prEN IEC 62590-3-2:2025
(Main)Railway applications - Electronic power converters for fixed installations - Part 3-2: AC traction applications - Static frequency converter
Railway applications - Electronic power converters for fixed installations - Part 3-2: AC traction applications - Static frequency converter
Applications ferroviaires - Convertisseurs électroniques de puissance pour installations fixes - Partie 3-2: Applications de traction en courant alternatif - Convertisseur de fréquence statique
Železniške naprave - Elektronski elektroenergetski pretvornik za fiksne postroje - 3-2. del: Sistem vleke z izmenično napetostjo - Statični frekvenčni pretvornik
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2025
Železniške naprave - Elektronski elektroenergetski pretvornik za fiksne postroje -
3-2. del: Sistem vleke z izmenično napetostjo - Statični frekvenčni pretvornik
Railway applications - Electronic power converters for fixed installations - Part 3-2: AC
traction applications - Static frequency converter
Applications ferroviaires - Convertisseurs électroniques de puissance pour installations
fixes - Partie 3-2: Applications de traction en courant alternatif - Convertisseur de
fréquence statique
Ta slovenski standard je istoveten z: prEN IEC 62590-3-2:2025
ICS:
29.200 Usmerniki. Pretvorniki. Rectifiers. Convertors.
Stabilizirano električno Stabilized power supply
napajanje
29.280 Električna vlečna oprema Electric traction equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
9/3215/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62590-3-2 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-06-06 2025-08-29
SUPERSEDES DOCUMENTS:
9/3007/CD, 9/3042A/CC
IEC TC 9 : ELECTRICAL EQUIPMENT AND SYSTEMS FOR RAILWAYS
SECRETARIAT: SECRETARY:
France Mr Denis MIGLIANICO
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
ASPECTS CONCERNED:
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.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clau ses to be
included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC c lauses. (SEE
AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Railway applications – Electronic power converters for fixed installations – Part 3-2: AC Traction
applications – Static frequency converter
PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
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.
– 2 – IEC CDV 62590-3-2 © IEC 2025
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, and abbreviations . 9
3.1 Terms and definitions. 9
3.2 Abbreviations . 11
4 System configuration with SFC application . 12
4.1 General . 12
4.2 Components of an SFC . 13
5 Design and integration . 14
5.1 General . 14
5.2 Requirements to be indicated by the user . 15
5.2.1 General . 15
5.2.2 Process for ensuring network compatibility . 15
5.2.3 Specification of SFC parameters . 15
5.2.4 Interface to the electric traction power supply system . 16
5.2.5 Interface to the 3AC power network . 17
5.2.6 Specification of the simulation model . 18
5.3 To be indicated by the manufacturer . 18
5.4 Load requirements . 18
5.5 Operational behaviour of SFC . 19
5.5.1 General . 19
5.5.2 Operation modes . 20
5.5.3 Electrical behaviour at the electric traction power supply system or
railway transmission network side . 20
5.5.4 Electrical behaviour at the 3AC power network side . 22
6 Performance requirements . 22
6.1 General . 22
6.2 Losses . 22
6.3 Electromagnetic compatibility (EMC) . 23
6.4 Power Quality . 23
6.4.1 Criteria . 23
6.4.2 Harmonics . 23
6.4.3 Interference with other systems . 24
6.5 Protection functions . 24
6.6 Cooling . 24
6.7 Mechanical characteristics . 24
6.7.1 General . 24
6.7.2 Earthing . 24
6.7.3 Vibrations . 25
6.7.4 Environmental conditions . 25
6.7.5 Degree of protection . 25
6.8 Insulation coordination . 25
6.9 Rating plate . 25
IEC CDV 62590-3-2 © IEC 2025 – 3 –
7 Tests . 25
7.1 General requirements . 25
7.1.1 General . 25
7.1.2 Type test . 26
7.1.3 Routine test . 27
7.2 Test Items . 27
7.2.1 Visual inspection . 27
7.2.2 Test of accessory and auxiliary components . 27
7.2.3 Insulation test . 27
7.2.4 Functional tests . 27
7.2.5 Performance Tests . 28
7.2.6 Temperature-rise test . 28
7.2.7 Power loss determination. 28
7.2.8 Audible sound . 29
7.2.9 EMC tests . 29
7.2.10 Mechanical test . 29
Annex A (informative) Network configurations . 30
A.1 SFC connected to single-phase electric traction power supply system . 30
A.1.1 Purpose and function . 30
A.1.2 Network configurations . 30
A.2 SFC connected to railway transmission network . 34
A.2.1 Purpose and function . 34
A.2.2 Network configurations . 34
Annex B (informative) SFC control functions, examples . 38
