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Content Provider | IET Digital Library |
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Author | Kaufmann, Gerd Vaitkevičius, Ramūnas |
Abstract | High-impedance Earth fault detection is always a topic for any kind of neutral point treatment in electrical power line systems. For compensated networks, it is the disseminated opinion that fault detection is too difficult. The authors aim to show it is simpler and much more sensitive compared with other neutral point treatments. Especially for the sensitivity of classical fault detection methods such as wattmetric (cos ϕ), admittance method and transient method, the question is what sensitivity to expect. This study gives a basic overview of the mentioned detection methods, their achievable sensitivity and the requirements for that. Since the fault detection should work with natural signals only, methods with artificial signal injection during the fault are not included. The necessary measurement accuracy for different detection methods will be considered as well. Basic aspects with practical measurements taken during Earth fault tests in a compensated system with overhead lines are compared. The fault impedance was >5 kΩ in the 10 kV system. The earth fault tests have been undertaken with Energijos Skirstymo Operatorius. The device Erdschluss Ortungs Relais-3D (EOR-3D) has been tested regarding the fault detection sensitivity. They will show that classical methods can achieve high fault detection sensitivity. |
Starting Page | 971 |
Ending Page | 977 |
Page Count | 7 |
Volume Number | 2018 |
e-ISSN | 20513305 |
Issue Number | Issue 15, Oct (2018) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/2018/15 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.0147 |
Journal | The Journal of Engineering |
Publisher | The Institution of Engineering and Technology |
Publisher Date | 2018-07-18 |
Access Restriction | Open |
Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
Subject Keyword | Admittance Method Arcs (electric) Classical Fault Detection Method Coils Compensated System Earth Fault Tests Earthing Electrical Power Line System Electrical Utility ESO EOR-3D Fault Diagnosis Fault Impedance High Fault Detection Sensitivity High-impedance Earth Fault Detection Lithuania Neutral Point Treatment Overhead Power Line Power Overhead Line Power System Protection Sensitive Ground Fault Detection Transient Method Voltage 10.0 KV |
Content Type | Text |
Resource Type | Article |
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