Project Description

After the deregulation in power sector, distributed generation (DG) has become an integral part of the power system. In grid connected mode, micro-grid can help reduce network load. Implementation of micro-grids with renewable energy sources can also help in improving the reduction of carbon emissions. During a disturbance or fault on the main grid, micro-grids can potentially disconnect from the main grid and continue to operate autonomously (islanded mode). Once a microgrid is islanded, there is a high probability that the power generation and load demand will not match. As a result the system frequency and voltage will deviate from nominal values. Loads need to be curtailed to maintain microgrid system stability. In this research, emergency demand response (EDR) schemes are proposed with complex bid model for optimal load shedding in an islanded microgrid. The proposed schemes incorporates customer’s bids with the load demand and use droop control of DGs to determine the optimal point for load shedding, while maintaining microgrid stability.