CN105788834A - Adjustable-capacity transformer with lightning protection function - Google Patents
Adjustable-capacity transformer with lightning protection function Download PDFInfo
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- CN105788834A CN105788834A CN201610249056.XA CN201610249056A CN105788834A CN 105788834 A CN105788834 A CN 105788834A CN 201610249056 A CN201610249056 A CN 201610249056A CN 105788834 A CN105788834 A CN 105788834A
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- extinguishing chamber
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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
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention discloses an adjustable-capacity transformer with a lightning protection function. The adjustable-capacity transformer comprises a low-voltage winding and a high-voltage winding, wherein in a high-capacity state, the windings adopt a Dyn11 connecting mode; when the state is switched into small capacity, the windings adopt a Yzn11 connecting mode. The adjustable-capacity transformer belongs to a specific adjustable-capacity transformer; when the state is switched into the small capacity, the Yzn11 connection is realized; the capability of bearing the unbalanced load is higher, i.e., stronger single-phase power supply capacity is realized, so that the adjustable-capacity transformer is particularly suitable for places (such as villages and mountainous areas) in which the three-phase load is difficult to balance; good lightning protection characteristic is realized; the adjustable-capacity transformer is particularly suitable for being used as a lightning protection transformer in multi-lightning areas or areas with high soil electrical resistivity.
Description
Technical field
The invention belongs to power industry technical field of transformer equipment, particularly relate to a kind of capacitance-adjustable transformer with lightning protection function.
Background technology
Loaded capacity-regulated transformer is a kind of transformator with two kinds of rated capacities of size, according to payload, utilize corresponding capacitance switch connected mode of switching transformer winding when not cutting off the electricity supply, then realize transformator switching between two kinds of different capabilities.
The lightning protection measures of loaded capacity-regulated transformer realizes mainly by external lightning protection device, and this its cost height of device carrying out lightning protection by destroying self structure, lightning protection effect is not good；
And the loaded capacity-regulated transformer of current commonplace use is high-pressure side winding is the structure that D-Y changes, low-pressure side winding is parallel-serial conversion, make its lightning protection structure particularly complicated, and, this capacitance-adjustable transformer is that Yyn0 couples when low capacity, and along with single-phase electric devices power is increasing, quantity gets more and more, when the factors such as temporary electricity, line fault and seasonal electricity consumption cause distribution transformer three-phase load unbalance, Yyn0 connection can cause problems with: (1) increases line loss and transformer loss；(2) reduce transformator to exert oneself；(3) neutral point produces displacement, phase voltage or be increased to line voltage, burns out electrical equipment；(4) transformer outlet voltage is unbalanced, and user side three-phase voltage deviation is relatively big, and quality of voltage can not be guaranteed；(5) produce harmonic voltage and pollute electrical network.
Summary of the invention
For the problems referred to above, the present invention provides a kind of lightning protection structure simple and is resistant to the capacitance-adjustable transformer with lightning protection function of three-phase imbalance.
To achieve these goals, the present invention is by the following technical solutions: a kind of capacitance-adjustable transformer with lightning protection function, including low pressure winding and high pressure winding, when being in Large Copacity state, described winding adopts Dyn11 bind mode；When switching to low capacity, described winding adopts Yzn11 bind mode.The present invention is a kind of special capacitance-adjustable transformer, connect with Yzn11 when switching to achieve when low capacity, having the stronger ability bearing unbalanced load, namely have stronger single phase power supply ability, this is difficult to place (such as rural area and the mountain area) particularly suitable balanced for threephase load；And there is good anti-lightning strike characteristic, it is particularly suitable for the area high in multi-thunder area or soil resistivity and is used as lightning protection transformer.
