The Design Method of AC-DC Microgrid Based on Smart Energy Station

Abstract

In this paper, the AC-DC hybrid microgrid is constructed to realize the unified monitoring and control of energy flow of energy storage station, distributed photovoltaic, AC/DC load and other units. The main power supplies of AC and DC load are grid power and distributed photovoltaic. The energy storage power station is the backup support of AC and DC microgrid. It receives the power grid dispatching automation system in a unified way, realizes the optimal allocation of resources, and ensures the reliable power supply of AC and DC load. Two grid structure design schemes for AC-DC hybrid microgrid are proposed in this paper. The scheme of AC-DC hybrid microgrid is optimized by comparing its economy and reliability. In view of the high reliable power supply demand of secondary devices in data centre and substation, the protection simulation and operation mode switching simulation of microgrid are carried out to verify the effectiveness of the scheme.