CN105321744A - On-load capacity-regulating switch for transformer - Google Patents
On-load capacity-regulating switch for transformer Download PDFInfo
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- CN105321744A CN105321744A CN201510705887.9A CN201510705887A CN105321744A CN 105321744 A CN105321744 A CN 105321744A CN 201510705887 A CN201510705887 A CN 201510705887A CN 105321744 A CN105321744 A CN 105321744A
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- 239000012212 insulator Substances 0.000 claims description 4
- 230000003140 astrocytic effect Effects 0.000 claims description 3
- 239000003636 conditioned culture medium Substances 0.000 claims description 3
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0027—Operating mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0038—Tap change devices making use of vacuum switches
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention discloses an on-load capacity-regulating switch for a transformer. The on-load capacity-regulating switch comprises a high-voltage coil switching system, a low-voltage coil switching system, at least one permanent magnet mechanism and a transmission mechanism matched with the permanent magnet mechanism; the high-voltage coil switching system comprises at least three vacuum arc extinguish chambers; the low-voltage coil switching system comprises at least four vacuum arc extinguish chambers; the permanent magnet mechanism reciprocally drives each vacuum arc extinguish chamber to perform switch-off and switch-on actions through the transmission mechanism to further switch the coils of the transformer to realize the purpose of regulating the capacity of the transformer. Through the structural scheme that the high-voltage coil switching system and low-voltage coil switching system formed by the vacuum arc extinguish chambers are driven by the permanent magnet mechanism, the problem in arc extinguish in the high voltage side and the lower voltage side is solved; and the on-load capacity-regulating switch is simple in structure, high in reliability, short in action completion time, long in service life and maintenance-free in lifelong time.
Description
Technical field
The invention belongs to power industry technical field of transformer equipment, particularly relate to a kind of loaded capacity-regulated switch on transformer.
Background technology
Loaded capacity-regulated transformer is a kind of transformer with size two kinds of rated capacities.According to payload, utilizing the connected mode of special capacitance switch switching transformer winding when not cutting off the electricity supply, then realizing the switching of transformer between two kinds of different capabilities.The acquisition pattern of the large low capacity of capacitance-adjustable transformer mainly contains two kinds: one is that high-pressure side is changed by D/Y, and low-pressure side is realized by the serioparallel exchange of coil; Another kind is that high-pressure side and low-pressure side are all realized by the serioparallel exchange of coil.
There is following problem in the capacitance switch of prior art: the high pressure of capacitance switch and low-voltage contact adopt grease chamber's structure altogether.In capacity transfer transfer process, high-voltage contact and low-voltage contact all produce electric arc, and this causes contact impaired, and electrical endurance only has 3 to 5 ten thousand times.Within 20 years, calculate by transformer life, every day can only switch 4 to 6 times, can not meet actual demand; Electric arc makes oil very easily deterioration occur, and often runs 2000 times (about years) and will to have a power failure maintenances of changing oil, and this causes capacitance-adjustable transformer popularization to be subject to very large resistance.
The capacitance switch of prior art uses motor to rotate to spring energy agency energy storage, and the mode that then dead point discharges suddenly excessively drives high-voltage contact and low-voltage contact to switch.This driving mechanism structure is complicated, and part is many, and failure rate is high, and reliability is low.Can only anti-factory keep in repair after capacitance switch is bad; The switching time long (about 35ms) of this driving mechanism, the duration of the switching overvoltage of generation and the duration of voltage waveform distortion are also correspondingly long.
The capacitance switch of prior art is of limited application.The current capacity of its low-voltage contact limits the lifting of capacity, and capacitance switch can supporting transformer heap(ed) capacity be 630kVA.Can only be applied on oil-filled transformer.
