CN103308832A - Partial discharge test device for high-voltage cable insulation middle joint and use method - Google Patents
Partial discharge test device for high-voltage cable insulation middle joint and use method Download PDFInfo
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- CN103308832A CN103308832A CN2013102113599A CN201310211359A CN103308832A CN 103308832 A CN103308832 A CN 103308832A CN 2013102113599 A CN2013102113599 A CN 2013102113599A CN 201310211359 A CN201310211359 A CN 201310211359A CN 103308832 A CN103308832 A CN 103308832A
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Abstract
The invention relates to a partial discharge test device for a high-voltage cable insulation middle joint and a use method. The partial discharge test device is characterized in that each cross bonding link box and two connecting points connected with the same insulation middle joint are respectively connected with one end of a cable, and the middle of the cable is wound into a plurality of turns of coils; and a high frequency current sensor is reeved through the coils, and the output end of the high frequency current sensor is connected with a partial discharge measurement device. According to the partial discharge test device provided by the invention, the two connecting points connected with the insulation middle joint are connected by the cable, and the partial discharge live detection of the insulation middle joint is realized through the output of the high frequency current sensor, so that the defect that the high frequency current sensor can not be placed because the size standard of the cross bonding link boxes and connection sheets is different is overcome, and the test process is quick and very convenient.
Description
Technical field
The invention belongs to high-voltage cable insulating intermediate head shelf depreciation proving installation field, especially a kind of high-voltage cable insulating intermediate head shelf depreciation proving installation and using method.
Background technology
Power industry standard DL/T5221-2005 " urban electric power cable line designing technique regulation " and the company standard Q/GDW512-2010 of State Grid Corporation of China " power cable line operating standard " regulation: the selection of the metallic shield earthing mode of single core cable circuit should meet the following requirements: (1) cable line is short and when meeting the induced voltage regulation and requiring, can take the direct ground connection of circuit one end and at the other end through overvoltage limiter ground connection, or the direct ground connection of middle part single-point and at two ends through overvoltage limiter ground connection.(2) cable line beyond the above-mentioned situation should be evenly divided into cable line three sections or three multiple section, adopts isolating joint to implement cross interconnected ground connection.
110kV and the cross interconnected earthing mode of above electric pressure Voltage Cable Lines Construction are as shown in Figure 1; comprise high-tension cable 2; cable terminal 1; insulation intermediate head 3 and cross interconnected case 5; two insulation intermediate heads between cable terminal and rightmost insulation intermediate head connect a cross interconnected case by lead 4 respectively; six tie points are set in each cross interconnected case; three tie points that are arranged in the top are connected with the insulation intermediate head left side of threephase cable respectively; three tie points that are arranged in the below are connected with the insulation intermediate head right side of threephase cable respectively; cross connection between two groups of tie points of above and below is positioned at three tie points of below all by sheath protector ground connection.
In the test, high frequency partial discharge pulse current signal in the High Frequency Current Sensor of the installation in flakes detection ground current of cross interconnected case, estimate the running status of cable termination, but in real process, because the interconnected case of each producer with size is different with standard in flakes, exists in flakes too wide, sensor to wear to enter, and the chest space is too little, in flakes between apart from too near, do not reserve situations such as sensor space, cause to measure local discharge signal.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of high-voltage cable insulating intermediate head shelf depreciation proving installation of provide rational in infrastructure, being convenient to operate.
The technical scheme that the present invention takes is:
A kind of high-voltage cable insulating intermediate head shelf depreciation proving installation, comprise three high-tension cables, insulation intermediate head and cross interconnected case, three insulation intermediate heads are installed on every high-tension cable, wherein two insulation intermediate heads connect a cross interconnected case respectively by cable, it is characterized in that: two tie points that described each cross interconnected case is connected with same insulation intermediate head connect an end of a cable respectively, this cable middle part turns to multiturn coil, install a High Frequency Current Sensor in this coil, the output terminal of this High Frequency Current Sensor connects measurement of partial discharge equipment.
And described High Frequency Current Sensor connects described measurement of partial discharge equipment by coaxial signal line.
And the number of turn of described coil is that the measurement range of High Frequency Current Sensor is divided by the current value that flows through in the cable in parallel with tie point.
Another object of the present invention provides a kind of using method of high-voltage cable insulating intermediate head shelf depreciation proving installation, it is characterized in that: may further comprise the steps:
⑴ be connected an end of cable with the tie point that cross interconnected case is positioned at the top;
⑵ make the middle part of cable repeatedly be wrapped on the High Frequency Current Sensor;
⑶ another tie point that be positioned at the other end of cable and cross interconnected case in the below and be connected same insulation intermediate head with tie point described in the step ⑴ connects;
⑷ be connected by coaxial signal line the output terminal of High Frequency Current Sensor with measurement of partial discharge equipment;
⑸ finish the charged detection of shelf depreciation of an insulation intermediate head in the phase high-tension cable;
⑹ repeating step ⑴～⑸ finishes the charged detection of shelf depreciation of insulation intermediate head in all phase high-tension cables.
