适用于不平衡负载的构网型PV-VSG控制策略  

Control Strategy for Unbalanced Loads of Grid-forming PV-VSG

作　　者：黄全全 王伟 韦徵[1,2] 邓小君 HUANG Quan-quan;WANG Wei;WEI Zheng;DENG Xiao-jun(Nanjing NARI Group Co.,Ltd.,Nanjing211106,China;不详)

机构地区：[1]南瑞集团有限公司(国网电力科学研究院),江苏南京211106 [2]国电南瑞科技股份有限公司,江苏南京211106

出　　处：《电力电子技术》2023年第8期71-73,89,共4页Power Electronics

基　　金：2022年度江苏省碳达峰碳中和科技创新专项资金重点项目(BE2022003);国电南瑞科技股份有限公司科技项目(524608210261)。

摘　　要：独立构网时,构网型光伏自同步电压源自生成的电压和频率易受不平衡负载影响。针对该问题,提出在构网型光伏自同步电压源控制策略基础上增加谐振控制环,用于抑制不平衡负载下控制环路中的谐振分量。首先阐述了构网型光伏自同步电压源基本工作原理、关键控制方程,其次介绍了不平衡负载下微电网输出电压不平衡机理、给出了谐振控制器参数设计。最后对所提控制策略进行仿真和实验测试,结果验证了该方法的正确性和有效性。When grid-forming photovoltaic self-synchronizing voltage source builds the power grid independently,the voltage and frequency are easily affected by the unbalanced loads.To solve the problem,a resonance control loop is added based on the control strategy of the grid-forming photovoltaic self-synchronizing voltage source,the resonance control loop is used to suppress the resonant component in the control loop under unbalanced load.The basic working principle and the key control equation of the grid-forming photovoltaic self-synchronizing voltage source are expounded,the output voltage unbalance mechanism of microgrid under unbalanced load is described,the parameter design of resonance controller is given.Finally,the proposed control strategy is tested by simulation and experiments,and the results verify the correctness and effectiveness of the method.

关 键 词：光伏 不平衡负载 谐振控制环 

分 类 号：TM615[电气工程—电力系统及自动化]