PREFACE SUMMARY
UHV AC Power Transmission Technology 001
1.1Overview 002
1.1.1International Exploration 002
1.1.2Development in China 005
1.2Technology Innovation 008
1.2.1Key Technologies on System Research 008
1.2.2Key Technologies on Overvoltage and External Insulation 012
1.2.3Key Technologies on Electromagnetic Environment 023
1.2.4Key Equipment Research and Development Technology 035
1.2.5Complete Set of System Integration Technology 042
1.3Core Equipment 043
1.3.1Transformer 043
1.3.2 GIS 045
1.3.3Circuit Breaker 048
1.3.4Isolating Switch 049
1.3.5Lightning Arrester 052
1.3.6Post Insulator 054
1.3.7Bushing 054
1.3.8Voltage Transformer 056
1.3.9Current Transformer 058
1.3.10Tower 060
1.3.11Conductor 063
1.3.12Insulator 066
1.4Test System 070
1.5Standard System 074
1.6Typical Projects 076
1.6.1Southeast Shanxi?CNanyang?CJingmen 1000 kV Pilot and
Demonstration Project 076
1.6.2Huainan-Shanghai 1000 kV Project 077
1.6.3Mengxi-South Tianjin 1000 kV Project 078
1.6.4Yuheng-Weifang 1000 kV Project 078
1.6.5Sutong 1000 kV GIL Comprehensive Pipe Gallery Project 079
1.6.6Shandong-Hebei 1000 kV Project 080
1.7Technical Outlook 082
1.7.1UHV Switchgear for Special Applications 082
1.7.2UHV Circuit Breaker with Long Electrical Life and Large Capacity 082
1.7.3UHV Transformer with Key Performance Parameters Monitored 083
1.7.4UHV AC High-performance Overvoltage Limiter 084
1.7.5Environment-Friendly UHV AC Gas-Insulated Transmission
Line GIL Power Transmission 085
1.8Economic Outlook 086
UHV DC Power Transmission Technology 087
2.1Overview 088
2.1.1International Exploration 088
2.1.2Practice in China 089
2.2Technological Innovation 092
2.2.1Key ±800 kV Technologies 092
2.2.2Key ±1100 kV Technologies 095
2.2.3Development of Key Equipment 097
2.2.4Line Related Equipment 106
2.2.5Innovative Hierarchical Connection Mode 108
2.3Core Equipment 112
2.3.1DC Converter Valve 112
2.3.2Converter Transformer 117
2.3.3Smoothing Reactor 119
2.3.4Converter Station Filter 121
2.3.5Lightning Arrester for Converter Station 128
2.4Test System 133
2.5Standard System 139
2.6Typical Projects 140
2.6.1Xiangjiaba-Shanghai ±800 kV UHV DC Transmission
Demonstration Project 140
2.6.2Xilingol League-Taizhou ±800 kV Transmission Project 141
2.6.3Qinghai-Henan ±800 kV Transmission Project 142
2.6.4Belo Monte ±800 kV Transmission Project in Brazil 143
2.6.5Zhundong-Wannan ±1100 kV DC Transmission Project 144
2.7Technology Outlook 145
2.7.1±1500 kV20 GW DC Power Transmission Equipment 145
2.7.2UHV DC Controllable Lightning Arrester 146
2.7.3UHV Hybrid DC Power Transmission Control and Protection 146
2.7.4UHV DC cable 147
2.7.5UHV DC Power Transmission Equipment for Extreme
Environments 148
2.8Economic Outlook 149
Flexible Transmission Technology 151
3.1Flexible AC transmission system technology 152
3.1.1Overview 152
3.1.2Core Technology and Equipment 156
3.1.3Typical Projects 164
3.1.4Technology Outlook 168
3.1.5Economic Outlook 169
3.2VSC HVDC transmission technology 171
3.2.1Overview 171
3.2.2Core Technology and Equipment 175
3.2.3Typical Projects 192
3.2.4Technology Outlook 197
3.2.5Economic Outlook 199
EPILOGUE 201
Appendix 1Key Technical Parameters of UHV Project 202
Appendix 2 AbbreviationsDefinitions 208
內容試閱：
With the continuous consumption of fossil energy, increasingly severe climate change and worsening environment pollution, thehuman being hasputforward higher requirements for reliable, environmentally friendly and sustainable energy, bringing global energy interconnection into being. The core of sustainable development is clean development. UHV transmission technology is critical for the reliable and efficient delivery of clean energy, and it is of great significance to promote its global allocation.After a century of development, the transmission technology of power system has made great progress in terms of voltage level, transmission capacity anddistance.AsforUHV AC power transmission technology, UHV DC transmission technology, flexible AC and VSC DC transmission technology, their respective voltage and transmission capacity have exceeded 1000 kV5000 MVA, ±1100 kV12000 MW and ±800 kV5000 MW. Flexible AC transmission technology has started to beapplied in1000 kVprojects. Thedevelopment of UHV power transmission technology provides a strong support for the world’s large- scale energy development and long-distance transmission, facilitates a large-scale optimization of energy allocation, and greatly improves the reliability and economic efficiency of power supply in human society.UHV power transmission technology will see a broader development space and application market in the construction of global energy interconnection GEI. UHV power transmission technology can make it possible for thousands of kilometers and 10 GW power transmission and cross-border and transcontinental grid interconnection, while VSC HVDC transmission technology can enhance the flexibility of system operation, meet the friendly interconnection of clean energy such as photovoltaic and wind power and support their flexible configuration. The two technologies are of great significance to enhancing the system stability, ensuring the wide access, transmission and consumption of clean energy and improving the flexibility and reliability of power grid operation.Since GEI involves the development of different types and scales of clean energy, the power transmission of different capacities and distances and the intensive interconnection of power grid with different characteristics and development levels, it raises higher requirements for UHV power transmission technology. During the construction of GEI, it will be characterized by higher clean energy proportion at the power source side, larger clean energy base scale, longer transmission distance, more complex grid topology and environment, and higher requirements for reliable, flexible and affordable power supply. Therefore, to further enhance the power transmission capability of UHV AC and flexible power transmission technologies and extend their scope of application, improve their stability, security, flexibility and grid-integration strategies and reduce the power transmission cost is an important development trend for power transmission technologies.In view of this, the report summarized the current situation, main technological innovation and engineering practice of current UHV ACDC power transmission technologies and flexible ACDC power transmission technology. Combined with the technical demand for large- capacity and long-distance clean energy transmission and more reliable and flexible interconnection, the development trend of various technologies were further prospected, to provide reference for the industrial development.The report is composed of three sections, which separately introduce the development history and current situation, technological innovation, core equipment, test system, typical projects and development prospect of UHV AC, UHV DC and flexible power transmission technologies.GEI is the optimal scheme for optimizing the allocation of clean energy and solving such complex problems as global energy dilemma and climate change, while UHV power transmission technology will be an important guarantee for achieving this grandgoal, with broad development space and application prospect. The research results will play a positive role in promoting the research and development of advanced power transmission technologies and key facilities, improving the efficiency of clean energy development and delivery, promoting the progress of power industry and supporting grid interconnection on a larger scale.
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