一种构建网络状态空间模型的新方法及其在SSR研究中的应用  

A Novel Approach to Construct the State-space Model of Power System Grid and Its Application in SSR Study

作　　者：朱鑫要[1] 孙海顺[1] 陈萌[1] 文劲宇[1] 程时杰[1] 

机构地区：[1]强电磁工程与新技术国家重点实验室(华中科技大学),湖北省武汉市430074

出　　处：《中国电机工程学报》2014年第4期605-612,共8页Proceedings of the CSEE

基　　金：国家863高技术基金项目(2011AA05A119);国家电网公司大电网重大专项资助项目课题(SGCC-MPLG026-2012)~~

摘　　要：在总结输电网接线特点的基础上,给出网络部分状态变量的选取方法及电容支路动态导纳矩阵的定义,并提出一种形成电力系统网络状态空间模型的新方法。该方法无需通过复杂的拓扑分析生成网络常态树即可确定网络的状态变量,无需按照严格的规则对支路和节点进行编号,即可方便地生成网络状态空间模型,且在网络结构变化时网络状态空间模型修改容易,适于进行多机系统的次同步谐振(subsynchronous resonance,SSR)特征值分析。以国内某多机串补输电系统为例,利用文中所提方法分析了系统的SSR特性及静止无功补偿器对其SSR问题的抑制作用,并通过时域仿真验证了所提方法分析结果的有效性。该方法可为火电厂的系统接入方案规划以及SSR抑制措施的设计提供指导和理论支撑。The configuration feature of the transmission grid was summarized, then a method to choose state-variables of the grid was presented and the dynamic conductance matrix of capacitor branch was defined, and finally a novel method to construct the state-space model of the network was proposed. Without using the network normal tree to choose state-variables of the network, and without ranking the branches and nodes under strict rules, the method constructs the state-space model of the network conveniently, and the state-space model of the network modifies with the network change easily. That makes the method very effective to study subsynchronous resonance （SSR） of multi-machine power systems. SSR problem of a compensated multi-machine system and its damping by static var compensator （SVC） were studied by the proposed method, and the results were verified by time domain simulations. The method is supposed to be helpful for the planning of power plant integrating and the design of the countermeasure of SSR.

关 键 词：次同步谐振 特征值分析 电容支路动态导纳矩阵 多机电力系统 静止无功补偿器 

分 类 号：TM712[电气工程—电力系统及自动化] TM734