CN201251622Y - Heavy current up-flow aggregate unit for field test of 750v current transformator - Google Patents

Heavy current up-flow aggregate unit for field test of 750v current transformator Download PDF

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Publication number
CN201251622Y
CN201251622Y CNU2008200303131U CN200820030313U CN201251622Y CN 201251622 Y CN201251622 Y CN 201251622Y CN U2008200303131 U CNU2008200303131 U CN U2008200303131U CN 200820030313 U CN200820030313 U CN 200820030313U CN 201251622 Y CN201251622 Y CN 201251622Y
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CN
China
Prior art keywords
current
lifting device
device unit
flow
series
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 - Lifetime
Application number
CNU2008200303131U
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Chinese (zh)
Inventor
杨晓西
刘安彦
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 Shanxi Electric Power Co Ltd
Original Assignee
Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd
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.)
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Publication date
Application filed by Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd filed Critical Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd
Priority to CNU2008200303131U priority Critical patent/CN201251622Y/en
Application granted granted Critical
Publication of CN201251622Y publication Critical patent/CN201251622Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a heavy current up-flow aggregate unit for field test of a 750v current transformator, which consists of a plurality of independent up-flow device units adopting ring-shaped iron cores and wire transposition enwinding output windings; the ends of input windings of all the up-flow device units are connected in parallel, and the ends of output windings are connected with each other by the way of connection in series, parallel connection or the mixed way of series-parallel connection; each of the up-flow device units adopts a rust prevention aluminium plate as a box body, and a corrosion resistant plate as a face plate. The heavy current up-flow aggregate unit is characterized in that the problems of current supply of heavy load cranking test and heavy current up-flow used for 750kv GIS, HGIS and can type switch current transformator field test; the heavy current up-flow aggregate unit has the advantages of simple and reasonable structure, convenient transportation and field installation use, good field test detection effect, and the like.

