独立微网变换器的自适应参数虚拟同步机控制策略研究  

Research on adaptive parameter virtual synchronous machine control strategy suitable for independent microgrid converter

作　　者：钟建伟 陈若奇 黄明 张继学 鄢蓓 张哲恺 ZHONG Jianwei;CHEN Ruoqi;HUANG Ming;ZHANG Jixue;YAN Bei;ZHANG Zhekai(Hubei Minzu University,Enshi 445000,China;Enshi Power Supply Company of State Grid Hubei Electric Power Co.,Ltd.,Enshi 445000,China)

机构地区：[1]湖北民族大学,湖北恩施445000 [2]国网湖北省电力有限公司恩施供电公司,湖北恩施445000

出　　处：《现代电子技术》2022年第11期167-171,共5页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(61963014);恩施州科技项目(D20180017)。

摘　　要：在独立混合微电网中的交直流母线接口变流器采用虚拟同步机控制策略来提高变换器的惯性与阻尼,从而提高系统稳定性,但是该策略牺牲了系统的动态调节性能。针对这个问题,提出适用于交直流母线接口变流器的虚拟同步机参数自适应控制策略。分析了微网的瞬时功率平衡特性,采集直流母线电压及系统无功功率,考虑虚拟阻抗,以此提出主体虚拟同步机控制策略,在此基础上对转动惯量与阻尼系数进行自适应控制,从而得到完整控制策略。最后通过Matlab/Simulink仿真分别对比了在整流和逆变两种模式下的自适应转动惯量和阻尼系数虚拟同步机控制策略与固定参数的虚拟同步机控制策略的控制效果。验证了自适应控制策略不仅可以给直流电压与交流频率提供惯性,还可以有效减缓频率骤降并提高频率恢复速率,提高混合微电网系统运行时的抗扰动能力。In the AC/DC bus interface converter in the independent hybrid microgrid,the virtual synchronous machine control strategy is adopted to improve the inertia and increase the damping of the converter,so as to improve the system stability.However,it is at the cost of the dynamic regulation performance of the system.Therefore,a virtual synchronous machine parameter adaptive control strategy suitable for AC/DC bus interface converters is proposed.The instantaneous power balance characteristics of the microgrid are analyzed,the DC bus voltage and system reactive power are collected,and the virtual impedance is taken into account,so as to propose the virtual synchronous machine control strategy.On this basis,the adaptive control of the rotational inertia and damping coefficient are achieved,so as to obtain a complete control strategy.By Matlab/Simulink simulation,the control effects of the virtual synchronous machine control strategy with adaptive rotational inertia and damping coefficient are contrasted with the virtual synchronous machine control strategy with fixed parameters respectively in the rectification mode and the contravariant mode.It has been verified that the adaptive control strategy can not only provide inertia for the DC voltage and AC frequency,but also effectively slow down the frequency sag and increase the frequency recovery rate.Therefore,it can improve the anti⁃disturbance ability of the hybrid microgrid system during operation.

关 键 词：参数自适应控制 虚拟同步机 混合微电网 变流器 功率控制 虚拟阻抗 仿真分析 

分 类 号：TN876-34[电子电信—信息与通信工程]