HVDC Grid Systems and connected Converter Stations - Guideline and Parameter Lists for Functional Specifications - Part 1: Guidelines

This document in conjunction with CLC/TS 50654-2: 2018-03 Parameter Lists to Functional Specifications describes specific functional requirements for HVDC Grid Systems in Europe. The terminology "HVDC Grid Systems" is used here describing HVDC systems for power transmission having more than two converter stations connected to a common DC circuit.
While this document focuses on requirements, that are specific for HVDC Grid Systems, some requirements are considered applicable to all HVDC systems in general, i.e. including point-to-point HVDC systems. Existing IEC, Cigré or other documents relevant have been used for reference as far as possible.
Corresponding to electric power transmission applications, this document is applicable to high voltage systems, i.e. only nominal DC voltages equal or higher than 50 kV with respect to earth are considered in this document.

Hochspannungsgleichstrom-Netzsysteme - Leitfaden und Parameter-Listen für funktionale Spezifikationen - Teil 1: Leitfaden

Réseaux CCHT et stations de conversion connectées - Lignes directrices et listes de paramètres pour les spécifications fonctionnelles - Partie 1: Lignes directrices

Sistemi visokonapetostnega enosmernega omrežja in priključene pretvorniške postaje - Smernice in seznam parametrov za funkcijsko specifikacijo - 1. del: Smernice

General Information

Status
Published
Publication Date
19-Jul-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
07-Jul-2020
Due Date
11-Sep-2020
Completion Date
20-Jul-2020

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SLOVENSKI STANDARD
SIST-TS CLC/TS 50654-1:2020
01-september-2020
Nadomešča:
SIST-TS CLC/TS 50654-1:2018
Sistemi visokonapetostnega enosmernega omrežja in priključene pretvorniške
postaje - Smernice in seznam parametrov za funkcijsko specifikacijo - 1. del:
Smernice

HVDC Grid Systems and connected Converter Stations - Guideline and Parameter Lists

for Functional Specifications - Part 1: Guidelines
Hochspannungsgleichstrom-Netzsysteme - Leitfaden und Parameter-Listen für
funktionale Spezifikationen - Teil 1: Leitfaden

Réseaux CCHT et stations de conversion connectées - Lignes directrices et listes de

paramètres pour les spécifications fonctionnelles - Partie 1: Lignes directrices
Ta slovenski standard je istoveten z: CLC/TS 50654-1:2020
ICS:
29.240.01 Omrežja za prenos in Power transmission and
distribucijo električne energije distribution networks in
na splošno general
SIST-TS CLC/TS 50654-1:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CLC/TS 50654-1:2020
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SIST-TS CLC/TS 50654-1:2020
TECHNICAL SPECIFICATION CLC/TS 50654-1
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
June 2020
ICS 29.240.01 Supersedes CLC/TS 50654-1:2018
English Version
HVDC Grid Systems and connected Converter Stations -
Guideline and Parameter Lists for Functional Specifications -
Part 1: Guidelines

Réseaux CCHT et stations de conversion connectées - Hochspannungsgleichstrom-Netzsysteme - Leitfaden und

Lignes directrices et listes de paramètres pour les Parameter-Listen für funktionale Spezifikationen - Teil 1:

spécifications fonctionnelles - Partie 1: Lignes directrices Leitfaden
This Technical Specification was approved by CENELEC on 2020-04-13.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly

at national level in an appropriate form. It is permissible to keep conflicting national standards in force.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. CLC/TS 50654-1:2020 E
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SIST-TS CLC/TS 50654-1:2020
CLC/TS 50654-1:2020 (E)
Contents Page

European foreword ............................................................................................................................................. 6

Introduction ......................................................................................................................................................... 7

1 Scope ..................................................................................................................................................... 8

1.1 General .................................................................................................................................................. 8

1.2 About the Present Release .................................................................................................................... 8

2 Normative references ............................................................................................................................. 9

3 Terms, definitions and abbreviations ................................................................................................... 10

3.1 Terms and definitions ........................................................................................................................... 10

3.2 Abbreviations ....................................................................................................................................... 12

4 Coordination of HVDC Grid System and AC Systems ........................................................................ 13

