Research On The Interactive Mode Of AC/DC Hybrid Microgrid Based On DSP

With the increasingly severe energy demand and environmental problems,to speed up the construction and supply of new energy has become one of the important goals of economic development in all countries.As the largest developing country in the world,China is in urgent need to develop new energy supply system,such as photovoltaic,wind energy and so on.At present,some tentative research of AC/DC distribution network started at home and abroad.related basic theory,system planning,control strategy and other basic theory also need to be further studied and improved.This paper focused on the interaction between the AC distribution network and the DC power distribution network,using the power and electronic devices in series and parallel as the energy converter of AC/DC power distribution network,and study its related control strategy.In this paper,we studied the possible interaction between AC distribution network and DC power distribution network,and compared the traditional way rectifier with advanced high-frequency rectifier power frequency from the aspect of efficiency,reliability and technical difficulty;We studied the circuit structure of power conversion unit composed of low voltage power electronic device,and methods for realizing high frequency AC and DC power distribution network interface by series and parallel connection;Finally,according to the theoretical basis and simulation experiments for hardware design and software design,and use the DSP chip to build experimental platform to achieve the interaction of AC and DC microgrid.AC/DC power distribution network not only can play the advantages of DC distribution network and AC power distribution network,but also can make full use of the coordination of the coupling converter,to improve the efficiency of distribution network,improve the power quality,and enhance the robustness of the distribution network.Therefore,the AC/DC power distribution network is more practical and wider,which can reduce the frequency conversion device of the user equipment and reduce the manufacturing cost of the equipment.The use of AC/DC distribution network can achieve greater economic benefits,save cost,reduce conversion device,and the operation be more flexible and convenient,reducing the energy consumption,so the security,economy and reliability of the whole system are improved.