Installed Power of the Grid-Tied Photovoltaic System with Battery for Self-Consumption of the Local Object

The improvement of the technique of the parameters calculation and control of the grid-tied photovoltaic system with a storage battery for self-consumption of the local object is presented. The choice of installed power of equipment for the taken load schedule of the object is considered in the example. The degree of reduction of electricity consumption from the grid and use of the photovoltaic energy are taken into account. Calculated data by average months generation of photovoltaic battery are added by the distribution of energy by every month for five years. The archival data of the generation of the photovoltaic battery for the coordinates of the object are used. The control principle with reference the active power consumed from the grid by the forecast and the formation of a graph of the battery state of charge was developed. This allows to equalize the graph of power consumption; reduce consumption from the grid during peak hours; reduce the depth of discharge of the battery during morning peak hours. The description of energy processes in steady-state conditions for the daily cycle of operation is formalized and modeling in Matlab with an estimation of the costs of electricity consumed from the grid is performed.