可实现运行模式灵活切换的小型微网实验系统  

A Small-scale Microgrid System with Flexible Modes of Operation

作　　者：杨占刚[1] 王成山[1] 车延博[1] 

机构地区：[1]天津大学电力系统仿真控制教育部重点实验室,天津市300072

出　　处：《电力系统自动化》2009年第14期89-92,98,共5页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB219700);国家自然科学基金资助项目(50625722;50837001)

摘　　要：为了能够对微网的运行特性进行深入的理论和实验研究,建立了一个小型实验室微网系统。该系统中的分布式电源采用光伏模拟单元和风机模拟单元,通过电力电子变换装置并入微网;系统以蓄电池为储能装置,并通过双向逆变器并入微网,用以维持微网的暂态功率平衡。当微网联网运行时,以外电网电压和频率为参考,蓄电池双向逆变器、光伏并网逆变器和风机并网逆变器采用恒功率控制;孤岛运行时,双向逆变器的控制策略切换为恒电压、恒频率控制,用以提供微网电压和频率参考。实验结果表明,该系统可以稳定地工作在联网模式和孤岛模式,并可实现二者之间的平滑切换,提高了能量供给的可靠性。To demonstrate advanced distributed generation system integration strategies, a single-phase laboratory-scale microgrid system is set up. Two micro sources are included in the microgrid, a photovoltaic simulator and a wind turbine simulator. They are connected to the AC grid via a flexible power electronic interface respectively. To maintain stable operation, a battery energy storage system is connected via a hi-directional inverter in the microgrid. In the grid-connected mode, both micro source inveriers and hi-directional inverter are in the constant power control mode. In the islanded mode, the bi-directional inverter switches to the voltage and frequency control mode by absorbing or releasing energy. Experimental results show that the laboratory-scale microgrid system can operate in either grid-connected or islanded mode, with a seamless transfer from one to another, and hence increase the reliability of energy supplies.

关 键 词：微网 双向逆变器 联网运行 孤岛运行 

分 类 号：TM743[电气工程—电力系统及自动化]