| In recent years,the use of new energy sources draw more and more attention,when photovoltaic power generation technology has been rapid development.Photovoltaic power generation technology is considered to ease the world energy crisis and achieve sustainable development,one of the most important way.With the large-scale PV power plant access,power generation capacity of photovoltaic power generation to become the constraints of photovoltaic power generation technology development of the main factors.Energy storage system is one of the most important means to improve the power consumption of the grid.Therefore,a complete photovoltaic power generation system and energy storage system model is established to analyze the characteristics of the grid connected to the grid after the large-scale PV grid-connected energy storage system.Impact is to promote the application of new energy and an important foundation for the development.This paper focuses on the research of photovoltaic power generation system and battery energy storage system,and analyzes the new problems that the existing grid system may face after the large-scale addition of photovoltaic power generation equipment.Through the use of large-scale battery energy storage system access grid form,and gradually improve the power grid operation characteristics,improve the power grid on the photovoltaic power generation capacity to absorb.At the same time,the tidal current model and electromechanical transient model of large-scale energy storage system,photovoltaic system and conventional power source are simulated and simulated.The static and transient stability of the system is calculated,and a large-scale energy storage system.After the entry into the grid to enhance the capacity of photovoltaic power generation and the impact on the stability of the power grid.The main research contents are as follows:(1)The basic principle and operation characteristics of the battery energy storage and photovoltaic power generation system are studied.The current grid construction and the development of PV are fully researched.Based on the latest research results of PV and battery energy storage system modeling,the PSASP can be applied to the system stability,Transient analysis of photovoltaic power generation and battery energy storage system model,and the photovoltaic power generation system and battery energy storage system into the power grid after the impact of the study.(2)Taking the standard grid and power supply structure of IEEE30 node as an example,the simulation system of combined operation of light and storage was established.The steady-state power flow and transient stability were determined,and the influence of energy storage on grid acceptance was analyzed.Photovoltaic power generation capacity to enhance the role.(3)Based on the reliability calculation results and the transient simulation constraints in PSASP program,and considering the configuration cost of battery energy storage,combining with the characteristics of power grid structure,power supply and load,it is determined that under different PV penetration,the battery energy storage system configuration access grid The effectiveness of the system to improve the rate of elimination of photovoltaic,comparative verification of light-storage joint operation of the correctness and superiority. |
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