Description

The 750kV current mutual inductor on site is tested with big electric current up-flow composite set
Technical field
The utility model belongs to the general equipment technical field of power frequency extra-high voltage high-current test, relate to a kind of combination test apparatus that is used for on-the-spot big electric current up-flow, particularly a kind of big electric current up-flow composite set that is applicable to 750kV GIS, HGIS and pot type switching current mutual inductor on site test usefulness, its design philosophy also can be applicable to the high-current equipment temperature rise or does the aspects such as current source of other test.
Background technology
Along with the foundation successively of the 750kV of the Northwest electrical network, the electric weight of AC extra high voltage electrical network exchange clearing are evaluated at the scene detection that all many-sides all will depend on voltage transformer (VT) summation current transformer error characteristics with grid loss.
At present, China 750kV transformer station comprises two types of open type transformer station and GIS gas-insulated prefabricated substations.500kV transformer station adopted free-standing current transformer in the past, the on-the-spot detection than being easier to, it is also relatively more smooth that work is carried out, but the potting breaker of 750kV level and above electric pressure belt current mutual inductor and GIS station are bigger because of the test loop impedance, test current will reach more than the 4kA, the test difficulty is very big, and in other words, the current value that the current mutual inductor on site test applies is difficult to reach ratings.In recent years, though a large amount of work has been done by units such as Wuhan High Voltage Research Institute Of State Grid, Shandong Electric Power Group experimental study mechanism, Sichuan Electric Power Testing Inst. on aspects such as theory and engineering construction, test loop current boost is to 3kA but site test is also only stood 500kVGIS, and test current can not reach accuracy and the reliability that ratings will directly influence the electrical network electric energy metrical.500kVGIS station, area, Sichuan, once be that to do tap be to find in the error testing under the 2kA electric current that fundamental error is overproof bigger for the current transformer of 4kA in rated current, when 3kA, the fundamental error curve is offset, higher test current then can not carry out fully because of the equipment reason, can only once enlarge (4.8kA) under the electric current with theoretical calculate, this mutual inductor may be seriously overproof.
On the other hand, existing big electric current up-flow equipment all is configured in the special-purpose laboratory, owing to require to have enough capacity, must power and fixing the use by the special line power supply, detect as it being directly used in the big electric current site test of big load, exist bulkyly can't transport, equipment external force resistance impact is poor, heat dispersion is poor, install put the place limited, be difficult to solve the site safety wiring () and problem such as power supply capacity disposes and equipment eddy current loss and temperature rise phenomenon be serious.
The utility model content
The purpose of this utility model is the problem that prior art exists is solved, so provide a kind of simple and reasonable, be convenient to transport and on-the-spot install and use, test detect effective 750kV current mutual inductor on site test with big electric current up-flow composite set.
The technical solution that adopts is so for achieving the above object: the independently current lifting device unit that the 750kV current mutual inductor on site test that is provided is exported winding with big electric current up-flow composite set by a plurality of employing ring-shaped cores and wire transposition coiling is formed, the input winding terminal of each current lifting device unit is parallel with one another, and the output winding terminal links by series, parallel or connection in series-parallel hybrid mode; Each current lifting device unit all adopts rustproof aluminium sheet to make casing, and adopts corrosion resistant plate to make panel.In the practical application, series, parallel or connection in series-parallel hybrid mode by many current lifting device unit are formed big electric current up-flow composite set, make equipment when obtaining required output current and output voltage, device structure is simplified, thereby solved transportation, external force resistance impact, heat radiation, safety ground, eddy current loss and the problem of temperature rise of high-current equipment fully.
Characteristics of the present utility model are by output voltage height under big current conditions, and then solved the current source problem of big load cranking test, its core is to have solved the test of 750kV GIS, HGIS and pot type switching current mutual inductor on site with big electric current up-flow problem, the practicing of this device changed the present situation that the above current transformer of the 4kA of China 750kV transformer station can not detect with direct method, made contribution accurately and reliably for the national energy metering.
Description of drawings
Fig. 1 is embodiment of the utility model---the structural representation of full tandem type up-flow composite set.
Fig. 2 is another embodiment of the utility model---the structural representation of full parallel connection type up-flow composite set.
Figure 32 is the 3rd embodiment of the utility model---the structural representation of connection in series-parallel mixed type up-flow composite set.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further, but actual fabrication structure of the present utility model is not limited in illustrated embodiment.
Referring to accompanying drawing, 750kV current mutual inductor on site described in the utility model test with big electric current up-flow composite set by have same model and same structure 2~10 independently the current lifting device unit form (consideration current lifting device internal resistance coupling and output efficiency, suggestion current lifting device unit number is smaller or equal to 10), each unit all adopts rustproof aluminium sheet to make casing, corrosion resistant plate is made panel, thereby has solved transportation, external force resistance impact, heat radiation, safety ground, eddy current loss and the problem of temperature rise of high-current equipment.On project organization, each current lifting device unit adopts ring-shaped core, and the method for output winding employing multiple conducting wires transposition coiling evenly is wound on the technology on the ring-shaped core, and has all carried out special insulation processing between every lead, draws with aluminium row then.This kind structure can reduce current lifting device unit leakage reactance, reduce internal loss, reduce the contact resistance of outside primary circuit wiring, thereby realized effective transmission of energy, the kelvin effect when having solved the big electric current in current lifting device unit simultaneously and effectively avoided the excitatory inhomogeneous unshakable in one's determination local saturated phenomenon that causes.On the device connected mode, each current lifting device unit is provided with two groups and independently exports winding, links by series, parallel or connection in series-parallel hybrid mode between the identical output winding in each current lifting device unit end of the same name, can make output obtain more composite type like this.In addition, on the input winding of each current lifting device unit, all have additional the compensation tapping, be used to change the circle voltage of winding, thereby regulate output voltage, can guarantee like this when certain capacity, to obtain maximum output current, and need not change the mode of connection of current lifting device group.
Accompanying drawing is an example in the various combination mode of four current lifting device unit, and the typical case who describes device described in the utility model uses.
The typical case uses one: as shown in Figure 1, and each current lifting device unit T 1, T 2, T 3, T 4Output winding terminal L 1, L 2All series connection, input winding terminal S-S 3Parallel connection can be formed output ceiling voltage 240V, the up-flow device of minimum output current 2.5kA by this principle wiring.
The typical case uses two: as shown in Figure 2, and each current lifting device unit T 1, T 2, T 3, T 4Output winding terminal L 1, L 2All in parallel, input winding terminal S-S 3Parallel connection can be formed output minimum voltage 30V, the up-flow device of maximum output current 10kA by this principle wiring.
The typical case uses three: each current lifting device unit T 1, T 2, T 3, T 4Output winding terminal L 1, L 2Connect by connection in series-parallel hybrid mode shown in Figure 3, can form output voltage 120V by this schematic diagram wiring, the up-flow device of output current 5kA.

