CN204859052U - Female heat -extraction system of excitation sliding ring - Google Patents
Female heat -extraction system of excitation sliding ring Download PDFInfo
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- CN204859052U CN204859052U CN201520644564.9U CN201520644564U CN204859052U CN 204859052 U CN204859052 U CN 204859052U CN 201520644564 U CN201520644564 U CN 201520644564U CN 204859052 U CN204859052 U CN 204859052U
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Abstract
The utility model discloses a female heat -extraction system of excitation sliding ring, above -mentioned system include degaussing switch, generator, shunt and generating line, and this system still includes a trigeminy terminal, the generating line includes the generating line that comes from the power cabinet and the negative pole generating line of being qualified for the next round of competitions of degaussing switch, and wherein, the positive pole of the generating line that comes from the power cabinet is connected to the generator through the trigeminy terminal on, the generating line negative pole lug connection that comes from the power cabinet serves to de -excitation switch input, the negative pole generating line of de -excitation switched output end passes through trigeminy terminal and shunt connector to the generator. Utilize this system, through adjusting short connection the between each trigeminy terminal, can make that 300MW generator excited system can just go on, the negative pole exchanges, eliminated the wearing and tearing of two collecting electrodes on the produced sliding ring of cathode effect.
Description
Technical field
This method belongs to generator excited system field, particularly a kind of excitation slip ring busbar system.
Background technology
Power supply and the auxiliary device thereof of supply synchronous generator exciting electric current are referred to as excitation system, generator excited system is one of generator main equipment, its electric connecting mode as shown in Figure 1, and Generator Slip Ring frame and brush carrier, carbon brush are the important component parts of excitation system, its performance quality (especially in slip ring wearing and tearing) has material impact to the economy of power plant.
As exchanged slip ring positive-negative polarity not in time, will produce cathode effect, and cause slip ring the two poles of the earth to wear and tear imbalance, carbon brush abrasion seriously, collector ring heating even burns.This certainly will cause the waste on material, increases generator regular maintenance expense, the unit safety operation of serious threat simultaneously.Without the effective means of reality, this type of situation is solved to this each factory, just utilize (annual 1 light maintenance of generator maintenance cycle, 1 overhaul in 4 years), the slip ring in generator excited system and brush carrier are examined, tieed up, reduces excitation system slip ring as far as possible and occur wearing and tearing, fever phenomenon.
Current situation is domestic 300MW generating set, and excitation system, without the device of pole-adjustable, causes the non-adjustable pole of the positive and negative polarity of excitation slip ring busbar.
Though domestic many power plant have recognized the harm economically, on equipment that slip ring wearing and tearing bring; but because more than 300MW DCgenerator motor field electric current is larger; the current sharing deviation (deviation is crossed conference and caused generator protection action) simultaneously caused because positive and negative electrode busbar length is unbalanced in transformation process; the thermal stability that busbar tie point too much causes is difficult to containment; busbar connects and is the copper bar hard connecting mode problem such as cannot to transfer and cannot solves, and the positive and negative polarity of 300MW generating set is exchanged and only rests on theory stage.
Originally according to 300MW generator excitation system own characteristic, grade can only be installed at HS11B-4000/209 type or more than 4000 (electric current is at more than 4000A) double end plug-in strip, realize the positive and negative polarity of excitation and exchange.But more than HS11B-4000/209 type (containing 4000 types) double end plug-in strip produced after actual build too huge, weight about has 1000 kilograms, cannot install in demagnetization cabinet (100mm × 120mm × 230mm, wide × dark × high) at all.As increased cupboard separately, then because of design integral way change, excitation system design producer be unwilling to design it, and more than 4000A double end plug-in strip point, close disconnecting link time can operate with impersonal force.Therefore want that the double end plug-in strip utilizing switch producer to design almost can not realize to realize positive and negative electrode exchange.
Utility model content
The deficiency that the utility model exists for present technique, the utility model provides a kind of excitation slip ring busbar system, makes 300MW generator excited system carry out positive and negative electrode exchange, has eliminated the slip ring two collector electrode wearing and tearing that cathode effect produces.
