基于CPCM的复转矩系数法在复杂电力系统SSR问题研究中的应用  

Application of Complex Torque Coefficient Basing on CPCM to SSR Study of Complex Power System

作　　者：朱鑫要[1] 孙海顺[1] 文劲宇[1] 王冠青[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》2013年第4期77-84,11,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：基于电力系统元件复频域端口导纳矩阵模型,采用分散消元的复转矩系数法,可方便地生成全系统复频域网络方程,有效降低计算复杂度;经适当处理后,可准确计及其他发电机组的轴系动态过程和其他转速控制元件的作用及其对被研究发电机组电气阻尼特性的影响。对某典型火电基地经串补输电系统的次同步谐振(subsynchronous resonance,SSR)特性及静止无功补偿器对SSR问题的抑制进行分析,并结合时域仿真验证分析结果的有效性。研究认为,在进行多机系统SSR问题复转矩系数分析时,需计及系统其它发电机组轴系动态和转速偏差对待研究机组阻尼特性的影响。同时,该方法可以根据网络结构的变化快速修改网络方程,以适应任意网络结构的次同步谐振分析,为研究复杂电力系统的SSR特性及抑制措施提供了有效手段。Based on complex frequency domain port-equivalence conductance matrix（CPCM） of system components,the network complex frequency domain equations were constructed conveniently by eliminating variables dispersedly in complex torque coefficient analysis.And the computation complexity could be reduced effectively.By proper processing,the influence on electrical damping could be analyzed accurately which were caused by shafts dynamic and other speed controlling components.The subsynchronous resonance（SSR） characteristics of a typical series compensated system and its damping effect by SVC were researched,and verified by time domain simulation.The research suggests that the dynamics and speed deviation of generator shafts must be taken into account.The proposed method modifies the network equations conveniently according to the change of network structure,which makes it adaptive for researching SSR of systems with arbitrary grid configurations.Consequently,the method is a useful approach to study SSR and its restraining measures in complex power systems.

关 键 词：次同步谐振 复杂电力系统 复转矩系数 复频域等效端口导纳矩阵 静止无功补偿器 

分 类 号：TM712[电气工程—电力系统及自动化] TM734