEC 60143-3, some taken from IEC 60050-436 and the following apply.
228 ISO and IEC maintain terminological databases for use in standardization at the following
229 addresses:
230 • IEC Electropedia: available at http://www.electropedia.org/
231 • ISO Online browsing platform: available at http://www.iso.org/obp
232 NOTE In some instances, the IEC definitions can be either too broad or too restrictive. In such a case, an additional
233 definition or note has been included.
234
235 3.1 Terms and definitions
236 3.1.1
237 thyristor valve
238 electrically combined assembly of thyristor levels, complete with all connections, auxiliary
239 components and mechanical structures, which can be connected in series with each phase of
240 the reactor or capacitor of a TCSC
241 3.1.2
242 bypass current
243 the current flowing through the bypass switch, protective device, thyristor valve, or other
244 devices, in parallel with the series capacitor, when the series capacitor is bypassed
245 3.1.3
246 capacitive range
247 TCSC operation resulting in an effective increase of the power frequency reactance of the series
248 capacitor (see Figure 5)
249 3.1.4
250 temporary overload
251 short duration (typically 30 min) overload capability of the TCSC at rated frequency and ambient
252 temperature range
253 3.1.5
254 dynamic overload
255 short duration (typically 10 s) overload capability of the TCSC at rated frequency and ambient
256 temperature range (see Figure 5 and Figure 10)
257 3.1.6
258 platform-to-ground cooling/air-handling insulator
259 insulator that encloses cooling/air handling paths between platform and ground level
---------------------- Page: 11 ----------------------
oSIST prEN IEC 60143-4:2023
IEC 60143-4:2022 © IEC 2023 – 9 –
260 3.1.7
261 thyristor-controlled series capacitor bank
262 TCSC
263 assembly of thyristor valves, TCSC reactor(s), capacitors, and associated auxiliaries, such as
264 structures, support insulators, switches, and protective devices, with control equipment required
265 for a complete operating installation
266 3.1.8
267 valve electronics
268 VE
269 electronic circuits at valve potential(s) that perform control functions
270 3.1.9
271 TCSC reactor
272 one or more reactors connected in series with the thyristor valve (see Figure 1, item 12)
273 3.1.10
274 valve varistor
275 assembly of varistor units that limit overvoltages to a given value
276 Note 1 to entry: In the context of TCSCs, the valve varistor is typically defined by its ability to limit the voltage
277 across a thyristor valve to a specified protective level while absorbing energy. The valve varistor is designed to
278 withstand the temporary overvoltages and continuous operating voltage across the thyristor valve.
279 3.1.11
280 valve blocking
281 operation to prevent further firing of a thyristor valve by inhibiting triggering
282 3.1.12
283 valve deblocking
284 operation to permit firing of a thyristor valve by removing valve blocking action
285 3.1.13
286 valve base electronics
287 VBE
288 electronic unit, at earth potential, which is the interface between the control system of the TCSC
289 and the thyristor valves
290 3.1.14
291 capacitor current
292 I
C
293 current through the series capacitor (see Figure 2)
294 3.1.15
295 line current
296 I
L
297 power frequency line current (see Figure 2)
298 3.1.16
299 rated current
300 I
N
301 RMS line current (I ) at which the TCSC should be capable of continuous operation with rated
L
302 reactance (X ) and rated voltage (U )
N N
303 3.1.17
304 valve current
305 I
V
306 current through the thyristor valve (see Figure 2)
---------------------- Page: 12 ----------------------
oSIST prEN IEC 60143-4:2023
33/689/CDV – 10 – IEC 60143-4:2022 © IEC 2023
307 3.1.18
308 capacitor voltage
309 U
C
310 voltage across the TCSC (see Figure 2)
311 3.1.19
312 protective level
313 U
PL
314 magnitude of the maximum peak of the power frequency voltage appearing across the
315 overvoltage protector during a power system fault
316 Note 1 to entry: The protective level may be expressed in terms of the actual peak voltage across a segment or in
317 terms of the per unit of the peak of the rated voltage across the capacitor.
318 3.1.20
319 rated TCSC voltage
320 U
N
321 power frequency voltage across each phase of the TCSC that can be continuously controlled
322 at rated reactance (X ), rated current (I ), frequency, and reference ambient temperature range
N N
323 3.1.21
324 apparent reactance
325 X(α)
326 TCSC apparent power frequency reactance as a function of thyristor control angle ( α) (see
327 Figure 4)
328 3.1.22
329 nominal frequency
330 f
N
331 frequency of the sys
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.