For solving the problem, Chinese patent CN102254713 discloses a kind of loaded capacity-regulated switch of single hop mouth, it comprises main contact line and transition contact line, described transition contact line there is transition resistance and connect with the second vacuum interrupter, described main contact line has two, article one, be the corner connection main contact line with the first vacuum interrupter, article one, be connect main contact line with the star of the 3rd vacuum interrupter, the disconnection of all vacuum interrupters and closed be rotated by driven by motor cam to realize;
Although this capacitance switch solves the problem of the reliable breath arc of high-pressure side contact in the handoff procedure of star angle, its low-pressure side also can produce arcing in serioparallel exchange process, and user still needs make regular check on and change transformer oil; Drive unit remains and uses motor spring energy agency, and part is many, complex structure, and failure rate is high, safeguards also difficulty.
Summary of the invention
For the problems referred to above, the invention provides that a kind of reliability is high, structure is simple, the life-span is long, the loaded capacity-regulated switch of non-maintaining, applied range.
To achieve these goals, the present invention is by the following technical solutions: the loaded capacity-regulated switch of a kind of transformer, comprise high-tension coil switched system, low-voltage coil switched system, at least a set of permanent magnet mechanism and the transmission mechanism matched with this permanent magnet mechanism, described high-tension coil switched system comprises at least three vacuum interrupters, described low-voltage coil switched system comprises at least four vacuum interrupters, described permanent magnet mechanism back and forth drives described each vacuum interrupter to carry out separating brake and feed motion by described transmission mechanism, and then the coil of switching transformer reaches the object regulating transformer capacity.The present invention's permanent magnet mechanism, as driving mechanism, replaces the motor spring energy agency that prior art uses, and structure is simple, and reliability is high, switches rapidly (within 20ms); With vacuum interrupter composition high-tension coil switched system and low-voltage coil switched system, efficiently solve the arc extinguishing problem of high-pressure side and low-pressure side, the capacitance switch eliminating prior art often runs that will having a power failure for 2000 times changes oil carries out the inconvenience safeguarded, achieve in the lifetime of transformer non-maintaining, and the capacitance switch life-span long (electrical endurance 100,000 times), extensively (transformer capacity can arrive 2500kVA to answer scope in fact, dry type and oil-filled transformer all can be applied), entirety is more safe and reliable.
Preferably, multiple connectors that described transmission mechanism comprises actuator and is flexibly connected with this actuator, described multiple connector other end is connected with corresponding vacuum interrupter respectively.As improvement, described actuator can directly be connected with described permanent magnet mechanism, permanent magnet mechanism drives the action of each connector by actuator, and each connector is connected with corresponding vacuum interrupter respectively, then each vacuum interrupter is made to realize self contained function, once, each vacuum interrupter carries out corresponding separating brake or feed motion to the every action of permanent magnet mechanism respectively, carries out capacity transfer when achieving not power-off.
Further, described multiple connector is connected with corresponding vacuum interrupter by an insulator 38 respectively.Utilize insulator as the insulating part between vacuum interrupter and transmission mechanism, install convenient, safe and reliable.
As preferably, described vacuum interrupter is the vacuum tube with dynamic and static contact, and reliability is high, ensures effectively to carry out arc extinguishing.
Further, described low-voltage coil switched system comprises low pressure first parallel connection vacuum arc extinguishing chamber, low pressure second parallel connection vacuum arc extinguishing chamber, low voltage series vacuum interrupter and is in series with the low pressure transition vacuum interrupter of transition resistance; When low pressure first parallel connection vacuum arc extinguishing chamber, low pressure second parallel connection vacuum arc extinguishing chamber are when closing a floodgate, making low-voltage coil present parallel-connection structure, when low voltage series vacuum interrupter is when closing a floodgate, making low-voltage coil present cascaded structure; By arranging four vacuum interrupters, carry out serioparallel exchange to reach the object of switching capacity to the coil of low pressure winding, effectively ensure that the not power-off when connection in series-parallel is changed of low pressure winding, the transition resistance of series connection plays the effect of limiting coil circulation.