As preferably, described low pressure winding includes two groups of coils of equal turn numbers；It is said that in general, common transformer Yzn11 connect cost can than Yyn0 connection high, but capacitance-adjustable transformer this in particular cases, Yyn0 connection low-pressure side winding be adopt and string structure, namely low pressure winding is divided into three sections；The process rounded up must be done when determining this three sections of umber of turns, this causes that only the small number of number of turn could meet the error requirements of voltage ratio, and these numbers of turn meeting voltage ratio error requirements are not most material saving, thus obtained capacitance-adjustable transformer is uneconomic；From transformer manufacturing angle, the winding being divided into three sections is not easy to sequence in arrangement, makes window activity coefficient not high；And low-pressure side Winding Design of the present invention becomes two-part structure, the number of turn can arbitrarily determine, therefore, it is possible to select the design of most material saving, and two groups of windings easily sequence and make window activity coefficient high；These factors cause capacitance-adjustable transformer this in particular cases, adopt Yzn11 connection capacitance-adjustable transformer cost on the contrary than Yyn0 connection low.
As preferably, described two groups of coils are axially symmetric distribution or width to distribution coiling.
Or as preferably, described two groups of coils be parallel side-by-side coiling or overlap coiling and replace.
Further, a capacitance switch is also included.
As preferably, described capacitance switch includes high pressure switched system and low pressure switched system, and the described each phase of low pressure switched system includes the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber, the vacuum interrupter and be in series with the low pressure transition vacuum interrupter of transition resistance of connecting；
When described first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber are in "on" position, when described series connection vacuum interrupter and low pressure transition vacuum interrupter are in gate-dividing state simultaneously so that two groups of coils in each phase of transformer low voltage winding present and are connected in parallel；
When described series connection vacuum interrupter is in "on" position, when simultaneously the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber and low pressure transition vacuum interrupter are in gate-dividing state so that in transformer low voltage winding, one group of coil of a certain phase presents differential concatenation with one group of coil of an other phase and is connected.
Or as preferably, described capacitance switch includes high pressure switched system and low pressure switched system, and the described each phase of low pressure switched system includes the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber, the vacuum interrupter and be parallel with the transition vacuum interrupter of transition resistance of connecting；
When described first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber are in "on" position, when described series connection vacuum interrupter and low pressure transition vacuum interrupter are in gate-dividing state simultaneously so that two groups of coils in each phase of transformer low voltage winding present and are connected in parallel；
When described series connection vacuum interrupter is in "on" position, when simultaneously the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber and low pressure transition vacuum interrupter are in gate-dividing state so that in transformer low voltage winding, one group of coil of a certain phase presents differential concatenation with one group of coil of an other phase and is connected.
Further, the driving mechanism for driving each vacuum interrupter action is also included.
Described driving mechanism drives each vacuum interrupter according to following sequential action:
First by low pressure transition vacuum interrupter separating brake；
Then the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber are all closed a floodgate；
Finally by series connection vacuum interrupter separating brake so that transformer low voltage winding completes the conversion being attached to zn connection by yn.
Described driving mechanism drives each vacuum interrupter according to following sequential action:
First low pressure transition vacuum interrupter is closed a floodgate；
Then by the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd equal separating brake of parallel connection vacuum arc extinguishing chamber；
Then series connection vacuum interrupter is closed a floodgate；
Finally by low pressure transition vacuum extinction separating brake so that transformer low voltage winding completes the conversion being attached to zn connection by yn.
In sum, the invention has the beneficial effects as follows: the present invention is by when capacity transfer to low capacity state, adopting Yzn11 bind mode, not only have the stronger ability bearing unbalanced load, and have good anti-lightning strike characteristic；Overall structure is simple, economical and energy saving, is suitable to promote.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of present invention high-pressure side winding when being in low capacity.
Fig. 2 is the circuit diagram of present invention high-pressure side winding when being in Large Copacity.
Fig. 3 is the another kind of circuit diagram of present invention high-pressure side winding when being in low capacity.
Fig. 4 is the another kind of circuit diagram of present invention high-pressure side winding when being in Large Copacity.
Fig. 5 is the circuit diagram of present invention low-pressure side winding when being in low capacity.
Fig. 6 is the circuit diagram one of present invention low-pressure side winding in capacity transformation process.
Fig. 7 is the circuit diagram two of present invention low-pressure side winding in capacity transformation process.
Fig. 8 is the circuit diagram of present invention low-pressure side winding when being in Large Copacity.
