应用分岔理论研究感应电动机对电压稳定的影响
The Influence of Induction Motor on Voltage Stability of Power System Based on Bifurcation Theory
蒋凌云 1马隽 1邵峥达1
作者信息
- 1. 国网上海市电力公司市区供电公司,上海200080
- 折叠
摘要
电压过低将不能满足用户对电能质量的要求,同时还可能引起电力系统的连锁故障.指出负荷组成中感应电动机负荷成分较多时,会对电压稳定造成不利影响,所以研究电动机负荷与临界失稳电压之间的关系,将有助于对电压稳定进行控制.在单机单负荷系统中,建立了基于潮流方程的感应电动机模型,应用分岔理论,从电压失稳的机理角度出发推导出临界失稳电压的表达式,研究感应电动机关键参数与临界失稳电压的关系,并给出它们之间的关系曲线.
Abstract
Voltage stability means much to power system.Users can not be satisfied with low voltage for requests of power quality.Meanwhile,low voltage may cause cascading failures.If there are factors which can cause voltage collapse,measures should be taken as soon as possible,in case of big damages to power system.The voltage may be instable when there are many induction motors,so researching relationships between induction motors and critical instable voltage may do a favor to control stability of voltage.A model of induction motor based on power flow equations in a single motor and single load system is built in this paper.From the view of voltage instability mechanism,the expression of critical instable voltage is derived based on bifurcation theory.The relationships between key parameters in induction motors and critical instable voltage are researched,and curves of those relationships are showed.
关键词
电力系统/分岔理论/电压稳定/感应电动机Key words
bifurcation theory/voltage stability/induction motor引用本文复制引用
出版年
2014
NETL
NSTL
万方数据