摘要
根据IEC60700-1中对最小关断角试验的要求,设计了换流阀最小关断角合成试验回路和试验方法,通过改变辅助阀的控制时序来解决因恢复电压过低而导致合成试验回路不能正常工作的问题。以额定电压±800 kV、额定电流6 250 A的换流阀为试品进行最小关断角试验,得出:换流阀电流6 693 A,最小关断时间468μs,换流阀电压和电流波形与实际运行工况的波形接近。试验结果表明所设计的试验回路和试验方法可以满足IEC60700-1的要求和实际工程的需要。
According to requirements for test on the minimum extinction angle in IEC 60tett circuit and method. By means of changing control time sequence of the auxiliary valve, this lem of failure in proper functioning of synthetic circuit caused by low recovery voltage. Taking the converter valve with ＋ 800 kV rated voltage and 6 250 rated current as a test sample for minimum extinction angle test , it draws following conclu-sions that current of the converter valve is 6 693 A , the minimum off-time is 468μs and waveforms of voltage and current are close to actual operating waveforms. Test results indicate the designed test circuit and method can meet requirements of IEC 60700-1 and actual engineering.
出处
《广东电力》
2017年第11期90-93,共4页
Guangdong Electric Power
基金
河南省重大科技项目(141100210100)
关键词
换流阀
关断角
合成试验
converter valve
extinction angle
synthetic test