Fig. 9 is the another kind of circuit diagram of present invention low-pressure side winding when being in low capacity.
Figure 10 is the another kind of circuit diagram of present invention low-pressure side winding when being in Large Copacity.
Figure 11 is another circuit diagram of present invention low-pressure side winding when being in low capacity.
Figure 12 is another circuit diagram of present invention low-pressure side winding when being in Large Copacity.
Figure 13 is the action timing diagram of each vacuum interrupter in the low-pressure side winding of the capacitance switch of the present invention.
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 express time.
Detailed description of the invention
In order to make those skilled in the art be better understood from the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete description.
A kind of capacitance-adjustable transformer with lightning protection function, including three-phase high-voltage winding, three-phase low-voltage winding, loaded capacity-regulated switch and other metals and the nonmetal structure part that constitute transformator, by the effect of capacitance switch, when making transformator be in Large Copacity state, described winding adopts Dyn11 bind mode；When switching to low capacity, described winding adopts Yzn11 bind mode；
The low pressure winding of each phase includes two sections of coils of equal turn numbers, these two sections of coils are wound on iron core by axially symmetric distribution, certainly, in other embodiments, can also be that two sections of coil width are wound on iron core to distribution, or two sections of coil parallel side-by-side are wound on iron core, or it are two sections of coil overlap coilings and replace；
In the present embodiment, each phase low pressure winding includes two sections of coils, it is also possible to be adopt the first coil group and the second coil groups, the equal turn numbers of two groups of coil groups that have multistage coil to combine, axially symmetric distribution is wound on iron core respectively, also can reach same technique effect；
Described loaded capacity-regulated switch includes high-tension coil switched system, low-voltage coil switched system and driving mechanism, for one, in each phase, as shown in Figure 1, 2, described high-tension coil switched system includes corner connection vacuum interrupter K2, star meets vacuum interrupter K1 and is parallel with the high pressure transition vacuum interrupter Kg of transition resistance R, described corner connection vacuum interrupter K2 makes high-tension coil have a generally triangular shape when closing a floodgate, and connection, star meet vacuum interrupter K1 and make high-tension coil present star connection when closing a floodgate；Concrete, in the present embodiment, described high pressure transition vacuum interrupter and described corner connection vacuum interrupter are connected in series；In other embodiments, this high pressure transition vacuum interrupter can also connect vacuum interrupter with star and be connected in series, or as shown in Figure 3,4, meet vacuum interrupter K1 at corner connection vacuum interrupter K2 and star to connect respectively a high pressure transition vacuum interrupter Kg, and this high pressure transition vacuum interrupter is all connected in parallel to a transition resistance R.
Concrete, for one, as viewed in figures 5-8, low pressure switched system described in each phase includes the first parallel connection vacuum arc extinguishing chamber Kb1, the second parallel connection vacuum arc extinguishing chamber Kb2, the 3rd parallel connection vacuum arc extinguishing chamber Kb3, series connection vacuum interrupter Kc, is parallel with the low pressure transition vacuum interrupter Kg of transition resistance R；Certainly, in other embodiments, can also be that transition resistance R and described low pressure transition vacuum interrupter Kg is connected in series, transition resistance R is connected serially to described low pressure transition vacuum interrupter Kg to constitute transition branch road, this transition branch road can be connected in parallel on the two ends of the second parallel connection vacuum arc extinguishing chamber Kb2, such as Fig. 9, shown in 10；Or, it is also possible to by this transition branch circuit parallel connection at the two ends of the 3rd parallel connection vacuum arc extinguishing chamber Kb3, as shown in Figure 11,12；Wherein, Fig. 9, shown in 11 time, when capacitance-adjustable transformer is in low capacity state, the circuit diagram of each vacuum interrupter and low-voltage coil；Figure 10, shown in 12 time, when being in Large Copacity state of capacitance-adjustable transformer, the circuit diagram of each vacuum interrupter and low-voltage coil.
