基于自适应虚拟阻抗的多VSG并联控制策略  

Parallel Control Strategy for Multiple VSGs Based on the Adaptive Virtual Impedance

作　　者：王金玉[1] 王蕊 王士勇 WANG Jin-yu;WANG Rui;WANG Shi-yong(School of Electrical and Information Engineering,Northeast Petroleum University;Desulfurization Branch Co.,CNPC Electric Power Technology Service Company)

机构地区：[1]东北石油大学电气信息工程学院 [2]中油电能电力技术服务公司脱硫分公司

出　　处：《化工自动化及仪表》2025年第1期70-75,共6页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金青年科学基金(批准号:62203105)资助的课题。

摘　　要：微电网中很多逆变器采用虚拟同步发电机(VSG)并联的控制方式,各逆变器线路阻抗间存在差异和负载变化都会导致各VSG功率分配不均甚至产生环流损害系统器件。因此,提出一种适用于多VSG并联的自适应虚拟阻抗控制策略,实现虚拟阻抗的动态调节,并通过无功电压调节环对线路阻抗差异产生的偏差进行补偿,从而达到VSG输出无功功率合理均分和减小环流的效果。Matlab/Simulink仿真结果验证了该控制策略的有效性和可行性。Many inverters in microgrid employs parallel control mode for virtual synchronous generators(VSG).The difference in line impedance and load variation of each inverter leads to uneven power distribution of each VSG and even produces circulation damage to system components.In this paper,an adaptive virtual impedance control strategy for multi-VSG parallel was proposed to realize the dynamic adjustment of virtual impedance and to compensate the deviation caused by the difference of line impedance through the reactive voltage regulation loop,so as to achieve the effect of reasonable equal distribution of VSG output reactive power and reduce the circulation.Matlab/Simulink simulation results verify the effectiveness and feasibility of the control strategy.

关 键 词：虚拟阻抗控制策略 微电网 多VSG并联 自适应虚拟阻抗 功率分配 电压补偿 

分 类 号：TM35[电气工程—电机]