Further, when described low-voltage coil is in parallel-connection structure, driving mechanism drives low pressure first parallel connection vacuum arc extinguishing chamber, low pressure second parallel connection vacuum arc extinguishing chamber to close a floodgate by transmission mechanism, drives low voltage series vacuum interrupter and low pressure transition vacuum interrupter separating brake; Described low-voltage coil is converted in the process of cascaded structure by parallel-connection structure, the action of permanent magnet mechanism drive transmission device, and transmission mechanism ensures that each vacuum interrupter is by following sequential action:
Low pressure transition vacuum interrupter is first connected;
Low pressure first parallel connection vacuum arc extinguishing chamber, low pressure second parallel connection vacuum arc extinguishing chamber separating brake;
Low voltage series vacuum interrupter closes a floodgate;
Low pressure transition vacuum extinction separating brake, completes conversion; Otherwise when needs low-voltage coil is converted to parallel-connection structure by cascaded structure, step is contrary.
Time normal, low pressure transition vacuum interrupter is separating brake, on the contrary only low-voltage coil to be converted to by cascaded structure parallel-connection structure or process in, this low pressure transition vacuum interrupter is all first connected, not power-off during guarantee serioparallel exchange, after converting, this low pressure transition vacuum interrupter disconnects again.
Further, described high-tension coil switched system comprises corner connection vacuum interrupter, star connects vacuum interrupter and be in series with the high pressure transition vacuum interrupter of transition resistance; Described corner connection vacuum interrupter makes high-tension coil present triangle connection when closing a floodgate, star connects vacuum interrupter makes high-tension coil present Astrocytic conditioned medium when closing a floodgate.The setting of three vacuum interrupters, ensures that high pressure winding can effective arc extinguishing when carrying out the conversion of star angle, and achieves transfer process not power-off; The high pressure transition resistance of series connection plays the effect of limiting coil circulation.
Further, when described high-tension coil is in angle connecting structure, driving mechanism drives described corner connection vacuum interrupter to close a floodgate by transmission mechanism, drives star to connect vacuum interrupter and high pressure transition vacuum interrupter separating brake; Described high-tension coil is converted in the process that star connects by corner connection, the action of permanent magnet mechanism drive transmission device, and transmission mechanism ensures that each vacuum interrupter is by following sequential action:
High pressure transition vacuum interrupter is first connected;
Corner connection vacuum interrupter separating brake;
Star connects vacuum interrupter and closes a floodgate;
High pressure transition vacuum extinction separating brake, completes conversion; Otherwise, when needs high-tension coil by star switch through be changed to corner connection time, step is contrary.
Time normal, described high pressure transition vacuum interrupter is separating brake, on the contrary only high-tension coil to be switched through by star be changed to corner connection or process in, this high pressure transition vacuum interrupter is all first connected, not power-off when ensureing that star angle is changed, after converting, this high pressure transition vacuum interrupter disconnects again.
Or further, described high-tension coil switched system comprises high pressure first parallel connection vacuum arc extinguishing chamber, high pressure second parallel connection vacuum arc extinguishing chamber, high-pressure series vacuum interrupter and is in series with the high pressure transition vacuum interrupter of transition resistance; Described high pressure first parallel connection vacuum arc extinguishing chamber, high pressure second parallel connection vacuum arc extinguishing chamber are when closing a floodgate, and described high-tension coil presents parallel-connection structure, and described high-pressure series vacuum interrupter is when closing a floodgate, and described high-tension coil presents cascaded structure; Time normal, high pressure transition vacuum interrupter is all separating brake, otherwise only high-tension coil to be converted to by cascaded structure parallel-connection structure or process in, this vacuum interrupter is all first connected, not power-off during guarantee serioparallel exchange, after converting, this vacuum interrupter disconnects again, and high pressure transition resistance plays the effect of limiting coil circulation.High pressure winding side is also with the mode switching capacity of coil connection in series-parallel conversion, match with the connection in series-parallel conversion capacity of low pressure winding side, the arbitrary proportion of variable compression ratio between 0.1 ~ 0.9 of capacitance-adjustable transformer can be realized, make capacitance-adjustable transformer be applicable to the situation of various peak valley load more flexibly, more multiple-energy-source can be saved.
