CN201359913Y - On-load tap switch with phase-controlled permanent magnet mechanism - Google Patents
On-load tap switch with phase-controlled permanent magnet mechanism Download PDFInfo
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- CN201359913Y CN201359913Y CNU2009200683775U CN200920068377U CN201359913Y CN 201359913 Y CN201359913 Y CN 201359913Y CN U2009200683775 U CNU2009200683775 U CN U2009200683775U CN 200920068377 U CN200920068377 U CN 200920068377U CN 201359913 Y CN201359913 Y CN 201359913Y
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Abstract
The utility model discloses an on-load tap switch with a phase-controlled permanent magnet mechanism. The on-load tap switch consists of a diverter switch capable of being switched with current and a tap selector for pre-selecting tap positions without current, wherein the diverter switch includes a main contact section with long-term flow passage effect and a transition section with transition conduction effect; the transition section mainly includes a control device, a drive device and an execution unit; the execution unit includes a vacuum tube and a permanent magnet drive mechanism for driving the vacuum tube to act; and the permanent magnet drive mechanism is controlled by the drive device and controls the on and off of the vacuum tube when the current signal of a transformer crosses the zero point so as to achieve switch. The on-load tap switch can achieve arc-less transition switching when the current signal of the transformer crosses the zero point, thereby prolonging the service life of the transition switch element without contaminating the transformer oil in the oil chamber of the diverter switch.
Description
Technical field
The utility model relates to a kind of on load tap changer, particularly a kind of on load tap changer with phased permanent magnet mechanism.This on load tap changer with phased permanent magnet mechanism can be realized no arc switching by seeking AC wave shape zero point.
Background technology
Phase selection permanent-magnetic mechanism is set forth in the seventies in 20th century the earliest, and its technological core is exactly the initial phase angle of voltage or electric current during by the control switch divide-shut brake, to reduce and even to eliminate relevant electro-magnetic transient phenomenon.Along with the progress of modern electrical equipment manufacture level and microelectronics automatic control technology, this technology has been applied to many aspects of electrical power trans mission/distribution system.In " phased vacuum switch closes synchronously and closes capacitor group control strategy and realization thereof " literary composition of delivering as " Dalian University of Technology's journal " the 43rd the 4th phase of volume of publishing in July, 2003, disclose phase selection permanent-magnetic mechanism and drop into application on power system.Also have ABB AB in 1997 to release the vacuum circuit-breaker of joining permanent-magnet manipulating mechanism, also be a kind of example that phase selection permanent-magnetic mechanism uses, this vacuum circuit-breaker of joining permanent-magnet manipulating mechanism has that Machinery Ministry reduces, little, the electronics actuating of dispersiveness operate time is convenient to realize advantages such as various controls.
The applicant has invented a kind of vacuum bubbles group of replacing existing on load tap changer copper tungsten contact group, make the actual vacuum on-load operation switch that become of on load tap changer, when having solved main switching contact in the transition contact part and transition contact and having disconnected, produce electric arc, cause transition contact, main switching contact scaling loss, pollute the transformer wet goods technical problem in the diverter switch grease chamber simultaneously easily.But because vacuum bubbles is not to switch at voltage or current zero-crossing point, still exist electric arc, just electric arc is embedded in the vacuum bubbles.Because the generation of electric arc is arranged, make the vacuum bubbles lost of life.
The utility model content
Technical problem to be solved in the utility model provides a kind of on load tap changer with phased permanent magnet mechanism, to solve many weak points that existing on load tap changer exists.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
On load tap changer with phased permanent magnet mechanism, the tap selector that is carried out preselected tap position by the diverter switch of belt current conversion and one under belt current situation not combines, the diverter switch of described belt current conversion has comprised the main contact part of long-term through-flow effect and has played the transition portion of transition conducting effect, it is characterized in that described transition portion comprises:
One control device, this control device calculates the transformer current cycle signal zero-cross point in order to the switch-over control signal of accepting input and the current signal of gathering transformer, and output one postpones drive control signal;
One drive unit, this drive unit are accepted the delay drive control signal that control device is carried, and when the transformer current zero crossing, drive the performance element action;
One performance element, described performance element comprise a vacuum bubbles and promote the permanent mechanism driving mechanism of vacuum bubbles action that permanent mechanism driving mechanism is subjected to driving device controls and drives vacuum bubbles conducting and disconnection when the transformer current signal zero crossing, realizes switching.
