Study on Simulation Design of Typical Photovoltaic Grid-connected System for New Rural Power Grid

Abstract Along with the increasing speed of science and technology, the requirement for electric power development is also higher. We advocate both the rapid development of golden hills and silver mountains, and also the environmental protection and sustainable development of green rivers and green mountains. Therefore, the research and development and promotion of clean energy such as photovoltaic power generation are getting more and more popular. Due to the small capacity of the distribution network in rural areas, small load fluctuation and scattered characteristics, it is suitable to use photovoltaic power generation. The simulation experiment of different voltage levels connected to the grid is studied. The former stage uses the boost circuit controlled by Maximum Power Point Tracking (MPPT), and the latter stage uses the phase-locked loop to control the grid-connected voltage and current. The grid-connected 380V system adopts disturbance observation method for maximum power tracking, and the grid-connected 10kV and 35kV system adopts conductance increment method for maximum power tracking. In the design process, the MATLAB SIMULINK module is used to build a grid-connected model of photovoltaic power generation, to simulate the output power of the inverter. This design analyzes the overall structure of the grid-connected system of photovoltaic power generation, analyzes the process of distributed photovoltaic power generation into the rural distribution network, and provides a basis for the future design of rural photovoltaic power grid connection.