基于回路重构的构网型虚拟同步机改进控制方法  

Improved control method for grid-forming virtual synchronous generator based on loop reconstruction mechanism

作　　者：黎俊铭 石荣亮 董政 李军徽[2] 张玉[1] LI Junming;SHI Rongliang;DONG Zheng;LI Junhui;ZHANG Yu(Key Laboratory of Advanced Manufacturing and Automation Technology,Guilin University of Technology,Education Department of Guangxi Zhuang Autonomous Region,Guilin 541006,China;Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin 132012,China;School of Electrical Engineering,Shandong University,Jinan 250002,China)

机构地区：[1]桂林理工大学广西高校先进制造与自动化技术重点实验室,桂林541006 [2]东北电力大学现代电力系统仿真控制与绿色电能新技术教育部重点实验室,吉林132012 [3]山东大学电气工程学院,济南250002

出　　处：《农业工程学报》2024年第24期236-244,共9页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金项目(52467022);现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学)开放课题(MPSS2024-08)。

摘　　要：构网型虚拟同步机(grid-forming virtual synchronous generator,GFVSG)可提升电网电压调节能力以及频率稳定性的技术,但在有功指令内部扰动、电网频率外部扰动等工况下存在与同步发电机相类似的并网有功动态振荡问题。针对此问题,该研究建立GFVSG并网系统的并网有功闭环等效控制模型,分析GFVSG并网有功在内部有功指令与外部电网频率两种扰动下存在动态振荡的原因,提出一种基于回路重构原理(loop reconstruction mechanism,LRM)的GFVSG(LRM-GFVSG)改进控制方法,详细给出相应的参数设计方法。最后搭建100 kV·A GFVSG并网系统的MATLAB仿真平台及其试验平台,利用仿真以及试验对比结果共同验证了LRM-GFVSG改进控制方法在抑制GFVSG并网有功动态振荡方面的可行性与优越性,可为提高GFVSG的动态响应性能提供参考。Grid-forming virtual synchronous generator(GFVSG)can improve the voltage regulation ability and frequency stability of power grid,but it has the problem of grid connected active power dynamic oscillation similar to that of traditional synchronous generator under the conditions of internal disturbance of active power command and external disturbance of power network frequency.To solve this problem,the grid connected active power closed loop equivalent control model of the grid connected system for grid-forming virtual synchronous generator is established,and the reasons for the dynamic oscillation of the grid connected active power of grid-forming virtual synchronous generator under the disturbance of internal active power command and external power network frequency are analyzed in this study.An improved grid-forming virtual synchronous generator control method based on loop reconstruction mechanism(LRM-GFVSG)is proposed,and the corresponding parameter design method is given in detail.Finally,the MATLAB simulation platform as well as experimental platform of 100 kV·A GFVSG grid connected system are established,then the feasibility and superiority of the improved LRM-GFVSG control method in suppressing the dynamic oscillation of the grid connected active power of grid-forming virtual synchronous generator are verified by the simulation and experimental comparison results.Simulation and experimental comparison results show that the grid connected active power closed loop control system of GFVSG is upgraded to a second order oscillation control system due to the introduction of virtual inertia control.Therefore,the grid connected active power and output frequency of the grid connected system of grid-forming virtual synchronous generator are prone to dynamic oscillation and overshoot under the disturbance of internal active power command and external power network frequency.Although increasing the value of the virtual damping parameter of grid-forming virtual synchronous generator can improve the ability to suppress

关 键 词：频率稳定性 参数设计 构网型虚拟同步机 并网有功 动态振荡 回路重构 

分 类 号：TM712[电气工程—电力系统及自动化]