MAS Management System Of Wind-Solar Power System Based On Hybrid System Theory

Abstract:Economic development and energy supply are closely related. In recent years, due to the sharp deterioration of the global environment, reducing of traditional energy sources like coal and oil with other issues, the development and utilization of renewable energy has already become an important research topic, and wind-solar system is most popular for their complementarity. By using an effective energy management system (EMS) for wind-solar system, people could obtain an dynamic, real-time, online control, improve the efficiency of renewable energy usage, ensure system stability and extend its useful life. The objective of this thesis is to use multi-Agent theory, hybrid system theory knowledge to developed a optimized integration, rapid restructuring, dynamic scheduling energy management system. The study has important theoretical and practical significance. All the details are as follows:1. The subsystems of wind-solar power are analyzed, suitable simulation models are established using Matlab. In order to solve the system circulation and bus voltage instability problems caused by the voltage difference between the submodules, the use of a primary voltage source in parallel with a number of current source is proposed.2. In order to overcome the shortcoming of low renewable energy utilization in conventional use of improved contract net protocol, hybrid system theory is introduced. Firstly, according to the functional requirements, the system is divided into multiple Agents, and each Agent’s internal state model is established. Secondly, energy policy is made and the continuous states of the system conversion relationships are subdivided. Subsystem working at different conditions are controlled to convert owing to the output of Agents, which leading to a coordination control of the entire system.3. A variety of changing environmental conditions are selected in the Matlab/Simulink/Stateflow for simulation. The simulation results show that the system is able to solve the low renewable energy utilization efficiency problem caused by environmental changes and load changes, to control the output voltage error of the DC bus less than0.4%. The system can meet the design requirements of output stability, response rapidly and energy efficiency.