500 kV高耦合分裂电抗限流器过电压抑制方法研究  

Study on Overvoltage Suppression Method for 500 kV High Coupling Split Reactance Current Limiter

作　　者：朱璐 王杉 刘俊翔 赵虎[2] 张显聪 莫文雄 乔胜亚 ZHU Lu;WANG Shan;LIU Junxiang;ZHAO Hu;ZHANG Xiancong;MO Wenxiong;QIAO Shengya(Electric Power Test Research Institute of Guangzhou Power Supply Bureau Co.,Ltd.,Guangzhou 510410,China;School of Automation,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]广州供电局有限公司电力试验研究院,广州510410 [2]西北工业大学自动化学院,西安710072

出　　处：《高压电器》2021年第11期108-115,123,共9页High Voltage Apparatus

基　　金：国家重点研发计划(2018YFB0904300);中国南方电网公司科技项目(GZHKJXM20180055)。

摘　　要：高耦合分裂电抗限流器(HCSR)具有良好的经济性和广泛的适用性,在高压、超高压领域受到关注。然而,电力系统在引入高耦合分裂电抗限流器后,其工作过程会涉及电流的转移和主断路器回路短时串入限流器电感等过程,可能引起较高的过电压。基于此,文中针对500 kV系统在90 kA短路电流等级的典型场景下,计算分析不同短路故障工况下引入限流器的过电压情况,对比分析不同过电压保护方案对主断路器及真空快速断路器TRV幅值与陡度的抑制效果。结果表明,在限流器模块两端并联电容的基础上对两串联真空快速断路器并联电容或阻容,均可进一步明显降低主断路器的TRV陡度和幅值,且并联电容对陡度抑制效果更有效,而并联阻容对抑制幅值效果更显著,研究结果可为限流器的过电压保护方案及参数选取提供依据。High Coupling Split Reactance(HCSR)current limiter has good economy and wide applicability and has attracted attention in the field of high-voltage and ultra-high voltage.However,after the introduction of the HCSR current limiter in the power system,its operation process can involve such process as current commutation and the short time introduction of inductance of current limiter into the circuit of the main circuit breaker,which may cause a higher overvoltage.Based on this and in view of such typical scenario as 90 kA short circuit current of 500 kV system,the overvoltage situation of introduced current limiter under different short circuit faults is analyzed and calculated.The suppression result of different over voltage protection schemes to the TRV amplitude and steepness of the main circuit breaker and vacuum fast circuit breaker is compared and analyzed.The results show that,on the basis of parallel capacitance of both ends of the current limiter,the capacitance or resistive capacitance in parallel to the two series vacuum fast circuit breaker can reduce remarkably the steepness and amplitude of TRV of the main circuit breaker,the suppression result of the parallel capacitance to the steepness is more efficient and the suppression result of the parallel resistive capacitance to the amplitude is more remarkable.The research result can provide a basis for the overvoltage protection scheme and parameter selection of the current limiter.

关 键 词：HCSR 限流器 过电压 恢复电压 500 kV 

分 类 号：TM471[电气工程—电器]