A minicomputer-based partial discharge measurement system

In order to make a comprehensive study of partial discharge phenomena, an advanced measurement system has been developed, which utilizes a minicomputer having functions such as memory, data processing and judgement. The system is so designed to process positive and negative pulse trains appearing in phase of a.c. voltage and is provided basically with three functions; repetition vs. pulse height characteristics, time and phase domain pulse height distribution characteristics and phase domain pulse repetition characteristics. Several techniques are introduced to improve signal-to-noise ratio in partial discharge measurement. It can accommodate further modification in data processing when it is necessary in future.