Further, when described high-tension coil is in parallel-connection structure, driving mechanism drives high pressure first parallel connection vacuum arc extinguishing chamber, high pressure second parallel connection vacuum arc extinguishing chamber to close a floodgate by transmission mechanism, drives high-pressure series vacuum interrupter and high pressure transition vacuum interrupter separating brake; When high-tension coil is converted in the process of cascaded structure by parallel-connection structure, the action of permanent magnet mechanism drive transmission device, and transmission mechanism ensures that each vacuum interrupter is by following sequential action:
High pressure transition vacuum interrupter is first connected;
High pressure first parallel connection vacuum arc extinguishing chamber, high pressure second parallel connection vacuum arc extinguishing chamber separating brake;
High-pressure series vacuum interrupter closes a floodgate;
High pressure transition vacuum extinction separating brake, completes conversion, is now cascaded structure; Otherwise when needs high-tension coil is converted to parallel-connection structure by cascaded structure, step is contrary.
Further, the acquisition of the large low capacity of capacitance-adjustable transformer, no matter be that the serioparallel exchange adopting coil D/Y conversion in high-pressure side to add low-voltage side coil realizes, or adopt high-pressure side and low-pressure side all to be realized by the serioparallel exchange of coil, the corresponding conversion action that described high-tension coil switched system and low-voltage coil switched system carry out is the same period, and asynchrony is less than 0.2ms.
In sum, the invention has the beneficial effects as follows: with vacuum interrupter composition high-tension coil switched system and low-voltage coil switched system, efficiently solve the arc extinguishing problem of high-pressure side and low-pressure side, non-maintaining, the life-span is long; With permanent magnet mechanism as driving mechanism, structure is simple, and reliability is high, and switching action completes rapidly, is also correspondingly shortened by the duration of switching overvoltage and the duration of voltage waveform distortion switching generation.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the present invention's low-pressure side winding when transformer Large Copacity.
Fig. 2 is the circuit diagram of the present invention's low-pressure side winding when transformer low capacity.
Fig. 3 is low-side arrangement schematic diagram of the present invention.
Fig. 4 is high-pressure side of the present invention structural representation.
Fig. 5 is that high-tension coil of the present invention adopts the conversion of star angle, and transformer is by the course of work of each vacuum interrupter in Large Copacity to low capacity handoff procedure.
Fig. 6 is the circuit diagram of the present invention's high-pressure side winding when transformer Large Copacity.
Fig. 7 is the circuit diagram of the present invention's high-pressure side winding when transformer low capacity.
Fig. 8 is that high-tension coil of the present invention adopts serioparallel exchange, and transformer is by the course of work of each vacuum interrupter in Large Copacity to low capacity handoff procedure.
Wherein, K represents vacuum interrupter, symbol "
day" represent that vacuum interrupter is in "on" position, symbol "
order" represent that vacuum interrupter is in gate-dividing state; R represents transition resistance; T represents the time.
Embodiment
In order to make those skilled in the art person better understand the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention.
The loaded capacity-regulated switch of a kind of transformer, the transmission mechanism comprising high-tension coil switched system, low-voltage coil switched system, permanent magnet mechanism 1 and match with this permanent magnet mechanism.Concrete, for one, the high-tension coil switched system of every phase comprises three vacuum interrupters, the low-voltage coil switched system of every phase comprises four vacuum interrupters, described vacuum interrupter is the vacuum tube with dynamic and static contact, and its reliability is high, can ensure effectively to carry out arc extinguishing; Described permanent magnet mechanism drives described each vacuum interrupter to carry out separating brake and combined floodgate by described transmission mechanism, and then the connection of switching coil.
