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A performance test device and test method of a partial discharge ultra-high frequency sensor

A UHF sensor, partial discharge technology, applied in measurement devices, instruments, measurement of electrical variables, etc., can solve the gap in the use of sensors, the difficulty of building and standardizing test platforms, and the inability to clearly and completely describe the time-domain behavior characteristics of UHF sensors. and other problems, to achieve the effect of simplifying the measurement system and accurate characterization methods

Active Publication Date: 2017-09-29
上海驹电电气科技有限公司
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Problems solved by technology

The effective height parameter in the pulse measurement system commonly used at present is a frequency-varying function, which cannot clearly and completely describe the time-domain behavior characteristics of the UHF sensor when receiving the partial discharge pulse signal, and there is a gap between the measurement result and the field use effect of the sensor
Secondly, the pulse measurement system has high requirements on the pulse source, which usually requires a sub-nanosecond rise time and sufficient output power, but ordinary pulse signal generators are often difficult to meet, which makes the construction and standardization of test platforms difficult. bring difficulties
All in all, at present, UHF sensors still lack a reliable, accurate and cost-effective performance testing device and method

Method used

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  • A performance test device and test method of a partial discharge ultra-high frequency sensor
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  • A performance test device and test method of a partial discharge ultra-high frequency sensor

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Embodiment Construction

[0049]The technical solutions in the present invention will be further described below in conjunction with the accompanying drawings.

[0050] Such as figure 1 As shown, the test device includes a data processing computer 1, a vector network analyzer 2, a GTEM cell 3, a polytetrafluoroethylene cover plate 8 and a UHF sensor to be tested or a calibration antenna 10, wherein the signal input terminal of the GTEM cell 3 It is a coaxial feed head 4, the inner conductor of which extends to the bottom of the cone to form a triangular metal core plate 5, and the bottom of the cone is provided with a 50Ω resistance array 6 and microwave absorbing material 7 for impedance matching, and a circular Hole 9.

[0051] When in use, connect port 1 of the vector network analyzer 2 to the coaxial feed head 4, and port 2 to receive the UHF sensor or calibration antenna 10, and place it on the circular opening 9 through the polytetrafluoroethylene cover plate 8.

[0052] The function of vector ...

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Abstract

The invention discloses a partial discharge ultra-high frequency sensor performance testing device, which includes a gigahertz transverse electromagnetic wave cell, a vector network analyzer, a polytetrafluoroethylene cover plate, a data processing computer, a calibration antenna and an ultra-high frequency sensor to be tested. Using the vector network analyzer as the signal input and output at the same time is cost-effective and easy to implement. The invention also provides a sensor performance testing method using the test device, which can simultaneously provide time-domain parameters and frequency-domain parameters representing sensor performance, and has the characteristics of reliability and accuracy.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment insulation state monitoring, and in particular relates to a performance test device and a test method of a partial discharge ultra-high frequency sensor. Background technique [0002] Partial discharge is closely related to the insulation state of power equipment. Long-term partial discharge may lead to insulation degradation or even breakdown, so both manufacturers and users attach great importance to the detection of partial discharge of power equipment. The ultra-high frequency (hereinafter referred to as UHF) method is one of the methods with the highest sensitivity in the partial discharge detection technology at present, and is widely used in the on-line monitoring and on-site monitoring of gas insulated switchgear (hereinafter referred to as GIS) Live detection, and gradually extended to the partial discharge detection of power equipment such as transformers and power cables. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00
Inventor 陈孝信钱勇许永鹏舒博张一鸣魏翀盛戈皞江秀臣
Owner 上海驹电电气科技有限公司
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