基于虚拟阻抗的虚拟同步整流器三相不平衡控制策略

doi:10.19595/j.cnki.1000-6753.tces.181002

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摘要随着电力电子装置渗透率的升高,电力系统旋转备用容量和转动惯量大大降低,采用虚拟同步机（VSM）技术能够改善系统稳定性。但目前VSM技术主要针对理想电网下的运行模式,当出现三相不平衡情况时系统无法正常运行。该文在VISMA模型的基础上,搭建虚拟同步整流负荷模型,针对电网不平衡进行功率分析,实现正负序解耦,通过复数滤波器检测正负序分量。通过改变模型中电气部分的虚拟阻抗,并自适应调节无功控制模块,保证直流侧负载电压稳定。搭建基于Matlab/Simulink的仿真模型,验证该方法的有效性,并基于dSPACE进行实验验证。

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关键词 ：虚拟同步机, 整流, 三相不平衡, 虚拟阻抗

Abstract：With the increase penetration of power electronic devices, the reserve capacity and moment of inertia of the system are greatly reduced. The virtual synchronous machine (VSM) technology can greatly improve the stability of the system. But at present, the VSM technology is mainly aimed at the running mode under the ideal power grid, and cannot operate normally when the three-phase imbalance occurs. Based on the VISMA model, a virtual synchronous rectifier model is built in thepaper. The power is unbalanced for power grid, and the positive and negative sequence decoupling is realized. The positive and negative sequence components are detected by complex filter. By changing the virtual impedance of the electrical part in the model, the reactive power control module is adjusted adaptively to ensure the stability of the load voltage of the DC side. A simulation model based on Matlab/Simulink is built to verify the correctness and effectiveness of the proposed method, and the experimental verification is based on dSPACE.

Key words： Virtual synchronous machine rectifier three-phase unbalance virtual impedance

收稿日期: 2018-06-11 出版日期: 2019-09-20

PACS:

TM461

基金资助:国网江苏省电力有限公司2018年科技资助项目（J2018056）

通讯作者: 缪惠宇男, 1992年生, 博士研究生, 研究方向为电力电子在电力系统中的应用。E-mail：mhy_seu@163.com

作者简介: 梅飞男, 1982年生, 博士, 研究方向为智能电网。E-mail：meifei@hhu.edu.cn

引用本文:

缪惠宇, 梅飞, 张宸宇, 杨赟, 郑建勇. 基于虚拟阻抗的虚拟同步整流器三相不平衡控制策略[J]. 电工技术学报, 2019, 34(17): 3622-3630. Miao Huiyu, Mei Fei, Zhang Chenyu, Yang Yun, Zheng Jianyong. Three Phase Unbalanced Control Strategy for Virtual Synchronous Rectifier Based on Virtual Impedance. Transactions of China Electrotechnical Society, 2019, 34(17): 3622-3630.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.181002 https://dgjsxb.ces-transaction.com/CN/Y2019/V34/I17/3622

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