Share

TB 697 2017 Testing and commissioning of VSC HVDC systems

The technical brochure provides a practical guideline for the testing and commissioning of VSC HVDC schemes including a complete description of each of the three stages of commissioning (factory tests, subsystems tests and system tests). This technical brochure provides a summary of typical tests that make up each stage pf testing and commissioning and for the system testing elements, provides a guide on the purpose, preconditions, procedure and acceptance criteria applicable to each test. The technical brochure also deals with other key aspects of the testing and commissioning of VSC systems, including the management of the commissioning process, training opportunities, documentation and approaches to deal with practical limitations to on site testing.

Download TB from ecigre website (prior identification in ecigre is required in other open page)

Voltage Source Converter (VSC) technology has emerged as a commercially viable alternative to Line Commutated Converter (LCC) technology for certain applications of HVDC power transmission. With the first commercial VSC projects commissioned in the late 1990s, at the time of the development of this Technical Brochure there is over fifteen years of project and operational experience with this technology. VSC has become the preferred, if not the only, choice of technology for specific applications, including low power transfer applications, the connection of weak networks, offshore wind farm connections and d.c. grid developments.

Commissioning occurs during the latter stages of an HVDC project. It allows the HVDC supplier to verify and demonstrate the suitability of the installed equipment, the functional completeness of the system and compliance with the requirements of the relevant contracts and specifications. Commissioning also allows adjustments and optimisation to the HVDC system to be made and allows the owners, developers and/or end-user of the HVDC system to witness and be satisfied that the project and operational requirements have been demonstrated.

