MODELING THE OPERATION OF A GRID PHOTOELECTRIC STATION FOR A CAR PARK

Abstract

The article presents the results of modeling the operation of a grid photovoltaic station using the example of an open- type long-term storage car park «Maxi Parking» for the climatic conditions of the city of Gdansk (Poland) and determines the feasibility of implementing such a system in practice. The use of software allows you to obtain the annual total amount of electrical energy and the annual specific amount of electrical energy. Photovoltaic modules are installed on the roof of a solar canopy in a continuous array at the angle of inclination of the roof, taking into account the possibilities of optimal use of surfaces for installing photovoltaic modules. Using the HelioScope software environment, a design was developed for three configuration options for a grid photovoltaic station, which differ in the power of string inverters, a comparison of the proposed options was made and a structural electrical diagram was drawn up; the operation of the grid photovoltaic station was simulated. The structure of losses in the photovoltaic station system has been determined, which takes into account losses in inverters, losses in the DC network, losses in the AC network, losses due to shading or contamination of photovoltaic modules, reduction in the power of the photovoltaic module due to its overheating, etc. According to the proposed options, the general technical indicators of the network photovoltaic station and the average value of the generation of electrical energy by the photovoltaic station into the network during the year, taking into account losses in the system components, have been determined.The technical and economic indicators of the system have been determined, such as the assessment of the simple payback period, the discounted payback period taking into account the discounting of cash flows. According to the results obtained, the payback period is two years, which is acceptable for similar projects.