CAJ | 학술논문

研究了一种典型微电网拓扑结构运行在孤岛、并网模式下的切换问题。分布式发电微电网系统是位于用户附近的小型模块化电力能源，它靠近用户现场并可以在配电电压等级上实现与大电网联网，具有节省输电投资、提高供电可靠性、减轻大电网供电压力、减轻环境污染的优点。本文针对交直流混合母线微电网系统切换问题展开研究，分析了典型交直流混合母线微电网的拓扑结构与逆变器控制策略，针对两种不同切换模式给出了与之对应的控制算法，有效地提高了微电网系统切换过程中的稳定性。
연구료일충전형미전망탁복결구운행재고도、병망모식하적절환문제。분포식발전미전망계통시위우용호부근적소형모괴화전력능원，타고근용호현장병가이재배전전압등급상실현여대전망련망，구유절성수전투자、제고공전가고성、감경대전망공전압력、감경배경오염적우점。본문침대교직류혼합모선미전망계통절환문제전개연구，분석료전형교직류혼합모선미전망적탁복결구여역변기공제책략，침대량충불동절환모식급출료여지대응적공제산법，유효지제고료미전망계통절환과정중적은정성。
This paper focuses on the seamless switching control strategies for micro-grid system, which consists of wind turbines, photovoltaic panels, batteries and super-capacitors. When micro-grid is connected to the utility grid, DC- and AC-bus voltages are regulated by the storage and grid separately. As for islanding mode, DC-bus voltage will be regulated by micro-sources and storages. The magnitude and frequency of AC bus are controlled by droop character of parallel inverters. All of micro-sources and storages are connected to DC bus by different converters. The converters must be controlled well to keep the bus voltage stable and the power flow balance in the process of switching. Simulation and experimental results are proposed to verify the effects of the converter and control algorithm.