Abstract
With the continuous growth of global energy demand and the increasingly severe environmental problems, microgrid technology, as an important direction of energy transition, has been developing rapidly in China's construction in recent years. This paper systematically introduces the basic concept, structure, power source and its power supply mode of microgrid, and deeply analyzes the optimization strategy of inverter circuits in independent power generation of microgrid. The performance of inverter circuit, as a key technology for converting DC power to AC power in microgrid, directly affects the energy conversion efficiency and power supply quality of the grid. This paper focuses on the improved sag control strategy and virtual synchronous generator (VSG) strategy, which significantly improve the stability and power quality of microgrids by enhancing the flexibility of power control and the adaptability to renewable energy sources. By comprehensively analyzing the current literature and research results, this paper reveals the central role of sag control in independent power generation in microgrids and points out the reasons why it is indispensable in many studies.
Published Version
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