High impedance fault location: Generalized extension for ground faults

• Published in: International journal of electrical power & energy systems Vol. 114; p. 105387
• Main Authors: Doria-Garcia, J., Orozco-Henao, C., Iurinic, L.U., Pulgarín-Rivera, Juan Diego
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2020
• Subjects: Electrical power systems; Fault location; High-impedance faults; Fault location; Electrical power systems; High-impedance faults
• ISSN: 0142-0615; 1879-3517
• DOI: 10.1016/j.ijepes.2019.105387

•The proposed formulation can be applied to the location of both low- and high-impedance faults.•A generalized equation is formulated for the estimation of the fault distance, which does not depend on the fault type.•Detection of a fault condition or normal operating condition in the EPS. This paper presents an impedance-based method to estimate the fault location in transmission lines. The mathematical formulation uses a generalized equation for the estimation of the fault distance, which does not depend on the fault type, and its solution is obtained by the application of a least squares method. The method considers available voltage and current measurements at both terminals of the transmission line as well as the line parameters. Additionally, the proposed method shows an adequate performance for the fault detection. Moreover, you can use it for locating high and low impedance faults. The paper presents extensive numerical experiments demonstrating that the method has high accuracy; specifically, the error in fault location accuracy is under 10% for more than 80% of the test cases. The easiness of method implementation and encouraging test results indicate potential for real-life applications.