Portable GIS partial discharge high-frequency sensor test device and test method

Abstract

The invention discloses a portable GIS partial discharge high-frequency sensor test device, which comprises a modulation signal source module, VCO voltage-controlled radio-frequency oscillator module, a broadband radio frequency power amplifier module, a wireless phase synchronization signal module, a radio-frequency power indicator and a power supply module. The device is suitable for function test of all GIS partial discharge online-monitoring UHF ultra-high-frequency sensors of a substation and a GIS partial discharge online monitoring system, so that the problem that an existing GIS partial discharge online-monitoring sensor cannot carry out on-site detection and the like is thoroughly solved. The device also has functions of partial discharge online monitoring system high-frequency channel detection and UHF sensor received frequency bandwidth range determination. The device is small in size, light in weight and simple to operate, and is very suitable for substation equipment on-line monitoring sensor on-site test and verification; and the test device is powered by a high-power battery, so that the test device is long in battery duration time, does not need an external power source module and is more convenient to use on site.

Description

technical field [0001] The invention relates to the technical field of power equipment detection, in particular to a portable instrument for on-site inspection of a substation GIS local on-line monitoring UHF sensor, and also to a testing method. Background technique [0002] With the popularization of real-time monitoring equipment for GIS partial discharge lines, UHF sensors are used to monitor the monitoring points 24 hours a day in real time, with a wide coverage, and remote monitoring of the operation status of GIS anytime, anywhere to ensure the safe and reliable operation of GIS . However, partial discharge does not exist on all devices. When monitoring devices without partial discharge, the sensor cannot sense the signal. From the data point of view, the data is basically unchanged or zero. Even if the sensor is broken or the performance is degraded in long-term operation, it cannot be judged from the data. Once the partial discharge actually occurs, it cannot be de...

AI Technical Summary

Problems solved by technology

[0004] 1) At present, there is no instrument for GIS partial discharge UHF high-frequency sensor detection on the market, and there is no portable instrument for field use;

[0005] 2) At present, the equipment that can only simulate partial discharge signals in the laboratory is expensive, large in size and inconvenient for on-site use, and requires high-power booster equipment, which is inconvenient and unsafe to use;

[0006] 3) The GIS partial discharge UHF high-frequency sensor in operation has no partial discharge signal when no partial discharge occurs, and it is impossible to judge whether the performance of the sensor is good or not according to the system background;

[0007] 4) After the online monitoring equipment is installed in the new substation, the equipment does not run with electricity before it is put into operation. Due to the lack of special instrument detection, it is impossible to conduct batch inspection before the UHF high-frequency sensor is good or bad and whether the installation is correct.

[0008] In view of the fact that there is no portable special instrument for the detection of this UHF high-frequency sensor on the market

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