B.1 General . 38
B.2 Additional operation modes . 38
B.3 Operation Sequences . 38
B.4 Examples of control function for the determination of steady-state set point
values . 39
B.4.1 General . 39
B.4.2 Constant voltage . 39
B.4.3 Constant reactive power or cos phi . 39
B.4.4 Constant active power . 39
B.4.5 U/I characteristic . 39
B.4.6 U/Q characteristic . 39
B.4.7 Ψ/P characteristic . 40
B.4.8 Synchronous-synchronous machine characteristic . 41
B.4.9 Transformer characteristic . 42
B.4.10 f/P characteristic . 43
B.5 Exchange of information for synchronized operation . 43
B.6 Examples of principles of closed-loop converter control . 44
Annex C (informative) Example of Reliability, Availability and Maintainability . 45
Annex D (informative) Example of simulation environment for SFC . 46
Annex E (informative) Back-to-back test . 47
Bibliography . 48
Figure 1 – Example applications of SFC in a railway transmission network and an
electric traction power supply system . 13
– 4 – IEC CDV 62590-3-2 © IEC 2025
Figure 2 – SFC components and interfaces . 14
Figure 3 – example P/Q diagram for defining the SFC operation range . 19
Figure A.1 – SFC in single source operation connected to an electric traction power
supply system . 31
Figure A.2 – Several converter substations connected to an electric traction power
supply system . 32
Figure A.3 – SFC and transformer station connected to an electric traction power
supply system . 33
Figure A.4 – SFC and rotating converter station connected to an electric traction power
supply system . 34
Figure A.5 – SFC in single source operation connected to a railway transmission
network . 35
Figure A.6 – Several converter substations connected to a railway transmission
network . 36
Figure A.7 – SFC and asynchronous converter connected to a railway transmission
network . 37
Figure B.8 – example U/Q characteristic . 40
Figure B.9 – exemplary Ψ/P characteristics . 41
Figure B.10 – example synchronous machine characteristic. 42
Figure B.11 – example f/P characteristic . 43
Figure E.12 – back-to-back test of a SFC . 47
Table 1 – List of Tests . 26
IEC CDV 62590-3-2 © IEC 2025 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RAILWAY APPLICATIONS –
ELECTRONIC POWER CONVERTERS FOR FIXED INSTALLATIONS –
Part 3-2: AC traction application –
Static frequency converters
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 62590-3-2 has been prepared by of IEC technical committee 9: electrical equipment and
systems for railways. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
9/XXXX/FDIS 9/XXXX/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
– 6 – IEC CDV 62590-3-2 © IEC 2025
at https://www.iec.ch/members_experts/refdocs. The main document types developed by IEC
are described in greater detail at https://www.iec.ch/standardsdev/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IEC CDV 62590-3-2 © IEC 2024 – 7 – 9/3042/CDV
1 INTRODUCTION
2 Static frequency converters (SFC) for traction power supply differ from other converters for
3 industrial use due to special electrical service conditions and due to the large range of load
4 variation and the peculiar characteristics of the loads.
5 Specific requirements are needed for static frequency converter in addition to the requirements
6 for converters for other industrial use.
7 Converter transformers for fixed installations of railway applications are covered by IEC 62695.
8 The series of IEC 62590 consists of the following parts:
9 IEC 62590-1 Railway applications –Electronic Power Converters for fixed installations – Part 1:
10 General requirements
11 IEC 62590-2-1 Railway applications –Electronic Power Converters for fixed installations – Part
12 2-1: DC traction applications - Uncontrolled rectifiers
13 IEC 62590-2-2 Railway applications –Electronic Power Converters for fixed installations – Part
14 2-2: DC traction applications – Controlled converters
15 IEC 62590-3-1 Railway applications –Electronic power converters for fixed installations – Part
16 3-1: AC traction applications – Electronic power compensators
17 IEC 62590-3-2 Railway applications –Electronic power converters for fixed installations – Part
18 3-2: AC traction applications – Static frequency converters
9/3042/CDV – 8 – IEC CDV 62590-3-2 © IEC 2024
20 RAILWAY APPLICATIONS –
21 ELECTRONIC POWER CONVERTERS FOR FIXED INSTALLATIONS
23 Part 3-2: AC traction application –
24 Static frequency converters
26 1 Scope
27 This document specifies characteristics, requirements, and test methods for static frequency
28 converters for AC electric traction power supply systems and railway transmission networks.
