摘要
提出了遭受均衡扰动是同型机组的等值条件,基于均衡扰动同型机状态变量相关性发展了一种适合2组以上同型机系统等值的新方法。原同型机系统与等值后同型机系统的特征结构分析结果表明,遭受均衡扰动的同型机系统的模式可以分为冗余模式和公共模式,冗余模式相互抵消,对系统的动态过程不起作用,只有公共模式对系统动态过程起作用。文中给出的均衡扰动同型机等值方法保留了所有公共模式,消去了全部冗余模式。以我国的一个2组同型机的次同步谐振实际复杂系统为例,验证了所提理论和方法的正确性。
It is proposed in this paper that identical generators are subjected to uniform disturbances is the equivalence condition of identical generators,and based on the correlation of state variables of identical generators subjected to uniform disturbances a new equivalence method suitable to power system with more than two identical generators is developed.Eigenstructure analysis results of power system with original identical generators and those of power system with post-equivalence identical generators show that the modes of identical generators subjected to uniform disturbances can be divided into redundant modes and common modes.The redundant modes are cancelled out one another,so they do not impact on dynamic process in power system and only common modes impact on dynamic process in power system.In the proposed equivalence method of identical generators subjected to uniform disturbances all common modes are reserved when all redundant modes are eliminated.Taking an actual complex power system with two identical generators,in which subsynchronous resonance occurs,as the study case,the correctness of both proposed theory and method is verified.
出处
《电网技术》
EI
CSCD
北大核心
2012年第11期147-152,共6页
Power System Technology
基金
国家自然科学基金项目(51007032
51107054
51277089)
江苏省科技支撑计划项目(BE2011143)
江苏大学高级人才启动项目(11JDG027)的资助~~
关键词
动态电力系统
同型机组
次同步谐振
power system dynamics
identical generators
subsynchronous resonance