Claims (3)

1, a kind of 750kV current mutual inductor on site is tested with big electric current up-flow composite set, it is characterized in that it is made up of the independently current lifting device unit of a plurality of employing ring-shaped cores and wire transposition coiling output winding, the input winding terminal of each current lifting device unit is parallel with one another, and the output winding terminal links by series, parallel or connection in series-parallel hybrid mode; Each current lifting device unit all adopts rustproof aluminium sheet to make casing, and adopts corrosion resistant plate to make panel.
2,750kV current mutual inductor on site according to claim 1 is tested with big electric current up-flow composite set, it is characterized in that each current lifting device unit is provided with two groups and independently exports winding, link by series, parallel or connection in series-parallel hybrid mode between the identical output winding in each current lifting device unit end of the same name.
3,750kV current mutual inductor on site test according to claim 1 is characterized in that all having additional the compensation tapping on the input winding of each current lifting device unit with big electric current up-flow composite set.
CNU2008200303131U 2008-09-19 2008-09-19 Heavy current up-flow aggregate unit for field test of 750v current transformator Expired - Lifetime CN201251622Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200303131U CN201251622Y (en) 2008-09-19 2008-09-19 Heavy current up-flow aggregate unit for field test of 750v current transformator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200303131U CN201251622Y (en) 2008-09-19 2008-09-19 Heavy current up-flow aggregate unit for field test of 750v current transformator

Publications (1)

Publication Number Publication Date
CN201251622Y true CN201251622Y (en) 2009-06-03

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105044408A (en) * 2015-06-30 2015-11-11 国家电网公司 High-current current boosting device for ultrahigh-voltage current transformer calibration
CN106291048A (en) * 2016-07-28 2017-01-04 国家电网公司 A kind of current boost device, current transformer and current test method
CN107749726A (en) * 2017-10-17 2018-03-02 云南电网有限责任公司电力科学研究院 A kind of GIS detecting current transformers flow up device and up-flow calibrating circuit with high current
CN111443323A (en) * 2020-04-26 2020-07-24 国网福建省电力有限公司 30000A current transformer field mobile calibration system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105044408A (en) * 2015-06-30 2015-11-11 国家电网公司 High-current current boosting device for ultrahigh-voltage current transformer calibration
CN105044408B (en) * 2015-06-30 2017-12-19 国家电网公司 A kind of extra-high voltage detecting current transformer flows up device with high current
CN106291048A (en) * 2016-07-28 2017-01-04 国家电网公司 A kind of current boost device, current transformer and current test method
CN107749726A (en) * 2017-10-17 2018-03-02 云南电网有限责任公司电力科学研究院 A kind of GIS detecting current transformers flow up device and up-flow calibrating circuit with high current
CN111443323A (en) * 2020-04-26 2020-07-24 国网福建省电力有限公司 30000A current transformer field mobile calibration system

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C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: SHAANXI ELECTRIC POWER RESEARCH INSTITUTE

Effective date: 20140327

Owner name: STATE GRID CORPORATION OF CHINA

Free format text: FORMER OWNER: SHAANXI ELECTRIC POWER RESEARCH INSTITUTE

Effective date: 20140327

C41 Transfer of patent application or patent right or utility model
COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 710054 XI'AN, SHAANXI PROVINCE TO: 100761 XICHENG, BEIJING

TR01 Transfer of patent right

Effective date of registration: 20140327

Address after: 100761 West Chang'an Avenue, Beijing, No. 86, No.

Patentee after: State Grid Corporation of China

Patentee after: Shaanxi Electric Power Research Institute

Address before: 710054 No. 308 Youyi East Road, Shaanxi, Xi'an

Patentee before: Shaanxi Electric Power Research Institute

CX01 Expiry of patent term

Granted publication date: 20090603

CX01 Expiry of patent term