29 Static frequency converters connect a 3AC power network with an AC electric traction power
30 supply system or railway transmission network with a bidirectional load flow.
31 The main purpose of the SFC is:
32 • to establish an active power transfer between a 3AC and an AC system, where both systems
33 can operate independently or with a fixed frequency ratio
34 • to support the voltage of the 1AC system
35 • optionally to support the voltage of the 3AC system
36 • to implement various network control strategies by controlling the phase angle and
37 amplitude of both voltages
38 • to draw a balanced load from the 3AC system
39 This document applies to fixed installations of following AC electric traction power supply
40 systems:
41 • railway networks,
42 • metropolitan transport networks including metros.
43 This document does not apply to:
44 • magnetic levitated transport systems
45 2 Normative references
46 The following documents are referred to in the text in such a way that some or all their content
47 constitutes requirements of this document. For dated references, only the edition cited applies.
48 For undated references, the latest edition of the referenced document (including any
49 amendments) applies.
50 IEC 60038, IEC standard voltages
51 IEC 60071-1, Insulation co-ordination - Part 1: Definitions, principles and rules
52 IEC 60364-1, Erection of low voltage installations – Part 100: Fundamental principles,
53 assessment of general characteristics, definitions
54 IEC 60529, Degrees of protection provided by enclosures (IP Code)
55 IEC 60850, Railway applications – Supply voltages of traction systems
56 IEC 61000-1-1, Electromagnetic compatibility (EMC) – Part 1: General – Section 1: Application
57 and interpretation of fundamental definitions and terms
IEC CDV 62590-3-2 © IEC 2024 – 9 – 9/3042/CDV
58 IEC 61000-3, Electromagnetic compatibility (EMC) – Part 3: Limits
59 IEC 61936-1, Power installations exceeding 1 kV a.c. – Part 1: Common rules
60 IEC 62236-1, Railway applications - Electromagnetic compatibility - Part 1: General
61 IEC 62236-2, Railway applications - Electromagnetic compatibility - Part 2: Emission of the
62 whole railway system to the outside world / Applies in conjunction with IEC 62236-1 (2018-02)
63 IEC 62236-5, Railway applications - Electromagnetic compatibility - Part 5: Emission and
64 immunity of fixed power supply installations and apparatus / Applies in conjunction with IEC
65 62236-1 (2008-12)
66 IEC 62278, Railway applications – Specification and demonstration of reliability, availability,
67 maintainability and safety (RAMS)
68 IEC 62313, Railway applications – Power supply and rolling stock – Technical criteria for the
69 coordination between power supply (substation) and rolling stock
70 IEC 62427, Railway applications - Compatibility between rolling stock and train detection
71 systems
72 IEC 62497-1, Railway applications – Insulation coordination – Part 1: Basic requirements –
73 Clearances and creepage distance for all electrical and electronic equipment
74 IEC 62695, Railway applications – Fixed installations – Traction transformers
75 3 Terms, definitions, and abbreviations
76 3.1 Terms and definitions
77 For the purposes of this document, the terms and definitions given in IEC 62590-1 and the
78 following apply.
79 ISO and IEC maintain terminological databases for use in standardization at the following
80 addresses:
81 • IEC Electropedia: available at https://www.electropedia.org/
82 • ISO Online browsing platform: available at https://www.iso.org/obp
83 Figures and illustrations including electric circuits within this document are based on the
84 generator reference arrow system (GRAS) for defining the sign of electric power.
85 3.1.1
86 static frequency converters
87 SFC
88 electronic power converter for railway applications connecting a 3AC power network with an AC
89 traction power supply system or railway transmission network of different voltage level, phase
90 angle and/or frequency
91 Note 1 to entry: The term static is used to distinguish semiconductor converters from rotating converters.
92 Note 2 to entry: The SFC is also called static phase converter (SPC) or electronic frequency converter (EFC).
93 Note 3 to entry: An AC electric traction power supply system can also be an autotransformer system, booster
94 transformer system or 3AC traction system.
