Microgrid Energy Optimization Considering Interruptible Load

Establishing energy model to coordinate and optimize the reliability and economy of microgrid system is significant to enhance economic benefits of the system.As considering that the interruptible load can be incorporated into the microgrid energy management under both grid-connected mode and island mode,the model can optimize different kinds of DG output to make lowest cost sum of the investment,operation and interruption,which should include the exchanging power between microgrid network and main network under the grid-connected mode.In this model,not only the generation characteristics of heat,cool and power cogeneration system of micro gas trubine are considered,but also the optimization of both heat and cool energy is converted to the optimization of power supply for the unified solving.Thus,the cold and heat price can be avoided to influence the model solution,which simplifies the comprehensive power-supply model of microgrid system.Then,the effectiveness of the model and the algorithm is verified by a case of microgrid system.The results show that not only the reliable,economic power supply of microgrid load can be ensured,but also the whole economic power supply of main network can be enhanced.