Described driving mechanism includes a set of permanent magnet mechanism and the actuating device coordinated with this permanent magnet mechanism, all of vacuum interrupter action is back and forth driven by this actuating device, each vacuum interrupter is made to carry out separating brake and feed motion by the sequential designed, and then each coil connected mode in change Transformer Winding, to reach to regulate the purpose of transformer capacity；
Concrete, as viewed in figures 5-8, the equal turn numbers of the first paragraph coil La1 and second segment coil La2 of a phase, the front end of first paragraph coil La1 is connected with the first described parallel connection vacuum arc extinguishing chamber Kb1, series connection vacuum interrupter Kc respectively, and the rear end of first paragraph coil La1 connects the second described parallel connection vacuum arc extinguishing chamber Kb2；The rear end of second segment coil La2 connects the 3rd described parallel connection vacuum arc extinguishing chamber Kb3；
In order to express easily, it is labeled as node m by first paragraph coil La1 in Fig. 5 and between the second parallel connection vacuum arc extinguishing chamber Kb2, node n will be labeled as between second segment coil La2 and the second parallel connection vacuum arc extinguishing chamber Kb2, by wire 1, the node m of a phase is connected to the node n of c phase, by wire 2, the node m of b phase is connected to the node n of a phase, by wire 3, the node m of c phase is connected to the node n of b phase；
So, when capacitance-adjustable transformer is in low capacity state, low pressure winding is with reference to shown in Fig. 5, and high pressure winding is with reference to shown in Fig. 1:
During low capacity state, series connection vacuum interrupter Kc in each phase low pressure winding is in "on" position, simultaneously the first parallel connection vacuum arc extinguishing chamber Kb1, the second parallel connection vacuum arc extinguishing chamber Kb2, the 3rd parallel connection vacuum arc extinguishing chamber Kb3 and low pressure transition vacuum interrupter Kg are in gate-dividing state, and now in transformer low voltage winding, one section of coil of a certain phase presents differential concatenation with one section of coil of an other phase and is connected；Concrete, the second segment coil La2 of a phase reversely concatenates the first paragraph coil Lb1 of b phase, the second segment coil Lb2 of b phase reversely concatenates the second segment coil Lc2 of first paragraph coil Lc1, the c phase of c phase and reversely concatenates the first paragraph coil La1 of a phase, makes the low pressure winding of a, b, c three-phase present zn connection.
And now, as it is shown in figure 1, the high-tension coil switched system mesohigh transition vacuum interrupter Kg of each phase and star meet vacuum interrupter K1 and be in "on" position, corner connection vacuum interrupter K2 is in gate-dividing state simultaneously, three-phase high voltage coil is star connection；
When needing the capacity of switching transformer to Large Copacity, once, actuating device drives each vacuum interrupter in low-voltage coil switched system and high-tension coil switched system to carry out action according to following sequential to the action up or down of the permanent magnet mechanism in capacitance switch:
(first describing the course of action of each vacuum interrupter of low-voltage coil switched system, meanwhile, the action of each vacuum interrupter of high-tension coil switched system carries out simultaneously, is described further after a while)；Now, in low-voltage coil switched system, each vacuum interrupter of each phase will carry out action according to following sequential: first by low pressure transition vacuum interrupter Kg separating brake, and transition resistance R connects, as shown in Figure 6；When after low pressure transition vacuum interrupter Kg arc extinguishing, then the first parallel connection vacuum arc extinguishing chamber Kb1, the second parallel connection vacuum arc extinguishing chamber Kb2, the 3rd parallel connection vacuum arc extinguishing chamber Kb3 are all closed a floodgate, as shown in Figure 7；Then by series connection vacuum interrupter Kc separating brake, as shown in Figure 8, described first parallel connection vacuum arc extinguishing chamber Kb1, the second parallel connection vacuum arc extinguishing chamber Kb2, the 3rd parallel connection vacuum arc extinguishing chamber Kb3 are in "on" position, described series connection vacuum interrupter Kc and low pressure transition vacuum interrupter Kg is in gate-dividing state simultaneously, and first paragraph coil in each phase of transformer low voltage winding and second segment coil present and be connected in parallel；Three-phase all so circulates and connects to form new winding, then by star connection mode, three-phase windings is connect, and namely obtains the yn connection of low pressure winding；By arranging five vacuum interrupters, it is ensured that low pressure winding reliably imitates arc extinguishing when being attached to the conversion of yn connection under uninterrupted current conditions by zn, reaches the purpose of switching capacity.
