负荷特性对电力系统电压稳定性的影响  

Effect of Load Characteristics on Voltage Stability of Power System

作　　者：宋海明 SONG Haiming(Fujian Sanbao Iron&Steel Co.,Ltd.,Zhangzhou,Fujian 363000,China)

机构地区：[1]福建三宝钢铁有限公司,福建漳州363000

出　　处：《自动化应用》2023年第5期212-214,共3页Automation Application

摘　　要：本文通过MATLAB仿真平台构建的电力系统负荷模型,研究不同扰动状态对电力系统电压稳定性的影响,在所得结果的基础上,分析电压失稳、电压崩溃与负荷失稳之间的联系。小扰动状态下电压稳定性测试结果:当感应电动机负荷运行电压低于极限电压值时,对电压稳定性的影响较大,甚至会导致电力系统的崩溃;大扰动状态下电压稳定性测试结果为:当故障切除时间未超过0.4 s时,电力系统的电压处在稳定状态。由此可见,需要使负荷电压高于极限电压值且及时消除故障,才能让电力系统的电压处于稳定阶段,否则会出现电压失衡的情况。Through the load model of the power system constructed by the MATLAB simulation platform,this paper studies the influence of different disturbance states on the voltage stability of the power system,and analyzes the connection between voltage instability,voltage collapse and load instability on the basis of the obtained results.According to the test results,the voltage stability test result under the small disturbance state is:when the operating voltage of the induction motor load is lower than the limit voltage value,it has a great impact on the voltage stability,and even will lead to the collapse of the power system.The voltage stability test result under large disturbance state is:when the fault resection time is less than 0.4 s,the voltage of the power system is in the stable state.Thus,it is necessary to meet the requirement that the load voltage is higher than the extreme value and the fault is eliminated in time,so that the power system voltage can be in the stable stage,otherwise there will be a voltage imbalance.

关 键 词：负荷特性 电力系统 电压 稳定性 

分 类 号：TM732[电气工程—电力系统及自动化]