ABSTRACT
The recent period has been significant for the rapid boost in production of energy using renewable resources. This progress is strongly supported by wind-power plants, which represent significant sources as to the number and the generating capacity. There are further assumptions that the future will bring both the increase in number of the wind-power plants built as well as the generating capacity of individual generators. The power delivered to the network by wind-power plants is still strongly dependant on weather conditions, which are difficult to predict. These facts will force the operators of transmission system to ensure greater regulatory reserves. It might be very likely that once the sites suitable for construction of hydro-power plants have been exploited, the rising demands for regulatory reserves shall be covered by means of conventional coal-burning plants. With the effort towards reduction of fossil fuel consumption, the population needs to seek for other solutions to the above mentioned problems. One of such solutions might be the accumulation of electric power. The electric energy generated by wind-power plants at the time of low loads within the electric power system or in case of exceptionally windy conditions can be accumulated to be released back into the power system at the period of high load or low winds.
