CN203658430U - Capacitive equipment insulation online monitoring and electrification test integrated sampling protection device - Google Patents

Capacitive equipment insulation online monitoring and electrification test integrated sampling protection device Download PDF

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Publication number
CN203658430U
CN203658430U CN201320880627.1U CN201320880627U CN203658430U CN 203658430 U CN203658430 U CN 203658430U CN 201320880627 U CN201320880627 U CN 201320880627U CN 203658430 U CN203658430 U CN 203658430U
Authority
CN
China
Prior art keywords
line monitoring
capacitive
condctor
shield
sampling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201320880627.1U
Other languages
Chinese (zh)
Inventor
高树国
陈志勇
潘瑾
范辉
刘宏亮
杜大全
赵建利
孙祎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
Hebei Electric Power Construction Adjustment Test Institute
Original Assignee
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
Hebei Electric Power Construction Adjustment Test Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd, Hebei Electric Power Construction Adjustment Test Institute filed Critical State Grid Corp of China SGCC
Priority to CN201320880627.1U priority Critical patent/CN203658430U/en
Application granted granted Critical
Publication of CN203658430U publication Critical patent/CN203658430U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a capacitive equipment insulation online monitoring and electrification test integrated sampling protection device. The capacitive equipment insulation online monitoring and electrification test integrated sampling protection device comprises a shielding shell as well as an on-line monitoring sampling sensor, a discharge tube, a short-circuiting sheet, a knife switch and a single-core conductor with a shielding layer which are arranged inside the shielding shell; the single-core conductor with the shielding layer is composed of a single-core conductor and an outer shielding layer wrapping thereon, wherein the outer shielding layer is grounded; one end of the single-core conductor is fixed on an end screen point of capacitive equipment, and the other end of the single-core conductor passes through a small hole in the shielding shell and thereafter is divided into three branches; the three branches are connected with the discharge tube, the short-circuiting sheet and the knife switch respectively and thereafter are converged and are connected onto the shielding shell, and then are grounded; the single-core conductor passes through a primary coil of the on-line monitoring sampling sensor; a lead-out wire of a second primary of the on-line monitoring sampling sensor extends out from the shielding shell and then is connected with an on-line monitoring device; and the single-core conductor is connected with a lead terminal connected with an electrification test instrument. The capacitive equipment insulation online monitoring and electrification test integrated sampling protection device can satisfy a requirement of online monitoring and a requirement of electrification testing for end screen current signals of tested equipment.

