Research Status and Progress of UHVDC Voltage Measuring Devices

The research status and achievements of DC voltage measuring devices at home and abroad are summarized from three aspects: accuracy, insulation performance and typical faults. This paper introduces in detail the factors affecting the accuracy of the DC voltage measuring device, and the effects of different factors such as voltage equalizing ring, composite insulator and working condition on the insulation performance of the DC voltage measuring device, summarizes several typical faults and accuracy measuring methods of the current DC voltage measuring device, and discusses the existing problems and future development trends of the DC voltage measuring device.