4.1 General ................................................................................................................................................ 13

4.2 Purpose of the HVDC Grid System and Power Network Diagram ...................................................... 13

4.3 AC/DC Power Flow Optimisation ......................................................................................................... 14

4.4 Converter Operational Functions ......................................................................................................... 15

4.4.1 General ............................................................................................................................................. 15

4.4.2 Basic Operation Functions – Converter Normal Operation State ..................................................... 15

4.4.3 Basic Operation Functions – Converter Abnormal Operation State ................................................. 16

4.4.4 Ancillary Services.............................................................................................................................. 18

5 HVDC Grid System Characteristics ..................................................................................................... 23

5.1 HVDC Circuit Topologies ..................................................................................................................... 23

5.1.1 Availability and Reliability ................................................................................................................. 23

5.1.2 Basic Characteristics and Nomenclature .......................................................................................... 23

5.1.3 Attributes of HVDC Grid Systems or HVDC Grid Sub-Systems ....................................................... 27

5.1.4 Attributes of a Station ....................................................................................................................... 28

5.2 Connection Modes ............................................................................................................................... 29

5.3 Grid Operating States .......................................................................................................................... 29

5.3.1 General ............................................................................................................................................. 29

5.3.2 Normal State ..................................................................................................................................... 29

5.3.3 Alert State ......................................................................................................................................... 29

5.3.4 Emergency State .............................................................................................................................. 29

5.3.5 Blackout State ................................................................................................................................... 29

5.3.6 Restoration ........................................................................................................................................ 30

5.4 DC Voltages ......................................................................................................................................... 30

5.4.1 General ............................................................................................................................................. 30

5.4.2 Nominal DC System Voltage ............................................................................................................ 30

5.4.3 Steady-State DC Voltage .................................................................................................................. 30

5.4.4 Temporary DC Voltage ..................................................................................................................... 31

5.4.5 Neutral Bus Voltages ........................................................................................................................ 32

5.5 Insulation Coordination ........................................................................................................................ 33

5.6 Short-Circuit Characteristics ................................................................................................................ 33

5.6.1 Calculation of Short-Circuit Currents in HVDC Grid Systems .......................................................... 33

5.6.2 Short-Circuit Current Design Requirements ..................................................................................... 34

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SIST-TS CLC/TS 50654-1:2020
CLC/TS 50654-1:2020 (E)

5.7 Steady-State Voltage and Current Distortions ..................................................................................... 34

5.7.1 Voltage and Current Distortion Limits ............................................................................................... 34

5.7.2 Frequency Dependent DC System Impedance ................................................................................ 36

5.8 DC System Restoration ........................................................................................................................ 37

5.8.1 General .............................................................................................................................................. 37

5.8.2 Post DC Fault Recovery .................................................................................................................... 37

5.8.3 Restoration from Blackout ................................................................................................................. 37

6 HVDC Grid System Control .................................................................................................................. 37

6.1 Closed-Loop Control Functions ............................................................................................................ 37

6.1.1 General .............................................................................................................................................. 37

6.1.2 Core Control Functions ..................................................................................................................... 38

6.1.3 Coordinating Control Functions ......................................................................................................... 38

6.2 Controller Hierarchy ............................................................................................................................. 38

6.2.1 General .............................................................................................................................................. 38

6.2.2 Internal Converter Control ................................................................................................................. 39

6.2.3 DC Node Voltage Control .................................................................................................................. 40

6.2.4 Coordinated HVDC Grid System Control .......................................................................................... 41

6.2.5 AC/DC Grid Control ........................................................................................................................... 43

6.3 Propagation of Information ................................................................................................................... 44

6.4 Open-Loop Controls ............................................................................................................................. 45

6.4.1 Coordination of Connection Modes between Stations and their PoC-DCs ....................................... 45

6.4.2 Operating Sequences for HVDC Grid System Installations .............................................................. 45

6.4.3 Post DC Fault Recovery .................................................................................................................... 46

7 HVDC Grid System Protection ............................................................................................................. 47

7.1 General ................................................................................................................................................. 47

7.2 DC Fault Separation ............................................................................................................................. 47

7.3 Protection System Related Installations and Equipment ..................................................................... 48

