| With the development of economy and the progress of the society,the demand for energy is increasing.Searching for the new energy has become an urgent issue.Compared to other energy,solar energy is clean and renewable,which has a great advantage,which resources are not exhausted risk,resource distribution is widespread,subject to geographical constraints,and which maintenance is simple,maintenance costs low.In the current urban grid power supply system,photovoltaic power is a good complement and replacement for the power supply.It’s going to be a very important generation technology in the future.However,at present,there is a shortage of research on the mechanism,characteristics and relevant control strategies of the photovoltaic power plant.There are few studies on the overall modeling,stability detection and the influence and countermeasures of the power system.In all of these areas,this paper covers the design scheme of 10 MW PV power system,the background,present situation and principle of PV power generation,the technical characteristics of grid-connected PV power supply,the structure of distributed PV system and PV modules,the maximum power point tracking control.Build the PV power model.The control strategy of inverter containing LCL filter is proposed.Establish the overall model of PVsystem in MATLAB/SMULINK,and implement parallel network simulation calculation.This paper takes the Sanxia PV power plant of Shijiazhuang City,Hebei Province as an example.Based on the actual project plan,the grid-connected plan and the adjacent grid topology,combined with the technical requirements and design scheme of PV power plant,Voltage analysis,network loss,short-circuit current and other aspects of the impact of the power plant in-depth analysis and research,and put forward the corresponding countermeasures and photovoltaic power plant and the power plant and the impact of the power grid,Network access solution. |
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