摘要
随着大区电网的互联,低频振荡在我国电力系统中已成为突出的问题。本文研究电力系统的负荷模型对电力系统动态稳定的影响。通过搭建单机无穷大系统,理论上研究送端负荷分别采用恒功率,恒电流及恒阻抗模型时,分析其与自动电压调节器及电力系统稳定器的相互作用对电力系统动态稳定的影响。通过对一个两区域四机系统的典型实例,利用PSD-BPA4.0版中小扰动程序对其进行仿真研究分析,结果表明,当电力系统进安装AVR的情况下,送端负荷采用恒功率模型,更有利于系统的稳定;当系统安装PSS的情况下,送端采用恒阻抗模型更有利于系统稳定。
This paper researches on effects of load model on dynamic stability in power system.Through constructing single-machine-infinite-bus system,interactions among different load models,automatic voltage regulator（AVR） and power system stabilizer（PSS） on dynamic stability of the power system are analyzed with sending-end loads using models of constant power,constant current and constant impedance.A typical two-area-four-machine system is used as the case study by using small perturbations program of PSD-BPA4.0.The results show that when the power system installs AVR,the sending-end loads with constant power model are helpful to the stability of the system,and when the system installs PSS,the sending-end loads with constant impedance model are helpful to the stability of system.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2011年第1期118-122,共5页
Proceedings of the CSU-EPSA
关键词
负荷模型
动态稳定
自动电压调节器
电力系统稳定器
load model
dynamic stability
automatic voltage regulation（AVR）
power system stabilizer（PSS）
