摘要
针对安装故障限流器的架空式辐射状10kV配电系统,利用MATLAB详细分析了ZnO避雷器式故障限流器对配电网安全运行和电能质量的影响。研究了系统发生短路故障时,故障限流器不同限流比对母线电压跌落以及各支路电流的影响;分析了系统正常运行时,不同限流比对电流中高次谐波含有率和畸变率的影响。仿真分析表明:ZnO避雷器式故障限流器应用于配电网,能够有效地减少系统故障时的短路电流和电压跌落,在系统正常运行的情况下,也能明显阻碍线路中高次谐波的传递。
With regard to a 10 kV radialized distribution network installed with Zinc oxide surge arrester （MOA） based Fault Current Limiter （FCL）, the influence of the FCLs on safety operation and power quality was in detail analyzed by MATLAB simulations. The impact of different current limit factors on voltage sags of bus line and the current of branch circuits during a three-phase fault was investigated. It was presented the change of the harmonic ratio and total harmonic distortion with different current limit factors at normal conditions. Simulation results show that the installation of MOA-based FCLs in distribution network not only can limit the fault current and reduce the voltage sags when a fault occurs but also can restrain the transfer of high-frequency harmonics in normal situation.
出处
《中国电力》
CSCD
北大核心
2008年第5期70-74,共5页
Electric Power
基金
山东省自然科学基金资助项目(Q2004F03)
山东省中青年科学家基金资助项目(2005BS01011)
关键词
Zn0避雷器式故障限流器
配电网
电压跌落
高次谐波
ZnO surge arrester based FCL
distribution network
voltage sags
high-frequency harmonics
