具有改进功率控制能力的有源备用光伏虚拟同步机控制策略  

Control Strategy of Active Standby Photovoltaic Virtual Synchronizer With Improved Power Control Ability

作　　者：刘安茳 郑友卓 张恒荣 贾先平 LIU Anjiang;ZHENG Youzhuo;ZHANG Hengrong;JIA Xianping(Electric Power Research Institute of Guizhou Power Grid Co.,Ltd.,Guiyang 550025,Guizhou,China;Anshun Power Supply Bureau of Guizhou Power Grid Co.,Ltd.,Anshun 561000,Guizhou,China)

机构地区：[1]贵州电网有限责任公司电力科学研究院,贵州贵阳550025 [2]贵州电网有限责任公司安顺供电局,贵州安顺561000

出　　处：《电力大数据》2024年第11期57-65,共9页Power Systems and Big Data

基　　金：贵州省科技支撑项目(黔科合支撑﹝2023﹞一般292)。

摘　　要：光伏发电的大规模并网给电网系统的稳定性带来诸多影响。为此,本文提出了一种改进的光伏系统虚拟同步机控制策略,在传统虚拟同步机有功控制的阻尼反馈回路中引入阻尼系数控制器,响应动态功率控制,以此来应对电网侧频率扰动对功率输出的影响。通过这一措施,可以对光伏阵列的输出功率进行优化,从而确保系统的一次调节具有充足的有功备用容量。该策略有效地利用了光伏电源自身的特点,使系统在正常运行时具有主动备用能力,保证了电网的稳定性,解决了与大型并网光伏发电相关的惯性恶化、缺乏频率调节能力等问题。最后,经Matlab/simulink仿真平台验证,所提控制策略具备提高系统稳定性的能力。Due to the large-scale grid-connection of photovoltaic,the stability problem of photovoltaic grid-connection system is becoming more and more serious.In order to solve this problem,this paper proposes an improved control strategy of virtual synchro for PV systems.The damping coefficient controller is introduced into the damping feedback loop of the traditional virtual synchro active control loop of PV systems.It can respond to dynamic power control to deal with the influence of frequency disturbance on power output.Through this measure,the output power of the photovoltaic array can be optimized to ensure that the system has sufficient active standby capacity for primary regulation.This strategy effectively makes use of the characteristics of photovoltaic power supply itself,so that the system has the active backup ability during normal operation,ensures the stability of the power grid,and solves the problems related to large-scale grid-connected photovoltaic power generation,such as inertia deterioration and lack of frequency adjustment ability.Finally,this paper verifies the ability of the proposed control strategy to improve the stability of the photovoltaic grid-connected system through Matlab/simulink simulation platform.

关 键 词：光伏并网 虚拟同步机 主动备用 一次调节 光伏电源 

分 类 号：TM615[电气工程—电力系统及自动化]