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Transformation Method of On-Line Monitoring Capacitive Voltage Transformer for Surge Arrester

A voltage transformer and capacitive technology, applied in the field of capacitive voltage transformer structure design, can solve problems such as failure to find deterioration, damage, failure to test arresters or transformers, and inability to intuitively reflect the performance of arresters, etc. Guaranteed test accuracy, convenient test maintenance and fault judgment, high efficiency of fault judgment

Active Publication Date: 2016-09-28
PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, 550kv, 220kv, 110kv and 35kv capacitive voltage transformers are mainly used for line or bus voltage monitoring. The lightning arrester inside the traditional capacitive voltage transformer is connected in parallel with the electromagnetic part and then sealed inside the fuel tank, such as figure 1 , figure 2 As shown, the arrester is always connected between the high-voltage end of the transformer and the ground. No matter it is a new installation, routine test or fault finding, it is impossible to test the arrester or transformer, and its deterioration and damage cannot be found. Reflect the quality of arrester performance

Method used

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  • Transformation Method of On-Line Monitoring Capacitive Voltage Transformer for Surge Arrester
  • Transformation Method of On-Line Monitoring Capacitive Voltage Transformer for Surge Arrester
  • Transformation Method of On-Line Monitoring Capacitive Voltage Transformer for Surge Arrester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] On June 20, 2013, the transformation of a capacitive voltage transformer in a 35KV substation included the following steps:

[0029] (1) Ground and open the lower end of the surge arrester in the capacitive voltage transformer, and use epoxy resin insulators for insulation support;

[0030] (2) Select the lower side of the capacitive voltage transformer oil mark close to the bottom of the fuel tank, drill a round hole with a diameter of 10mm, set an insulating rubber ring pad in the round hole and install external lead bolts, the inner and outer sides of the fuel tank, respectively Set rubber pads and pressure sheets on the external lead bolts in sequence, and compress and seal and fix them through the compression nut;

[0031] (3) In the capacitive voltage transformer oil tank, connect the grounding terminal of the arrester to the external lead bolt;

[0032] (4) Outside the oil tank of the capacitive voltage transformer, fix the online monitoring conductance ammeter ...

Embodiment 2

[0035] On July 18, 2013, the transformation of a capacitive voltage transformer in a 110KV substation included the following steps:

[0036] (1) Ground and open the lower end of the surge arrester in the capacitive voltage transformer, and use epoxy resin insulators for insulation support;

[0037] (2) Select the lower side of the capacitive voltage transformer oil mark close to the bottom of the oil tank, drill two through holes with a diameter of 10mm, the nearest distance between the through holes is 30cm, and set insulating rubber ring pads and For external lead bolts, rubber pads and pressure sheets are respectively set on both sides of the external lead bolt oil tank in turn, and are compressed and fixed by compression nuts. In addition, insulating sealant is used to seal the space between the external lead bolts and the fuel tank;

[0038] (3) In the capacitive voltage transformer oil tank, connect the ground terminal of the arrester to one of the external lead bolts, a...

Embodiment 3

[0042] On September 12, 2013, the transformation of a capacitive voltage transformer in a 110KV substation included the following steps:

[0043] (1) Ground and open the lower end of the surge arrester in the capacitive voltage transformer, and use an insulating resin board for insulating support;

[0044] (2) Select the lower side of the capacitive voltage transformer oil mark close to the bottom of the fuel tank, drill a round hole with a diameter of 15mm, set an insulating rubber ring pad in the round hole and install external bolts, respectively in the oil tank of the external bolts The inner and outer sides are sequentially set with rubber pads and pressure sheets, and are compressed and sealed by compression nuts;

[0045] (3) In the capacitive voltage transformer oil tank, connect the grounding terminal of the arrester to the external lead bolt;

[0046] (4) Outside the oil tank of the capacitive voltage transformer, fix the online monitoring conductance ammeter of the...

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Abstract

The invention discloses a transformation method of an arrester on-line monitoring type capacitive voltage transformer. By opening the grounding of the arrester in the oil tank of the traditional capacitive voltage transformer, the grounding end of the arrester is led out of the oil tank through an external lead screw, and connected to the The surge arrester online monitoring table outside the fuel tank is connected, thereby effectively realizing the online monitoring of the conductance current of the surge arrester inside the capacitive voltage transformer, and greatly facilitating the test and maintenance of the surge arrester or transformer and judging the fault, avoiding each maintenance The trouble of having to disassemble the capacitive voltage transformer during the test and the test can be achieved once and for all.

Description

technical field [0001] The invention relates to the technical field of structural design of capacitive voltage transformers, in particular to a method for transforming an arrester on-line monitoring type capacitive voltage transformer. Background technique [0002] At present, 550kv, 220kv, 110kv and 35kv capacitive voltage transformers are mainly used for line or bus voltage monitoring. The lightning arrester inside the traditional capacitive voltage transformer is connected in parallel with the electromagnetic part and then sealed inside the fuel tank, such as figure 1 , figure 2 As shown, the arrester is always connected between the high-voltage end of the transformer and the ground. No matter it is a new installation, routine test or fault finding, it is impossible to test the arrester or transformer, and its deterioration and damage cannot be found. Reflect the performance of the arrester is good or bad. If fault judgment and defect finding are required, the capacito...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00G01R15/06
Inventor 裴继东蒋延磊王学礼张军银高胜韩向林彭磊亚陈越健赵志南
Owner PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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