• Corpus ID: 212518876

ARM Cortex Based Underground Cable Fault Detection

@inproceedings{Niranjan2018ARMCB,
  title={ARM Cortex Based Underground Cable Fault Detection},
  author={P. Niranjan},
  year={2018}
}

• P. Niranjan
• Published 2018
• Engineering

The project is intended to detect the location of fault in underground cable lines from the base station in kilometers using an ARM cortex microcontroller. This project uses the standard concept of Ohms law i.e., when a low DC voltage is applied at the feeder end through a series resistor to the Cable lines, then current would vary depending upon the location of fault in the short circuited cable. In the urban areas, the electrical cables run in undergrounds instead of overhead lines. Whenever the fault occurs in underground cable it is difficult to detect the exact location of the fault for process of repairing that particular cable. The proposed system finds the exact location of the fault. Here the current sensing circuits made with combination of resistors are interfaced to ARM cortex microcontroller with help of the internal ADC device for providing digital data to the microcontroller representing the cable length in KM’s. The fault creation is made by the set of switches. In case of short circuit (Line to Ground), the voltage across series resistors changes accordingly, which is then fed to an ADC to develop precise digital data to a programmed ARM cortex microprocessor that further displays fault location in kilometers. Keywords— ARM cortex,coocox, INTRODUCTION Underground cables have been widely applied in power distribution networks due to the benefits of underground connection, involving more secure than overhead lines in bad weather, less liable to damage by storms or lightning, no susceptible to trees, less expensive for shorter distance, environment-friendly and low maintenance. Every cable has its own resistance. As the length of the cable increases, so does the resistance value of the particular cable increase. The only disadvantages of utilizing underground cables is that, it is 8 to 15 times more expensive than equivalent overhead lines, more liable to permanent damage following a flash-over, and difficult to locate fault. Faults in underground cables can be normally classified as two categories: incipient faults and permanent faults. Usually, incipient faults in power cables are gradually resulted from the aging process, where the localized deterioration in insulations exists. Electrical overstress in conjunction with mechanical deficiency, unfavorable environmental condition and chemical pollution, can cause the irreparable and irreversible damages in insulations. Eventually, incipient faults would fail into permanent faults sooner or later. The detection of incipient faults can provide an early warning for the breakdown of the defective cable, even trip the suspected feeder to limit the repetitive voltage transients. The location of permanent faults in cables is essential for electric power distribution networks to improve network reliability, ensure customer power quality, speed up restoration process, minimize outage time, reduce repairing cost, dispatch crews more efficiently and maintain network reliability. The state estimation (SE) is an auxiliary tool to provide the necessary information for the proposed location algorithms. The related methods published in journals and proceedings are reviewed, summarized and compared in the next subsections. Underground cables have been widely applied in power distribution networks due to the benefits of underground connection, involving more secure than overhead lines in bad weather, less liable to damage by storms or lightning, no susceptible to trees, less expensive for shorter distance, environment-friendly and low maintenance. Every cable has its own resistance. As the length of the cable increases, so does the resistance value of the particular cable increase.The only disadvantages of utilizing underground cables is that, it is 8 to 15 times more expensive than equivalent overhead lines, more liable to permanent damage following a flash-over, and difficult to locate fault. Faults in underground cables can be normally classified as two categories: incipient faults and permanent faults. Usually, incipient faults in power cables are gradually resulted from the aging process, where the localized deterioration in insulations exists. Electrical overstress in conjunction with mechanical deficiency, unfavorable environmental condition and chemical pollution, can cause the irreparable and irreversible damages in insulations. Eventually, incipient faults would fail into permanent faults sooner or later. The detection of incipient faults can provide an early warning for the breakdown of the defective cable, even trip the suspected feeder to limit the repetitive voltage transients. The location of permanent faults in cables is essential for electric power distribution networks to improve network reliability, ensure customer power quality, speed up restoration process, minimize outage time, reduce repairing cost, dispatch crews more efficiently and maintain network reliability. The state estimation (SE) is an auxiliary tool to provide the necessary information for International Journal of Engineering Research & Technology (IJERT) ISSN: 2278-0181 Published by, www.ijert.org NCETET-2015 Conference Proceedings Volume 3, Issue 05 Special Issue 2015