The utility model is for solving the problems of the technologies described above by the following technical solutions:
A kind of excitation slip ring busbar system, comprise field suppression switch, generator, shunt and bus, this system also comprises one or three terminals, described bus comprises the outlet negative electrode bus of bus and the field suppression switch come from power cabinet, wherein, the positive pole of the bus from power cabinet is received generator by three connecting terminals, and the bus negative pole come from power cabinet is connected directly to field suppression switch input; The negative electrode bus of described field suppression switch output is connected on generator by three terminals and shunt.
Described three terminals are the copper bar contact adopting band polarity, specifically, described three terminals comprise three to the contact distributed side by side, and the negative pole of the positive pole of pair of contact and the two or three pair of contact is same row, and the positive pole of the negative pole of pair of contact and the two or three pair of contact is same row.
The positive pole of the bus from power cabinet has two branch roads, is connected respectively to the positive pole of pair of contact and the positive pole of the 3rd pair of contact, then is connected to generator from the positive pole extraction of second pair of contact; The negative electrode bus of field suppression switch output has two branch roads, is connected respectively to the negative pole of pair of contact and the negative pole of the 3rd pair of contact, then is connected to generator from the negative pole extraction of second pair of contact through shunt.
Short connected mode between the described three each contacts of terminal is:
The positive pole of pair of contact is connected with the negative pole of second pair of contact, and the negative pole of pair of contact is connected with the positive pole of second pair of contact.
Short connected mode between the described three each contacts of terminal is:
The negative pole of second pair of contact is connected with the negative pole of the 3rd pair of contact, and the positive pole of second pair of contact is connected with the positive pole of the 3rd pair of contact.
This system is arranged in field suppression switch cabinet, and in described field suppression switch cabinet, arrange an epoxy plate as base, be fixed on side by side on base copper bar contact, often pair of contact spacing is from equal.
A kind of excitation system slip ring polarity method of adjustment, the method provides one or three terminals, described three terminals comprise three to the contact distributed side by side, the negative pole of the positive pole of pair of contact and the two or three pair of contact is same row, and the positive pole of the negative pole of pair of contact and the two or three pair of contact is same row; Connected mode between the described three each contacts of terminal is:
Mode one, the positive pole of pair of contact is connected with the negative pole of second pair of contact, and the negative pole of pair of contact is connected with the positive pole of second pair of contact;
Mode two, the negative pole of second pair of contact is connected with the negative pole of the 3rd pair of contact, and the positive pole of second pair of contact is connected with the positive pole of the 3rd pair of contact;
This three connecting terminals being received in the excitation busbar of generator and go, by switching between the mode that is connected to of the three each contacts of terminal and mode two, changing excitation system slip ring polarity.
The utility model adopts above technical scheme compared with prior art, has following technique effect:
Now utilize the design principle of HS11B-4000/209 type, with reference to IEC62271-200-2003 " high voltage switchgear and control appliance ", IEC265 " isolating switch general provisions " and GBJ149-90 " construction of electric device installing engineering bus device and acceptance specification " standard, designed, designed goes out a kind of new connector-" three terminals ", for in excitation slip ring busbar system, regulate the polarity of excitation system slip ring.Its advantage is: volume is little, easy to operate, lightweight.
Global design theory removes some unnecessary parts, in the scope complied with the national standard requirements, reduces material weight, makes overall weight keep about about 250 jin, can effectively be arranged in demagnetization cabinet.And all designs, insulation standard, installation dimension are complied with the national standard requirements completely.
The excitation slip ring busbar system that the utility model provides, devise a kind of three novel terminals, apply it in generator excitation busbar, it adopts copper bar to form the contact system of band polarity, each contact be connected in power cabinet and generating set slip ring frame on, by changing the connected mode between each terminal, change the positive and negative electrode of Generator Slip Ring;
Excitation system eliminates cathode effect after carrying out positive and negative electrode exchange, and effectively keeps the balance of Generator Slip Ring two collector electrode wear extent, eliminates the loss of positive and negative electrode carbon brush abnormal;
This system configuration is simple, easy to operate, and volume is light and handy, adjusts without the need to the polarity by generator self, exchanges polarity chron at needs, only needs a check man that the short circuit copper bar on three terminals is changed the positive and negative electrode that can realize Generator Slip Ring by polarity and exchanges; Therefore during unit maintenance without the need to increasing workload separately, normal service work can be carried out.
