Wireless measurement system for ultra-high voltage DC voltage divider

Abstract

The invention provides a wireless measurement system for an ultra-high voltage DC voltage divider, which comprises a high-voltage side wireless data acquisition device and a low-voltage side wireless terminal, and is characterized in that the high-voltage side wireless data acquisition device comprises a first measurement input end, a second measurement input end, an overvoltage protection circuit, an impedance matching circuit, a data acquisition module and a wireless transmission module, wherein the overvoltage protection circuit, the impedance matching circuit, the data acquisition module and the wireless transmission module are sequentially connected; and the first measurement input end is connected between series connected measuring resistors in two voltage transformers, and the second measurement input end is connected between series connected shielding resistors in the two voltage transformers. Compared with the prior art, the wireless measurement system provided by the invention for the ultra-high voltage DC voltage divider is small in size, light in weight, low in cost, extremely convenient in installation and wiring, applicable to installation, debugging and testing occasions of an ultra-high voltage transformer, and also applicable to other low-voltage application environments at the same time.

Description

technical field [0001] The invention relates to the technical field of instrument detection, in particular to a wireless measurement system for an UHV DC voltage divider. Background technique [0002] The DC voltage standard transformer for UHV is generally formed by connecting multiple low-voltage DC standard voltage transformers in series. Each standard voltage transformer is composed of a large number of resistors, which form two independent working circuits, a measurement circuit and a shielding circuit inside. , each loop is formed by a large number of resistors connected in series. In order to achieve higher accuracy, it is required that the voltage drop across any adjacent resistor between the two loops should be consistent. Although each resistor has been screened and matched in the early stage of design, the error of the resistors will accumulate after being connected in series. The more resistors are connected in series, the more serious the voltage imbalance will...

AI Technical Summary

Problems solved by technology

[0003] The conventional method is to install an insulator next to the two-section voltage standard transformer in advance, and install multiple voltage equalizing rings on the insulator, and finally hoist the high-precision voltmeter and UPS power supply into the voltage equalizing ring, and the data can be viewed through a telescope or with an optical fiber. Transmission to the ground, installation cost is high, difficult and time-consuming

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