引入动态虚拟感抗的虚拟机协调控制策略  

Virtual Machine Coordinated Control Strategy With Dynamic Virtual Inductive Reactance

作　　者：郭劭杰 蒋强[1,2] 明旭 常峰 GUO Shao-jie;JIANG Qiang;MING Xu;CHANG Feng(Leshan Normal University,Leshan 614000,China)

机构地区：[1]乐山师范学院,电子信息与人工智能学院,四川乐山614000 [2]四川省预制舱式电力设备工程技术研究中心,四川乐山614000

出　　处：《电力电子技术》2023年第10期93-96,共4页Power Electronics

基　　金：四川省科技厅重点项目(SYTC2022003)。

摘　　要：在交流微电网离网状态运行时,由于线路阻抗不平衡以及功率耦合等原因,传统虚拟同步机(VSG)控制往往存在着无功功率分配不均的问题。此处以VSG控制下的储能变换器为例,提出了一种引入动态虚拟感抗的VSG并联协调控制方法。该方法化简了传统VSG中的定子电压方程使其阻抗呈纯感性,通过引入动态补偿环节根据输出无功功率的差异调节感抗,最终实现了两台储能变换器无功输出功率的均衡。仿真和实验结果验证了所提方法的可行性和有效性。During the off grid operation of AC microgrid,due to some reasons such as the imbalance of line impedance and power coupling,the traditional virtual synchronous generator(VSG)control often has the problem of uneven reactive power distribution.Taking the energy storage converter controlled by VSG as an example,a VSG parallel coordinated control method with dynamic virtual inductive reactance is proposed.This method simplifies the stator voltage equation in the traditional VSG into pure inductance.By introducing the dynamic compensation link,the inductive reactance is adjusted according to the difference of output reactive power,and finally the reactive output power of the two energy storage converters is balanced.Simulation and experimental results verify the feasibility and effectiveness of the proposed method.

关 键 词：微电网 虚拟同步机 动态虚拟感抗 无功功率分配 

分 类 号：TN819.1[电子电信—信息与通信工程]