The Study On Confront Of The Three-phase Hybrid Series-parallel Access System For Photovoltaic Generation Based On Hybrid Automatic Theory

As a clean and renewable resource, the development of utilizing solar energy has attracted world attention. Solar photovoltaic power generation is an effective form to utilize solar energy. With the development of photovoltaic conversion technology, it has become an important new source of energy generation that more and more countries in the world are focusing upon.Due to the multiple impacts including light intensity, the conversion efficiency of solar panels and control technology on photovoltaic power generation, for electric power systems, photovoltaic power is an unstable and incontrollable power source. The existing method of combined operation of photovoltaic power in parallel with the main power grid has largely solved the issue of integrating the photovoltaic power as supporting power supply, but it can lead to negative impacts on power quality, frequency and voltage stability of the power system. This paper attempts to explore the possibilities to solve the deficiencies of the paralleled access system of photovoltaic power into the main power grid, and discusses the hybrid parallel-series access of photovoltaic power focusing on the confront of the three-phase hybrid series-parallel access system for photovoltaic generation based on hybrid automatic theoryThis paper first explores the status quo of research on photovoltaic power generation and the main types of photovoltaic power generation. Then, it analyzes three-phase hybrid series-parallel access method for photovoltaic generation and the main circuit structure for it based on electrical and electronic technologies, and elaborates on the basic principles of hybrid control system and hybrid automata theories. On the basis of the above-mentioned analysis, the features of the three-phase hybrid series-parallel access method for photovoltaic generation and the principles and process for the hybrid automata theoretical modeling are discussed, and a model for three-phase hybrid series-parallel access method for photovoltaic generation is established. After that, this paper studies the control system for the three-phase hybrid series-parallel access system for photovoltaic generation, and analyzes the tracking and control of the peak frequency of photovoltaic array, the power interface and the multi-function outlet control of the three-phase hybrid series-parallel access, and the principles, algorithms and application of automatic hybrid control. At last, Matlab / Simulink simulation platforms are used to obtain the simulation results. The simulation results further validate the theoretical analysis.This paper studies the confront of the three-phase hybrid series-parallel access system for photovoltaic generation based on hybrid automatic theory. On top of realizing the functions of the paralleled access, it improves the unified control of the power quality. It not only reduces the negative impacts of photovoltaic power on the main grid, but also improves the power quality of the grid. Therefore, it has solid theoretical meanings and application implications.