电工技术学报Issue(2)：153-162,10.
高压微网运行模式切换控制策略
Control Strategies of High-Voltage Microgrid for Operation Modes Switching
摘要
Abstract
This paper puts forward a novel voltage mode control strategy to realize the smooth transition between the grid-connected and islanded operation mode of future renewable electric energy delivery and management(FREEDM). Because the inverters are controlled to work as voltage sources all the time, the switch of control strategy is avoided. And the improved angle droop control strategy is used instead of conventional frequency droop control to set frequency free from the change of output , which reduces the difficulty of mode transition. The power deviation is added to the droop control block at the grid-connected mode to realize the constant output power control. The synchronization is ensured by employing the redesigned controller, and the integrator is utilized to reduce the impact when separated from conventional grid, thus the smooth transition of operation modes is achieved. Simulation and analysis show the proposed control strategy can realize fast synchronization, reduce the impact current of point of common coupling(PCC) during the mode transition period, steady the voltage and frequency of the microgrid, and also inhibit circulating current effectively.关键词
微网/电压模式控制/虚拟阻抗/平滑切换Key words
Microgrid/voltage mode control/virtual impedance/smooth transition分类
信息技术与安全科学引用本文复制引用
张明锐,杜志超,王少波,孙华..高压微网运行模式切换控制策略[J].电工技术学报,2014,(2):153-162,10.基金项目
上海市自然科学基金（13ZR1444400），上海市科委重大专项（13DZ1200403）和中央高校基本科研业务费专项资金（0800219169）资助项目。 （）
