Overview of Broadband Measurement Characteristics of Voltage Sensing Devices

A high proportion of new energy and high-frequency power electronic equipment access to the new power system presents a large number of high harmonics, broadband oscillation, electromagnetic interference and voltage fluctuations and voltage flicker and other characteristics, the development of voltage sensing devices to ensure the accuracy of the measurement of industrial frequency and harmonic power measurement, the correct action of the relay protection device, transmission line over-voltage monitoring and other aspects of the important significance. To this end, several high-voltage measurement devices are outlined, the working principle and transmission characteristics of several different types of high-voltage measurement devices are compared and analyzed, and the technology enhancement methods are analyzed, and finally the advantages, disadvantages and adaptability of several high-voltage measurement devices are summarized and prospects are made for the practical application and future development of the device.

I. Introduction

With a high proportion of new energy access and the application of large-scale power electronic equipment, the primary side of the grid voltage will show a wide dynamic, fast time-varying characteristics^{[1] [2]}. At present, there is a lack of effective means of monitoring the new characteristics of voltage in new power systems, and the methods of analyzing complex signals are still at the level of harmonic analysis ^[3]. It can not meet the demand of new power system development for complex signal analysis and measurement, and there is an urgent need to improve the existing measurement technology.