鉴于分布式光伏发电井网系统的电压稳定性对现实生话有重要意义.从下程角度给出380/220 V低压

配电网电压失稳的实用判抓.运用I SC 八I>软件构建了一个分布式光伏电源接入0. } kV配电网的3竹点系

统仿真模型.在此基础上分析了负荷增加、光照强度突降、环境温度增大以及负荷母线发生短路故障等扰动对

负荷电压稳定性的影响。仿真结果表明.当负荷电压接近电压稳定限定伯正常运行时.光照强度突降会使负

荷母线电压失去稳定:温度变化对负荷电压的影响甚微:短路故障消除后负荷母线电压则能够快速得到恢复.

不会导致电压失稳。-The voltage stability of distributed photovoltaic generation system has a significant role in actual life.　}hhc

practical criterion of voltage instability for the 38()一220 V low-voltage distribution network was discussed　the vicw-

point of engineering.　 hhe PSC 八I} software was used to build a()} kV 3-bus distributed network simulation model contai-

ning a grickconnected distributed photovoltaic power.　()n that basis.the influences on the load voltage stability were ana-

ly}ed by considering various disturbances, such as the growth of load·sudden reduction of light intensity, rise in environ-

mental temperature and the short circuit fault of the load bus.　Simulation results show that when the load voltage is ap-

proaching the limit of voltage stability, the sudden reduction of light intensity will make the load bus voltage lose stability

while the influence of temperature change is very tiny　the load bus voltage will recover the original value quickly after the

short circ