Control device of the present utility model comprises signal gathering unit, processing unit and signal output unit, signal gathering unit is gathered the current signal of switch-over control signal and transformer, according to the transformer current signal input processing unit of switch-over control signal with collection; Processing unit is connected with signal gathering unit, and the current signal of receiving transformer is also handled, and detects the transformer current cycle signal zero-cross point; Signal output unit is connected with processing unit, and according to detected transformer current cycle signal zero-cross point, output one postpones drive control signal.
Drive unit of the present utility model comprises interconnective signal input processing unit and driver element, the signal input processing unit receives control unit and carries the delay drive control signal and the processing of coming, when the transformer current signal zero crossing, start the permanent mechanism driving mechanism action in the drive unit drives performance element.
Permanent mechanism driving mechanism of the present utility model is a bistable state permanent mechanism driving mechanism.
Owing to adopted technique scheme, the utility model really to realize on load tap changer when the transformer current signal zero crossing, realize no arc transition switching, make the transition switching device life-span prolong, can not pollute the transformer oil in the diverter switch grease chamber simultaneously.It is few to have mechanical part, has little, the electronic control of dispersiveness operate time and is convenient to advantages such as realization flexibly.
Description of drawings
Concrete characteristic of the present utility model is further described by following embodiment and accompanying drawing thereof, wherein:
Fig. 1 is the theory diagram that the utlity model has the on load tap changer transition portion of phased permanent magnet mechanism.
Fig. 2 is a control device theory diagram of the present utility model.
Fig. 3 is the theory diagram of the utility model driver element.
Fig. 4 is the structural representation of the utility model bistable permanent magnetic driving mechanism.
Fig. 5 is the annexation schematic diagram of the utility model bistable permanent magnetic driving mechanism and vacuum bubbles.
Fig. 6 is the electric principle schematic of diverter switch part that the utlity model has the on load tap changer of phased permanent magnet mechanism.
Fig. 7 is the on load tap changer transfer sequence figure that the utlity model has phased permanent magnet mechanism.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
On load tap changer with phased permanent magnet mechanism of the present utility model, the tap selector that is carried out preselected tap position by the diverter switch of belt current conversion and one under belt current situation not combines, and the diverter switch of described belt current conversion has comprised the main contact part and the transition portion that plays transition conducting effect of long-term through-flow effect.
Referring to Fig. 1, transition portion comprises a control device 100, one drive units 200, several performance elements 300 and several transition switching devices 400.Referring to Fig. 2, control device 100 comprises signal gathering unit 110, processing unit 120 and signal output unit 130 again, signal gathering unit 110 is gathered the current signal of switch-over control signal and transformer, after receiving a switching controls order, with the transformer current signal input processing unit of gathering 120, processing unit 120 is connected with signal gathering unit 110, begins to detect the transformer current cycle signal zero-cross point; After detecting first zero crossing, control voltage, ambient temperature, operation historical record according to performance element 300, the operate time of adaptive prediction execution unit, calculate the trigger delay time in real time, postpone drive control signal to drive unit 200 by the signal output unit output one that is attached thereto.
Referring to Fig. 3, drive unit 200 comprises interconnective signal input processing unit 210 and driver element 220 again, signal input processing unit 210 receives control unit and carries the delay drive control signal and the processing of coming, when the transformer current signal zero crossing, start driver element 220 and drive 300 actions of different performance elements.Driver element 220 has logic control and switching value I/O module, moves according to transfer sequence to drive different performance element 300.