9/3042/CDV – 10 – IEC CDV 62590-3-2 © IEC 2024
95 3.1.2
96 electric power network
97 particular installations, substations, lines or cables for the transmission and distribution of
98 electricity
99 Note 1 to entry: The boundaries of the different parts of this network are defined by appropriate criteria, such as
100 geographical situation, ownership, voltage, etc.
101 Note 2 to entry: In this document, this term is used to indicate a power supply network from which an electric
102 traction power supply system receives electric power.
103 Note 3 to entry: A lot of synonyms are used indicating special properties like distribution network, transmission
104 network, national grid, upstream network, or others. The term electric power network is chosen because it is the most
105 general.
106 [SOURCE: IEC 60050-601:1985, 601-01-02, modified – Notes 2 and 3 to entry have been
107 added]
108 3.1.3
109 three-phase power network
110 3AC power network
111 electric power network operating with three phases AC
112 3.1.4
113 electric traction power supply system
114 railway electric distribution network used to provide energy for rolling stock
115 Note 1 to entry: The system includes:
116 • contact line systems,
117 • return circuit of electric traction power supply systems,
118 • electric installations in power plants and substations, which are utilized solely for generation and distribution of
119 power directly to the contact line,
120 • electric installations of switching stations.
121 [SOURCE: [SOURCE: IEC 60050-811:2017, 811-36-21, modified – "power supply" inserted in
122 the term, Note 1 to entry exclusion of the points "running rails of non-electrified lines in the
123 vicinity of, and conductively connected to the running rails of an electric traction power supply
124 system ", and "electrical installations which are supplied from contact lines either directly or via
125 a transformer"]
126 3.1.5
127 railway transmission network
128 railway electric distribution network with particular installations, substations, lines or cables for
129 the transmission and distribution of electric traction power.
130 Note 1 to entry: The system is not directly connected to the contact line system
131 Note 2 to entry: A railway transmission network can be considered as 1AC or 2AC system
132 Note 3 to entry: The railway transmission network is connected to the 3AC power network and electric traction power
133 supply system and operates with the same frequency as the electric traction power supply system.
134 3.1.6
135 network operation strategy
136 intended strategy for the electrical operation, (supply) component characteristic and behaviour
137 of the railway transmission network and/or electric traction power supply system
138 3.1.7
139 supply voltage,
140 voltage at the interface point of the SFC to the connected network, 1AC or 3AC
IEC CDV 62590-3-2 © IEC 2024 – 11 – 9/3042/CDV
141 Note 1 to entry: The interface point is normally the connection to a switchgear
142 3.1.8
143 network configuration
144 topology and supply concept of the electric traction power supply system or railway transmission
145 network
146 3.1.9
147 operation mode,
148 control functions of the SFC defining a basic operating condition
149 EXAMPLE On, Off or VAR compensator mode
150 3.1.10
151 converter substation,
152 traction substation equipped with one or more SFCs
153 Note 1 to entry: A converter substation can also include other equipment like rotating converters.
154 EXAMPLE Traction substations (see IEC 60050 section 811-36-02), converter substation (see IEC 60050 section
155 605-01-07)
156 3.1.11
157 synchronized operation
158 operation of equipment connected to the same network using the same frequency
159 Note 1 to entry: The amplitude and the phase angle of a voltage can be used to control the load flow within a network.
160 3.1.12
161 single source mode
162 network operation strategy with one substation supplying a traction power supply system
163 without other substations
164 Note 1 to entry: In some countries also called island mode or island operation.
165 3.1.13
166 fault ride through
167 functional characteristic to continue operation and providing a short-circuit current in the event
