EXECUTIVE SUMMARY................................................................................................... 8
1. INTRODUCTION ...................................................................................................... 9
2. TEST DEFINITIONS................................................................................................. 10
2.1 Introduction and Definitions ............................................................................ 10
2.2 Reliability drivers for on-site tests ................................................................... 12
2.3 Questionnaire for on-site tests of UHV Substations ......................................... 15
2.4 References ....................................................................................................... 18
3. ON-SITE ACCEPTANCE TESTS FOR UHV SUBSTATIONS ............................................ 19
3.1 IEC Standards for on-site acceptance tests ...................................................... 19
3.1.1 IEC 60060-3................................................................................................ 19
3.1.2 Related clauses in IEC equipment standards ................................................ 20
3.2 Questionnaire results for GIS and transformers................................................ 22
3.2.1 GIS on-site acceptance tests ........................................................................ 22
3.2.2 Transformer on-site acceptance tests.......................................................... 23
3.3 Summary and recommendations ...................................................................... 25
3.3.1 GIS on-site acceptance testing..................................................................... 25
3.4 References ....................................................................................................... 33
4. COMMISSIONING TESTS FOR UHV SUBSTATIONS ..................................................... 34
4.1 Commissioning of the 1100 kV transmission demonstration project in China . 34
4.1.1 Research on commissioning tests ................................................................ 36
4.1.2 Results of Voltage-Raising Tests ................................................................. 37
4.1.3 Results of Equipment Switching Experiments............................................... 39
4.1.4 Results of Network Tests ............................................................................. 42
4.1.5 Conclusion................................................................................................... 44
4.2 Commissioning tests of the 1100kV transmission demonstration project in Japan 45
4.2.1 UHV Test Station.......................................................................................... 45
4.2.2 Commissioning tests ................................................................................... 48
4.2.3 Commissioning test example for Corona noise ............................................ 50
4.2.4 Electrostatic induction of service entrance for UHV transmission line .......... 53
4.3 Commissioning tests at the 1200 kV transmission demonstration project of
India 54
4.3.1 1200 kV National Test Station at Bina substation......................................... 54
4.3.2 On-site acceptance tests ............................................................................. 58
4.3.3 Charging of the 1200 kV National Test Station ............................................ 59
4.3.4 Commissioning tests at the 1200 kV National Test Station .......................... 59
4.4 Commissioning test questionnaire results and analysis ....................................... 64
4.5 Summary and recommendations for commissioning tests................................ 65
4.6 References ....................................................................................................... 65
5. MAINTENANCE TESTS ............................................................................................ 66
5.1 Maintenance tests in China .................................................................................. 66
5.1.1 Introduction.................................................................................................... 66
5.1.2 Maintenance test items of typical 1000 kV UHV AC equipment....................... 66
5.2 Maintenance tests in Japan............................................................................... 68
5.2.1 Introduction.................................................................................................... 68
5.2.2 Maintenance tests of UHV equipment ............................................................. 69
5.2.3 Maintenance test items ................................................................................ 69
5.3 Maintenance tests in India ................................................................................... 71
5.3.1 1200kV transformers................................................................................... 71
5.3.2 1200 kV SF6 Circuit Breaker (CB)’s ............................................................... 72
5.4 Maintenance test questionnaire results and analysis ........................................ 72
5.4.1 Maintenance test and diagnostic tests questionnaire results and analysis
(GIS) 72
5.4.2 Maintenance tests and diagnostic tests questionnaire results and analysis of
transformers ............................................................................................................ 73
5.5 Summary and recommendations for maintenance tests ................................... 75
5.5.1 GIS maintenance tests and diagnostic tests ................................................. 75
5.6.2 Transformer maintenance test and diagnostic tests..................................... 77
5.7 References ........................................................................................................... 80
6. SPECIAL VERIFICATION TESTS ................................................................................ 81
6.1 Artificial single-phase-to-ground fault tests and secondary arc extinction tests
for the Chinese 1000 kV project ................................................................................ 81
6.1.1 Artificial single-phase-to-ground fault tests on UHV Nanyang-Jingmen line.. 81
6.1.2 Artificial single-phase-to-ground fault tests on the UHV Changzhi-Nanyang
line 85
6.2 HSES field verification test and operation experience ........................................... 90
6.2.2 Design for 765 kV HSES in Korea .................................................................... 92
6.2.3 HSES Field Operation Experience.................................................................. 94
6.2.4 References..................................................................................................... 95
6.3 Bushing test concerning seismic performance ..................................................... 96
6.4 VFTO verification test (experiment study on VFTO test circuits on full scale UHV
GIS) 98
6.4.1 Introduction.................................................................................................... 98
6.4.2 VFTO test circuits of full scale UHV GIS ........................................................ 98
6.4.3 Test results................................................................................................ 100
6.4.4 Conclusions .................................................................................................. 105
6.5 GIS partial discharge verification test................................................................. 105
6.5.1 1100 kV GIS insulation level.......................................................................... 105
6.5.2 Procedure for Dielectric Testing................................................................. 106
6.5.3 Test diagram ............................................................................................. 107
6.5.4 Test results................................................................................................ 108
6.6 Discharge measurement using the UHF method for the 800 kV GIS for the
commissioning tests in Korea .................................................................................. 108
6.6.1 Basic noise measurement........................................................................... 108
6.6.2 Result of the tests during commissioning ..................................................... 110
6.6.3 Result of the tests during commercial operation........................................ 110
6.6.4 Conclusion................................................................................................. 111
6.7 Transformer special verification test (SGCC) ...................................................... 112
6.7.1 Purpose of the test .................................................................................... 112
6.7.2 Test Difficulties.......................................................................................... 112
6.7.3 Test scheme .............................................................................................. 112
6.7.4 Test equipment.......................................................................................... 113
6.7.5 Interference suppression ........................................................................... 114
6.7.6 Test result ................................................................................................. 115
6.8 Oil flow electrification at the TEPCO UHV equipment test site ........................ 116
6.9 References ......................................................................................................... 118
7 CONCLUSION ...................................................................................................119
7.1 Future standardization................................................................................... 119
7.2 On-site acceptance tests for UHV substations................................................ 119
7.3 Commissioning tests for UHV substations ..................................................... 119
7.4 Proposal for maintenance tests for UHV substations ...................................... 119
APPENDIX A - QUESTIONNAIRE RESULTS (ON-SITE ACCEPTANCE TESTS) ....................120
A-1 GIS .................................................................................................................... 120
A-2 Transformer...................................................................................................... 123
APPENDIX B QUESTIONNAIRE RESULTS (DIAGNOSTIC TESTS) ......................................126
B-1 GIS .................................................................................................................... 126
B-2 Transformer ...................................................................................................... 127
APPENDIX C SOME EXAMPLES OF MAINTENANCE TESTS .............................................129
C-1 GIS .................................................................................................................... 129
C-2 Transformer...................................................................................................... 134
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