Referring to Fig. 4, performance element 300 is a bistable state permanent mechanism driving mechanism, it comprises housing 310 and the switching winding 320, closing coil 330, permanent magnet 340 and the push rod 350 that are installed in the housing 310, push rod 350 is installed in the center of housing 310, stretch out at two ends, and wherein an end has the screw thread that is connected with transition switching device 400.Switching winding 320, closing coil 330, permanent magnet 340 are positioned at the periphery of push rod 350.When separating brake, switching winding 320 gets electric, after the magnetic force that switching winding 320 produces overcomes the magnetic force of permanent magnet 340 generations, promotes push rod 350 and moves upward, and carries out separating brake, behind the separating brake, and switching winding 320 outages, push rod 350 dependence permanent magnets 340 keep gate-dividing states.And when closing a floodgate, it is electric that closing coil 330 gets, after the magnetic force that closing coil 330 produces overcomes the magnetic force of permanent magnet 340 generations, promote push rod 350 and move downward, close a floodgate, behind the combined floodgate, closing coil 320 outages, push rod 350 rely on permanent magnet 340 to keep "on" position.
Referring to Fig. 5, the performance element 300 of 6 bistable permanent magnetic driving mechanism formation is installed on the disk 500, and the transition switching device 400 of 6 vacuum bubbles formation is installed on another piece disk 600, bottom among Fig. 5 can other parts combination of on load tap changer, forms the on load tap changer with phased permanent magnet mechanism of the present utility model.Every vacuum bubbles 600 is connected with push rod in the bistable permanent magnetic driving mechanism by connecting rod 700.When the bistable permanent magnetic driving mechanism carries out the divide-shut brake action, drive vacuum bubbles by connecting rod 700 and carry out the divide-shut brake action synchronously.
Referring to Fig. 6 and Fig. 7, a phase diverter switch of on-load tap changers of transformers is by main current-carrying switch S 1, S2,3 vacuum bubbles V1, V2, V3, and a transition resistance R, circuit connect substantially the same with the circuit connection of existing on load tap changer.
Its changeover program is: when reset condition, main current-carrying switch S 1 and vacuum bubbles V1 are in closing position, and main current-carrying switch S 2 and vacuum bubbles V2, V3 are in the separating brake position and (see among Fig. 7 that a), electric current flows through through main current-carrying switch S 1.Behind inputting switching command, control device detects the transformer current cycle signal zero-cross point, behind the about 20ms of drive unit, makes main current-carrying switch S 1 separating brake (seeing b among Fig. 7), makes vacuum bubbles V3 combined floodgate (seeing c among Fig. 7) by the bistable permanent magnetic driving mechanism simultaneously.After the affirmation, when first zero crossing of transformer current signal, make vacuum bubbles V1 separating brake (seeing d among Fig. 7) by the bistable permanent magnetic driving mechanism, electric current flows through through vacuum bubbles V3 and transition resistance R.After the affirmation, by the bistable permanent magnetic driving mechanism vacuum bubbles V2 is closed a floodgate (seeing e among Fig. 7), electric current flows through through vacuum bubbles V3 and transition resistance R and vacuum bubbles V2, forms the loop; Then when second zero crossing of transformer current signal, make vacuum bubbles V3 separating brake (seeing f among Fig. 7) by the bistable permanent magnetic driving mechanism, after the affirmation, main current-carrying switch S 2 is closed a floodgate and is entered new stable state.Under new stable state: main current-carrying switch S 2 and vacuum bubbles V2 are in closing position, and main current-carrying switch S 1 and vacuum bubbles V1, V2 are in separating brake position (seeing g among Fig. 7).Whole switching time about 20ms.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. the on load tap changer that has phased permanent magnet mechanism, the tap selector that is carried out preselected tap position by the diverter switch of belt current conversion and one under belt current situation not combines, the diverter switch of described belt current conversion has comprised the main contact part of long-term through-flow effect and has played the transition portion of transition conducting effect, it is characterized in that described transition portion comprises:
One control device, this control device calculates the transformer current cycle signal zero-cross point in order to the switch-over control signal of accepting input and the current signal of gathering transformer, and output one postpones drive control signal;
One drive unit, this drive unit are accepted the delay drive control signal that control device is carried, and when the transformer current zero crossing, drive the performance element action;
One performance element, described performance element comprise a vacuum bubbles and promote the permanent mechanism driving mechanism of vacuum bubbles action that permanent mechanism driving mechanism is subjected to driving device controls and drives vacuum bubbles conducting and disconnection when the transformer current signal zero crossing, realizes switching.
