| 摘要 |
The invention relates to a method for detecting a fault in an energy supply network (10, 40), in which method state values are determined for a plurality of measuring points (M1, M2, M3) which state values specify an electrical state of the energy supply network (10, 40) at the respective measuring point (M1, M2, M3). The state values are transmitted to a control centre device (17) comprising an evaluation device (18), and the state values are used by the evaluation device (18) for detecting a fault in the energy supply network (10, 40). In order to develop a method of this type such that errors which occur, particularly in energy supply networks with low short-circuit currents, can be detected with high reliability and selectivity, according to the invention a state estimation is performed by means of the evaluation device (18), using a model description of the electrical energy supply network (10, 40) suitable for describing possible electrical states of the energy supply network (10, 40) on the basis of state variables. During the state estimation, it is examined whether an electrical state that, with regard to the state variables used for the respective measuring points (M1, M2, M3), at least approximately matches the respective state values, can be described by the model description, and if such a state is lacking, an error detection signal indicating the existence of a fault in the energy supply network (10, 40) is generated by the evaluation device (18). The invention also relates to a correspondingly designed control centre device (17). |