7.3.1 AC/DC Converter Station .................................................................................................................. 48

7.3.2 HVDC Grid System Topology and Equipment .................................................................................. 48

7.4 HVDC Grid System Protection Zones .................................................................................................. 49

7.4.1 General .............................................................................................................................................. 49

7.4.2 Permanent Stop P ............................................................................................................................. 51

7.4.3 Permanent Stop PQ .......................................................................................................................... 53

7.4.4 Temporary Stop P ............................................................................................................................. 54

7.4.5 Temporary Stop PQ .......................................................................................................................... 56

7.4.6 Continued Operation ......................................................................................................................... 56

7.4.7 Example of a Protection Zone Matrix ................................................................................................ 58

7.5 DC Protection ....................................................................................................................................... 59

7.5.1 General .............................................................................................................................................. 59

7.5.2 DC Converter Protections ................................................................................................................. 60

7.5.3 HVDC Grid System Protections ........................................................................................................ 60

7.5.4 DC Grid Protection Communication .................................................................................................. 61

8 AC/DC Converter Stations ................................................................................................................... 62

8.1 Introduction ........................................................................................................................................... 62

8.2 AC/DC Converter Station Types .......................................................................................................... 62

8.3 Overall Requirements ........................................................................................................................... 63

8.3.1 Robustness of AC/DC Converter Stations ........................................................................................ 63

8.3.2 Availability and Reliability .................................................................................................................. 63

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SIST-TS CLC/TS 50654-1:2020
CLC/TS 50654-1:2020 (E)

8.3.3 Active Power Reversal ...................................................................................................................... 64

8.4 Main Circuit Design .............................................................................................................................. 64

8.4.1 General Characteristics .................................................................................................................... 64

8.4.2 DC Side ............................................................................................................................................. 65

8.4.3 AC Side ............................................................................................................................................. 74

8.5 Controls ................................................................................................................................................ 75

8.5.1 General ............................................................................................................................................. 75

8.5.2 Automated vs. Manual Operation ..................................................................................................... 75

8.5.3 Control Modes & Support of Coordination ........................................................................................ 75

8.5.4 Limitation Strategies ......................................................................................................................... 75

8.5.5 Operating Sequences for AC/DC Converter Station ........................................................................ 75

8.5.6 Dynamic Behaviour ........................................................................................................................... 78

8.6 Protection ............................................................................................................................................. 79

8.6.1 General ............................................................................................................................................. 79

8.6.2 Configuration Requirements ............................................................................................................. 79

8.6.3 Function Requirements ..................................................................................................................... 79

8.6.4 DC Grid Interface .............................................................................................................................. 81

8.6.5 Fault Separation Strategy for Faults inside the AC/DC Converter Station ....................................... 81

8.6.6 Coordination of the DC Protection with the HVDC Grid System ...................................................... 82

8.6.7 Example for Coordination of the DC Protection with the HVDC Grid System .................................. 82

9 HVDC Grid System Installations .......................................................................................................... 84

9.1 General ................................................................................................................................................ 84

9.2 DC Switching Station ........................................................................................................................... 87

9.2.1 Overall Requirements ....................................................................................................................... 87

9.2.2 Main Circuit Design ........................................................................................................................... 88

9.2.3 Controls ............................................................................................................................................. 98

9.2.4 Protection .......................................................................................................................................... 99

9.3 Transmission Lines and Transition Stations ...................................................................................... 102

9.4 DC/DC Converter Stations ................................................................................................................. 102

9.5 DC Line Power Flow Controllers ........................................................................................................ 102

10 Models and Validation ........................................................................................................................ 102

10.1 Introduction ........................................................................................................................................ 102

10.2 HVDC Grid System Studies ............................................................................................................... 102

10.2.1 Type of Studies ............................................................................................................................... 102

10.2.2 Tools and Methods ......................................................................................................................... 104

10.3 Model General Specifications ............................................................................................................ 104

10.3.1 Introductory note ............................................................................................................................. 104

10.3.2 Model Capability ............................................................................................................................. 104

10.3.3 Model Format and Data Type ......................................................................................................... 105

10.3.4 Model Aggregation .......................................................................................................................... 105

10.4 Model Specific Recommendations .................................................................................................... 105

