并网型逆变器的功率环参数优化  

Optimization of Power Ring Parameters of Grid-connected Inverter

作　　者：田旭[1] 魏璐然 伍晟焘 TIAN Xu;WEI Luran;WU Shengtao(School of Mechanical and Electrical Engineering,China University of Mining&Technology,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)机械与电气工程学院,北京100083

出　　处：《电工技术》2025年第5期17-20,24,共5页Electric Engineering

摘　　要：并网逆变器作为新能源发电系统与电网之间的能量接口,其性能和系统稳定性相关。为了增强新能源接入电网系统的稳定性,引入了虚拟同步发电机技术,其目的是将并网逆变器虚拟成同步发电机。虚拟的同步发电机的基本方程中包括有功和无功控制,也就是通过这两部分实现对系统频率和电压的控制,其中同步发电机有功环的转动惯量和无功环的惯性系数对其稳定性有较大的影响。通过分析建立功率环的小信号模型,探讨转动惯量和惯性系数对系统稳定性的影响,并为参数的选取提供依据,最终选取出能使得系统更加稳定的参数值。In order to enhance the stability of the grid system connected to the new energy,the virtual synchronous gener-ator technology is introduced,and the purpose is to virtualize the grid-connected inverter into a synchronous generator.The basic equation of the virtual synchronous generator includes active and reactive power control,that is,the control of the system frequency and voltage is realized through these two parts,wherein the moment of inertia of the active control loop of the synchronous generator and the inertia coefficient of the reactive power control loop have a great influence on its stability,and the small signal model of the power loop is established by analysis,the influence of moment of inertia and the coefficient of inertia on the stability of the system is analyzed,and the basis for the selection of parameters is provid-ed,and the parameter value that can make the system more stable is finally selected.

关 键 词：虚拟同步发电机 并网逆变器 小信号模型 

分 类 号：TM464[电气工程—电器]