Entwicklung eines Regelalgorithmus zur Bereitstellung positiver und negativer Sekundärregelleistung in zukünftigen Mittelspannungsnetzen.

Abstract

Because of the progressive decentralization of the electrical power supply, the requirements for electric grids have increased. To investigate the use of decentralized energy plants for frequency control. This thesis deals with an development of an algorithm for the provision of secondary control power. To analyse the possibilty of frequency control by middle-voltage plants, the algorithm is validated in an isolated micro-grid. Before the algorithm is technically realized, the general conditions have to be set up. This includes concepts for sensors, actuators and communication. The two-staged controller calculates a target value for the power. This power is needed to cause a frequency stabilization. In the second step the power is distributed to a selected group of secondary power units. The validation has shown, that the system limits are defined by the total of maximum power, which is povided by the power units and the settled response time. Within the system limits, the algorithm achieves frequency stability in the network.