As shown in figure 13, for low-voltage coil switched system action timing diagram of each vacuum interrupter in handoff procedure；Concrete, permanent magnet mechanism action time once is divided into tetra-time periods of T1-T4, and during the every action of permanent magnet mechanism one time, whole process needs consider the place of arc extinguishing i.e. vacuum interrupter by close a floodgate separating brake time, vacuum interrupter is then negligible by the arc produced in separating brake to the process closed a floodgate；
Concrete, when being in T1 moment, Kg starts by closing a floodgate to separating brake, T1-T3 during this period of time then confession Kg carry out arc extinguishing；When arriving T3 moment, Kg has sufficient time to realize reliable arc extinguishing, can Kb1, Kb2, Kb3 be carried out by separating brake to the operation closed a floodgate, (and separating brake is negligible to the arc of generation in the process closed a floodgate), so it is very short that the interval of T3-T4 can be arranged, from figure；After minibreak, arrive the T4 moment, by Kc by the separating brake that closes a floodgate, complete conversion.As shown in Figure 13, in whole transformation process, only required time for arc extinguishing at low pressure transition vacuum interrupter Kg by the separating brake that closes a floodgate, and Kb1, Kb2, Kb3 carry out by separating brake to the operation closed a floodgate with little need for time arc extinguishing, so the most of the time can be distributed to Kg arc extinguishing by us, what namely the T2-T3 in Figure 13 can be arranged is longer, while ensure that effective arc extinguishing, it is ensured that the quenching time of whole handoff procedure is in very short scope.
Otherwise, when three-phase low-voltage coil is converted to zn connection by yn connection by needs, for one, step is specific as follows: series connection vacuum interrupter Kc first closes a floodgate；Then the first parallel connection vacuum arc extinguishing chamber Kb1, the second parallel connection vacuum arc extinguishing chamber Kb2, the 3rd parallel connection vacuum arc extinguishing chamber Kb3 separating brake；Last low pressure transition vacuum interrupter Kg closes a floodgate, and completes conversion, and other details repeat no more；
Driving mechanism, while driving each vacuum interrupter action of low-voltage coil switched system, also drives each vacuum interrupter in each phase of high-tension coil switched system and carries out action according to following sequential:
First high pressure transition vacuum interrupter Kg separating brake；Then corner connection vacuum interrupter K2 is closed a floodgate；Then star is connect vacuum interrupter K1 separating brake；Finally by high pressure transition vacuum extinction Kg separating brake, complete conversion；Otherwise, when needs high-tension coil by corner connection be converted to star connect time, step is contrary.
In sum, when this capacitance-adjustable transformer is in low capacity state, described winding adopts Yzn11 bind mode；When switching to Large Copacity, described winding adopts Dyn11 bind mode.
First, the two-part loop construction of low pressure winding so that the low pressure winding of capacitance-adjustable transformer achieves and is attached to zn connection by yn or is attached to the transformation of yn connection by zn；Adopting Yzn11 connection during capacitance-adjustable transformer low capacity, have the stronger ability bearing unbalanced load, namely have stronger single phase power supply ability, this is difficult to place (such as rural area and the mountain area) particularly suitable balanced for threephase load；Meanwhile, low-pressure side adopts two-part coil combination, it is achieved that when switching to low capacity, the zn bind mode of low pressure winding has good anti-lightning strike characteristic, is particularly suitable for the area high in multi-thunder area or soil resistivity and is used as lightning protection transformer.
The low-pressure side winding of the present invention is divided into two sections of equal turn numbers, and the number of turn can arbitrarily determine, therefore, it is possible to select the design of most material saving, and two sections of windings easily sequence and make window activity coefficient high.These factors cause capacitance-adjustable transformer this in particular cases, Yzn11 connection capacitance-adjustable transformer cost on the contrary than Yyn0 connection low.
