摘要
微电网作为可再生能源接入电网的有效途径越来越受到人们的关注。微电网中的分布式电源大多需要通过逆变器实现并网,然而传统的控制算法只考虑响应速度和响应精度,并没有考虑类似同步发电机的惯性特征,因而会对电网带来较大冲击。为增加基于逆变器接口的新能源对保持电力系统稳定所需的惯性,本文借鉴同步发电机的转子运动方程、调频特性及无功调节特性,提出基于虚拟同步发电机的T型三电平并网逆变器控制策略;最后利用Matlab/Simulink仿真平台,验证了所提控制策略的有效性。
As an effective way for renewable energy to access the power grid,microgrid has attracted more and more attention.Distributed generations in microgrid mostly need to be connected to the grid through inverters.However,the traditional control algorithm only considers the response speed and accuracy,and does not have the inertia characteristics similar to synchronous generators,so it will bring great impact on the power grid.In order to increase the inertia of new energy resources based on inverter interface for maintaining power system stability,this paper draws lessons from the rotor motion equation,frequency modulation characteristics and reactive power regulation characteristics of synchronous generators.A control strategy of T-type three-level energy storage inverter based on virtual synchronous generator(VSG)is proposed.Finally,the effectiveness of the proposed control strategy is verified by using the simulation platform of Matlab/Simulink.
作者
朱爱华
赵涛
徐宏健
季宁一
Zhu Aihua;Zhao Tao;Xu Hongjian;Ji Ningyi(School of Electric Power Engineering,Nanjing Institute of Technology,Nanjing 211167;School of Automation,Nanjing Institute of Technology,Nanjing 211167)
出处
《电气技术》
2019年第11期11-15,共5页
Electrical Engineering
基金
江苏省配电网智能技术与装备协同创新中心开放基金项目资助（XTCX20181）
江苏省研究生科研与实践创新项目（SJCX19_0611）
南京工程学院大学生科技创新基金项目（TB20191627)
关键词
虚拟同步发电机
T型三电平逆变器
微电网
virtual synchronous generator(VSG)
T-type three-level inverter
microgrid
作者简介
朱爱华(1994-),男,江苏扬州人,硕士研究生,主要从事新能源并网装置的研究工作。
