Study Photovoltaic Power Station And Energy Storage System Synthesis On Grid Connected Power Penetration Limit

Wide application of clean energy,makes the research of photovoltaic power generation system has become a hot spot.Volatility and grid connected photovoltaic power generation by photovoltaic primary energy penetration level in power grid continues to increase,the safe and stable operation of power grids has become more and more influence factors can not be ignored.With photovoltaic power grid capacity is more and more big,the increase in the local power grid in the effect on the stability of the power system,the power flow calculation,short-circuit calculation,stability analysis,transient analysis more power can not be ignored.Especially in Xinjiang power grid 750kV backbone network is becoming more and more perfect,special high-voltage power grid to clean the power delivery gradually put into operation.Large scale operation to access new energy as main power supply 220kV,750kV delivery channel,influence the operation characteristics of power grid will.It is this uncertainty,it is important to study on the grid security and stability analysis of photoelectric limit under the constraint of penetration.This article is in this context based on the analysis of the limit of the photovoltaic power station reservoir synthesis system light penetration was investigated.Relying on the grid structure is simple in system security and stability constraints access capacity is very limited,so the analysis and Research on energy storage to improve the access capacity of photovoltaic power station is very necessary.In order to solve the above problem,this paper analyzed the system without energy storage limit environmental and energy storage of the photovoltaic power station power penetration,studies the energy storage power on the system access limit penetration improvement.The main research contents of this paper are as follows1)Based on the mathematic model of photovoltaic cell engineering mathematic model of photovoltaic cell and based on the internal impedance of,set up two kinds of model of the photovoltaic array equivalent module.Using MATLAB/Simulink software environment to build a general simulation module of the two types of models.Verification of the PV array model based on the internal impedance can accurately simulate the solar cell output characteristics under different working conditions,accurate simulation of PV array output changes,more suitable for photovoltaic research.At the same time put forward the request country network standard power limit in the 10 minute photovoltaic power output fluctuation is less than 1/3 photovoltaic power plant installed capacity as the constraint condition calculation method based on.2)To validate the photovoltaic power station model of transient stability condition based on PSCAD.Analysis of PSCAD photovoltaic power station access network based on simple after penetration limit.The intensity of illumination light perturbation analysis shows that,photovoltaic power station access capacity is the theoretical value,in the practical application should consider the photovoltaic power station in input maximum fluctuation caused by the change of output limit access capacity access point voltage security and stability constraints.3)Connections overview of the PSASP/UPI,UD interface programming principle and trends.VC++6.0 language can be photovoltaic power station PSASP/UPI call model,and in the PSASP/UD based on transfer function is built based on the model of energy storage system.Through the PSASP voltage stabilization module respectively for photovoltaic power station in IEEE limit of penetrating power,regional grid energy storage after adding different voltage grade scale based on the analysis of PV,access to 35kV,110kV,220kV limit three voltage rating scale photovoltaic power penetrationKey words:PV;photovoltaic grid connected inverter;PSASP/UPI;VC++6.0/MFC App Wizard;energy storage system;static stability constraints;transient stability analysis.This paper is based on the "National Natural Science Foundation of China",project number:51367016,"International Science&Technology Cooperation Program of China" "Xinjiang Hetian area of Qira County in a variety of renewable energy complementary power generation mode and intelligent control research",the limit of optical storage of synthetic grid access system penetration was studied,with certain exploration and practical application of significance.