Three-phase integrated GIS independent bus voltage measuring device

Abstract

The invention discloses a three-phase integrated GIS independent bus voltage measuring device and relates to the technical field of power systems. The device comprises a secondary measurement module as well as a measuring device body and a voltage display module which are connected with the secondary measurement module, and the voltage display module is used for calculating and displaying bus voltages of high-voltage conductors; the measuring device body comprises a measuring tank body, a connecting flange, a bus connector, a metal shielding case and three high-voltage conductors; the measuring tank body comprises an open end and a closed end; the connecting flange is a metal connecting part mounted at the open end, and the connecting flange is used for connecting the measuring tank body and a GIS tank body, so that the bus voltage measuring device and the GIS tank body are mutually independent; the bus connector is mounted on the high-voltage conductors, the bus connector is connectedwith the high-voltage conductors and a bus of the GIS tank body during normal operation, and the bus connector is connected with the high-voltage conductors and a three-phase voltage source during calibration, thus the aim that detection and the calibraction can be performed before the device comes into use is achieved, and voltage measurement accuracy is guaranteed.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a three-phase integrated GIS independent bus voltage measurement device. Background technique [0002] With the sharp increase in electricity demand, the scale of the power grid continues to grow, the voltage level of the power system continues to increase, and the structure of the power grid becomes more intricate, which increases the difficulty of real-time monitoring of the operating status of the power system and the maintenance of power equipment. However, most of the high-voltage measurement methods and high-voltage measurement equipment currently used are voltage transformers with transformers as their essence. There are many problems in practical applications. For example, electromagnetic voltage transformers will appear ferromagnetic at higher voltages Saturation, nonlinear output voltage, poor transient response, etc., and there is a risk of flammability and explo...

AI Technical Summary

Problems solved by technology

[0002] With the sharp increase in demand for electricity, the scale of the power grid continues to grow, the voltage level of the power system continues to increase, and the structure of the power grid becomes more intricate, which increases the difficulty of real-time monitoring of the operating status of the power system and the maintenance of power equipment.

However, most of the high-voltage measurement methods and high-voltage measurement equipment currently used are voltage transformers with transformers as their essence. There are many problems in practical applications. For example, electromagnetic voltage transformers will appear ferromagnetic at higher voltages Saturation, nonlinear output voltage, poor transient response, etc., and there is a risk of flammability and explosion; capacitive voltage transformers have many components and complex structures, and must be used in conjunction with small-capacity electromagnetic voltage transformers, and are subject to temperature and frequency have great influence, and the accuracy is poor

An existing public bus voltage measurement device built on the closed end of the three-phase integrated GIS tank body overcomes the shortcomings of the above two traditional voltage transformers. It uses a simple voltage measurement device to obtain the external voltage of the high-voltage conductor in the gas-insulated combined electrical appliance. The voltage value of the tank body, and then accurately determine the voltage value of the high-voltage transmission line during operation, realizes the purpose of real-time monitoring of the operation status of the high-voltage transmission line, and solves the problem of traditional voltage transformers with large size, high cost, and high maintenance and repair costs , inflexible measurement, high insulation requirements, etc.

However, this voltage measurement device is inconvenient to detect and calibrate before it is put into use, and the accuracy of voltage measurement cannot be guaranteed. Therefore, the structure of the measurement device needs to be improved for practical application

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