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Device and method for testing wide-area dielectric loss and capacitance of condenser bushing

A technology for testing equipment and capacitance, which is applied in the direction of capacitance measurement, measuring equipment, and measuring electrical variables, etc., and can solve problems such as poor anti-interference ability, imperfect instrument function, and inability to perform online monitoring.

Pending Publication Date: 2020-10-30
HONGHE POWER SUPPLY BUREAU OF YUNNAN POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the common relative dielectric loss and capacitance testing devices have imperfect instrument functions, limited testing accuracy, require multiple people to operate at the same time, take a long time, cannot perform online monitoring, and have poor anti-interference ability when drain wires are used in power failure detection, etc. question

Method used

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  • Device and method for testing wide-area dielectric loss and capacitance of condenser bushing

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Experimental program
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Embodiment 1

[0021] Embodiment 1: as figure 1 As shown, on the one hand, a capacitive bushing wide-area dielectric loss and capacitance test device is provided, including bushing drain wire 01, bushing capacitor 02, control switch Ⅰ 03, control switch Ⅱ 06, and high-precision current transformer 04 , fixed resistor 05, intermediate transformer 07, voltage dividing capacitor 08, compensation inductor 09, dielectric loss on-line monitoring device 10;

[0022] The bushing drain line 01 is connected to the first end of the bushing capacitor 02, the second end of the bushing capacitor 02 is respectively connected to the first end of the control switch I03 and the first end of the control switch II06, and the second end of the control switch I03 The two terminals are connected to the first terminal of the high-precision current transformer 04, and the second terminal of the high-precision current transformer 04 is connected to the ground through the fixed resistor 05, and the second terminal of ...

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Abstract

The invention relates to a device and method for testing wide-area dielectric loss and capacitance of a condenser bushing, and belongs to the technical field of power system testing tools. The devicecomprises a bushing drainage wire, a bushing capacitor, a control switch I, a control switch II, a high-precision current transformer, a fixed resistor, an intermediate transformer, a voltage-dividingcapacitor, a compensation inductor and a dielectric loss online monitoring device. According to the invention, high-precision testing of relative dielectric loss and capacitance can be realized without receiving a voltage signal, the dielectric loss and capacitance monitoring of the condenser bushing is achieved. The device is simple in structure, convenient to carry and use, capable of completing effective and accurate testing under the condition that a high-voltage lead is not disassembled and interference is caused by induced voltage on the drainage wire, and high in anti-interference capacity.

Description

technical field [0001] The invention relates to a testing device and method for wide-area dielectric loss and capacitance of a capacitive bushing, belonging to the technical field of power system testing tools. Background technique [0002] The health of the capacitive bushing is closely related to the safety and stability of the power grid. However, the insulation level of equipment in operation is often reduced due to water ingress, dampness, internal oil quality deterioration, and other reasons. Therefore, it is necessary to regularly inspect the bushings in operation, track the deteriorated capacitive bushings in operation, and monitor the development trend of their deterioration to ensure their normal operation. The capacitive bushing has a high probability of equipment defects due to moisture. Once the equipment is flooded with moisture, it will often cause an increase in the loss of its insulation medium. Therefore, the commonly used test methods nowadays are to use...

Claims

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Application Information

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IPC IPC(8): G01R27/26
CPCG01R27/2605G01R27/2694
Inventor 朱启龙郭涛徐吉用赵元东杨露李茂兵黎慧明张志磊李虹陈波王允光余炜
Owner HONGHE POWER SUPPLY BUREAU OF YUNNAN POWER GRID
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