10kV无功补偿电容器分相合闸策略研究
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摘要
在江门某变电站,搭建10kV无功补偿电容器分相投切实验系统。断路器采用随机合闸策略,无功补偿电容器最大暂态过电压为稳态运行的1.6倍左右,最大暂态过电流为稳态运行的3.7倍左右,暂态持续时间约为170 ms;而采用分相合闸策略,无功补偿电容器最大暂态过电压不会超过稳态运行的1.3倍,最大暂态过电流不会超过稳态运行的2倍,暂态持续时间约为130 ms。采用分相合闸策略能够有效减小电容器合闸过电压和合闸涌流,减少暂态持续时间,从而提高电容器运行的安全性与可靠性。
The phase switching experimental system of 10kV reactive compensation capacitor is set up at certain substation in Jiangmen.The random closing strategy is adopted in the circuit breaker,the maximum transient overvoltage of reactive compensation capacitor is about 1.6 times that of steady operation,the maximum transient overcurrent is about 3.7 times that of steady operation and the transient duration is about 170 ms.However,in case of adopting phase closing strategy,the maximum transient overvoltage of reactive compensation capacitor will not exceed 1.3 times that of steady operation,the maximum transient overcurrent will not exceed twice that of steady operation and the transient duration is about 130 ms.The use of phase closing strategy can reduce effectively the closing overvoltage and the closing inrush current of the capacitor,reduce the transient duration,thus improving the safe and reliable operation of the capacitor.
The phase switching experimental system of 10kV reactive compensation capacitor is set up at certain substation in Jiangmen.The random closing strategy is adopted in the circuit breaker,the maximum transient overvoltage of reactive compensation capacitor is about 1.6 times that of steady operation,the maximum transient overcurrent is about 3.7 times that of steady operation and the transient duration is about 170 ms.However,in case of adopting phase closing strategy,the maximum transient overvoltage of reactive compensation capacitor will not exceed 1.3 times that of steady operation,the maximum transient overcurrent will not exceed twice that of steady operation and the transient duration is about 130 ms.The use of phase closing strategy can reduce effectively the closing overvoltage and the closing inrush current of the capacitor,reduce the transient duration,thus improving the safe and reliable operation of the capacitor.
引文
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[3]张越.一例10kV并联电容器装置故障的分析与建议[J].中国设备工程,2016(7):69-70.ZHANG Yue. Analysis and suggestion of a 10kV shunt capacitor fault[J]. China Plant Engineering,2016(7):69-70.
[4]魏旭,周志成,谢天喜,等.真空断路器投入并联电容器的过电压分析及防护[J].高电压技术,2014,40(10):3193-3198.WEI Xu,ZHOU Zhicheng,XIE Tianxi,et al. Analysis and protection against overvoltages caused by vacuum circuit breakers switching on shunt capacitors[J]. High Voltage Engineering,2014,40(10):3193-3198.
[5]席世友.真空断路器电容器回路故障原因分析[J].高压电器,2010,46(5):65-69.XI Shiyou. Cause analysis of capacitor circuit of vacuum circuit breaker fault[J]. High Voltage Apparatus,2010,46(5):65-69.
[6]杨庆,欧阳沙,司马文霞,等.真空断路器快速合-分闸操作10kV并联电容器的过电压机理[J].高电压技术,2014,40(10):3135-3140.YANG Qing,OUYANG Sha,SIMA Wenxia,et al. Analysis about overvoltage mechanism of fast switching on-off 10kV shunt capacitors for vacuum circuit breakers[J]. High Voltage Engineering,2014,40(10):3135-3140.
[7]周胜军,林海雪.并联电容器装置参数的工程选择计算[J].供用电,2009,26(4):9-14.ZHOU Shengjun,LIN Haixue. Engineering choose and calculation parameters for installation of shunt capacitor[J].Distribution&Utilization,2009,26(4):9-14.
[8]陈世青,赵新尚,李福祥.防止并联电容器运行中产生谐波放大[J].高电压技术,2004,30(12):19-22.CHEN Shiqing,ZHAO Xinshang,LI Fuxiang. Prevention of harmonic amplification in operation of parallel capacitor[J]. High Voltage Engineering,2004,30(12):19-22.
[9]陈伯胜.串联电抗器抑制谐波的作用及电抗率的选择[J].电网技术,2003,27(12):92-95.CHEN Baisheng. Harmonics restraining function of serial reactor and selection of reactance rate[J]. Power System Technology,2003,27(12):92-95.
[10]欧阳沙.投切10kV并联电容器的暂态过程研究[D].重庆:重庆大学,2014.
[11]段雄英,廖敏夫,丁富华,等.基于真空断路器的并联电容器组相控投切装置[J].电工技术学报,2007,22(10):78-84.DUAN Xiongying,LIAO Minfu,DING Fuhua,et al. Controlled vacuum circuit breaker for shunt capacitor banks[J].Transactions of China Electrotechnical Society,2007,22(10):78-84.
[12]杨庆,张照辉,席世友,等.相控断路器投切10kV并联电容器的应用[J].高电压技术,2016,42(6):1739-1745.YANG Qing,ZHANG Zhaohui,XI Shiyou,et al. Application of 10kV switching shunt capacitor banks with controlled vacuum circuit breakers[J]. High Voltage Engineering,2016,42(6):1739-1745.