CN103308832B - A kind of high-voltage cable insulating transition joint local discharge test device and using method - Google Patents

A kind of high-voltage cable insulating transition joint local discharge test device and using method Download PDF

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Publication number
CN103308832B
CN103308832B CN201310211359.9A CN201310211359A CN103308832B CN 103308832 B CN103308832 B CN 103308832B CN 201310211359 A CN201310211359 A CN 201310211359A CN 103308832 B CN103308832 B CN 103308832B
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China
Prior art keywords
cable
insulation
current sensor
frequency current
connector
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CN201310211359.9A
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Chinese (zh)
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CN103308832A (en
Inventor
周凤争
张东斐
朱晓辉
刘宝成
郭勇
孟峥峥
齐效华
王浩鸣
李旭
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国家电网公司
天津市电力公司
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Priority to CN201310211359.9A priority Critical patent/CN103308832B/en
Publication of CN103308832A publication Critical patent/CN103308832A/en
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Abstract

The present invention relates to a kind of high-voltage cable insulating transition joint local discharge test device, two tie points that described each cross interconnected case is connected with same insulation intermediate connector connect respectively one end of a cable, this cable middle part turns to multiturn coil, in this coil, install a High Frequency Current Sensor, the output of this High Frequency Current Sensor connects measurement of partial discharge equipment. In the present invention, connect by cable two tie points that each is connected with insulation intermediate connector, realize the shelf depreciation band electro-detection of insulation intermediate connector by the output of High Frequency Current Sensor, avoided in prior art cross interconnected case and in flakes dimensional standard differ, cannot place the defect of High Frequency Current Sensor, test process is rapid, very convenient.

Description

A kind of high-voltage cable insulating transition joint local discharge test device and using method
Technical field
The invention belongs to high-voltage cable insulating transition joint local discharge test device field, in especially a kind of high-voltage cable insulatingBetween joint local discharge test device and using method.
Background technology
Power industry standard DL/T5221-2005 " urban electric power cable run designing technique regulation " and enterprise of State Grid Corporation of ChinaIndustry standard Q/GDW512-2010 " power cable line operating standard " regulation: the metallic shield ground connection side of cable metal jacketThe selection of formula should meet the following requirements: (1) cable run shorter and meet induced voltage regulation require time, can take at circuit oneHold direct ground connection and at the other end through overvoltage limiter ground connection, or the direct ground connection of middle part single-point and limitting through overvoltage at two endsDevice ground connection processed. (2) cable run beyond above-mentioned situation, should be evenly divided into cable run three sections or three multiple section, adoptsImplement cross interconnected ground connection with insulating joint.
110kV and the cross interconnected earthing mode of above Voltage Cable Lines Construction as shown in Figure 1, comprise high-tension cable 2, electricityCable terminals 1, insulation intermediate connector 3 and cross interconnected case 5, between cable terminal and rightmost insulation intermediate connector twoIndividual insulation intermediate connector connects a cross interconnected case by wire 4 respectively, and six tie points are set in each cross interconnected case,Three tie points that are arranged in top are connected with the insulation intermediate connector left side of threephase cable respectively, are positioned at three tie points of belowBe connected with the insulation intermediate connector right side in threephase cable respectively, interconnection between two groups of tie points of above and below, is positioned atThree tie points of below are all by sheath protector ground connection.
In test, cross interconnected case in flakes on High Frequency Current Sensor be installed detect the high frequency partial electric discharge arteries and veins in earth currentRush current signal, evaluate the running status of cable termination, but in real process, due to the interconnected case of each producer and chi in flakesVery little different with standard, exist in flakes too wide, sensor wear to enter, and chest space is too little, in flakes between distance too near,The situations such as not reserved sensor space, cause measuring local discharge signal.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of high-voltage cable insulating rational in infrastructure, convenient operation is providedTransition joint local discharge test device.
The technical scheme that the present invention takes is:
A kind of high-voltage cable insulating transition joint local discharge test device, comprises three high-tension cables, insulation intermediate connector and friendshipsPitch interconnected case, three insulation intermediate connectors are installed on every high-tension cable, wherein two insulation intermediate connectors connect respectively by cableConnect a cross interconnected case, it is characterized in that: two connections that described each cross interconnected case is connected with same insulation intermediate connectorPoint connects respectively one end of a cable, and this cable middle part turns to multiturn coil, installs a High Frequency Current Sensor in this coil,The output 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 measurement category that the number of turn of described coil is High Frequency Current Sensor is divided by flowing through in the cable in parallel with tie pointCurrent value.
Another object of the present invention is to provide a kind of using method of high-voltage cable insulating transition joint local discharge test device,It is characterized in that: comprise the following steps:
(1) a tie point that one end of cable and cross interconnected case is positioned to top is connected;
(2) make the middle part of cable repeatedly be wrapped in High Frequency Current Sensor;
(3) the other end of cable and cross interconnected case are positioned at below and with step (1) described in tie point be connected same insulation indirectAnother tie point of head connects;
By the output of High Frequency Current Sensor by coaxial signal line and measurement of partial discharge equipment connection;
(5) complete the shelf depreciation band electro-detection of an insulation intermediate connector in a phase high-tension cable;
Repeating step (1)~(5), complete the shelf depreciation band electro-detection of insulation intermediate connector in all phase high-tension cables.
Advantage of the present invention and good effect are:
In the present invention, connect by cable two tie points that each is connected with insulation intermediate connector, by high frequency electric sensingThe output of device realizes the shelf depreciation band electro-detection of insulation intermediate connector, has avoided in prior art cross interconnected case and chi in flakesVery little standard differs, and cannot place the defect of High Frequency Current Sensor, and test process is rapid, very convenient.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described, and following embodiment is illustrative, is not determinate, can notLimit protection scope of the present invention with following embodiment.
A kind of high-voltage cable insulating transition joint local discharge test device, as shown in Figure 1, comprises three high-tension cables 2, insulationTransition joint 3 and cross interconnected case 5, install three insulation intermediate connectors on every high-tension cable, wherein two insulation indirectHead connects respectively a cross interconnected case by cable, and innovation of the present invention is: described each cross interconnected case and same insulationTwo tie points 6,7 that transition joint connects connect respectively one end of a cable 11, and this cable middle part turns to multiturn coil 12,In this coil, install a High Frequency Current Sensor 10, the output 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. DescribedThe number of turn N of coil be the measurement category M of High Frequency Current Sensor divided by the current value I flowing through in the cable in parallel with tie point,Be N=M/I.
The using method of above-mentioned high-voltage cable insulating transition joint local discharge test device, comprises the following steps:
(1) a tie point that one end of cable and cross interconnected case is positioned to top is connected;
(2) make the middle part of cable repeatedly be wrapped in High Frequency Current Sensor;
(3) the other end of cable and cross interconnected case are positioned at below and with step (1) described in tie point be connected same insulation indirectAnother tie point of head connects;
By the output of High Frequency Current Sensor by coaxial signal line and measurement of partial discharge equipment connection;
(5) complete the shelf depreciation band electro-detection of an insulation intermediate connector in a phase high-tension cable;
Repeating step (1)~(5), complete the shelf depreciation band electro-detection of insulation intermediate connector in all phase high-tension cables.
In the present invention, connect by cable two tie points that each is connected with insulation intermediate connector, by high frequency electric sensingThe output of device realizes the shelf depreciation band electro-detection of insulation intermediate connector, has avoided in prior art cross interconnected case and chi in flakesVery little standard differs, and cannot place the defect of High Frequency Current Sensor, and test process is rapid, very convenient.

