Scientific paper ID 2040 : 2020/3

The transmission of reactive power through the power supply system is associated with several negative consequences. Some of them are increased losses of active power and also there are larger losses of voltage due to the impedance of the elements of the power system. It is well-known that the excess or shortage of reactive power determines the voltage level in the power system. The transmission of reactive energy from the user to the electricity distribution network is particularly unfavorable. Such a mode is present when there is a minimum load where, in addition to the unjustified losses of active energy, there is an unnecessary increase in the voltage of the user. The compensation of the reactive load is directly related to the quality of the electricity.

The subject of this report is the reactive energy generated and returned to the electricity distribution network. The process of research of the capacitive energy, the selection and installation of compensating devices in the TPSS of the subway and the obtained results will be presented.