Variant of Implementation of a Grid-Tied Solar-Wind System with a Storage Battery for Self-Consumption of Local Object

Abstract

The purpose of the work is the improvement the technique of the parameter's choice and control of the solar-wind system. The calculation of the system parameters for the taken schedule of the load is considered in the example. The given values are the degree of reduction of electrical energy consumption from the grid and the use of installed power of the photovoltaic battery. The boundary modes of renewable energy sources generation are taken into account. The base is the calculated values of the average monthly generation of renewable energy sources and the dependency of distribution of energy of the photovoltaic battery for a month for five years according to the archival data. With a coefficient of installed power use close to 0.9, it is possible to have a ratio of the powers of a photovoltaic battery and a wind generator of 6.9:1 with an average value over 5 years of a decrease in consumption from the grid in December by 3.48 times. When generation is below the monthly average one, it is proposed to regulate the consumption of active power according to the forecast. This allows equalizing power consumption in the daytime with a reduction during peak hours. The formation of the SOC battery graph is carried out by taking into account the forecast for the next day. The modeling confirms the possibility of reducing the consumption of electricity from the grid from 2.5 times to the full exclusion of consumption.