CN2248380Y - Current mutual inductor with function of on-line detection - Google Patents
Current mutual inductor with function of on-line detection Download PDFInfo
- Publication number
- CN2248380Y CN2248380Y CN 95245511 CN95245511U CN2248380Y CN 2248380 Y CN2248380 Y CN 2248380Y CN 95245511 CN95245511 CN 95245511 CN 95245511 U CN95245511 U CN 95245511U CN 2248380 Y CN2248380 Y CN 2248380Y
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- CN
- China
- Prior art keywords
- current transformer
- box cap
- secondary coil
- standard capacitor
- line detection
- 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
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Abstract
The utility model relates to a current mutual inductor with the function of on-line detection for the purposes that a standard capacitor and a current mutual inductor are combined into a whole organically; the high-current detection is carried out for the equipment and the electric network of an electric power system; the on-line detection for isolation medium can be carried out; equipment and lines are protected for normal operation. The current mutual inductor with the function of on-line detection has the structure that a magnetic sleeve tube 8 and a supporting column 7 are arranged on a base 9; a porcelain box cap 1, primary coils L1, L2, and a secondary coil are arranged on the magnetic sleeve tube 8; a standard capacitor C< N >, an inner electrode 5 and an outer electrode 6 are arranged on the supporting column. The utility model has the advantages that materials of equipment are saved; the on-line detection of insulating medium can be carried out; the work efficiency is improved; the power utilization rate in unit area is large; various insulation failures can be eliminated.
Description
The utility model relates to and is used for ultra-high-tension power transmission line, power station, transformer station etc. big electric current is measured; fault to electric power system is protected; and in the electric power system when equipment carries out routine test on circuit and the power station; dielectric to each electric appliances carries out online detection, refers to have the current transformer of online measuring ability especially.
In background technology, in recent years, along with the develop rapidly of electric power system, power network is increasing, and it is important that safe operation of power system more seems.Aging for fear of the power network medium, avoid and reduce accidents such as power equipment blast and cause large-area power-cuts, the operation maintenance personnel will carry out routine test to all equipment that is moving every year, the general standard capacitor of selling on the market that adopts detects, its test period is all in half a year to one year, because this routine test is the power equipment that is moving in the power network to be pulled down the reasonable laboratory of the condition of being transported to carry out, so need cost great amount of manpower and material resources, cause large-area power failure, not only influence the power network safe operation, and still have the equipment component accident of blasting every now and then.
The purpose of this utility model is in order to overcome the weak point in the above-mentioned background technology; develop a kind of current transformer that has online measuring ability; adopt the standard capacitor summation current transformer organically to combine; big electric current to ultra-high-tension power transmission line, power station, transformer station etc. is measured; and the fault of electric power system protected; secondly when in electric power system, the equipment on circuit and the power station being carried out routine test, can carry out online detection to the dielectric of its each electric appliances.
Technical solution of the present utility model is as follows:
The current transformer that has online measuring ability, comprise: porcelain box cap 1 is assembled in magnetic insulating sleeve pipe 8 upper ends fixing on the base 9, supporting insulator 4 upper ends assembling Current Transformer Secondary coil 2 in porcelain box cap 1, current transformer primary conductive bar 3 two ends of passing through in this secondary coil 2 are assemblied on the porcelain box cap 1, in primary conductive bar 3, pass through lead L1L2 of current transformer, be characterized in, in shared magnetic insulating sleeve pipe 8, in the support pillar of fixing in the base 97, with cross-over block assembling standard capacitor C
NLow-field electrode 5 is fixed on the standard capacitor C of porcelain box cap at 1 end
N External electrode 6 connects lead L1 of current transformer.
Technical solution of the present utility model also comprises:
In magnetic insulating sleeve pipe 8, standard capacitor C
NHigh- low pressure electrode 6 and 5 between, and adopt the SF6 gas-insulated structure between the magnetosheath pipe 8 and in porcelain box cap 1, its internal inflation pressure is 2.5～5 atmospheric pressure.
In Current Transformer Secondary coil 2, secondary coil lead-out wire 1K1,1K2,2K1,2K2,3K1,3K2 are connected the secondary outlet box in the base 9 with 4K1,4K2 by porcelain box cap 1, support pillar 7.