First, low-voltage coil switched system is described, for one, the low-voltage coil switched system of every phase comprises four vacuum interrupters, as shown in Figure 3, described four vacuum interrupters be low pressure first parallel connection vacuum arc extinguishing chamber 52, low pressure second parallel connection vacuum arc extinguishing chamber 53, low voltage series vacuum interrupter 51 and be in series with the low pressure transition vacuum interrupter 54 of transition resistance; When low pressure first parallel connection vacuum arc extinguishing chamber, low pressure second parallel connection vacuum arc extinguishing chamber are when closing a floodgate, making low-voltage coil present parallel-connection structure, when low voltage series vacuum interrupter is when closing a floodgate, making low-voltage coil present cascaded structure.By arranging four vacuum interrupters, effectively ensure that the effective arc extinguishing of low pressure winding when connection in series-parallel is changed;
When described low-voltage coil is in parallel-connection structure, driving mechanism drives low pressure first parallel connection vacuum arc extinguishing chamber, low pressure second parallel connection vacuum arc extinguishing chamber to close a floodgate by transmission mechanism, drives low voltage series vacuum interrupter and low pressure transition vacuum interrupter separating brake; Described low-voltage coil is converted in the process of cascaded structure by parallel-connection structure, the action of permanent magnet mechanism drive transmission device, and transmission mechanism ensures that each vacuum interrupter is by following sequential action:
Low pressure transition vacuum interrupter is first connected;
Low pressure first parallel connection vacuum arc extinguishing chamber, low pressure second parallel connection vacuum arc extinguishing chamber separating brake;
Low voltage series vacuum interrupter closes a floodgate;
Low pressure transition vacuum extinction separating brake, completes conversion.
Concrete, as shown in Figure 1, 2, Fig. 1 is that (K5, K6's coils from parallel connection of coils structure close a floodgate; K7, K8 separating brake), namely transformer is in Large Copacity state; Fig. 2 is that (K8's coils connected in series structure closes a floodgate; K5, K6, K7 separating brake), namely transformer is in low capacity state; Wherein K5, K6 are low pressure parallel connection vacuum arc extinguishing chamber, and K8 is low voltage series vacuum interrupter, and K7 is low pressure transition vacuum interrupter, is in series with transition resistance R.At coil by parallel connection in cascaded structure transfer process, permanent magnet mechanism drive transmission device, and the special construction of transmission mechanism ensures the action in the following order of each vacuum interrupter:
K7 combined floodgate → K5, K6 separating brake → K8 combined floodgate → K7 separating brake, completes conversion, is now coils connected in series structure; Otherwise when needs low-voltage coil is converted to parallel-connection structure by cascaded structure, step is contrary.
As shown in Figure 4,5, for adopting the high-tension coil switched system of star angle conversion; For three-phase, the high-tension coil switched system of every phase comprises three vacuum interrupters, is specially corner connection vacuum interrupter 61, star connects vacuum interrupter 63 and is in series with the high pressure transition vacuum interrupter 64 of transition resistance; Described corner connection vacuum interrupter makes high-tension coil present triangle connection when closing a floodgate, star connects vacuum interrupter makes high-tension coil present Astrocytic conditioned medium when closing a floodgate.
When described high-tension coil is in angle connecting structure, driving mechanism drives described corner connection vacuum interrupter to close a floodgate by transmission mechanism, drives star to connect vacuum interrupter and high pressure transition vacuum interrupter separating brake; Described high-tension coil is converted in the process that star connects by corner connection, the action of permanent magnet mechanism drive transmission device, and transmission mechanism ensures that each vacuum interrupter is by following sequential action:
High pressure transition vacuum interrupter is first connected;
Corner connection vacuum interrupter separating brake;
Star connects vacuum interrupter and closes a floodgate;
High pressure transition vacuum extinction separating brake, completes conversion.
