集中布置型DSSC的交流线路故障穿越策略  

AC Fault Riding Through Strategy for DSSC With Centralized Installation

作　　者：林艺哲 潘磊[1] 马秀达 董云龙[1] LIN Yi-zhe;PAN Lei;MA Xiu-da;DONG Yun-long(NR Electric Co.,Ltd.,Nanjing 211102,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211102

出　　处：《电力电子技术》2022年第8期93-95,共3页Power Electronics

基　　金：南瑞集团有限公司科技项目(JS2001711)。

摘　　要：分布式静止串联补偿器(DSSC)是一种可改善电网潮流分布、提升线路传输能力的串联型补偿装置。当DSSC所在交流线路发生瞬时短路故障时,产生的故障电流会直接流经DSSC的功率模块。为避免故障电流损坏功率器件,采用了超快速故障闭锁策略,通过故障电流越限监测,在故障初期快速闭锁并旁路DSSC。在交流线路短路故障恢复后,为实现DSSC自动恢复初始运行状态,提出了故障重启策略,按照一定的顺序快速重启DSSC,并恢复故障前运行状态,从而实现交流线路故障穿越。进一步,在湖州DPFC示范工程中,通过实际开展交流线路单相瞬时短路故障试验,验证了上述故障穿越策略的可行性和有效性。Distributed static series compensator(DSSC)is a kind of series compensation device which can improve the power flow distribution in a grid or enhance the transmission capacity of AC lines.When DSSC transient short circuit fault occurs on the line,fault current will pass the DSSC power module directly.To avoid damage on the power module,ultrafast fault block strategy is applied.Fault current is observed and DSSC will be blocked and passed by immediately after fault.To realize DSSC automatic recovery of initial running state,a restart strategy is proposed,quickly restart the DSSC in a certain sequence and restore the running status before the fault.In this way,the AC line fault traversal is realized.Furthermore,the proposed strategy is applied on Huzhou DPFC project,and a single phase short current test is conducted to verify the feasibility and validity.

关 键 词：分布式静止串联补偿器 瞬时短路故障 故障穿越策略 

分 类 号：TN715.1[电子电信—电路与系统]