Research on Hierarchical Control Method of Micro Integrated Energy System

In the micro integrated energy system, when the load changes, how to manage power output of equipment of the integrated energy system to meet the requirement of customers is a current problem. Based on it, the operation of micro-integrated energy systems is studied and the hierarchical optimization control method is designed which is composed of coordination control layer and optimization control layer. According to the characteristics of different time scales of the integrated energy subsystem, the optimization control layer is divided into three sub layers: slow layer, medium layer and fast layer. Using the hierarchical optimization strategy, the power of main equipment is dynamically adjusted according to the time scale, and the gas-fired boiler can smoothly transit to a stable state through soft switching during the change of heat load. The research result shows that through the control of the system, the coordinated control of the output power of the main equipment in the integrated energy system is realized, and therefore the power quality problems caused by the instability of renewable energy generation and load fluctuation in the micro integrated energy system are effectively solved, and the multi energy collaborative supply is also realized.