相间功率控制器过电压及其保护的仿真分析  

Analysis on the Simulation of Interphase Power Controller Over-voltage and Its Protection

作　　者：李娟[1] 郑明[1] 张乐斌[2] 陈继军[3] 

机构地区：[1]东北电力大学电气工程学院,吉林132012 [2]衡水供电公司,衡水053000 [3]池州供电公司,池州247100

出　　处：《高电压技术》2011年第1期50-56,共7页High Voltage Engineering

基　　金：吉林省教育厅科研规划项目(200618)~~

摘　　要：针对相间功率控制器(interphase power controller,IPC)在潮流控制过程中过电压及其保护的问题,基于相间功率控制器的基本结构原理,建立了电压与元件参数之间关系的数学模型,探讨了IPC过电压出现的原因及其保护系统的组成,并以两电网带IPC 240联络线为例采用Matlab中的Simulink搭建了仿真模型,进行了各种运行状态下的过电压及其保护的仿真分析。结果表明:正常运行时调节IPC的参数超过一定的范围会引起过电压;IPC端口开路时产生的谐振过电压是各种运行状态下最严重的;由于受断路器动作的影响,单相接地短路故障引起暂态过电压是各种短路故障中最严重的。在各种运行状态的过电压保护仿真中,IPC端口并联氧化物限压器(metal oxide varistors,MOV)及IPC电容、电感元件两端并联带触发间隙和旁路开关的MOV与断路器配合均能起到有效的过电压保护作用,严重情况下MOV并联的间隙电路被触发后能保护MOV。The problem of over-voltage and its protection of interphase power controller（IPC） during controlling power flow were analyzed.A mathematical model of relationship between voltage and component parameters was established based on the basic theory of IPC construction,then the reasons of over-voltage and protection component were discussed.The simulation model of two networks with IPC 240 tie-line was established to analyze the problem using the Simulink model of MATLAB.The results show that over-voltage may be caused if adjusting the parameters of IPC beyond the certain scope,the resonance over-voltage values are maximal with IPC port opening,and the most severe transient over-voltage occurs on single phase to ground for action of breakers.Consequently,metal oxide varistors（MOV） are installed at the IPC port,and IPC capacitive and inductive branch are combined with circuit breakers parallel MOV with a triggered gap and bypass circuit breaker,then over-voltage values are effectively reduced in different operation states by MOV and breakers coordinated action.The gap is triggered to protect MOV when the energy in the arresters exceeds a predetermined value.

关 键 词：相间功率控制器(IPC) 过电压 过电压保护 氧化物限压器(MOV) 触发间隙 旁路开关 仿真分析 

分 类 号：TM761[电气工程—电力系统及自动化]