摘要
针对远距离大容量输电系统中出现的多机系统次同步振荡(SSO),分析了利用STATCOM附加电流的抑制策略,采用了模态解耦控制方法,详细介绍了控制器参数整定过程。在此基础上,建立了网络中各元件的端口等效导纳矩阵。采用分散消元的复转矩系数法,可以简化全系统复频域网络方程的生成,便于分析发电机组的等效电气阻尼特性。最后以此方法分析了某实际串补输电系统的SSO特性以及STATCOM对SSO问题的抑制效果。结果表明,该装置能够增加所有不稳定模态的电气阻尼,有效抑制次同步振荡,为系统中存在的多机多模态次同步振荡问题的解决提供了参考。
For the subsynchronous oscillation(SSO)of a multi-machine system in a long-distance and large-capacity transmission system,the suppression strategy using the additional current of STATCOM is analyzed.Modal decoupling control method is adopted,and the parameter setting process of the controller is decribed in detail.The port equivalent admittance matrix of each component in the network is established.The establishment of the complex frequency domain network equation of the whole system can be simplified by eliminating variables dispersedly in complex torque coefficient analysis,and it is convenient to analyze the equivalent electrical damping characteristics of the generator.Finally,the SSO characteristics of an actual series-compensated transmission system and the suppression effect of STATCOM on SSO problems are analyzed by this method.The results show the device can increase the electrical damping of all unstable modes and suppress subsynchronous oscillation effectively.This provides a reference for solving the SSO problems of multi-machine and multi-mode in the systems.
作者
毛俞杰
孙海顺
韩应生
吴思成
王东泽
朱廷猛
MAO Yujie;SUN Haishun;HAN Yingsheng;WU Sicheng;WANG Dongze;ZHU Tingmeng(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2022年第6期23-32,共10页
Power System Protection and Control
基金
国家重点研发计划项目资助(2017YFB0902002)。
关键词
次同步振荡
复转矩系数
复频域等效端口导纳模型
静止无功补偿器
静止同步补偿器
多机多模态
subsynchronous oscillation
complex torque coefficient
complex frequency domain port-equivalence conductance matrix(CPCM)
static var compensator
static synchronous compensator
multi-machine and multi-mode
