Partial discharge sensor and energy harvesting for high voltage bushing condition monitoring

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Being able to monitor the condition of bushings used in high voltage apparatus is important for long-term**power system reliability. Over long periods, bushing insulation material can degrade due to surface**contamination or defects that develop due to stresses from exposure to high field strengths. Insulator**breakdown can lead to catastrophic failure, power outage, and potentially hazardous conditions. Power HV Inc.**manufactures high voltage bushings and has developed a sensor platform for monitoring bushing operating**condition. Power HV and Dr. G. Bridges at the University of Manitoba will initiate a partnership to develop a**transient earth voltage sensor for measuring partial discharge fields due to bushing insulator faults. The sensor**will be connected to the sensor platform which will sample and wirelessly transmit the partial discharge signals**to a remote server for processing. The sensor platform will be located on the high voltage apparatus, but in**order to provide long-term remote operation without hazardous human intervention, a batteryless source of**power is required. To address this the research team will develop an inductive coil-based energy harvesting**scheme which directly harvests power from the magnetic field generated by the bushing current. The remote**monitoring capability will greatly improve the safety and long-term reliability of power apparatus and provide**Power HV with a unique capability that will enhance the marketability of their products.