Design And Research Of 20MWp Photovoltaic Power System

At present, due to the energy crisis and environment pollution problem are increasingly prominent, people pay more and more attention to renewable energy and green energy.Solar energy is inexhausti modalityble, clean and safe, and it is one of the ideal and the most abundant renewable energy resources.Solar photovoltaic power generation technology is one of the main modality of solar energy development and utilization, and it is the most promising power generation technology.In recent years, solar photovoltaic power generation technology has got rapid development and improved increasingly because of the power electronic technology and solar battery technology.Solar photovoltaic power generation has developed rapidly, and it is forwarding to high efficiency, high reliability and intelligent power generation system, the main approach to use solar photovoltaic power generation is grid-connected power generation.Therefore, study of grid-connected power generation system is of great significance, this research on the application of photovoltaic technology promotion has important and practical significance.Solar photovoltaic power generation system is mainly composed of photovoltaic modules, junction box, inverter, transformer, and related control system.This study introduces the solar photovoltaic power generation technology’s current situation of the development and application in the domestic, as well as the development of photovoltaic power plant identification system; Analysis of solar photovoltaic power generation’s principle:mainly includes the photovoltaic power generation’s principle and modeling, photovoltaic modules’classification, principle and modeling, classification and operation mode of pv arrays, the inverter working principle and classification, selection methods of cables and junction box; as to provide theoretical basis for large-scale grid-connected photovoltaic power station’s design.Take the Yuanmou tianzi mountain 20 MWp grid-connected photovoltaic power station as an example to carry on the design research in Yunnan, and validate this topic’s design; to discusse the efficiency of large grid photovoltaic power generation technology’s promoting.The research have shown that tianzi mountain grid-connected photovoltaic power station running on multi-year average grid electricity for 29.5 million kW · h, according to the thermal power coal consumption (coal) 330g/kW ·h, the photovoltaic power station can save coal 9700 tons every year after put into operation.For 20MWp grid-connected photovoltaic power generation system’s operating data analysis and research, the operating data shows that the design can effectively improve the generated energy and efficiency of the grid-connected photovoltaic power generation system.Research on photovoltaic power station intelligent systems, photovoltaic power station production management system can discover photovoltaic power station electrical equipment failure and failure to ensure the timely processing equipment uptime, increase the generating capacity of photovoltaic power station;PV power station encoding software can count all the equipment of photovoltaic power station systems, provide a reference for the design of photovoltaic power photovoltaic.