Research On Microgrid Hierarchical Control Based On Source Storage Load Cooperation

With the rapid development of distributed power generation and microgrid technology,microgrid will become the core unit of intelligent distribution network in the future,play a vital role,on the one hand,microgrid grid-connected operation can achieve a combination of a variety of adjustable sources to enhance the level of distributed generator integration;on the other hand,microgrid islanded operation can promote the use of distributed energy for local consumption.Based on the microgrid modeling with typical source load,this paper constructs a device-level microgrid model which can fully characterize the multi-operating operation characteristics,and its complexity is limited,and can be used for real-time control.The three different control modes of microgrid including the master-slave,peer-to-peer and hierarchical control modes and corresponding control strategies,and then grasp the different control strategies under different control strategies of the operating mechanism and characteristics;respectively for the master-slave and peer-to-peer control modes hierarchical cooperative control architecture construction method,analysis of master and slave and the cooperative control mechanism of peer-to-peer control mode,which provides the basis for the comprehensive coordination control of source and load.The proposed method of microgrid hierarchical control of multi-time sequence optimization in master-slave mode is proposed,and the curve-translation based hierarchical cooperative control method to promote the active power consumption of distributed power in order to achieve the coordinated operation of the entire microgrid.Based on PSCAD / EMTDC electromagnetic transient simulation platform,typical microgrid systems are simulation to verify the rationality of the hierarchical control architecture,and the effectiveness and adaptability of the hierarchical control method.