Advantage of the present invention and good effect are:
Among the present invention, connect two tie points that each is connected with the insulation intermediate head by cable, output by High Frequency Current Sensor realize the insulating charged detection of shelf depreciation of intermediate head, avoided in the prior art cross interconnected case and in flakes dimensional standard differ, can't place the defective of High Frequency Current Sensor, test process is rapid, and is very convenient.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is further described, and following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
A kind of high-voltage cable insulating intermediate head shelf depreciation proving installation, as shown in Figure 1, comprise three high-tension cables 2, insulation intermediate head 3 and cross interconnected case 5, three insulation intermediate heads are installed on every high-tension cable, wherein two insulation intermediate heads connect a cross interconnected case respectively by cable, innovation of the present invention is: two tie points 6 that described each cross interconnected case is connected with same insulation intermediate head, 7 connect an end of a cable 11 respectively, this cable middle part turns to multiturn coil 12, install a High Frequency Current Sensor 10 in this coil, the output terminal of this High Frequency Current Sensor connects measurement of partial discharge equipment 8.
In the present embodiment, described High Frequency Current Sensor connects described measurement of partial discharge equipment by coaxial signal line 9.The number of turn N of described coil is that the measurement range M of High Frequency Current Sensor is divided by the current value I that flows through in the cable in parallel with tie point, i.e. N=M/I.
The using method of above-mentioned high-voltage cable insulating intermediate head shelf depreciation proving installation may further comprise the steps:
⑴ be connected an end of cable with the tie point that cross interconnected case is positioned at the top;
⑵ make the middle part of cable repeatedly be wrapped on the High Frequency Current Sensor;
⑶ another tie point that be positioned at the other end of cable and cross interconnected case in the below and be connected same insulation intermediate head with tie point described in the step ⑴ connects;
⑷ be connected by coaxial signal line the output terminal of High Frequency Current Sensor with measurement of partial discharge equipment;
⑸ finish the charged detection of shelf depreciation of an insulation intermediate head in the phase high-tension cable;
⑹ repeating step ⑴～⑸ finishes the charged detection of shelf depreciation of insulation intermediate head in all phase high-tension cables.
Among the present invention, connect two tie points that each is connected with the insulation intermediate head by cable, output by High Frequency Current Sensor realize the insulating charged detection of shelf depreciation of intermediate head, avoided in the prior art cross interconnected case and in flakes dimensional standard differ, can't place the defective of High Frequency Current Sensor, test process is rapid, and is very convenient.
Claims (4)
1. high-voltage cable insulating intermediate head shelf depreciation proving installation, comprise three high-tension cables, insulation intermediate head and cross interconnected case, three insulation intermediate heads are installed on every high-tension cable, wherein two insulation intermediate heads connect a cross interconnected case respectively by cable, it is characterized in that: two tie points that described each cross interconnected case is connected with same insulation intermediate head connect an end of a cable respectively, this cable middle part turns to multiturn coil, install a High Frequency Current Sensor in this coil, the output terminal of this High Frequency Current Sensor connects measurement of partial discharge equipment.
2. a kind of high-voltage cable insulating intermediate head shelf depreciation proving installation according to claim 1, it is characterized in that: described High Frequency Current Sensor connects described measurement of partial discharge equipment by coaxial signal line.
3. a kind of high-voltage cable insulating intermediate head shelf depreciation proving installation according to claim 1 is characterized in that: the number of turn of described coil is that the measurement range of High Frequency Current Sensor is divided by the current value that flows through in the cable in parallel with tie point.
