虚拟同步发电机接入电力系统的阻尼转矩分析  

Damping torque analysis of virtual synchronous generator connected to power system

作　　者：马燕峰[1] 郑力文 霍亚欣 林子健 赵书强[1] MA Yanfeng;ZHENG Liwen;HUO Yaxin;LIN Zijian;ZHAO Shuqiang(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Baoding 071003,China;Foshan Power Supply Bureau of China Southern Power Grid Corporation,Foshan 528000,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,河北保定071003 [2]中国南方电网公司佛山供电局,广东佛山528000

出　　处：《电力自动化设备》2020年第4期166-171,共6页Electric Power Automation Equipment

基　　金：河北省自然科学基金资助项目(E2017502077)。

摘　　要：针对虚拟同步发电机(VSG)控制的电压源型逆变器接入交流系统,建立含VSG的单机无穷大系统的线性化模型,分析VSG控制的新能源接入对电力系统低频振荡的影响。采用阻尼转矩分析法揭示VSG接入对电力系统机电振荡模式的影响机理,并利用DIgSILENT/PowerFactory仿真软件进行仿真验证,结果表明:VSG通过向系统中同步发电机的机电振荡环提供阻尼转矩改变系统的整体阻尼,进而影响电力系统的振荡稳定性。Aiming at the AC system interconnected with voltage source inverter controlled by VSG(Virtual Synchronous Generator),the linearized model of single-machine infinite-bus system with VSG is established to analyze the influence of VSG-controlled renewable energy access on the low-frequency oscillation of power system.The damping torque analysis method is used to reveal the influence mechanism of VSG access on the electromechanical oscillation mode of power system,and DIgSILENT/PowerFactory simulation software is used to verify the simulation.The results show that VSG changes the overall system damping by provi-ding damping torque to the electromechanical oscillation ring of synchronous generator in the system,thus affecting the oscillation stability of the power system.

关 键 词：虚拟同步发电机 单机无穷大系统 低频振荡 模态分析 阻尼转矩 

分 类 号：TM761[电气工程—电力系统及自动化]