Concrete, as illustrated in figs. 5-7, Fig. 6 is that (K4's angle connecting structure schematic diagram closes a floodgate; K1, K3 separating brake), namely transformer is in Large Copacity state; Fig. 7 is that star connects structural representation (K1 combined floodgate; K3, K4 separating brake), namely transformer is in low capacity state; Wherein K1 is that star connects vacuum interrupter, and K4 is corner connection vacuum interrupter, and K3 is high pressure transition vacuum interrupter, is in series with transition resistance R.Connect in transfer process by corner connection to star at high-tension coil, permanent magnet mechanism drive transmission device, and the special construction of transmission mechanism ensures the action in the following order of each vacuum interrupter:
K3 combined floodgate → K4 separating brake → K1 combined floodgate → K3 separating brake, completes conversion, now for star connects.Otherwise, when needs high-tension coil by star switch through be changed to corner connection time, step is contrary.
Obviously, in other are implemented, high pressure winding also can adopt serioparallel exchange to realize the switching of large low capacity, now, its serioparallel exchange structure is the same with low-voltage coil switched system, described high-tension coil switched system comprises four vacuum interrupters, and only four vacuum interrupters are high pressure.As shown in Figure 8, concrete connected mode and course of action reference strings the low-pressure side winding of transformational structure, repeat no more the course of work of each vacuum interrupter herein.
Further, multiple connectors that described transmission mechanism comprises actuator and is flexibly connected with this actuator, described multiple connector other end is connected with corresponding vacuum interrupter respectively.Concrete, in the present embodiment, described actuator is two bodies of rod, and a body of rod 31 is positioned at low-voltage coil switched system side, and another root body of rod 32 is positioned at high-pressure system side, and permanent magnet mechanism drives two bodies of rod to be synchronized with the movement by linkage 33; Obviously, in other embodiments, described permanent magnet mechanism can directly be connected with two bodies of rod; Each connector is connected with corresponding vacuum interrupter respectively, then makes each vacuum interrupter realize self contained function, and once, each vacuum interrupter carries out corresponding separating brake and feed motion to the every action of permanent magnet mechanism respectively, carries out capacity transfer when achieving not power-off.In other embodiment, described transmission mechanism also can be cam structure formula, comprise the slide bar with multiple bulge-structure and the chute supporting this slide bar, one end of each insulator contacts with each bulge-structure of slide bar, and the other end is connected with the moving contact of each vacuum interrupter.Once, slide bar bulge-structure just drives each vacuum interrupter to carry out corresponding separating brake and feed motion respectively to the every action of permanent magnet mechanism.
Concrete, described multiple connectors are divided into three types structure, be respectively: with vacuum interrupter 51 of connecting, the connector 331 that corner connection vacuum interrupter 61 is suitable, with low pressure transition vacuum interrupter 54, the connector 332 that high pressure transition vacuum interrupter 64 is suitable, with low pressure first parallel connection vacuum arc extinguishing chamber 52, low pressure second parallel connection vacuum arc extinguishing chamber 53 and star connect the suitable connector of vacuum interrupter 63 333, the vibrational power flow of three kinds of connectors can be variation, as long as ensure when permanent magnet mechanism action once when, four vacuum interrupters of low-pressure side and on high-tension side three vacuum interrupters will realize separating brake as shown in Figure 5 and making process.
From Fig. 6 to Fig. 7, the separating brake of each vacuum interrupter in high-pressure side and making process are as shown in Figure 5, when permanent magnet mechanism action once, the operate time of each vacuum interrupter is divided into T1, T2, T3, T4, and as T1, namely transformer is in the initial condition under Large Copacity, now, K4 is in closure state, and K1, K3 are in off-state, and high-pressure side winding is connected into triangle; As T2, K3, K4 are in closure state, and K1 is in off-state, and now, transition circuit is connected; As T3, K3 is in closure state, and K1, K4 are in off-state, now, only connects transition circuit; During T4, K1 is in closure state, and K3, K4 are in off-state, and now, the Y-connection of Three-Phase Transformer high voltage winding composition, namely completes the conversion connect from corner connection to star.