Table of Contents

EXECUTIVE SUMMARY

1. INTRODUCTION

   1.1 STATEMENT OF PURPOSE

   1.2 TERMS OF REFERENCE

2. OVERVIEW OF VSC HVDC TRANSMISSION

   2.1 VSC CIRCUIT CONFIGURATIONS

   2.2 CONTROL MODES AND OPERATING STATES

3. STAGES AND SEQUENCE OF VSC COMMISSIONING

   3.1 OVERVIEW OF VSC TESTING AND COMMISSIONING PROCESS

   3.2 FACTORY TESTS

   3.3 PRE-COMMISSIONING

   3.4 SUBSYSTEM TESTS

   3.5 SYSTEM TESTS

   3.6 CUSTOMER ACCEPTANCE TESTS AND GRID CODE COMPLIANCE TESTS

   3.7 EXPECTED CHALLENGES

4. OFF-SITE TESTING OF THE HVDC CONTROL AND PROTECTION SYSTEM

   4.1 DYNAMIC PERFORMANCE STUDY (DPS)

   4.2 FACTORY TESTS OF THE C&P SYSTEMS

   4.3 INTERACTION STUDIES

5. SUBSYSTEM TESTING

   5.1 POWER, CONTROL AND COMMUNICATION CABLING SYSTEMS

   5.2 A.C. PROTECTIONS AND INTERLOCKING

   5.3 MAIN CIRCUIT EQUIPMENT

   5.4 HVDC CONTROL AND PROTECTION SYSTEM

   5.5 AUXILIARY SYSTEMS

6. SYSTEM TESTING – GENERAL REQUIREMENTS

7. HIGH VOLTAGE ENERGISATION

   7.1 INTRODUCTION

   7.2 A.C. SWITCHYARD ENERGISATION

   7.3 A.C. FILTER ENERGISATION

   7.4 INTERFACE TRANSFORMER ENERGISATION

   7.5 BLOCKED CONVERTER ENERGISATION

   7.6 ENERGISATION FROM D.C. SIDE (WHERE APPLICABLE)

8. TERMINAL TESTS

   8.1 INTRODUCTION

   8.2 FIRST DEBLOCK

   8.3 PROTECTIVE ACTION TESTS

   8.4 CHANGE OF CONTROL MODES

   8.5 REACTIVE POWER CONTROL (RPC)

   8.6 A.C. VOLTAGE CONTROL (ACVC)

   8.7 STEP RESPONSES

9. TRANSMISSION TESTS

   9.1 INTRODUCTION

   9.2 ENERGISATION OF D.C. CABLE/LINE

   9.3 FIRST POWER TRANSMISSION

   9.4 TEST OF ACTIVE POWER CONTROL AND STEADY STATE TESTS

   9.5 TEST OF A.C. VOLTAGE CONTROL AND REACTIVE POWER CONTROL MODES AT LOW ACTIVE POWER

   9.6 STEP RESPONSES

   9.7 HIGH POWER TRANSMISSION TESTS

   9.8 CHANGES OF D.C. CONFIGURATION

   9.9 HEAT RUN TEST (INCLUDING OVERLOAD)

10. OPERATION AND INTEGRATION TESTS

   10.1 CONTROL SYSTEM CHANGEOVERS (LOSS OF REDUNDANT EQUIPMENT)

   10.2 CHANGE OF CONTROL LOCATION

   10.3 REMOTE CONTROL APPLICATION

   10.4 LOSS OF TELECOMMUNICATIONS TESTS - GENERAL

   10.5 STATION-STATION COMMUNICATIONS FAILURE TEST

   10.6 REMOTE CONTROL CENTRE – CONVERTER STATION COMMUNICATIONS FAILURE TEST

   10.7 LOSS OF AUXILIARY POWER SUPPLIES

   10.8 BLACK START (IF APPLICABLE)

11. POWER QUALITY AND INTERFERENCE TESTS

   11.1 A.C. AND D.C. HARMONIC MEASUREMENTS

   11.2 AUDIBLE NOISE

   11.3 INTERFERENCE MEASUREMENTS

12. A.C. NETWORK INTERACTION TESTS

   12.1 PRECONDITIONS OF A.C. NETWORK AND REMOTE GENERATION INTERACTION TESTS

   12.2 TRANSMISSION NETWORK SWITCHING AND STAGED FAULTS

   12.3 SPECIAL PROTECTION SCHEMES

   12.4 TESTING OF A.C. NETWORK AND CONTROL INTERACTIONS

   12.5 TESTING POWER OSCILLATION DAMPING

   12.6 TEST OF SSR DAMPING CONTROLS

   12.7 VERIFICATION OF NON-EXISTENT CONTROL INTERACTIONS

   12.8 INTERACTIONS WITH OTHER HVDC LINKS (AND OTHER FACTS DEVICES)

13. TRIAL OPERATION

   13.1 INTRODUCTION

   13.2 PURPOSE OF TEST

   13.3 TEST PRECONDITIONS

   13.4 TEST PROCEDURE

   13.5 TEST ACCEPTANCE CRITERIA

14. COMMISSIONING MANAGEMENT AND COORDINATION

   14.1 COMMISSIONING PLANNING

   14.2 CUSTOMER ACCEPTANCE / GRID CODES

   14.3 SPECIAL PROTECTION SCHEME AND/OR RUN-BACK SCHEMES

   14.4 COORDINATION OF TEST ENERGY

   14.5 SITE MANAGEMENT DURING COMMISSIONING

   14.6 HEALTH AND SAFETY AND ENVIRONMENT

   14.7 TRAINING OPPORTUNITIES FOR OWNER STAFF

15. DOCUMENTATION

   15.1 SITE TEST OUTLINE

   15.2 TEST PLAN

   15.3 TEST SCHEDULE

   15.4 TEST PROCEDURES

   15.5 TEST RECORDS

   15.6 FINAL REPORT

16. KEY ISSUES AND CHALLENGES

   16.1 RELATIONSHIP BETWEEN FACTORY TESTS AND COMMISSIONING TESTS

   16.2 PRACTICAL LIMITATIONS OF SITE TESTING

   16.3 COMMISSIONING ISSUES SPECIFIC TO CERTAIN APPLICATIONS

A.1. SPECIFIC TERMS

A.2. ABBREVIATIONS

APPENDIX A. DEFINITIONS AND ABREVIATIONS

APPENDIX B. REFERENCES

APPENDIX C. SAMPLE TEXT MATRIX

APPENDIX D. TEMPLATE OF FINAL COMMISSIONING REPORT