多虚拟同步发电机接入对电力系统机电振荡模式的影响  

Influence of Multi Virtual Synchronous Generators on Power System Electromechanical Oscillation Mode

作　　者：付强[1] 杜文娟[1] 王海风[1] FU Qiang;DU Wenjuan;WANG Haifeng(State Key laboratory of Alternate Electric Power Systems With New Energy Resources（North China Electric Power University）,Changping District,Beijing 102206,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学)

出　　处：《中国电机工程学报》2018年第19期5615-5624,共10页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2016YFB0900602)~~

摘　　要：以多个虚拟同步发电机（virtual synchronous generator,VSG）控制的电压源型换流站接入交流系统为研究对象,建立含多个VSG的闭环系统线性化互联模型,分析多个VSG接入对电力系统机电振荡模式的影响,包括VSG接入对发电机机电振荡模式的影响和VSG接入对另一个VSG机电振荡模式的影响。采用阻尼转矩分析法揭示多个VSG接入对电力系统机电振荡模式的影响机理,并进行理论验证,得出：当VSG控制子系统的开环模式与交流子系统的机电振荡模式或者与另一个VSG控制子系统的开环模式接近时,子系统间将产生强动态交互过程,导致闭环模式相互排斥,降低系统机电振荡模式的阻尼甚至引发机电振荡。最后,对多个VSG接入的交流系统进行非线性仿真,验证上述结论,给出参数设定建议。The closed-loop linear model of AC system with multiple voltage source converters （VSC） controlled by virtual synchronous generator （VSG） was established in this paper. The effect of multi virtual synchronous generators on the electromechanical oscillation mode of generator and another VSG was analyzed respectively, which mechanism was explained by damping torque analysis and proofed theoretically. The result shows that the strong dynamic and mode exclusion between subsystems will happen and lead to weak damping or electromechanical oscillation when the open-loop mode of VSG control subsystem is closed to the open-loop mode of AC subsystem or another VSG control. Finally, the nonlinear simulation of AC system with VSGs was carried out and verified the above results, based on this, a simple parameter adjustment method was proposed and related suggestions were given.

关 键 词：虚拟同步发电机 电压源型换流站 阻尼转矩分析法 机电振荡 

分 类 号：TM73[电气工程—电力系统及自动化]