2. the on load tap changer with phased permanent magnet mechanism as claimed in claim 1, it is characterized in that, described control device comprises signal gathering unit, processing unit and signal output unit, signal gathering unit is gathered the current signal of switch-over control signal and transformer, according to the current signal input processing unit of switch-over control signal with the transformer of collection; Processing unit is connected with signal gathering unit, and the current signal of receiving transformer is also handled, and detects the transformer current cycle signal zero-cross point; Signal output unit is connected with processing unit, and according to detected transformer current cycle signal zero-cross point, output one postpones drive control signal.
3. the on load tap changer with phased permanent magnet mechanism as claimed in claim 1, it is characterized in that, described drive unit comprises interconnective signal input processing unit and driver element, the signal input processing unit receives control unit and carries the delay drive control signal and the processing of coming, when the transformer current signal zero crossing, start the permanent mechanism driving mechanism action in the drive unit drives performance element.
4. the on load tap changer with phased permanent magnet mechanism as claimed in claim 1 is characterized in that, described permanent mechanism driving mechanism is a bistable state permanent mechanism driving mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200683775U CN201359913Y (en) | 2009-03-04 | 2009-03-04 | On-load tap switch with phase-controlled permanent magnet mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200683775U CN201359913Y (en) | 2009-03-04 | 2009-03-04 | On-load tap switch with phase-controlled permanent magnet mechanism |
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| Publication Number | Publication Date |
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| CN201359913Y true CN201359913Y (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2009200683775U Expired - Fee Related CN201359913Y (en) | 2009-03-04 | 2009-03-04 | On-load tap switch with phase-controlled permanent magnet mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102043908A (en) * | 2010-12-29 | 2011-05-04 | 哈尔滨电机厂有限责任公司 | Method for determining gasified cavitation bubble inception of runner blades of model water turbine by utilizing computer |
| WO2016106917A1 (en) * | 2014-12-29 | 2016-07-07 | 刁俊起 | Permanent magnet drive on-load tap-changing switch |
| CN112670067A (en) * | 2020-11-18 | 2021-04-16 | 中国电力科学研究院有限公司 | Symmetrical vacuum bubble load balancing transition circuit device and control method |
-
2009
- 2009-03-04 CN CNU2009200683775U patent/CN201359913Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102043908A (en) * | 2010-12-29 | 2011-05-04 | 哈尔滨电机厂有限责任公司 | Method for determining gasified cavitation bubble inception of runner blades of model water turbine by utilizing computer |
| WO2016106917A1 (en) * | 2014-12-29 | 2016-07-07 | 刁俊起 | Permanent magnet drive on-load tap-changing switch |
| US10249451B2 (en) | 2014-12-29 | 2019-04-02 | Junqi DIAO | Permanent magnet drive on-load tap-changing switch |
| CN112670067A (en) * | 2020-11-18 | 2021-04-16 | 中国电力科学研究院有限公司 | Symmetrical vacuum bubble load balancing transition circuit device and control method |
| CN112670067B (en) * | 2020-11-18 | 2022-07-01 | 中国电力科学研究院有限公司 | Symmetrical vacuum bubble load balancing transition circuit device and control method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091209 Termination date: 20130304 |