Electricity metering in power supply systems with grid-connected solar power plants

Abstract

The article discusses the experience of using an induction meter of electrical energy in power supply systems with a network solar power plant connected in parallel to the centralized network. Amendments to Federal Law No. 35-FZ “On the Electricity Industry” of December 27, 2019, which determine the relevance of the construction and operation of grid solar power plants in Russia, have been studied. The block diagram of an experimental solar power plant (SPP) is presented. An experimental network solar power plant has been developed and tested, which makes it possible to assess the possibility of using this type of power plant in rural areas of the central Chernozem region, in a private courtyard. The calculation of the characteristics and the selection of brands of the main components used in the installation of the station, including an induction meter of electric energy, were made. The authors analyzed the consumption of electrical energy from a centralized electrical network without using a solar power plant and during its operation according to the readings of an electric meter. On the basis of the analysis carried out, conclusions were drawn about the reduction of electricity consumption from the centralized network during the operation of a network solar power plant. The operating modes of the electricity meter generated by the solar power plant, the consumption of electricity from the centralized network and the load of the consumer of electrical energy are described mathematically. The relationship between the direction of the current flowing through the counter, the magnetic fluxes induced on the counter disk and the direction of rotation of the disk is described on the basis of mathematical relationships. The authors draw conclusions about the possibility of using induction meters of electrical energy in parallel operation of solar power plants with a centralized network as devices for offsetting consumed and supplied electricity to the network.