Design Of 10MWp Grid-connected Photovoltaic Power Station In Muling Area

With the advancement of society and the development of science and technology,people's demand for energy is increasing.Photovoltaic power generation is one of the important ways to use renewable energy in the world today.In recent years,as a green energy-saving new energy generation method,photovoltaic power generation has developed rapidly with the support of the Chinese government.It fundamentally solves environment pollution and resources shortage caused by the form of energy conversion based on thermal power generation.In addition,photovoltaic power generation systems also have the advantages of flexible installation,low investment cost,long working life,and rapid adjustment according to load changes.Since the implementation of the “Golden Sun Demonstration Project”in 2009,distributed photovoltaic power generation projects have been implemented so far.Research and construction have begun to take shape.At present,distributed photovoltaic power generation as a new type of power generation application,more and more areas with sufficient light are gradually trying to connect it to the distribution network line for grid-connected power generation.This paper first describes the current domestic and international research trends and development trends of photovoltaic power generation.The analysis introduces the components of photovoltaic power generation and the functions of each part.Introduction to the working principle of two different photovoltaic systems for independent and grid connection.The main factors affecting the efficiency of photovoltaic power generation were analyzed and applied in the subsequent design schemes.Then according to the access capacity and user demand of the distributed photovoltaic power generation system,combined with the typical design of the distributed power generation access system of the State Grid Corporation,several typical access distribution network schemes are given.Finally,the PV simulation software PVSYST was used to simulate the PV power station based on the radiation information of the site and the latitude and longitude altitude.The power generation was predicted and the real feasibility of the PV power plant was verified.Then through the actual case analysis of Heilongjiang Jinyue Group 10 MWp grid-connected photovoltaic power station,the design idea of the project is given,including the selection of devices such as photovoltaic cells,inverters and DC power distribution equipment,the operation mode of photovoltaic modules and the inclination of photovoltaic arrays.The choice,the design and layout of the photovoltaic array.Finally,through the current situation of the Muling area power grid,the grid connection scheme was designed.And based on the loss factors of various efficiencies,the amount of power generation in the next 25 years is estimated.A distributed photovoltaic grid-connected system suitable for Muling City was formed,and a secondary system and dispatching automation of the power station was designed.The research in thispaper has important reference value and significance for the subsequent development of distributed photovoltaic grid-connected in Muling area and even Heilongjiang Province.