A Hybrid AC/DC Microgrid Control Scheme With Voltage-Source Inverter-Controlled Interlinking Converters

This paper proposes a fully decentralized control scheme for hybrid AC/DC microgrids. It proportionally shares the loads in a hybrid AC/DC microgrid among its sub-grids. By controlling the interlinking converters as voltage source inverters, the scheme enables the hybrid microgrid to operate with or without AC sources. It is possible to shut down all the power sources in the AC sub-grid to minimize the fuel consumption. Moreover, any fault in the AC sources will not cause the collapse of the entire AC sub-grid. Consequently, the hybrid microgrid under the control scheme can have higher efficiency, reliability and flexibility as compared to the existing decentralized schemes.