一种改进的虚拟同步发电机功率控制策略  

An Improved Control Strategy for Power of Virtual Synchronous Generator

作　　者：魏亚龙[1] 张辉[1,2] 宋琼[1] 李晓强[1] WEI Yalong;ZHANG Hui;SONG Qiong;LI Xiaoqiang(School of Automation and Information Engineering,Xi’an University of Technology,Xi’an 710048,Shaanxi,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China)

机构地区：[1]西安理工大学自动化学院,陕西西安710048 [2]西安交通大学电气设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《电气传动》2017年第2期48-52,共5页Electric Drive

基　　金：国家自然科学基金(51277150/51307140);电力设备电气绝缘国家重点实验室开放基金(EIPE12209)

摘　　要：详细分析了虚拟同步发电机(VSG)离网和并网模式下的功频调节特性和励磁调节特性,针对单机并网模式下惯性J,阻尼D和调差系数Kω等参数优化的局限性,提出了一种基于微分负反馈的改进型虚拟同步发电机有功功率控制策略。建立了并网模式下功频调节特性分析模型,分析了加入微分负反馈前后系统的等效阻尼。仿真和实验结果表明所提出的方法能够改善VSG并网模式下的动态特性。Analyzed power frequency regulation and excitation regulation of virtual synchronous generator underthe mode of grid and island in detail;proposed an improved control strategy of virtual synchronous generator based ondifferential feedback for the limitations of optimization of J,D,Kωin the stand-alone mode of grid;established themodel for power frequency regulation of grid mode;analyzed the system equivalent damping after and before addingdifferential feedback.The simulation and experimental results show that the proposed method can improve thedynamic characteristics of virtual synchronous generator with gird mode.

关 键 词：虚拟同步发电机 功频调节 励磁调节 微分负反馈 

分 类 号：TM464[电气工程—电器]