Research on Electric Field Measuring Device for Partial Discharge Charge Location of Insulating Materials

Detecting the electric field generated by the residual space charge of partial discharge is a very important means to detect the partial discharge of opaque insulating materials such as oil-immersed pressboards in laboratory. Based on the partial discharge boundary electric field measurement platform, this paper designs a matching data acquisition system. STM32 single chip microcomputer is used to realize analogdigital conversion and acquisition control, and the channel expansion function is realized through the eight-choice analog switch. The available channel can be expanded up to 8 times of the original while ensuring the sampling rate, so as to ensure the richness of electric field data collected. It provides more powerful data support for the location of partial discharge in opaque insulating materials and the detection of electrical branches.