CN203573832U - Thyristor on-load tap-changer telescoping contact assembly - Google Patents
Thyristor on-load tap-changer telescoping contact assembly Download PDFInfo
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- CN203573832U CN203573832U CN201320692666.9U CN201320692666U CN203573832U CN 203573832 U CN203573832 U CN 203573832U CN 201320692666 U CN201320692666 U CN 201320692666U CN 203573832 U CN203573832 U CN 203573832U
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- 238000004804 winding Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000010891 electric arc Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 238000012163 sequencing technique Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model provides a thyristor on-load tap-changer telescoping contact assembly including insulating bearers symmetrically fixed at the two ends of a touch rod via positioning pins, the insulating bearers are connected via a connecting member, telescoping contacts vertical to the connecting member are arranged on the insulating bearers, the two ends of an oriented guide plate are symmetrically provided with fixed contacts, the fixed contacts include fixed contact sheets which are respectively vertical to the upper and lower side surfaces of the oriented guide plate, the fixed contact sheets on one single side surface of the oriented guide plate are respectively in contact connection with the telescoping contacts and the touch rod, and the fixed contacts on the other single side surface of the oriented guide plate are connected with a transformer winding tap. Compared with the prior art, the thyristor on-load tap-changer telescoping contact assembly not only can meet the requirements of sequential control of a thyristor circuit, but also can increase the number of movable contacts and fixed contacts, thereby effectively reducing the recovery voltage in the fracture to meet the different demands of voltage regulating or capacitance adjusting of a transformer.
Description
Technical field
The utility model relates to a kind of flexible contact of on load tap changer, is specifically related to a kind of flexible contact for Thyristor On-load Tap Changer.
Background technology
On load tap changer is the significant components of electric power voltage regulating transformer and industrial voltage regulating transformer, and the adjustment that does not divide contact head interrupt load electric current in the situation that at transformer changes output voltage or the output capacity of transformer; Yet the electric arc that traditional on load tap changer and vacuum shunting switch produce when switching must bring the loss of energy and the pollution of transformer oil.Thyristor On-load Tap Changer can be avoided the generation of electric arc completely, and along with the development of electric power system, traditional on load tap changer will be replaced by this kind of novel shunting switch impacting without arc.In order to improve the fail safe of thyristor switch, often thyristor switch contact quantity is many, and fracture mode is complicated, and sequencing control requires high, manufactures and designs difficulty.For example existing KM type switch floral disc is every is 4 tracks mutually, four guide grooves distribute in the scope that is less than 120 degree, the switching sequence of controlling on load tap changer by the distribution of angle and the speed of central shaft running meets the requirement that tap converts, on the basis of original 4 guide grooves, increase guide groove, between guide groove, may occur mutually to interfere and make floral disc separated, and if reached by reducing angle and reducing guide groove width the requirement that increases guide groove, also can be unreasonable because of angular distribution, the reasons such as part strength and mechanism are too complicated cannot come into operation in practice.
Therefore, provide a kind of and can meet that contact quantity is many, fracture mode is complicated, sequencing control requires high Thyristor On-load Tap Changer to seem particularly important.
Summary of the invention
In order to meet the needs of prior art, the utility model provides a kind of Thyristor On-load Tap Changer contact assembly that stretches, and described flexible contact assembly comprises the insulated leg that is fixed on touch pole two ends by alignment pin symmetry; Described insulated leg is connected by connector; On described insulated leg, be provided with the flexible contact perpendicular to described connector; The two ends of directed guide plate are symmetrically arranged with determines contact; Describedly determine contact and comprise respectively the fixed touching plate perpendicular to described directed guide plate upper and lower side; The described fixed touching plate of a single side face of described directed guide plate is connected with described flexible contact, the contact of described movable feeler lever respectively; The described fixed touching plate of described directed another single side face of guide plate is connected with Transformer Winding tap.
Preferably, on the described flexible contact of described connector one end, be provided with the wire connector being connected with thyristor circuit, described wire connector is for accessing described thyristor circuit by described flexible contact and described conducting or the disconnection of determining contact; The other end of described connector is provided with described wire connector, and described wire connector is for accessing described thyristor circuit by described touch pole and described conducting or the disconnection of determining contact;
Preferably, described directed guide plate is placed in the diverter switch arc of described Thyristor On-load Tap Changer; Described flexible contact is arranged on described insulated leg by spacing pivot pin; Described flexible contact is connected with described connector by spring;
Preferably, described thyristor circuit comprises that two respectively by the thyristor of current-limiting resistance Opposite direction connection; Described wire connector on described flexible contact is connected with the output of described thyristor circuit; Described wire connector on described connector is connected with the tie point of described current-limiting resistance.