Description of drawings of the present utility model is as follows:
Fig. 1 is the overall structure schematic diagram.
Fig. 2 is former technology SF6 gas insulated high voltage current transformer schematic diagram.
Fig. 3 is the SF6 gas insulated high voltage current transformer schematic diagram that has online measuring ability.
Above-mentioned number in the figure and symbol description are as follows:
The 1-porcelain box cap, 2-Current Transformer Secondary coil, 3-current transformer primary conductive bar, 4-supporting insulator, 5-standard capacitor C
NLow-field electrode, 6-standard capacitor C
NHigh-field electrode, 7-supports pillar, 8-magnetic catheter, 9-base, lead of L1L2-current transformer, 1K1,1K2,2K1,2K2,3K1,3K2 and 4K1,4K2-secondary coil exit, C
N-double shield standard capacitor.
Be that the utility model adjoint is described in further detail below: referring to Fig. 1, fixed insulation magnetosheath pipe 8 and support pillar 7 on the base 9 at magnetosheath pipe 8 upper ends assembling porcelain box cap 1, assemble standard capacitor C with cross-over block in the support pillar 7 in the magnetosheath pipe 8
NLow-field electrode 5, promptly interior electrode 5, standard capacitor C
NHigh-field electrode 6, promptly external electrode 6 upper ends are fixed on the outside, 1 end of porcelain box cap.In porcelain box cap 1, fixed current instrument transformer secondary coil 2 on the supporting insulator 4, current transformer primary conductive bar 3 by secondary coil 2 is assemblied on the porcelain box cap 1, and primary conductive bar 3 one end L1 are a lead of current transformer, and other end L2 also is a lead of current transformer.Its L1 end connects standard capacitor C
NExternal electrode 6.The lead-out wire of secondary coil 2 is connected on the secondary outlet box in the base 9 through porcelain box cap 1, magnetosheath pipe 8.In whole device, standard capacitor C
NBetween the high- low pressure electrode 6 and 5, and and magnetosheath pipe 8 between all be full of 2.5～5 atmospheric SF6 insulating gass, distance between its each is inversely proportional to its work field intensity, the height distance of magnetosheath pipe 8 is also influential to the work field intensity, in development series of products of the present utility model, make under its whole less size by optimal design, make its work field intensity drop to minimum.Referring to Fig. 2, this is a SF6 gas insulated high voltage current transformer schematic diagram in the former technology, and lead L1L2 of current transformer is by secondary coil, and the little electric current that the secondary coil mutual inductance is gone out can survey carries out current measurement.Referring to Fig. 3, this is circuit theory diagrams of the present utility model, standard capacitor C
NThe upper end, promptly the high voltage utmost point (or external electrode) 6 connects lead L1 end of current transformers, standard capacitor C
NThe lower end, promptly the low-voltage utmost point (or interior electrode) 5 inserts the earth in day-to-day operation, only when detecting, uses standard capacitor C
NMake standard relatively, the insulation property of the dielectric of other products are detected.Contrast Fig. 1; whole operation principle is like this: in use; lead L1 and L2 exit are serially connected on the system line; when system normally moves; secondary coil 1K1,1K2 in the current transformer; 2K1,2K2,3K1,3K2 and 4K1, the last mutual inductance of 4K2 produce the electric current that can be used for measuring or protecting usefulness, finish the measurement of a plurality of size of current and the function of transient state stable state protection coil.Has only when equipment such as the transformer in the electric power system, reactor, capacitor, switch are carried out its dielectric of online detection standard capacitor C
NDo not insert the earth, and connect detected material, finish online measuring ability by a cover electric bridge.
Technological merit of the present utility model and effect are as follows:
1, because on the basis of former SF6 gas-insulated transformer, organically with standard electric Container combination adopts same seal and same bed frame together, saves A large amount of material and expenses.