4. the using method of a kind of high-voltage cable insulating intermediate head shelf depreciation proving installation according to claim 1 is characterized in that: may further comprise the steps:
⑴ be connected an end of cable with the tie point that cross interconnected case is positioned at the top;
⑵ make the middle part of cable repeatedly be wrapped on the High Frequency Current Sensor;
⑶ another tie point that be positioned at the other end of cable and cross interconnected case in the below and be connected same insulation intermediate head with tie point described in the step ⑴ connects;
⑷ be connected by coaxial signal line the output terminal of High Frequency Current Sensor with measurement of partial discharge equipment;
⑸ finish the charged detection of shelf depreciation of an insulation intermediate head in the phase high-tension cable;
⑹ repeating step ⑴～⑸ finishes the charged detection of shelf depreciation of insulation intermediate head in all phase high-tension cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310211359.9A CN103308832B (en) | 2013-05-31 | 2013-05-31 | A kind of high-voltage cable insulating transition joint local discharge test device and using method |
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| CN201310211359.9A CN103308832B (en) | 2013-05-31 | 2013-05-31 | A kind of high-voltage cable insulating transition joint local discharge test device and using method |
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| CN103308832A true CN103308832A (en) | 2013-09-18 |
| CN103308832B CN103308832B (en) | 2016-05-04 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558532A (en) * | 2013-11-20 | 2014-02-05 | 国家电网公司 | Partial discharge on-line detection system of high-voltage crosslinked polyethylene power cable |
| CN103558534A (en) * | 2013-11-20 | 2014-02-05 | 国家电网公司 | Two-dimensional Weibull parameter spectrum clustering method of high voltage cable discharge signal |
| CN105913738A (en) * | 2016-06-08 | 2016-08-31 | 云南电网有限责任公司昆明供电局 | High voltage cable outer sheath troubleshooting simulation teaching device |
| CN106054098A (en) * | 2016-08-16 | 2016-10-26 | 国网天津市电力公司 | Partial discharge on-site calibration method for high-voltage cable line GIS terminal |
| WO2016190823A1 (en) | 2015-05-28 | 2016-12-01 | Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ | Link box with built-in partial discharge sensor |
| CN106716760A (en) * | 2014-07-18 | 2017-05-24 | 普睿司曼股份公司 | Electrical cable link apparatus and electrical cable system comprising the apparatus |
| CN108344928A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | A kind of power cable local discharge on-line monitoring device and method |
| CN108344927A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | A kind of power cable partial discharge monitoring device and method |
| CN108344925A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | A kind of power cable partial discharge monitoring device and method |
| CN108344926A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | A kind of power cable local discharge on-line monitoring device and method |
| CN105717428B (en) * | 2016-02-19 | 2018-09-04 | 西安交通大学 | A kind of cable partial discharge live correction method based on HFCT |
| US11183828B1 (en) | 2020-06-12 | 2021-11-23 | hvGrid-tech Inc. | Device with health monitoring |
| WO2022110907A1 (en) * | 2020-11-26 | 2022-06-02 | 国网上海市电力公司 | Partial discharge detection device and method based on cross-connection case |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558534A (en) * | 2013-11-20 | 2014-02-05 | 国家电网公司 | Two-dimensional Weibull parameter spectrum clustering method of high voltage cable discharge signal |
| CN103558534B (en) * | 2013-11-20 | 2016-01-20 | 国家电网公司 | The two-dimentional Weibull Parameter Spectrum clustering method of high-tension cable discharge signal |
| CN103558532A (en) * | 2013-11-20 | 2014-02-05 | 国家电网公司 | Partial discharge on-line detection system of high-voltage crosslinked polyethylene power cable |
| CN106716760A (en) * | 2014-07-18 | 2017-05-24 | 普睿司曼股份公司 | Electrical cable link apparatus and electrical cable system comprising the apparatus |
| US10401416B2 (en) | 2014-07-18 | 2019-09-03 | Prysmian S.P.A | Electrical cable link apparatus and electrical cable system comprising the apparatus |
| WO2016190823A1 (en) | 2015-05-28 | 2016-12-01 | Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ | Link box with built-in partial discharge sensor |
| CN105717428B (en) * | 2016-02-19 | 2018-09-04 | 西安交通大学 | A kind of cable partial discharge live correction method based on HFCT |
| CN105913738A (en) * | 2016-06-08 | 2016-08-31 | 云南电网有限责任公司昆明供电局 | High voltage cable outer sheath troubleshooting simulation teaching device |
| CN105913738B (en) * | 2016-06-08 | 2018-09-07 | 云南电网有限责任公司昆明供电局 | A kind of high-tension cable oversheath trouble shoot simulation teching device |
| CN106054098A (en) * | 2016-08-16 | 2016-10-26 | 国网天津市电力公司 | Partial discharge on-site calibration method for high-voltage cable line GIS terminal |
| CN106054098B (en) * | 2016-08-16 | 2019-01-15 | 国网天津市电力公司 | Voltage Cable Lines Construction GIS terminal shelf depreciation field calibration method |
| CN108344926A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | A kind of power cable local discharge on-line monitoring device and method |
| CN108344925A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | A kind of power cable partial discharge monitoring device and method |
| CN108344927A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | A kind of power cable partial discharge monitoring device and method |
| CN108344928A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | A kind of power cable local discharge on-line monitoring device and method |
| CN108344925B (en) * | 2017-01-24 | 2021-04-06 | 中国石油化工股份有限公司 | Power cable partial discharge monitoring device and method |
| US11183828B1 (en) | 2020-06-12 | 2021-11-23 | hvGrid-tech Inc. | Device with health monitoring |
| WO2022110907A1 (en) * | 2020-11-26 | 2022-06-02 | 国网上海市电力公司 | Partial discharge detection device and method based on cross-connection case |
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| CN103308832B (en) | 2016-05-04 |
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