Improvement of the simultaneity of residential electricity consumption and solar photovoltaic generation with the use of energy storage

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Dr. Hartmann Bálint
Department of Electric Power Engineering

The difficulty of system integration of most renewable energy production units (wind power plants, solar power plants) is partly due to the stochastic availability of the energy sources. Although this problem is slightly smaller in the case of photovoltaic systems, in their typical installation (household size small power plant) low simultaneity in the consumption and production is seen/observed.

The examination of the production of photovoltaic systems should be considered in a quarter-hourly resolution since the energy consumption of a consumer is also measured quarter-hourly. In order to find a permanent method for the examination of the simultaneity of electricity consumption and production, it is advisable to give the energy consumption of profiled-consumers in quarter-hourly resolution too. In addition the examination of the simultaneity, the mathematical analysis of the production and consumption datasets can also be examined, and the resulted empirical probability destinyand distribution functions can also be approximated with theoretical distributions.

With the use of the curves of the production and the consumption, the seasonal impact on the production and the consumption can be examined and compared. The problem is caused by low simultaneity of production and consumption. If there is a surplus production in the system, that energy can be fed back to the communal network or can be stored in an energy storage device.

By integrating an energy storage device into the system, the amount and inequality of the electricity can be reduced to a certain level, the simultaneity of the production and consumption can be increased, thereby contributing to the realization of the virtual island operation.


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