And the confined space in this system Appropriate application excitation system demagnetization cabinet, not only meets GB, more embodies the lightweight trend of modern industry.
Accompanying drawing explanation
Fig. 1 is the principle schematic of excitation slip ring busbar system in this prior art;
Fig. 2 is the principle schematic of the utility model excitation slip ring busbar system;
Fig. 3 is the operation winding diagram of the utility model excitation slip ring busbar system;
Fig. 4 is the operation winding diagram of the utility model excitation slip ring busbar system;
Wherein, 1-field suppression switch, 2-generator, 3-shunt;
The negative pole of the positive pole of A-pair of contact, the negative pole of a-pair of contact, B-second pair of contact, the positive pole of b-second pair of contact, the negative pole of c1-the 3rd pair of contact, the positive pole of c2-the 3rd pair of contact.
Embodiment
The utility model provides a kind of excitation slip ring busbar system and excitation system slip ring polarity method of adjustment, and for making the purpose of this utility model, technical scheme and effect clearly, clearly, and further describe the utility model with reference to accompanying drawing examples.Should be appreciated that concrete enforcement described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Excitation slip ring busbar system as shown in Figure 2, comprise field suppression switch 1, generator 2, shunt 3 and bus, this system also comprises one or three terminals, described bus comprises the outlet negative electrode bus of bus and the field suppression switch 1 come from power cabinet, wherein, the positive pole of the bus from power cabinet is received generator 2 by three connecting terminals, and the bus negative pole come from power cabinet is connected directly to field suppression switch 1 input; The negative electrode bus of described field suppression switch 2 output is connected on generator by three terminals and shunt 3.
The structure of three terminals as shown in Figures 3 and 4, while meeting 300MW exciter current of generator, voltage needs, weight reduction as far as possible, can in switch cubicle normal mounting, the thick epoxy plate of special employing 35mm is base, 6 joint 400X120X20mm copper bars (length and width, thick), equidistantly through base plate, be screwed, and this design data meet national standard completely.
Design data: base plate is 500mm × 800mm × 35mm(length and width, thick) epoxy plate; It is wide, thick that terminal upper, middle and lower fixing point connection copper bar (containing short circuit short circuit copper bar) are of a size of 120mm × 20mm().Mode of operation: utilize 18 cun of artificial secured adjusted copper bars of bolt.
Specifically, three terminals comprise three to the contact A a distributed side by side, Bb, c1c2, and negative pole B, c1 of positive pole A and the two or the three pair contact of pair of contact are same row, and positive pole b, c1 of negative pole a and the two or the three pair contact of pair of contact are same row.In the present embodiment, the distribution of three terminal three pairs of contacts as shown in Figure 3, pair of contact positive pole A upper, negative pole a under, the two or three pair of contact is negative pole upper, positive pole under.
Then to be added in excitation system between field suppression switch 1 and slip ring on busbar tie point, the positive pole of the bus from power cabinet has two branch roads, be connected respectively to the positive pole c2 of positive pole A and the 3rd pair contact of pair of contact, then draw from the positive pole b of second pair of contact the slip ring frame being connected to generator; The negative electrode bus of field suppression switch 1 output has two branch roads, is connected respectively to the negative pole c1 of negative pole a and the 3rd pair contact of pair of contact, then draws from the negative pole B of second pair of contact the slip ring frame being connected to generator through shunt.Busbar can be blocked so no longer separately connect, to keep busbar integrality, reduce busbar and too much cause thermal stability to be deteriorated because of contact, and cause fault to occur.
There are two kinds of connection sides between the three each contacts of terminal, are specially:
Mode one, the positive pole A of pair of contact is connected with the negative pole B of second pair of contact, and the negative pole a of pair of contact is connected with the positive pole b of second pair of contact;
Mode two, the negative pole b of second pair of contact is connected with the negative pole c2 of the 3rd pair of contact, and the positive pole B of second pair of contact is connected with the positive pole c1 of the 3rd pair of contact.
This three connecting terminals being received in the excitation busbar of generator and go, by switching between the mode that is connected to of the three each contacts of terminal and mode two, changing excitation system slip ring polarity.The adjustment cycle of excitation slip ring polarity was as the criterion with an overhaul life, exchanged polarity chron at needs, only needed a check man that the short circuit copper bar on three terminals can be realized positive and negative electrode by polarity replacing and exchanged.
