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Now microgrid has aroused increasing attention due to energy sustainable development and the development of distributed generations (DG), such as micro-turbines, gas turbines, wind power, photovoltaic and fuel cells. This paper introduces the basic structure of microgrid and summarizes the overvoltages that can occur in microgrid, including ground fault overvoltages, resonant overvoltages, overvoltage...
This paper studies the overvoltages on the low voltage power supply system caused by lightning surge. We use a 1/5 scale iron model to simulate a building's structure, a surge generator which can generate 1.2/50-8/20 mus waveform used as lightning surge, an SPD which constrain lightning surge under 1 kV, and some polyvinyl chloride cable. In this experiment, different load elements such as resistors,...
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