Simulation And Research On Marine Micro-source Inverter Based On The Virtual Synchronous Generator

With the continuous attention of renewable energy utilization, shipping industry is also increasingly value utilization of clean energy like solar, to reduce the emission of harmful substances and reduce transportation costs. The application of the distributed generation technology to supply energy for ships, has become one of the developing trend. Ship power system is a micro grid. To connect grid, distributed power need a certain control method. Therefore, the study of distributed inverter control method which can fit the micro environment is very important.This paper first interpret the background and significance of the research content of this paper, Introduce the concept and characteristics of distributed generation technology and photovoltaic power generation; The characteristics of the microgrid are briefly introduced, and the control method of the inverter virtual synchronous generator(VSG) in microgrid is presented.; Secondly, reference ship power system, the working principle of the synchronous generator is analyzed. Compare the characteristics of synchronous generator and inverter; Study the inverter control with reference to the control method of synchronous generator; Study VSG control. Later imitate the excitation control system and the speed regulation principle of synchronous generator, and analyze the external characteristic of synchronous generator. Design the regulator of VSG, simulate the power-frequency characteristic and reactive-voltage characteristic of synchronous generator. Lastly, design the ship photovoltaic inverter power, the overall model of photovoltaic inverter power is build. Study grid-connected operation of photovoltaic inverter power by VSG control through PQ mode. The simulation of the model is verified by Matlab and its validity is proved.