Claims (1)

1. a high-voltage cable insulating transition joint local discharge test device, comprise three high-tension cables, insulation intermediate connector and cross interconnected case, wherein two insulation intermediate connectors in three insulation intermediate connectors installing on every high-tension cable are connected to same cross interconnected case by cable, it is characterized in that: two tie points that each described cross interconnected case is connected with same insulation intermediate connector connect respectively one end of same cable, this cable middle part turns to multiturn coil, in this coil, install a High Frequency Current Sensor, the output of this High Frequency Current Sensor connects measurement of partial discharge equipment,
Described High Frequency Current Sensor connects described measurement of partial discharge equipment by coaxial signal line;
The number of turn of described coil is that the measurement category of High Frequency Current Sensor is divided by the current value flowing through in the cable in parallel with tie point;
The using method of this device comprises the following steps:
(1) a tie point that one end of cable and cross interconnected case is positioned to top is connected;
(2) make the middle part of cable repeatedly be wrapped in High Frequency Current Sensor;
(3) the other end of cable and cross interconnected case are positioned at below and with step (1) described in tie point another tie point of being connected same insulation intermediate connector connect;
By the output of High Frequency Current Sensor by coaxial signal line and measurement of partial discharge equipment connection;
(5) complete the shelf depreciation band electro-detection of an insulation intermediate connector in a phase high-tension cable;
Repeating step (1)~(5), complete the shelf depreciation band electro-detection of insulation intermediate connector in all phase high-tension cables.
CN201310211359.9A 2013-05-31 2013-05-31 A kind of high-voltage cable insulating transition joint local discharge test device and using method CN103308832B (en)

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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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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
WO2016008542A1 (en) 2014-07-18 2016-01-21 Prysmian S.P.A. Electrical cable link apparatus and electrical cable system comprising the apparatus
GB2543467B (en) 2015-05-28 2021-03-03 Em Elektrik Malzemeleri Yuklenim Sanayi Ticaret Anonim Sirketi 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
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
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
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
CN108344926B (en) * 2017-01-24 2021-04-06 中国石油化工股份有限公司 Power cable partial discharge online monitoring device and method
CN108344928B (en) * 2017-01-24 2021-04-06 中国石油化工股份有限公司 Power cable partial discharge online monitoring device and method
CN108344927B (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

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