Be understandable that; for those of ordinary skills; can be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the utility model.
Claims (6)
1. an excitation slip ring busbar system, comprise field suppression switch, generator, shunt and bus, be characterised in that: this system also comprises one or three terminals, described bus comprises the outlet negative electrode bus of bus and the field suppression switch come from power cabinet, wherein, the positive pole of the bus from power cabinet is received generator by three connecting terminals, and the bus negative pole come from power cabinet is connected directly to field suppression switch input; The negative electrode bus of described field suppression switch output is connected on generator by three terminals and shunt.
2. a kind of excitation slip ring busbar system according to claim 1, be characterised in that: described three terminals are the copper bar contact adopting band polarity, specifically, described three terminals comprise three to the contact distributed side by side, the negative pole of the positive pole of pair of contact and the two or three pair of contact is same row, and the positive pole of the negative pole of pair of contact and the two or three pair of contact is same row.
3. a kind of excitation slip ring busbar system according to claim 2, be characterised in that: the positive pole of the bus from power cabinet has two branch roads, be connected respectively to the positive pole of pair of contact and the positive pole of the 3rd pair of contact, then be connected to generator from the positive pole extraction of second pair of contact; The negative electrode bus of field suppression switch output has two branch roads, is connected respectively to the negative pole of pair of contact and the negative pole of the 3rd pair of contact, then is connected to generator from the negative pole extraction of second pair of contact through shunt.
4. a kind of excitation slip ring busbar system according to Claims 2 or 3, is characterised in that: the short connected mode between the described three each contacts of terminal is:
The positive pole of pair of contact is connected with the negative pole of second pair of contact, and the negative pole of pair of contact is connected with the positive pole of second pair of contact.
5. a kind of excitation slip ring busbar system according to Claims 2 or 3, is characterised in that: the short connected mode between the described three each contacts of terminal is:
The negative pole of second pair of contact is connected with the negative pole of the 3rd pair of contact, and the positive pole of second pair of contact is connected with the positive pole of the 3rd pair of contact.
6. a kind of excitation slip ring busbar system according to Claims 2 or 3, be characterised in that: this system is arranged in field suppression switch cabinet, in described field suppression switch cabinet, arrange an epoxy plate as base, be fixed on side by side on base copper bar contact, often pair of contact spacing is from equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520644564.9U CN204859052U (en) | 2015-08-25 | 2015-08-25 | Female heat -extraction system of excitation sliding ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520644564.9U CN204859052U (en) | 2015-08-25 | 2015-08-25 | Female heat -extraction system of excitation sliding ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204859052U true CN204859052U (en) | 2015-12-09 |
Family
ID=54749563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520644564.9U Withdrawn - After Issue CN204859052U (en) | 2015-08-25 | 2015-08-25 | Female heat -extraction system of excitation sliding ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204859052U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099304A (en) * | 2015-08-25 | 2015-11-25 | 南京化学工业园热电有限公司 | Excitation slip ring bus-bar system and excitation system slip ring polarity adjusting method |
| CN109787430A (en) * | 2018-12-28 | 2019-05-21 | 四川省紫坪铺开发有限责任公司 | A kind of installation method of polarity reversal device case |
-
2015
- 2015-08-25 CN CN201520644564.9U patent/CN204859052U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099304A (en) * | 2015-08-25 | 2015-11-25 | 南京化学工业园热电有限公司 | Excitation slip ring bus-bar system and excitation system slip ring polarity adjusting method |
| CN105099304B (en) * | 2015-08-25 | 2017-11-10 | 南京化学工业园热电有限公司 | A kind of excitation slip ring busbar system and excitation system slip ring polarity method of adjustment |
| CN109787430A (en) * | 2018-12-28 | 2019-05-21 | 四川省紫坪铺开发有限责任公司 | A kind of installation method of polarity reversal device case |
| CN109787430B (en) * | 2018-12-28 | 2020-12-22 | 四川省紫坪铺开发有限责任公司 | Installation method of polarity reversing device box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151209 Effective date of abandoning: 20171110 |
|
| AV01 | Patent right actively abandoned |