电网技术2012，Vol.36Issue(12)：39-43,5.
±1100kV特高压直流换流阀试验用高压直流串级发生器的绝缘耐压分析
Analysis on Dielectric Withstand Cascaded DC High-Voltage Generator for ±1100 kV UHVDC Converter Valve Test
摘要
Abstract
To make the dielectric test on ±1 100 kV UHVDC converter valve in laboratory environment, it is necessary to analyze whether the dielectric withstand of cascaded DC high-voltage (HV) generator used in the test can be met. Based on the principle of the cascaded DC HV generator, its topological model is established by ANSOFT SIMPLORER, and above earth potentials at different positions of metal shield cases of silicon rectifier stacks and those at the tops of insulative posts of the HV generator are obtained; the three-dimensional simulation analysis on the distribution of electric field strength of the generator is performed by FEM software ANSOFT MAXWELL. Simulation results show that the maximum electric field strength around the HV generator is 22.62 kV/cm that is close to 25 kV/cm, the breakdown field strength of air, and such a result conforms to the case that the air gap between the top of the HV generator and the top steel beam of the laboratory was broken down while the output of the HV generator was 1 843 kV. To decrease the electric field strength in the air, optimization analysis on HV generator is performed and the result shows that the maximum electric field strength should be 20.66 kV/cm that is lower than the breakdown field strength of air. Therefore, without considering the impacts of humidity and temperature of air, it is feasible to conduct the dielectric withstand test of ±1 100 kV UHVDC converter valve under existing laboratory condition.关键词
±1100kV/直流试验装置/高压直流串级发生器/绝缘耐压/电场强度Key words
±1 100 kV/ DC test equipment/ cascaded DC high-voltage generator/ dielectric withstand/ electric field strength分类
信息技术与安全科学引用本文复制引用
顾灶根,周军川,温传新,温家良..±1100kV特高压直流换流阀试验用高压直流串级发生器的绝缘耐压分析[J].电网技术,2012,36(12):39-43,5.基金项目
国家863高技术基金项目(2012AA052702) （2012AA052702）
国家科技重大专项项目(2011ZX02603). （2011ZX02603）
