Calculation of Photovoltaic Systems Connection to the Supply Line with Distributed Load

Abstract

The modern power system is undergoing the structural changes caused by the demand for new time. At the same time, there is a gradual process of increasing the load on the system over time which leads to an increase in power loss in power transmission lines and the appearance of additional energy sources within the existing network. The chapter analyzes the effect of integration of distributed production on power losses in power supply lines with the distributed load. The power supply systems of poultry farms were analyzed as the objects of the research. The peculiarity of the present scheme of connection of additional power sources based on photovoltaic systems is that there are several additional power sources connected to the optimal places of joining loads for reducing losses in the supply line. The changes in the value of loss reduction in comparison with the initial line with the optimal combination of power and places of connection of additional sources are analyzed. There was found the maximum level of loss reduction for any given number of additional power supplies. The proposed method of calculation of the connection of power sources on the basis of photovoltaic systems allows to determine the different combinations of optimal power and connection points by the obtained analytical expressions. To reduce the calculations, there was presented the nomogram for determining various combinations of distances to the connection point and capacities of photovoltaic systems with minimal losses in the power supply line.