Air Clearance Calculation and Compacting Layout Design of Valve Hall in Converter Station of VSC-HVDC Grid with High Voltage and Large Capacity

doi:10.11930/j.issn.1004-9649.202004220

Abstract

Abstract: The high voltage and large capacity VSC-HVDC grid project has significant difference in valve hall air gap and space layout from the previous one due to its installation of DC circuit breakers. According to the characteristics of high voltage and large capacity VSC-HVDC system, a study is made on the air clearance calculation and compacting layout design of valve hall. The g-parameter method is used to correct the discharge characteristics of air gap under non-standard meteorological conditions, and a method is given for obtaining the temperature and humidity of the valve hall at the maximum air clearance; a method is proposed for compacting layout design of high voltage and large capacity valve hall with DC circuit breakers. Taking Zhangbei converter station of Zhangbei ±500 kV VSC-HVDC demonstration project as an example, the temperature and humidity conditions for calculating air clearance of valve hall were corrected, and the air clearance values were obtained. A comparative analysis of the valve hall layout schemes show that under the condition for meeting the requirements of air clearance and maintenance space, the proposed compacting design method can significantly reduce the valve hall size.

Key words: VSC-HVDC grid, converter station valve hall, air clearance, g-parameter method, converter valve, DC circuit breaker, compacting layout design

FU Shouqiang, ZHANG Libin, LI Hongjian, CHEN Xiangyu, GAO Yang, CHEN Lei. Air Clearance Calculation and Compacting Layout Design of Valve Hall in Converter Station of VSC-HVDC Grid with High Voltage and Large Capacity[J]. Electric Power, 2021, 54(1): 10-18.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202004220

https://www.electricpower.com.cn/EN/Y2021/V54/I1/10

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