Description

Capacitive apparatus insulated on-line monitoring and live testing integrative sampling protective device
Technical field
The utility model relates to electrical equipment online monitoring and live testing technical field, relates in particular to the capacitive apparatus insulated on-line monitoring of a kind of transformer station and live testing integrative sampling protective device.
Background technology
Along with electric system is to super (spy) high pressure, large capacity, large System Development, the safe operation of electric system is increasing on the impact of national economy and people's lives.And electrical equipment is the primary element of composition electric system, be to ensure the basis of power supply reliability, the safe operation of electrical equipment is the prerequisite of power system security, stable, economical operation.Along with developing rapidly of the technology such as sensor, optical fiber, computing machine, under running status, the state of insulation of high voltage electric equipment being carried out to real-time on-line monitoring or live testing can the operating abundant information of equipment, understands the real-time state of insulation of high voltage electric equipment.Insulation of electrical installation on-line monitoring and live testing are the Site Detection under equipment running status, apparatus insulated quantity of state being carried out, utilize the equipment such as sensor, robot calculator, by the collection to high voltage equipment insulation status signal in service, transmission and processing, realize the detection to insulation of electrical installation state.
Concerning capacitive apparatus, dielectric dissipation factor and electric capacity are the key parameters of judgment device running status.The technical way that capacitive apparatus medium loss factor and electric capacity on-line monitoring and live testing are taked is at present to extract the end shield ground current of tested device and reference device by centre path current sensor or special sampling box, and then analyzes relative dielectric loss and the electric capacity of the equipment that draws.Two kinds of sampling modes respectively have relative merits, there is application at scene, in general, when on-line monitoring because needs are measured for a long time, adopt sensor/sensor sampling to guarantee the safety ground of end shield loop, after equipment has a power failure, equipment end shield ground wire is opened, punching sampling detector is installed, and then equipment end shield ground wire is restored, when normally moving, equipment carries out on-line monitoring.It when live testing, is raising accuracy of measurement, extract end shield ground current by special sampling box, when equipment has a power failure, end shield ground wire is transformed, seal in sampling box at end shield ground wire, the safety simultaneously using in order to ensure scene, prevent that unexpected (as the measurement lead-in wire disconnection of testing instrument for electrified) causes equipment end shield open circuit, increases the short circuit sheet and the discharge tube that are in parallel with live testing lead terminal.When live testing, by opening short circuit sheet, equipment end shield ground current is introduced in testing instrument for electrified, after testing, short circuit sheet is recovered again, discharge tube shields in live testing process and equipment running process.
For meeting the needs of capacitive apparatus band electro-detection and on-line monitoring, scene often needs in end shield ground loop, to access a sampling box simultaneously, and a straight-through current transformer is installed simultaneously, because sampling box need to adopt the extraordinary ground wire of shielding properties, can affect the measuring accuracy of punching current transformer, comparatively difficulty of on-the-spot installation simultaneously, and caused great investment repetition and waste.
Utility model content
Technical problem to be solved in the utility model has been to provide a kind of integrative sampling protective device of taking into account capacitive apparatus insulated on-line monitoring and the two function of live testing, meets the dual needs that on-line monitoring and live testing obtain equipment under test end shield current signal.
The utility model solves the technical scheme that its technical matters adopts:
The utility model comprises openable shield shell, is arranged in the on-line monitoring sampling detector of shield shell, discharge tube, short circuit sheet, knife switch and the single condctor with screen layer; The described single condctor with screen layer is made up of single condctor and parcel shield external layer thereon; Described shield external layer ground connection; The end shield point of capacitive apparatus is fixed in described single condctor one end, and its other end is divided into three branch roads after through the aperture on shield shell, and described three branch roads connect respectively discharge tube, short circuit sheet and knife switch and then converge and be connected on shield shell ground connection again; Described single condctor is through the primary winding of on-line monitoring sampling detector, and the extension line of the secondary coil of described on-line monitoring sampling detector connects on-Line Monitor Device after passing shield shell; Described single condctor is provided with the lead terminal for connecting band electric tester.
The utility model also comprises bakelite plate, and described on-line monitoring sampling detector, discharge tube, short circuit sheet and knife switch are all fixed on bakelite plate, and described bakelite plate is installed in shield shell.
Described shield shell is shielding aluminium box.
Described on-line monitoring sampling detector is straight-through current transformer.
The good effect that the utility model produces is as follows: (1) the utility model can meet the needs that the capacitive apparatus insulated on-line monitoring of transformer station and live testing obtain equipment under test end shield current signal simultaneously, and simple in structure, easily field conduct; (2) signal acquisition is reliable and stable, and antijamming capability is strong, and accuracy of measurement is high, and security is simultaneously good, and the risk that multiple protection measure can avoid end shield ground loop to disconnect is set.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present utility model.
Wherein, the lead terminal of the secondary coil of the primary winding of 1 shield shell, 2-1 on-line monitoring sampling detector, 2-2 on-line monitoring sampling detector, 3 discharge tubes, 4 short circuit sheets, 5 knife switches, 6 single condctors, 7 shield external layers, 8-1 ~ 8-2 testing instrument for electrified.
Embodiment
Below in conjunction with accompanying drawing 1 and embodiment, the present invention is further described:
The present embodiment comprises openable shield shell 1, is arranged in the on-line monitoring sampling detector of shield shell 1, discharge tube 3, short circuit sheet 4, knife switch 5 and the single condctor with screen layer; The described single condctor with screen layer is made up of single condctor 6 and parcel shield external layer 7 thereon; Described shield external layer 7 ground connection; The end shield point of capacitive apparatus is fixed in described single condctor 6 one end, its other end is divided into three branch roads after through the aperture on shield shell 1, and described three branch roads connect respectively discharge tube 3, short circuit sheet 4 and knife switch 5 and then converge and be connected on shield shell 1 ground connection again; Described single condctor 6, through the primary winding 2-1 of on-line monitoring sampling detector, connects on-Line Monitor Device after the extension line of the secondary coil 2-2 of described on-line monitoring sampling detector passes shield shell 1; Described single condctor 6 is provided with the lead terminal 8-1 ~ 8-2 for connecting band electric tester.
The utility model also comprises bakelite plate, and described on-line monitoring sampling detector, discharge tube 3, short circuit sheet 4 and knife switch 5 are all fixed on bakelite plate, and described bakelite plate is installed in shield shell 1.
Described shield shell 1 is shielding aluminium box.
Described on-line monitoring sampling detector is straight-through current transformer.
The course of work of the present utility model:
When equipment normally moves, short circuit sheet 4 and knife switch 5 are all in closure state, on-Line Monitor Device is drawn equipment under test end shield current signal by on-line monitoring sampling detector 2 by the extension line of the secondary coil of on-line monitoring sampling detector 2, this working method meets the needs of on-line monitoring function.
When live testing, closed knife switch 5, first the ground wire of testing instrument for electrified is connected to the lead terminal 8-2 of the testing instrument for electrified on single condctor 6, be connected with ground terminal, then the signal wire of testing instrument for electrified is connected to the lead terminal 8-1 of the testing instrument for electrified on single condctor 6, again short circuit sheet 4 and knife switch 5 are placed in respectively to open mode, now equipment end shield current signal is linked in testing instrument for electrified, meets the needs of live testing function.Live testing after hours, first short circuit sheet 4 and knife switch 5 are reverted to closure state, then the lead terminal 8-1 of the testing instrument for electrified on the signal wire of testing instrument for electrified and single condctor 6 is disconnected, finally the lead terminal 8-2 of the testing instrument for electrified on the ground wire of testing instrument for electrified and single condctor 6 is disconnected.
The utility model can meet the needs that the capacitive apparatus insulated on-line monitoring of transformer station and live testing obtain equipment under test end shield current signal simultaneously, and simple in structure, easily field conduct.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all any amendments of making within spirit of the present utility model and principle, be equal to and replace and improvement etc., within being all included in protection domain of the present utility model.

