摘要
首先建立同步发电机(SG)和虚拟同步发电机(VSG)的小信号模型,基于相同的控制理论,分析SG和VSG的调频能力与惯量水平对系统低频振荡模态的影响,对比SG和VSG对低频振荡特性产生影响的差别,并研究产生差别的原因。研究结果表明,VSG的虚拟阻抗控制环节是使VSG与SG低频振荡特性不一致的关键因素,当虚拟阻抗较小时,VSG对低频振荡模态的影响与SG类似。
A small-signal model of synchronous generators(SG)and VSG was first established. Based on the same control theory,the effects of SG and VSG’s frequency modulation capability and inertia level on the low-frequency oscillation mode of the system were analyzed. The effect differences and the reasons for the difference of SG and VSG on low-frequency oscillation were studied. The research results show that the virtual impedance control link of VSG is the key factor that makes VSG and SG inconsistent in low frequency oscillation characteristics. When the virtual impedance is small, the influence of VSG on low frequency oscillation mode is similar to SG.
作者
王倩
孙大卫
盛四清
张饶
刘辉
巩宇
Wang Qian;Sun Dawei;Sheng Siqing;Zhang Rao;Liu Hui;Gong Yu(College of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China;State Grid Jibei Electric Pouter Research Institute,Beijing 100045,China;College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2021年第12期410-418,共9页
Acta Energiae Solaris Sinica
基金
国家电网公司总部管理项目
国家电网公司东北分部科技项目。
关键词
虚拟同步发电机
低频振荡
小信号模型
虚拟阻抗
virtual synchronous generator
low-frequency oscillation
small signal model
virtual impedance
