TY - JOUR
T1 - Detection of Faulty Feeders and Phases in Resonant Grounded Power Distribution Networks for Bushfire Prone Areas using Measurements from Existing Field Devices
AU - Pirmani, Susheel Kumar
AU - Mahmud, Md Apel
PY - 2023/10/25
Y1 - 2023/10/25
N2 - This paper proposes a framework to detect faulty feeders and phases in resonant grounded distribution networks in bushfire-prone regions. It utilizes the filtered energy ratio of distinct feeders to identify faulty ones which is determined by comparing individual and total feeder energies after filtering through an RC filter. The normalized energy ratio uses the equivalency of faulty feeder energy to total energy to discriminate between faulty (1) and healthy (0) feeders. The current ratio, which is calculated from phase current and total phase currents, is used to detect faulty phases where the direction of the current ratio facilitates faulty phases differentiation. All existing methods are limited to a minimum sampling rate of 5 kHz while confining for faults up to 10 kΩ though current measuring equipment can sample data at 2 kHz and fault impedances exceed this threshold. The purposed approach excels at detecting single line-to-ground faults in diverse impedance scenarios with a 2 kHz or even lower/higher sampling rate. The approach has been rigorously validated through simulations with fault impedances ranging from 0.1 Ω to 0.1 MΩ along with some experiments under a certain scenario.
AB - This paper proposes a framework to detect faulty feeders and phases in resonant grounded distribution networks in bushfire-prone regions. It utilizes the filtered energy ratio of distinct feeders to identify faulty ones which is determined by comparing individual and total feeder energies after filtering through an RC filter. The normalized energy ratio uses the equivalency of faulty feeder energy to total energy to discriminate between faulty (1) and healthy (0) feeders. The current ratio, which is calculated from phase current and total phase currents, is used to detect faulty phases where the direction of the current ratio facilitates faulty phases differentiation. All existing methods are limited to a minimum sampling rate of 5 kHz while confining for faults up to 10 kΩ though current measuring equipment can sample data at 2 kHz and fault impedances exceed this threshold. The purposed approach excels at detecting single line-to-ground faults in diverse impedance scenarios with a 2 kHz or even lower/higher sampling rate. The approach has been rigorously validated through simulations with fault impedances ranging from 0.1 Ω to 0.1 MΩ along with some experiments under a certain scenario.
KW - Circuit faults
KW - Current measurement
KW - Fault diagnosis
KW - Faulty feeder detection
KW - Frequency measurement
KW - Impedance
KW - Time-frequency analysis
KW - Transient analysis
KW - current ratio
KW - energy ratio
KW - faulty phase detection
KW - high impedance faults
KW - low sampling frequency
KW - single line-to-ground faults
UR - http://www.scopus.com/inward/record.url?scp=85176363333&partnerID=8YFLogxK
U2 - 10.1109/tim.2023.3327473
DO - 10.1109/tim.2023.3327473
M3 - Article
SN - 0018-9456
SP - 1
EP - 17
JO - IEEE Transactions on Instrumentation and Measurement
JF - IEEE Transactions on Instrumentation and Measurement
ER -