串联补偿型限流器的设计与仿真

Design and Simulation of Fault Current Limiter with Series Compensation

针对10 kV配电网系统,研究了一种串联补偿型故障限流器,该限流器由主回路串联的电容电感、与电容并联的金属氧化物避雷器、阻尼回路、反并联晶闸管以及旁路开关组成。在正常工作时它可以对线路进行无功补偿,改善功率因素;在短路故障时能够起到限制短路电流的作用。首先建立了10 kV配电网仿真模型,根据限流器的限流系数设计了该限流器的拓扑结构。通过Matlab/Simulink模型仿真的方法,对该限流器的工作原理和限流过程进行了描述,给出了限流器中各个器件参数的设计与选型过程,特别是获得了阻尼回路器件参数对限流特性的影响规律。研究表明该限流器在系统中可以起到明显的限流作用,并且易于实现工程应用。

A type of fault current limiter with series compensation is studied for lOkV distribution network system, which is composed of main circuit capacitor in series inductance, metal oxide surge arresters in parallel with the ca- pacitor, damping loop, anti-parallel thyristors and bypass switch. It can compensate the reactive power of the line in normal state, while it can limit the fault current when fault occurs. Firstly, this paper builds the simulation model for lOkV distribution network and designs the topology of the fault current limiter based on its limiting factors. Then, based on the Matlab/Simulink simulation, its working mechanism and limiting process are described, and the detailed process for the design and selection of various device parameters is presented; particularly, the influence rule of damping loop device parameters on current limiting characteristics is acquired. It is conclude that the fault current limiter can play a significant role of limiting the fault current, and it is easy to implement its application in engineering.