Development of a wide-band measurement system for AC PD pulse current signals part 1: System design and simulation

摘要

In this paper, system design and simulation to develop a novel wide-band (WB) measurement system for ac partial discharge (PD) pulse current signals are introduced. The acquisition unit of the measurement system contains four channels, one used as synchronization and the three WB for PD measurement with adjustable sampling rate up to 1 GS/s and bandwidth of 10 kHz ~ 300 MHz, which record the pulses current with their whole waveforms and the occurrence time or phase information. Grouping and separation technology used in the system resorting to the measured pulse waveform sequence is described, which can deal with the de-nosing and multi-PD sources problems before the classification to the PRPD pattern. So it makes a huge difference between those conventional ac PD detection systems only with peak value time series. Results of simulation research proves the feasibility and practicability of the designed ac PD measurement system.