168 of a network fault without any interruption
169 Note 1 to entry: The SFC may stop the operation after a user defined time period.
170 3.1.14
171 frequency stiff operation
172 the frequency of the electric traction system or railway transmission network is directly coupled
173 to the frequency of the 3AC power network
174 EXAMPLE networks connected via transformer or synchronous – synchronous machine sets
175 3.1.15
176 frequency flexible operation
177 the frequency of the electric traction system or railway transmission network is decoupled from
178 the frequency of the 3AC power network
179 EXAMPLE network connected via rotating synchronous – asynchronous machine sets
180 3.2 Abbreviations
181 AC alternating current
182 cos phi fundamental power factor
9/3042/CDV – 12 – IEC CDV 62590-3-2 © IEC 2024
183 G rotating machine operating as generator
184 HIL hardware in the loop
185 M rotating machine operating as motor
186 P active power
187 PoC point of coupling
188 Q reactive power
189 SCADA supervisory control and data acquisition
190 SFC static frequency converter
191 U voltage
192 4 System configuration with SFC application
193 4.1 General
194 Possible main features of the SFC application can be:
195 • controlled exchange of active power between a 3AC power network and an electric traction
196 power supply systems or railway transmission network
197 • independent control of reactive power in both electrical power networks
198 • if applicable, independent operation with different frequencies in both electric power
199 networks
200 • balanced operation in the 3AC power network
201 • filtering of single-phase pulsating power with doubled fundamental frequency (e.g. 33,4 Hz
202 DC-Link filter for a 16,7 Hz network)
203 Further optional features and benefits of the SFC can be:
204 • different control functions and operation scenarios possible in alignment with the network
205 configuration and network operation strategy
206 • improvement of power quality in both electric power networks by power factor control
207 • improvement of power quality in both electric power networks by influencing of non-
208 fundamental frequency components
209 • parallel operation with different equipment in the same substation (e.g. with a rotary
210 converter)
211 The application of SFC for the sole purpose of battery charging infrastructure is not the focus
212 of the standard, but some clauses can be applied to specify SFCs for this purpose.
213 The SFC can either supply directly into the electric traction power supply system or into a
214 railway transmission network. Figure 1 shows two examples for possible SFC applications,
215 further application examples are described in Annex A.
IEC CDV 62590-3-2 © IEC 2024 – 13 – 9/3042/CDV
L1
3AC electrical
power network
L2
L3
M/G
3~
3~
SFC
1~
G/M
1~
railway transmission
network 3~
SFC
1~
electric traction
power supply
system
217 Figure 1 – Example applications of SFC in a railway transmission network and an
218 electric traction power supply system
219 For each SFC application scenario different network configurations, network operation
220 strategies and converter control functions can be applicable. The network configuration and
221 network operation strategy are different for electric traction power supply systems and railway
222 transmission networks. The network configuration and network operation strategy are
223 depending on the network topology and, if applicable, additional substations with interfaces to
224 the 3AC power network. Railway electric transmission networks have in general a more meshed
225 network topology. The choice of the network operation strategy should be made under
226 consideration of:
227 • network topology and network configuration
228 • intended load distribution between substations
229 • type of additional substations with an interface to the 3AC power network
230 • frequency relation between 3AC power network and electric traction power supply systems,
231 fixed or flexible frequency operation
232 • prevention of an unintended load flow
233 • operation in outage scenarios
234 Annex A provides an overview of network configurations with SFC application. Examples of
235 applicable converter control functions are described in Annex B.
236 4.2 Components of an SFC
237 Static frequency converters consist of many different components. In Figure 2 the basic
238 components of an SFC and the interfaces are shown.
9/3042/CDV – 14 – IEC CDV 62590-3-2 © IEC 2024
Interface 3AC side Interface 1AC side
Semiconductor
valve device assembly
3AC transformer or 1AC transformer or
Switchgear 3AC inductor inductor Switchgear 1AC railway
electrical power transmission network / 1AC
control
network electrical traction system
Additional converter components
• Network filter
• Circuit breakers, earthing switches
• Protection and control equipment
• Auxiliary system (cooling)
239 Figure 2 – SFC components and interfaces
240 The main components within the scope of an SFC are:
241 • semiconductor valve device assemblies (including DC-Link filters or branch reactors, if
242 applicable)
243 • 3AC transformers and/or reactors
244 • 1AC transformers and/or reactors
245 • optional network filters
246 • switching devices (e.g. earthing switches, circuit breakers)
247 • auxiliary system (e.g., cooling components)
248 • control components (including measurement equipment)
249 Main parameters of the components are determined by the manufacturer of the SFC. For
250 transformers of converters IEC 62695 is applicable. Auxiliaries are working mainly with low
251 voltage, IEC 60364-1 and correlated standards are applicable.
252 At least one transformer shall be installed on either one of the two sides of the SFC to ensure
253 a galvanic isolation.
254 NOTE 1 Some of the main components (e.g., switching devices) might not be in the scope of the SFC, but managed
255 separately.
