摘要
交流滤波器能降低直流融冰装置引起的谐波,但是交流滤波器合闸会引起较大的过电流。通过分析昆北换流站直流融冰装置交流滤波器频谱特性、电路特征及其暂态响应,指出交流滤波器中过电流大小与合闸角度相关,在过高电压瞬时值合闸情况下,合闸产生的过电流会达到数千安培,并提出采用分相合闸技术对交流滤波器合闸过电流进行抑制。仿真结果表明,分相合闸技术能在很大程度上抑制交流滤波器合闸过电流。
The AC filter can reduce the harmonics caused by the DC ice melting device,but the closing of the AC filter will cause a larger overcurrent.By analyzing the spectrum characteristics,circuit characteristics and transient response of the AC filter of the DC ice melting device of the Kunbei converter station,it is pointed out that the magnitude of the overcurrent in the AC filter is related to the closing angle.In the case of over-voltage instantaneous value closing,the overcurrent generated by closing will reach thousands of amperes.The phase separation closing technology is proposed to suppress the closing overcurrent of AC filter.The simulation results show that the split-phase closing technology can suppress the AC filter closing overcurrent to a large extent.
作者
郭康
鞠翔
王云龙
陈诺
黄美琴
GUO Kang;JU Xiang;WANG Yunlong;CHEN Nuo;HUANG Meiqin(Kunming Branch of EVC CSG,Kunming 650000,China;Kunming University of Science and Technology,Kunming 650500,China)
出处
《电工技术》
2022年第3期52-56,共5页
Electric Engineering
基金
云南省自然科学基金(编号202001AT070096)。
