Study on Fault Detection for Line Section in Active Distribution Network Based on the Generalized State-space Model

Line fault in active distribution network should be detected and isolated timely in a section, or it may cause serious consequences in the system. In order to solve this problem, a novel fault detection method for the line section in active distribution network is proposed in this paper. This method is based on the fault characteristic of generalized state-space model (GSM) of the line section. The GSM is an internal characteristic description of power transmission line which can describe the intrinsic property of the line. When a line section is faulted, the system matrix of the GSM of the line section will be changed. The suggested method has been verified by MTLAB simulation. The simulation results show that the proposed method has good universality and robustness, it can detect all the types of fault in the line section of active distribution network and not be affected by the non-fault disturbance.