While high-pressure side completes the conversion of angle star, low-pressure side also carries out the conversion being parallel to series connection, concrete, as shown in Figure 1, 2, is the circuit diagram of a low-pressure side wherein phase, schematic diagram when Fig. 1 is Large Copacity, schematic diagram when Fig. 2 is low capacity.The opening and closing process of each vacuum interrupter in figure mesolow side as shown in Figure 5, when permanent magnet mechanism action once, the operate time of each vacuum interrupter is divided into T1, T2, T3, T4, as T1, namely transformer is in the initial condition under Large Copacity, K5, K6 are in closure state, and K7, K8 are in off-state, in the 3rd section of coils connected in series after two sections of coils from parallel connection of coils of low-pressure side winding; As T2, K5, K6, K7 are in closure state, and K8 is in off-state, and now, transition circuit is switched on; As T3, K7, K8 are in closure state, and K5, K6 are in off-state, only connect transition circuit; As T4, K8 is in closure state, and K5, K6, K7 are in off-state, and now, three sections of coils of low-pressure side winding are connected, and namely complete the conversion from being parallel to series connection.
The present invention is by being all independently provided with vacuum interrupter by each contact contact in high-low pressure contact system, and arc extinction performance is good, and the life-span is long, non-maintaining, and reliability increases, and achieves and completes capacity transfer when not power-off; Adopt permanent magnet mechanism as the actuating force of each vacuum interrupter mechanical action, compared to motor spring system, structure of the present invention is simple, and run more stable, more reliably, the switching motion deadline is short, obviously eliminates the phenomenon of high failure rate.
Obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
Claims (10)
1. the loaded capacity-regulated switch of transformer, the transmission mechanism comprising high-tension coil switched system, low-voltage coil switched system, at least a set of permanent magnet mechanism (1) and match with this permanent magnet mechanism, it is characterized in that: described high-tension coil switched system comprises at least three vacuum interrupters, described low-voltage coil switched system comprises at least four vacuum interrupters, described permanent magnet mechanism back and forth drives described each vacuum interrupter to carry out separating brake and feed motion by described transmission mechanism, and then the coil of switching transformer reaches the object regulating transformer capacity.
2. the loaded capacity-regulated switch of transformer according to claim 1, it is characterized in that: multiple connectors that described transmission mechanism comprises actuator (31) and is flexibly connected with this actuator, described multiple connector other end is connected with corresponding vacuum interrupter respectively.
3. the loaded capacity-regulated switch of transformer according to claim 2, is characterized in that: described multiple connector is connected with corresponding vacuum interrupter by an insulator (38) respectively.
4. the loaded capacity-regulated switch of transformer according to claim 1, is characterized in that: described vacuum interrupter is the vacuum tube with dynamic and static contact.
5. the loaded capacity-regulated switch of transformer according to claim 1, is characterized in that: described low-voltage coil switched system comprises low pressure first parallel connection vacuum arc extinguishing chamber, low pressure second parallel connection vacuum arc extinguishing chamber, low voltage series vacuum interrupter and is in series with the low pressure transition vacuum interrupter of transition resistance; When low pressure first parallel connection vacuum arc extinguishing chamber, low pressure second parallel connection vacuum arc extinguishing chamber are when closing a floodgate, making low-voltage coil present parallel-connection structure, when low voltage series vacuum interrupter is when closing a floodgate, making low-voltage coil present cascaded structure.
