A research team led by Kim Haeng Sok, a researcher at the Faculty of Electrical Engineering, has developed a partial discharge measurement system for insulation condition estimation in electrical power equipment.
Measurement of partial discharges (PD) is an effective way to evaluate insulating material degradation in high voltage equipment.
Partial discharge promotes degradation of insulating material and extends discharge paths to destroy insulation.
The partial discharge measurement system consists of a pulse current sensor, a measurement device and a display device. Partial discharge signals are transferred to the measurement device via a pulse current sensor, and after noise detection and correction, they are described as the amount of discharge to evaluate the state of insulation. A ferrite core is used for the pulse current sensor and the measurement device is aimed at filtering, amplifying and processing the signals.
The research team decided structural parameters of the pulse current sensor and detected the PD signals involved in noise by processing wavelet signals.
The system provides possibility to prevent hazards of high voltage equipment by evaluating in real time the state of insulation for any kind of electric power equipment. It can be widely adapted in the fields of electrical power industry.
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