Compare with immediate prior art, excellent effect of the present utility model is:
1,, in technical solutions of the utility model, the thyristor continuous current in thyristor circuit is less than 12 milliseconds, and can not produce electric arc;
2, in technical solutions of the utility model, thyristor circuit is triggered by mechanical switch, does not need extra trigger control circuit; Thyristor rated capacity is low, and can not damage on load tap changer and transformer when thyristor is out of control;
3, the utility model provides passes through the flexible contact assembly of a kind of Thyristor On-load Tap Changer, can complete the conducting of two pairs of dynamic and static contacts or disconnect sequential action by enough guide grooves, effectively reduces guide groove quantity and does not reduce the quantity of dynamic and static contact; And the distribution that makes dynamic and static contact in a circumferential direction take angle minimum, thereby meet the design of multiple contact on load tap changer in circumference layout;
4, the utility model provides passes through the flexible contact assembly of a kind of Thyristor On-load Tap Changer, can effectively solve the defect that Thyristor On-load Tap Changer contact quantity is many, fracture is complicated, make contact fracture become three-dimensional and arrange, control sequential regulates by the height of coil tension spring;
5, the utility model provides passes through the flexible contact assembly of a kind of Thyristor On-load Tap Changer, can either meet the sequencing control requirement of thyristor circuit, also can increase number moving, that determine contact, thereby effectively reduce the different demands that recovery voltage between fracture meets transformer regulating or capacity transfer.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is: the flexible contact assembly structure chart of a kind of Thyristor On-load Tap Changer in the utility model embodiment;
Fig. 2 is: the flexible contact assembly profile of a kind of Thyristor On-load Tap Changer in the utility model embodiment;
Fig. 3 is: thyristor circuit figure in the utility model embodiment;
Fig. 4 is: the guide barrel construction figure of KM type on load tap changer in prior art;
Wherein, 1: wire connector; 2: insulated leg; 3: spring; 4: flexible contact; 5: spacing pivot pin; 6: determine contact; 7: directed guide plate; 8: alignment pin; 9: touch pole; 10: connector; 11: locating part; 12: wire connector.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described.
The utility model provides a kind of Thyristor On-load Tap Changer contact assembly that stretches, as Fig. 1 and 2 show respectively as described in structure chart and the profile of flexible contact assembly;
Flexible contact assembly comprises wire connector (1 and 12), insulated leg 2, spring 3, flexible contact 4, spacing pivot pin 5, determines contact 6, directed guide plate 7, alignment pin 8, touch pole 9, connector 10 and locating part 11; Insulated leg 2 is fixed on the two ends of touch pole 9 by alignment pin 8 symmetries; On insulated leg 2, be provided with the flexible contact 4 perpendicular to connector 10; Insulated leg 2 is connected by connector 10; Determine contact 6 and be symmetricly set on the two ends of directed guide plate 7; Determine contact and comprise respectively the fixed touching plate perpendicular to directed guide plate upper and lower side; The fixed touching plate of a single side face of directed guide plate is connected with flexible contact, movable feeler lever contact respectively; The fixed touching plate of directed another single side face of guide plate is connected with Transformer Winding tap;
Thyristor circuit comprises that two respectively by the thyristor 24 of current-limiting resistance r1, r2 Opposite direction connection as shown in Figure 3; Wire connector 12 on flexible contact is connected with the output of thyristor circuit; Wire connector 1 on connector 10 is connected with the tie point of current-limiting resistance;
The course of work of flexible contact assembly is:
When moving contact, touch pole need to be when determining contact conducting and be connected: connector 10 Compress Springs 3, flexible contact 4 with determine contact 6 and contact and be connected after, connector 10 continuation Compress Springs 3 are close to directed guide plate 7, until touch pole 9 with determine contact and be connected; When moving contact, touch pole need to be when determining contact and form fracture: the directed guide plate 7 of connector 10, touch pole 9 disconnects successively with the contact of determining contact and being connected with the reaction force of flexible contact 4 dependence springs 3, thereby forms double-fracture respectively;
Thyristor circuit is controlled sequential:
1.: moving contact, when touch pole disconnects with fixed contact respectively: the pushing mechanism of moving contact component by load tap changer approaches to be determined in contact process, because moving contact 4 and the distance of determining contact 6 are less than touch pole 9 and the distance of determining contact 6, moving contact 4 with determine contact 6 and first contact conducting, moving contact component continues close to determining contact by pushing mechanism, spring 3 range difference compressed and moving contact 4 and touch pole 9 starts to reduce, along with the minimizing of moving contact 4 with touch pole 9 distances, touch pole 9 contacts conducting with fixed contact 6, complete moving contact 4 and the first conducting of fixed contact 6, moving contact 9 and the time program process of determining contact 6 rear conductings, now, thyristor circuit is connected to the contact 21 and 22 in thyristor circuit by wire connector 1 by touch pole 9, and wire connector 12 is connected to the contact 23 in thyristor circuit by moving contact 4, after contact 23 is closed, contact 21,22 is closed again,
2.: moving contact, touch pole are during respectively with fixed contact conducting: when moving contact component moves in the other direction, touch pole 9 first disconnects with fixed contact 6, moving contact 4 by spring 3 still with determine contact 6 and contact, along with moving contact component with determine the increase of contact 6 distances, moving contact 4 disconnects with fixed contact 6, thereby realizes the first time program process of disconnected moving contact 4 rear disconnections of touch pole 9; After contact 21,22 first disconnects, contact 23 disconnects again;
3.: when A-B electric current flows through from contact 21-22 branch roads, in the time of need to disconnecting this switching branches: disconnect after 21-22 branch roads, voltage triggered on contact 21,22 thyristor 24, diode D2 provide gate current, diode D1 is used for preventing reverse swing door pole tension, and electric current flows through from 20-23 thyristor branch road immediately; During current over-zero, thyristor turn-offs, and its continuous current is less than 12 milliseconds and can not produce electric arc; While needing closed this switching branches, due to after 20-23 branch roads first close, thyristor 24 branch roads have been got one part of current, and the electric arc on 21-22 branch roads is limited.