256 A converter substation can contain one or more SFCs as well as additional interfaces to the
257 3AC power network, for example rotating converters or transformers. In case more than one
258 SFC is connected in the same substation, their parallel operation shall be aligned.
259 NOTE 2 A parallel operation strategy without the need for communication is beneficial for the system availability and
260 transient stability.
261 5 Design and integration
262 5.1 General
263 The SFC shall be designed to operate safely within the defined operational area of each project
264 specific power network. The design of the SFC with regards to dimensioning, current carrying
265 capacity, load profile, short circuit capacity, voltage and frequency immunity shall be done with
266 respect to the weakest component. Individual components of the SFC can be designed using
267 their individual characteristics.
268 For a SFC project and specification the following process can be used:
IEC CDV 62590-3-2 © IEC 2024 – 15 – 9/3042/CDV
269 1) Define the network configurations according to Annex A, including the operation outage
270 scenarios. And align the network operation strategy.
271 2) Define the control functions according to Annex B and under consideration of the chosen
272 network configuration.
273 3) Determine the expected load flow to dimension the SFC as described in 5.4.
274 4) Define the fault behaviour depending on the previous steps considering a network protection
275 concept for the electric traction power supply system. An alignment between the functions
276 and parameters of protection relays and the behaviour of the converter is important.
277 5.2 Requirements to be indicated by the user
278 5.2.1 General
279 For design, installation, and operation of the SFC, interfaces and requirements shall be defined.
280 The user shall define all nominal values, operation ranges and all relevant application interfaces
281 of the SFC. These definitions should be part of the SFC project specification.
282 Furthermore, the user supplies all information about the power networks and connected
283 systems, which are required for the SFC design and SFC operation.
284 Typically, the network parameters are calculated by network calculations or simulations.
285 Whenever possible, the network parameters of the relevant connected systems shall be used
286 for the design of the converter.
287 Some required network parameters may be difficult to be provided by the user. In this case the
288 user can use assumptions in the SFC specification. The usage of assumptions may lead to a
289 deterioration of the design quality and should be indicated.
290 5.2.2 Process for ensuring network compatibility
291 The user has the main responsibility for the network compatibility of the SFC and should define
292 a process to ensure the network compatibility of the SFC with the 3AC power network and the
293 1AC electric traction power supply system.
294 This process shall be part of the SFC specification.
295 The manufacturer shall follow the defined network compatibility process and shall verify the
296 SFC's performance against the specified requirements defined by the user.
297 5.2.3 Specification of SFC parameters
298 As part of the specification the user shall indicate at least the following basic parameters of the
299 SFC:
300 • rated apparent power of the SFC
301 • rated operation voltage of the power networks
302 • rated operation frequency of both power networks
303 • range of operation (e.g. P/Q diagram), see 5.4
304 • environmental requirements for the operation of the SFC, see 6.7.4
305 • site conditions and mechanical requirements of the SFC, see 6.7
307 The specification of the SFC shall also consider the following aspects and boundary conditions:
9/3042/CDV – 16 – IEC CDV 62590-3-2 © IEC 2024
309 • valid and applicable standards, regulations, and laws for the design and the operation
310 of the SFC (general and country specific)
311 • project specific interface requirements to the electric traction power supply system , see
312 chapter 5.2.4
313 • project specific interface requirements to the 3AC power network, see 5.2.5
314 • requirements of the operation modes and sequences of the SFC (normal operation,
315 sequences and change of the operating mode), see 5.5.2
316 • requirements on SFC electric behaviour during normal operation, see 5.5.3.2 and
317 5.5.4.1
318 • requirements on SFC electric behaviour during network faults, see 5.5.3.3 and 5.5.4.2
319 • requirements for the earthing concept of the SFC to fulfil the requirements from 3AC
320 power network and/or electrical traction power supply system
321 • requirements for availability and reliability, according to IEC 62278, see Annex D
322 • definition of the interface to the local substation control and protection system for
323 equipment outside of the SFC and SCADA
324 • requirements for compatibility between several SFC’s within one substation
325 • optional requirements for the control of the SFC on the 3AC power network and the
326 electric traction power supply system
327 5.2.4 Interface to the electric traction power supply system
328 The user of the SFC shall clarify the terms of operation for the SFC at the electric traction power
329 supply system and provide the applicable standards, rules and regulations. Country specific
330 regulations shall be considered.
331 The user of the SFC shall describe the project specific network configuration and network
332 operation strategy of the traction power supply
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