Design Scheme Of A 50MW Ground-Based Photovoltaic Power Station In Yingkou

With the rapid growth of photovoltaic(PV)generation and the installation tide caused by the adjustment of feed-in subsidies,kinds of problems may occur in the duration of construction or feed-in generation.Some should be treated carefully in the early design but not for the packed schedule of building a photovoltaic power station(PPS).Therefore,the paper studies on the site selection and the generation system design of a typical PPS through the scientific planning method and design theory.In a case of 50 MW PPS in Yingkou,the work solves some key points in the early design process,including the solar resource assessment,equipment selection,array operation mode,connection scheme and electric quantity prediction.This paper proposed a method of obtaining the solar energy data in the area where the solar radiation monitoring station is not available.In this method,the weather data of a designated area are interpolated with the weather software and the authoritative database.And the reliability of the obtained data is verified.Through the detailed assessment of the solar resource and meteorological data in Yingkou,the annual solar energy in the city is revealed,which proves that the area is suitable for the construction of the ground PPS for the scale development of solar resource.According to the actual situation of the case,the paper gives the principle of selecting the solar cell and the solar module types,and also provides the guide of selecting the PV inverter in the consideration of technical indexes.A reasonable design of solar module strings is calculated by considering the technical parameters of both the solar module and the inverter.A hierarchical structure principle is proposed to explain the multi-stage collection of PV arrays.It considers both the early cost and the maintenance difficulty and then determines the utilization of the fixed operation of the module support.Based on the actual site location,the optimal installation inclination of the modules is calculated to ensure the maximum radiation received on the surface and then to maximize the power generation of the whole station annually.On the basis of the above research,the overall scheme of a 50 MW PPS in Yingkou is proposed.The shadow coefficient is calculated and then the layout and connection of the module brackets are designed further.Finally,the environmental impact during the station construction and operation is analyzed,and the direct power generation,environmental benefits and indirect social benefits that the station can create for the local area are also evaluated.The work proves that the scheme of a 50 MW PPS in Yingkou is feasible in terms of technical,economic and environmental benefits.It also provides experience for the construction of such a similar PPS.