2, because the combination of two kinds of devices, thus original service behaviour not only had, As being used for a plurality of current measurements and relay protection, the protection of transient state stable state etc., and have The line measuring ability can be to reaching whole electric power on transformer station, power plant or the transmission line of electricity The dielectric of the equipment such as the transformer in the system, reactor, capacitor, switch carries out directly Connect measurement, do not need to the past like that, these equipment must be withdrawed from, tear open from circuit Unload, be transported to the laboratory and detect, thereby saved a large amount of human and material resources, wealth Power.
3, because the utility model can not have a power failure the checkout equipment system in detection Make power supply, direct-on-line detects on the road, so can shorten sense cycle, guarantees Safe operation of power system, the equipment that originally needed two weeks to have detected, existing needs one It even time half a day can be detected complete, have improved operating efficiency.
4, since can be online direct fast detecting, so annual detect several times more, just Can foreclose the various accidents of insulation hidden danger in time as early as possible, improve large tracts of land usefulness Electricity rate and Electrical Safety coefficient.
5, link to each other owing to standard capacitor summation current transformer high-field electrode, and Its low-pressure section is established one's own system and is independent of each other, so current transformer still can be just when detecting online Normal operation.
Claims (3)
1, the current transformer that has online measuring ability, comprise: base (9) is gone up fixing magnetic insulating sleeve pipe (8) upper end assembling porcelain box cap (1), supporting insulator (4) upper end assembling Current Transformer Secondary coil (2) in porcelain box cap (1), current transformer primary conductive bar (3) two ends of passing through in this secondary coil (2) are assemblied on the porcelain box cap (1), in primary conductive bar (3), pass through lead L1L2 of current transformer, it is characterized in that: in shared magnetic insulating sleeve pipe (8), in the support pillar of fixing in the base (9) (7), with cross-over block assembling standard capacitor C
NLow-field electrode (5) is fixed on the standard capacitor C of porcelain box cap (1) at the end
NExternal electrode (6) connects lead L1 of current transformer.
2, the current transformer that has online measuring ability according to claim 1 is characterized in that: in magnetic insulating sleeve pipe (8), and standard capacitor C
NHigh-low pressure electrode (6) and (5) between, and adopt the SF6 gas-insulated structure between the magnetosheath pipe (8) and in porcelain box cap (1), its internal inflation pressure is 2.5～5 atmospheric pressure.
3, the current transformer that has online measuring ability according to claim 1, it is characterized in that: in Current Transformer Secondary coil (2), secondary coil lead-out wire 1K1,1K2,2K1,2K2,3K1,3K2 are connected the secondary outlet box in the base (9) with 4K1,4K2 by porcelain box cap (1), support pillar (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95245511 CN2248380Y (en) | 1995-10-06 | 1995-10-06 | Current mutual inductor with function of on-line detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95245511 CN2248380Y (en) | 1995-10-06 | 1995-10-06 | Current mutual inductor with function of on-line detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2248380Y true CN2248380Y (en) | 1997-02-26 |
Family
ID=33885602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95245511 Expired - Fee Related CN2248380Y (en) | 1995-10-06 | 1995-10-06 | Current mutual inductor with function of on-line detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2248380Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100405070C (en) * | 2003-09-03 | 2008-07-23 | 溥杰盛私人有限公司 | Running and loading detection method for converter |
| CN103336261A (en) * | 2013-05-30 | 2013-10-02 | 中国电力科学研究院 | High-voltage live access apparatus for current transformer |
| CN104330761A (en) * | 2014-11-14 | 2015-02-04 | 国家电网公司 | Standard voltage ratio device for online error correction for voltage transformer and operation method |
-
1995
- 1995-10-06 CN CN 95245511 patent/CN2248380Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100405070C (en) * | 2003-09-03 | 2008-07-23 | 溥杰盛私人有限公司 | Running and loading detection method for converter |
| CN103336261A (en) * | 2013-05-30 | 2013-10-02 | 中国电力科学研究院 | High-voltage live access apparatus for current transformer |
| CN103336261B (en) * | 2013-05-30 | 2015-12-23 | 国家电网公司 | A kind of current transformer electrification in high voltage access device |
| CN104330761A (en) * | 2014-11-14 | 2015-02-04 | 国家电网公司 | Standard voltage ratio device for online error correction for voltage transformer and operation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |