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Partial discharge monitoring system and method

A partial discharge monitoring and partial discharge technology, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of detection accuracy and detection efficiency, and the comprehensiveness of detection can not be satisfied, so as to achieve convenient application, comprehensive detection and easy quantitative effect

Active Publication Date: 2017-07-28
杭州纵波科技有限公司
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AI Technical Summary

Problems solved by technology

[0004] For the existing partial discharge monitoring system, its detection accuracy, detection efficiency, and comprehensiveness of detection cannot meet the requirements

Method used

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  • Partial discharge monitoring system and method

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Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] Such as figure 1 The system framework of the partial discharge monitoring system is shown, taking the monitoring of three-phase busbars as an example. Sensor 1 is installed on each three-phase busbar. The type of sensor 1: pulse current sensor, such as high-frequency current transformer (HFCT), capacitive coupling sensors etc. The upper limit of the operating frequency of sensor 1 should not be lower than 10MHz. The sensor 1 should be easy to install when the equipment under test does not need to be powered off, and at the same time, there is no need to change the equipment structure and wiring that affect the operation of the equipment. Various forms of sensors 1 can be used to meet the requirements for various equipment forms of the cable body, cable terminal, and intermediate joint.

[0041] The sensor 1 is connected to the cross-connection box 2...

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Abstract

The invention discloses a partial discharge monitoring system and a method which aim to provide a monitoring system and a method featuring high detection precision, onsite high efficiency, and comprehensive detection of partial discharge. The technical schemes of the invention are as follows: prior to the testing, connecting an apparent discharge calibrator and a partial discharge detector to a cable; through the apparent discharge calibrator, outputting a fixed electricity quantity at two ends of the cable; adjusting the calibration coefficient; determining the measuring range of the partial discharge detector; obtaining the indirectly measured discharge quantity after the calibration of the apparent discharge calibrator; and correcting the detection data of the partial discharge detector; and in the testing, acquiring the partial discharge data and positioning the partial discharge events. With the system and the method, the detection precision can be increased; and through the reception of the ultrasonic wave signals generated from electric equipment by the instrument and the analysis to the tone quality and the intensity, it is possible to rapidly measure the partial discharge and to accurately position.

Description

technical field [0001] The invention relates to a partial discharge monitoring system and method. Background technique [0002] A reliable insulation system is the basic guarantee for the safe operation of power equipment. Statistics show that more than half of the faults in power equipment are insulation faults, so this requires effective detection and diagnosis of the insulation system. Especially when the power system is developing towards UHV and large capacity today, the reliability of the insulation system and the accuracy of insulation detection and diagnosis are particularly important, although modern science and technology provide the necessary conditions for the development of insulation detection and diagnosis , but due to the constraints of the traditional insulation detection and diagnosis theory, the understanding of the insulation system and its discharge characteristics is not enough, so it is very important to fully understand the essential characteristics o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 徐群丰徐国群贾民
Owner 杭州纵波科技有限公司
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