6. the loaded capacity-regulated switch of transformer according to claim 5, it is characterized in that: when described low-voltage coil is in parallel-connection structure, driving mechanism drives low pressure first parallel connection vacuum arc extinguishing chamber, low pressure second parallel connection vacuum arc extinguishing chamber to close a floodgate by transmission mechanism, drives low voltage series vacuum interrupter and low pressure transition vacuum interrupter separating brake; Described low-voltage coil is converted in the process of cascaded structure by parallel-connection structure, the action of permanent magnet mechanism drive transmission device, and transmission mechanism ensures that each vacuum interrupter is by following sequential action:
Low pressure transition vacuum interrupter is first connected;
Low pressure first parallel connection vacuum arc extinguishing chamber, low pressure second parallel connection vacuum arc extinguishing chamber separating brake;
Low voltage series vacuum interrupter closes a floodgate;
Low pressure transition vacuum extinction separating brake, completes conversion.
7. the loaded capacity-regulated switch of transformer according to claim 1, is characterized in that: described high-tension coil switched system comprises corner connection vacuum interrupter, star connects vacuum interrupter and be in series with the high pressure transition vacuum interrupter of transition resistance; Described corner connection vacuum interrupter makes high-tension coil present triangle connection when closing a floodgate, star connects vacuum interrupter makes high-tension coil present Astrocytic conditioned medium when closing a floodgate.
8. the loaded capacity-regulated switch of transformer according to claim 7, it is characterized in that: when described high-tension coil is in angle connecting structure, driving mechanism drives described corner connection vacuum interrupter to close a floodgate by transmission mechanism, drives star to connect vacuum interrupter and high pressure transition vacuum interrupter separating brake; Described high-tension coil is converted in the process that star connects by corner connection, the action of permanent magnet mechanism drive transmission device, and transmission mechanism ensures that each vacuum interrupter is by following sequential action:
High pressure transition vacuum interrupter is first connected;
Corner connection vacuum interrupter separating brake;
Star connects vacuum interrupter and closes a floodgate;
High pressure transition vacuum extinction separating brake, completes conversion.
9. the loaded capacity-regulated switch of transformer according to claim 1, is characterized in that: described high-tension coil switched system comprises high pressure first parallel connection vacuum arc extinguishing chamber, high pressure second parallel connection vacuum arc extinguishing chamber, high-pressure series vacuum interrupter and is in series with the high pressure transition vacuum interrupter of transition resistance; Described high pressure first parallel connection vacuum arc extinguishing chamber, high pressure second parallel connection vacuum arc extinguishing chamber are when closing a floodgate, and described high-tension coil presents parallel-connection structure, and described high-pressure series vacuum interrupter is when closing a floodgate, and described high-tension coil presents cascaded structure.
10. the loaded capacity-regulated switch of transformer according to claim 9, it is characterized in that: when described high-tension coil is in parallel-connection structure, driving mechanism drives high pressure first parallel connection vacuum arc extinguishing chamber, high pressure second parallel connection vacuum arc extinguishing chamber to close a floodgate by transmission mechanism, drives high-pressure series vacuum interrupter and high pressure transition vacuum interrupter separating brake; When high-tension coil is converted in the process of cascaded structure by parallel-connection structure, the action of permanent magnet mechanism drive transmission device, and transmission mechanism ensures that each vacuum interrupter is by following sequential action:
High pressure transition vacuum interrupter is first connected;
High pressure first parallel connection vacuum arc extinguishing chamber, high pressure second parallel connection vacuum arc extinguishing chamber separating brake;
High-pressure series vacuum interrupter closes a floodgate;
High pressure transition vacuum extinction separating brake, completes conversion.
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| CN201510705887.9A CN105321744B (en) | 2015-10-26 | 2015-10-26 | The loaded capacity-regulated switch of transformer |
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| CN201510705887.9A CN105321744B (en) | 2015-10-26 | 2015-10-26 | The loaded capacity-regulated switch of transformer |
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| CN105321744B CN105321744B (en) | 2019-07-26 |
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