摘要
目前中国正在规划设计的首个±1100 kV特高压直流输电工程的整流侧拟采用750 kV交流系统供电,由于特高压直流系统的工作特点,在整流侧750 kV交流系统预配置大容量的滤波、无功补偿装置,因该装置持续工作电压高、容量大,因此必须对750 kV滤波、无功补偿装置分合闸操作中断路器的电负荷以及无功分组容量对断路器电负荷的影响进行研究。笔者以该工程为背景,利用EMTDC/PSCAD程序研究了整流侧750 kV交流滤波器用断路器在多种不同工况下的开断负荷。计算分析了不同运行方式、不同工况下切除交流滤波器时断路器的开断电流、断口恢复电压等,研究了交流滤波器不同分组容量下断路器的开断负荷特性,计算结果可为该直流系统整流站滤波器的分组设计和断路器选型提供参考依据。
At present, the first ＋1 100 kV UHVDC project is being planned and designed in China. Its rectifier side is planned to be supplied by 750 kV AC system, and has filtering and reactive compensation device with large capacity. Due to the characteristics of HVDC transmission system, the rectifier AC 750 kV system should be pre- configured for large capacity filter, reactive power compensation device. The operational voltage of device is high, and its capacity is large, so, for AC 750 kV filter and reactive power compensation device, it is necessary to study on the CB power load during switching operation, and the effect of reactive group capacity on CB power load. This paper mainly studied the CB power load under different operating condition with the EMTDC/PSCAD. It calculated the breaking current and recovery voltage under different operating condition and researched the breaking characteristic of circuit breaker with different reactive compensation. The research results provide some references for the filter grouping and circuit breaker selection.
出处
《高压电器》
CAS
CSCD
北大核心
2014年第11期45-50,共6页
High Voltage Apparatus
关键词
交流滤波器
断路器
开断电流
断口恢复电压
无功容量
AC filter
circuit breaker（CB）
breaking current
recovery voltage
reactive capacity
