Field measurement standard device and verification mode of insulated online monitoring device

Abstract

The invention discloses a field measurement standard device of an insulated online monitoring device. The device comprises a shell, and a relative dielectric loss and zinc oxide arrester resistive current analog signal generator and a standard tester, which are arranged in the shell; a first current output terminal, a second current output terminal and a voltage output terminal connected with the relative dielectric loss and zinc oxide arrester resistive current analog signal generator are arranged on the shell, a first current signal is transmitted by the first current output terminal onto a detected online monitoring device, and the first current signal is further transmitted onto the standard tester through a first high precision punch current transformer arranged in the shell; a switching device is further arranged in the shell. The field measurement standard device disclosed by the invention has the advantages of reasonable design, simple structure, small volume, light weight and simple operation, and the field measurement standard device can be used for verifying the dielectric loss factor and the capacitance of capacitive equipment on site and verifying the online or charged test device of resistive current or capacitive current of a metal oxide arrester.

Description

technical field [0001] The invention relates to the technical field of measurement standard devices, in particular to an on-site measurement standard device of an insulation on-line monitoring device and a calibration method. Background technique [0002] When the high-voltage electrical equipment operating in the power grid has insulation defects caused by factors such as poor manufacturing, aging, and external damage, it will cause equipment failure or insulation accidents, which will seriously affect the normal operation of the power grid. In order to prevent such major safety accidents, the current traditional method is to regularly cut off the power for preventive tests and maintenance after the equipment is put into operation, so as to detect the insulation defects inside the equipment in time. However, the test conditions of the power failure preventive test are quite different from the operating state. The dielectric loss test is usually tested at a voltage of 10kV, ...

AI Technical Summary

Problems solved by technology

However, the test conditions of the power failure preventive test are quite different from the operating state. The dielectric loss test is usually tested at a voltage of 10kV, which cannot correctly diagnose the insulation status of the high-voltage equipment under operating conditions, and it is even more difficult to find out the insulation condition between two preventive tests. developmental defects, which will directly affect the experimental results of preventive trials

With the development of the national economy, the whole society has higher and higher requirements for the reliability of power supply and the reduction of power outage time; the scale of the power system is gradually growing, and the traditional preventive tests for regular power outages are time-consuming, laborious and ineffective. Ideal and many other disadvantages are increasingly unable to meet the requirements of safe, reliable and efficient operation of the power grid. Therefore, automatic monitoring of electrical equipment operation and on-line or live monitoring of insulation conditions to achieve condition-based maintenance has become an inevitable development direction for future high-voltage equipment tests.

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