基于直流电压闭锁的光伏虚拟同步控制技术  

Photovoltaic Virtual Synchronous Control Technology Based on DC Voltage Latching

作　　者：陈伟 杨琛 CHEN Wei;YANG Chen(State Grid Qingxu Power Supply Company,Taiyuan 030400,China)

机构地区：[1]国网清徐县供电公司,山西太原030400

出　　处：《电工技术》2025年第4期20-22,共3页Electric Engineering

摘　　要：新能源高比例接入电网使其等效转动惯量减小、抗扰性变差、快速响应能力降低。虚拟同步机控制可提供惯量、频率和电压支持,但常规方法较少考虑源端特性和动态过程。光伏虚拟同步机不同于传统同步机,光伏动态变化对虚拟同步机控制有着重要的影响。基于此,提出一种基于直流电压闭锁的光伏虚拟同步机控制,其优势是充分考虑源端动态特性,根据MPPT评估直流侧电压,对虚拟同步发电机附加功率进行控制,从而消除直流失压风险。The high proportion of new energy access reduces the equivalent moment of inertia,the disturbance immunity and the rapid response ability of the power grid.Virtual synchro control can provide inertia,frequency and voltage support.However,conventional methods take less consideration of sourced-end characteristics and dynamic processes.PV virtual synchro is different from traditional synchro,the dynamic change of PV has an important influence on the control of virtual synchro.Therefore,a PV virtual synchro control based on DC voltage latching is proposed in this paper.Its advantage is to fully consider the dynamic characteristics of the source side.The DC side voltage is assessed according to MPPT,and additional power control is applied to the virtual synchronous generator,thus eliminating the risk of direct loss voltage.

关 键 词：光伏 虚拟同步发电机控制 直流电压闭锁 

分 类 号：TM615[电气工程—电力系统及自动化]