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Testing device and application of ultrahigh frequency sensor arrangement for gas-insulated combined switchgear

A combination technology of ultra-high-frequency sensors and gas insulation, which is applied to measuring devices, instruments, and testing dielectric strength, etc., can solve the problem of no relevant reports on sensors, and achieve good use effects, efficient test methods, and simple devices

Active Publication Date: 2017-12-22
STATE GRID CORP OF CHINA +2
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether it is external or built-in, different sensor layout schemes will have a specific impact on the detection results; in the prior art, the sensor layout method and related tests in GIS are applied in the acceptance process, that is, after the sensor installation is completed, Determine whether the arrangement meets the actual requirements through experiments; but there is no relevant report on how to obtain the best installation and arrangement of sensors

Method used

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  • Testing device and application of ultrahigh frequency sensor arrangement for gas-insulated combined switchgear
  • Testing device and application of ultrahigh frequency sensor arrangement for gas-insulated combined switchgear
  • Testing device and application of ultrahigh frequency sensor arrangement for gas-insulated combined switchgear

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Embodiment Construction

[0023] see figure 1 , the structural form of the UHF sensor layout test device for gas-insulated combined switchgear in this embodiment is: a non-PD voltage source 1, a coupling capacitor 2, a measuring impedance 3 and a PD instrument 4 according to the GB / T 7354-2003 standard "Partial Discharge Measurement" constitutes a partial discharge pulse current test platform; GIS model 5 is set, the positive terminal of the non-PD voltage source 1 is connected to the metal conductor in the GIS model 5, and the negative terminal of the non-PD voltage source 1 is connected to the GIS model 5 The shell is grounded; the artificial defect model 6 is placed in the GIS model 5, the built-in UHF sensor 7 and the external UHF sensor 8 are respectively set on the GIS model 5, and the built-in UHF sensor 7 and the external The output signal of the UHF sensor 8 is detected; the oscilloscope 9 uses Tektronix DPO70604B, which has four channels, 6GHz bandwidth, and 25G sampling rate.

[0024] like ...

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Abstract

The invention discloses a testing device and application of an ultrahigh frequency sensor arrangement for a gas-insulated combined switchgear, which is characterized in that a partial discharge pulse current test platform is formed by a partial discharge-free voltage source, a coupling capacitor, a measuring impedance and a partial discharge instrument, a GIS model is arranged, the positive terminal of the partial discharge-free voltage source is connected to a metal conductor in the GIS model, and the negative terminal of the partial discharge-free voltage source is connected to the shell of the GIS model and is grounded; an artificial defect model is arranged in the GIS model, the GIS model is provided with a built-in ultrahigh frequency sensor and an external ultrahigh frequency sensor, and an oscilloscope is used to test output signals of the built-in ultrahigh frequency sensor and the external ultrahigh frequency sensor. The invention is used for testing before the installation of the ultrahigh frequency sensor and determining the best installation position, which provides the basis for GIS sensor arrangement.

Description

technical field [0001] The invention belongs to the technical field of partial discharge detection of electrical equipment, and in particular relates to a test device and a test method for an ultra-high frequency sensor arrangement of a gas-insulated combined switchgear. Background technique [0002] Insulation fault is one of the main faults that may occur in the operation of power equipment. Before the insulation fault of power equipment, there is usually a gradual partial discharge process, that is, Partial Discharge, referred to as partial discharge or PD, which eventually leads to insulation breakdown. . Therefore, on-line monitoring of partial discharge can provide technical support for ensuring the safe, stable and reliable operation of power equipment and the condition-based maintenance of power equipment. Since the early 1980s, the partial discharge Ultra High Frequency (UHF) detection technology for Gas Insulated Switchgear (GIS) has developed rapidly and graduall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R35/00
CPCG01R31/1254G01R35/00
Inventor 李宾宾石永建田宇张健柯艳国陈庆涛罗沙李坚林甄超程登峰朱胜龙杨为朱太云陈忠张国宝赵恒阳蔡梦怡
Owner STATE GRID CORP OF CHINA
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