Claims (4)

1. capacitive apparatus insulated on-line monitoring and a live testing integrative sampling protective device, is characterized in that: comprise openable shield shell (1), be arranged in on-line monitoring sampling detector, discharge tube (3), short circuit sheet (4), knife switch (5) and the single condctor with screen layer of shield shell (1); The described single condctor with screen layer is made up of single condctor (6) and parcel shield external layer (7) thereon; Described shield external layer (7) ground connection; The end shield point of capacitive apparatus is fixed in described single condctor (6) one end, its other end is divided into three branch roads after through the aperture on shield shell (1), and described three branch roads connect respectively discharge tube (3), short circuit sheet (4) and knife switch (5) and then converge and be connected on shield shell (1) ground connection again; Described single condctor (6), through the primary winding (2-1) of on-line monitoring sampling detector, connects on-Line Monitor Device after the extension line of the secondary coil (2-2) of described on-line monitoring sampling detector passes shield shell (1); Described single condctor (6) is provided with the lead terminal (8-1 ~ 8-2) for connecting band electric tester.
2. capacitive apparatus insulated on-line monitoring according to claim 1 and live testing integrative sampling protective device; it is characterized in that: also comprise bakelite plate; described on-line monitoring sampling detector, discharge tube (3), short circuit sheet (4) and knife switch (5) are all fixed on bakelite plate, and described bakelite plate is installed in shield shell (1).
3. capacitive apparatus insulated on-line monitoring according to claim 2 and live testing integrative sampling protective device, is characterized in that: described shield shell (1) is shielding aluminium box.
4. capacitive apparatus insulated on-line monitoring according to claim 3 and live testing integrative sampling protective device, is characterized in that: described on-line monitoring sampling detector is straight-through current transformer.
CN201320880627.1U 2013-12-30 2013-12-30 Capacitive equipment insulation online monitoring and electrification test integrated sampling protection device Expired - Fee Related CN203658430U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320880627.1U CN203658430U (en) 2013-12-30 2013-12-30 Capacitive equipment insulation online monitoring and electrification test integrated sampling protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320880627.1U CN203658430U (en) 2013-12-30 2013-12-30 Capacitive equipment insulation online monitoring and electrification test integrated sampling protection device

Publications (1)

Publication Number Publication Date
CN203658430U true CN203658430U (en) 2014-06-18

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Country Status (1)

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CN (1) CN203658430U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105203881A (en) * 2015-09-18 2015-12-30 国家电网公司 Terminal box for high-voltage equipment insulation and electrification testing and testing method
CN107219489A (en) * 2016-08-31 2017-09-29 广州供电局有限公司 Monitor Intelligent current transformer on-line
CN107229030A (en) * 2016-08-31 2017-10-03 广州供电局有限公司 Monitor Intelligent current transformer on-line

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105203881A (en) * 2015-09-18 2015-12-30 国家电网公司 Terminal box for high-voltage equipment insulation and electrification testing and testing method
CN107219489A (en) * 2016-08-31 2017-09-29 广州供电局有限公司 Monitor Intelligent current transformer on-line
CN107229030A (en) * 2016-08-31 2017-10-03 广州供电局有限公司 Monitor Intelligent current transformer on-line

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140618

Termination date: 20161230