Congestion management (redispatch) refers to the intervention of the grid operator in the planned schedule of conventional power generation plants to shift energy feed-ins in order to prevent or eliminate power overloads in the power grid.
Control energy serves as a reserve to compensate for any fluctuations in the power grid frequency and to maintain the constant frequency of 50Hz. With the help of balancing power, electricity can be withdrawn as well as additionally fed into the grid.
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Volatility on the spot market increases with the expansion of renewable energies. Battery storage systems use trading on the intraday market to keep shortfalls or surpluses as low as possible and thus counteract the extreme price fluctuations.
If a peak load occurs above a defined limit value, it is capped by the battery storage system. The storage system provides the necessary power accordingly. Thereby the grid supply is kept within the defined value.
Reactive power occurs when electrical energy is transported via alternating current. For example, some electrical appliances briefly store energy and feed it back into the grid. This causes an additional reactive current.
Black start capability is the ability of a power plant to independently start up from a shutdown state. This is particularly important in the event of a widespread power outage in order to bring the power grid back into operation.
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