10.4.1 Load Flow Models ........................................................................................................................... 105

10.4.2 Short-Circuit Models ....................................................................................................................... 106

10.4.3 Protection System Models .............................................................................................................. 106

10.4.4 Insulation Coordination Related Models ......................................................................................... 106

10.4.5 Electromechanical Transient Models .............................................................................................. 107

10.4.6 Electromagnetic Transient Models ................................................................................................. 107

10.4.7 Power Quality Models ..................................................................................................................... 108

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CLC/TS 50654-1:2020 (E)

10.5 Model Validation ................................................................................................................................. 109

10.6 Compliance Simulation ....................................................................................................................... 111

10.7 Outputs/Results .................................................................................................................................. 111

10.7.1 Model Data ...................................................................................................................................... 111

10.7.2 Model Documentation ..................................................................................................................... 111

10.7.3 Model Example ................................................................................................................................ 112

10.7.4 Model Compliance Documentation ................................................................................................. 112

10.7.5 Model Validation Documentation – Model Final Version ................................................................ 112

10.7.6 Model Guarantee ............................................................................................................................. 112

11 HVDC Grid System Integration Tests................................................................................................. 112

11.1 Off-Site Testing of the HVDC Control and Protection System ........................................................... 113

11.2 Dynamic Performance Study/Tests (DPS) Performed with Offline Models ....................................... 114

11.2.1 DPS Simulations in a Multi-Vendor Environment ............................................................................ 114

11.2.2 DPS Simulations Scenarios ............................................................................................................ 115

11.3 Factory Tests ...................................................................................................................................... 115

11.3.1 General ............................................................................................................................................ 115

11.3.2 Factory Test Scenarios ................................................................................................................... 115

11.3.3 Factory Tests when Existing System C&P Replicas are Available ................................................. 116

11.3.4 Factory Tests when Existing System C&P Replicas are not Available ........................................... 119

11.4 On Site Testing ................................................................................................................................... 121

Bibliography .................................................................................................................................................... 123

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SIST-TS CLC/TS 50654-1:2020
CLC/TS 50654-1:2020 (E)
European foreword

This document (CLC/TS 50654-1:2020) has been prepared by CLC/TC 8X “System aspects of electrical energy

supply”.
This document supersedes CLC/TS 50654-1:2018.

CLC/TS 50654-1:2020 includes the following significant technical changes with respect to CLC/TS 50654-

1:2018:
— new content concerning AC/DC converter stations;

— new content concerning HVDC Grid System installations, including DC switching stations;

— new content concerning HVDC Grid System integration tests.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

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SIST-TS CLC/TS 50654-1:2020
CLC/TS 50654-1:2020 (E)
Introduction

HVDC Grid Systems are a new field of technology. There are very few systems with a small number of converter

stations in operation; some more are in execution or in detailed planning.

The Guidelines and Parameter Lists to Functional Specifications are presented featuring planning, specification

and execution of multi-vendor HVDC Grid Systems in Europe. Being elaborated by a team of experts from

leading vendors of HVDC technology, Transmission System Operators (TSO's), Academia and Institutions in

Europe, the present document provides a commonly agreed basis for an open market of compatible equipment

and solutions for HVDC Grid Systems. Executing such systems and gaining operational experience is seen an

important prerequisite for developing corresponding technical standards in the future.

By elaborating this document, special care has been taken to as far as possible describe the requirements in a

technologically independent way. In order to achieve that, a function of interest is described by a comprehensive

set of parameters. The parameters are selected based on a systematic analysis of physical phenomena relevant

to achieve the requested functionality. The physical phenomena are categorized in order to show the mutual

dependence of the individual parameters and ensure completeness of the physical aspects to be considered.

Based on a clearly defined common language describing the functionalities requested, existing technologies

can be applied, or new dedicated technical solutions can be developed.

Reflecting the early stage of technology, these Guidelines and Parameter Lists to Functional Specifications need

comprehensive explanations and background information for the technical parameters. This dual character of

the content will be represented by two corresponding parts:

• Part I “Guidelines” containing the explanations and the background information in context with the

Parameter Lists.

• Part II “Parameter Lists” containing the essential lists of parameters and values de

...

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