Fig. 4 shows the guide barrel construction figure of KM type on load tap changer in prior art; If increase guide groove on the basis of original 4 guide grooves, between guide groove, may occur mutually to interfere and make floral disc separated; And if reached by reducing angle and reducing guide groove width the requirement that increases guide groove, also can be unreasonable because of angular distribution, part strength and mechanism is too complicated etc. that reason cannot come into operation in practice; In the present embodiment, directed guide plate 7 is placed in the diverter switch arc of Thyristor On-load Tap Changer, thereby make a guide groove complete the conducting of two pairs of dynamic and static contacts or disconnect sequential action, effectively reducing guide groove quantity and do not reduce the quantity of dynamic and static contact.
Finally should be noted that: described embodiment is only the application's part embodiment, rather than whole embodiment.Embodiment based in the application, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the application's protection.
Claims (4)
1. the flexible contact assembly of Thyristor On-load Tap Changer, is characterized in that, described flexible contact assembly comprises the insulated leg that is fixed on touch pole two ends by alignment pin symmetry; Described insulated leg is connected by connector; On described insulated leg, be provided with the flexible contact perpendicular to described connector; The two ends of directed guide plate are symmetrically arranged with determines contact; Describedly determine contact and comprise respectively the fixed touching plate perpendicular to described directed guide plate upper and lower side; The described fixed touching plate of a single side face of described directed guide plate is connected with described flexible contact, movable feeler lever contact respectively; The described fixed touching plate of described directed another single side face of guide plate is connected with Transformer Winding tap.
2. the flexible contact assembly of a kind of Thyristor On-load Tap Changer as claimed in claim 1, it is characterized in that, on the described flexible contact of described connector one end, be provided with the wire connector being connected with thyristor circuit, described wire connector is for accessing described thyristor circuit by described flexible contact and described conducting or the disconnection of determining contact; The other end of described connector is provided with described wire connector, and described wire connector is for accessing described thyristor circuit by described touch pole and described conducting or the disconnection of determining contact.
3. the flexible contact assembly of a kind of Thyristor On-load Tap Changer as claimed in claim 1, is characterized in that, described directed guide plate is placed in the diverter switch arc of described Thyristor On-load Tap Changer; Described flexible contact is arranged on described insulated leg by spacing pivot pin; Described flexible contact is connected with described connector by spring.
4. the flexible contact assembly of a kind of Thyristor On-load Tap Changer as claimed in claim 2, is characterized in that, described thyristor circuit comprises that two respectively by the thyristor of current-limiting resistance Opposite direction connection; Described wire connector on described flexible contact is connected with the output of described thyristor circuit; Described wire connector on described connector is connected with the tie point of described current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320692666.9U CN203573832U (en) | 2013-11-05 | 2013-11-05 | Thyristor on-load tap-changer telescoping contact assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320692666.9U CN203573832U (en) | 2013-11-05 | 2013-11-05 | Thyristor on-load tap-changer telescoping contact assembly |
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| Publication Number | Publication Date |
|---|---|
| CN203573832U true CN203573832U (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320692666.9U Expired - Lifetime CN203573832U (en) | 2013-11-05 | 2013-11-05 | Thyristor on-load tap-changer telescoping contact assembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107244A1 (en) * | 2015-12-21 | 2017-06-29 | 中国电力科学研究院 | Thyristor-assisted arc-extinguishing hybrid on-load tap switch |
| CN113066685A (en) * | 2021-02-08 | 2021-07-02 | 广东电网有限责任公司广州供电局 | Passive triggering contact device of power electronic tap switch |
-
2013
- 2013-11-05 CN CN201320692666.9U patent/CN203573832U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107244A1 (en) * | 2015-12-21 | 2017-06-29 | 中国电力科学研究院 | Thyristor-assisted arc-extinguishing hybrid on-load tap switch |
| CN113066685A (en) * | 2021-02-08 | 2021-07-02 | 广东电网有限责任公司广州供电局 | Passive triggering contact device of power electronic tap switch |
| CN113066685B (en) * | 2021-02-08 | 2022-05-20 | 广东电网有限责任公司广州供电局 | Passive triggering contact device of power electronic tap switch |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |
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| CX01 | Expiry of patent term |