Detection of DC Ground Faults of Ungrounded DC System in Sub-Stations/Power Plants
Anantha Krishna M S1, A.D Srinivasan2
1Anantha Krishna M S, Department of Electrical and Electronics Engineering, JSS Science and Technology University, Mysuru, India.
2Dr A.D Srinivasan, Professor, Department of Electrical and Electronics Engineering, JSS Science and Technology University, Mysuru, India.
Manuscript received on 08 April 2019 | Revised Manuscript received on 13 May 2019 | Manuscript published on 30 May 2019 | PP: 2101-2106 | Volume-8 Issue-1, May 2019 | Retrieval Number: A1893058119/19©BEIESP
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Abstract: DC supply is used as source for control and protection of equipments in substations. Ground fault in the DC system can hamper the designed protection and control scheme of AC power system. This paper discusses existing methodologies and proposed technique for ground fault detection in a DC system. In the proposed technique hall effect current sensors are used for sensing the current in each branch of the DC network. This paper demonstrates the online remote monitoring of the DC framework using concept of Internet of Things (IoT), isolation of faults and restoring the DC supply to the equipments in the substation using changeover scheme. Test results show that DC framework of the substation/power plants is remotely monitored and faulty section is efficiently located restoration of DC supply is initiated through other source.
Index Terms: DC Ground Fault, Hall Effect, Internet of Things (IoT), Power Plants, Sub station
Scope of the Article: IoT