Optimization Design And Control Technology For Microgrid Based On Multi-energy Complement

As the power demand is increasing, the traditional energy supply tense at the same time also brought serious environmental pollution problems.With large thermal power plant as the power of regular grid is difficult to meet the needs of users in the aspect of safety and diversity.The research use of renewable energy and the growing demand for pluripotent complementary micro grid, oes integrated power supply technology research for the isolated island power supply has important significance.Power generation of output power depending on weather conditions, have extremely intermittent and uncontrollability, at the same time, the power quality is not high, difficult to meet the demand of users, therefore this thesis depends on 863 project 300 kw oes integrated power supply system demonstration, begins with research of the project application, of oes integrated power supply system design optimization, the composite energy storage technology and research dc micro network control technology.This paper first analyzes the oes integration research topic and research significance of power supply system, this paper briefly describes the distributed power supply system and micro power grid, the research status of composite energy storage system, analyses the common structure and operation characteristics of micro power grid, and analyzes the micro grid and grid interface circuit, including AC/DC rectifier circuit, bi-directional DC/DC conversion circuit, DC/AC inverter circuit, etc.Then set the pluripotent complementary dc micro network system, the load requirement analysis and structure optimization design, capacity configuration optimization, and the current and wave energy is to properties of power generation and energy storage system has earried on the modeling and analysis, designed the corresponding converter, at the same time analyze the control strategy, and the optimization design was carried out on the energy storage capacity.Applying MATLAB composite the super capacitor and battery energy storage are simulated, respectively analyzing the characteristics of storage battery and super capacitor and the equivalent circuit model, through the realization of storage battery and super capacitor energy storage control modeling of charge and discharge control and load distribution.Finally put forward dc micro grid power coordinated control technology.Micro grid basic control strategy is analyzed, the control strategy of micro power and energy storage system are analyzed and energy management solutions, put forward busbar voltage of dc micro network control method, the dc bus voltage is divided into five sections, according to the working mode of voltage to determine micro power supply, the storage charge and discharge and control of load, thus ensuring the wave and tide can output under the condition of instability or load fluctuation is bigger, not cause large voltage fluctuation, that enables the busbar voltage to maintain stability, the maximum use of the ocean.