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。
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.
作者
缪惠宇
梅飞
张宸宇
杨赟
郑建勇
Miao Huiyu;Mei Fei;Zhang Chenyu;Yang Yun;Zheng Jianyong(School of Electrical Engineering,Southeast University,Nanjing 210000,China;College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China;State Grid Jiangsu Electric Power Co.Ltd,Research Institute,Nanjing 211103,China)
出处
《电工技术学报》
EI
CSCD
北大核心
2019年第17期3622-3630,共9页
Transactions of China Electrotechnical Society
基金
国网江苏省电力有限公司2018年科技资助项目（J2018056）
关键词
虚拟同步机
整流
三相不平衡
虚拟阻抗
Virtual synchronous machine
rectifier
three-phase unbalance
virtual impedance
