摘要
近年来,随着分布式光伏发电、风电和内燃发电机发电技术的逐步成熟,分布式能源被赋予了新内涵。为增强局部供电的可靠性,针对虚拟同步发电机(VSG)技术及其在光伏-内燃发电机混合微电网中的应用进行了研究。介绍了混合微电网系统的拓扑结构和不同工作模式;建立了基于VSG控制策略的光伏逆变器数学模型,重点分析了基于VSG控制的电压源型逆变器的运行特性;分析了VSG并网和孤岛两种控制模式及其之间的无缝切换。针对雁栖湖生态示范区智能分布式电源系统的光伏-内燃发电机混合微电网,利用其中100 kVA光伏逆变器进行实验,验证了VSG控制策略的可行性与有效性。
In recent years ,with the gradual maturity of distributed photovoltaic ,wind power and micro-gas-turbine generation technology,distributed energy has been given a new connotation.In order to enhance the reliability of local power supply, the technology of virtual synchronous generator （VSG） and its application in photovohaic-gas-turbine hybrid micro-grid are studied.The topology and different working modes of micro-grid system are introduced.The mathematical model of photovoltaie inverter based on VSG control strategy is established and the operating characteristics of voltage source inverter based on VSG control are analyzed.The double control modes of VSG,gridconnected and isolated,and the seamless switch between them are analyzed.In the photovoltaic-gas-turbine smart hybrid micro-grid for distributed power system Yanqi ecological demonstration area,using the 100 kVA photovoltaic inverter, the experiments are carried out to verify the feasibility and effectiveness of the control strategy of VSG.
作者
李清
陈斌
徐志华
赵仕龙
LI Qing;CHEN Bin;XU Zhi-hua;ZHAO Shi-long(Beifing Gas Refco Group Co., Ltd., Beijing 100000, China)
出处
《电力电子技术》
CSCD
北大核心
2018年第4期27-30,共4页
Power Electronics
关键词
微电网
光伏逆变器
虚拟同步发电机
无缝切换
micro-grid
photovohaic inverter
virtual synchronous generator
seamless switch