Furthermore, the capacitance switch adaptive with the present invention adopts vacuum interrupter composition high pressure winding switched system and low pressure winding switched system, efficiently solves the arc extinguishing problem of high-pressure side and low-pressure side, and non-maintaining, the life-span is long；With permanent magnet mechanism as driving mechanism, simple in construction, reliability is high, and switching action completes rapidly, switching the persistent period of switching overvoltage and the persistent period of voltage waveform distortion that produce also correspondingly shorten.It addition, in the present embodiment, all of vacuum interrupter is the vacuum tube with dynamic and static contact, its reliability is high, can guarantee that and effectively carries out arc extinguishing.
Additionally it is briefly described under lower another kind of structure the handoff procedure of each vacuum interrupter again, it is illustrated in figure 9 transformator when being in Large Copacity state, the circuit diagram of low pressure winding side, when needs switch to low capacity, described driving mechanism drives each vacuum interrupter according to following sequential action: first closed a floodgate by low pressure transition vacuum interrupter Kg；Then by the first parallel connection vacuum arc extinguishing chamber Kb1, the second parallel connection vacuum arc extinguishing chamber Kb2, the 3rd equal separating brake of parallel connection vacuum arc extinguishing chamber Kb3；Then series connection vacuum interrupter Kc is closed a floodgate；Finally by low pressure transition vacuum extinction separating brake so that low pressure winding completes the conversion being attached to zn connection by yn, obtains as shown in Figure 10, namely low pressure winding is zn connection.
Figure 11, the structure of 12 are close with the structure of Fig. 9,10, repeat no more concrete handoff procedure herein.
Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, all should belong to the scope of protection of the invention.
Claims (10)
1. there is a capacitance-adjustable transformer for lightning protection function, including low pressure winding and high pressure winding, it is characterised in that: when being in Large Copacity state, described winding adopts Dyn11 bind mode；When switching to low capacity, described winding adopts Yzn11 bind mode.
2. a kind of capacitance-adjustable transformer with lightning protection function according to claim 1, it is characterised in that: described low pressure winding includes two groups of coils of equal turn numbers.
3. a kind of capacitance-adjustable transformer with lightning protection function according to claim 2, it is characterised in that: described two groups of coils are axially symmetric distribution or width to distribution coiling.
4. a kind of capacitance-adjustable transformer with lightning protection function according to claim 2, it is characterised in that: described two groups of coils are parallel side-by-side coiling or overlapping coiling and replace.
5. a kind of capacitance-adjustable transformer with lightning protection function according to claim 1, it is characterised in that: also include a capacitance switch.
6. a kind of capacitance-adjustable transformer with lightning protection function according to claim 5, it is characterized in that: described capacitance switch includes high pressure switched system and low pressure switched system, the described each phase of low pressure switched system includes the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber, the vacuum interrupter and be in series with the low pressure transition vacuum interrupter of transition resistance of connecting；
When described first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber are in "on" position, when described series connection vacuum interrupter and low pressure transition vacuum interrupter are in gate-dividing state simultaneously so that two groups of coils in each phase of transformer low voltage winding present and are connected in parallel；
When described series connection vacuum interrupter is in "on" position, when simultaneously the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber and low pressure transition vacuum interrupter are in gate-dividing state so that in transformer low voltage winding, one group of coil of a certain phase presents differential concatenation with one group of coil of an other phase and is connected.
7. a kind of capacitance-adjustable transformer with lightning protection function according to claim 5, it is characterized in that: described capacitance switch includes high pressure switched system and low pressure switched system, the described each phase of low pressure switched system includes the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber, the vacuum interrupter and be parallel with the transition vacuum interrupter of transition resistance of connecting；
When described first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber are in "on" position, when described series connection vacuum interrupter and low pressure transition vacuum interrupter are in gate-dividing state simultaneously so that two groups of coils in each phase of transformer low voltage winding present and are connected in parallel；
When described series connection vacuum interrupter is in "on" position, when simultaneously the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber and low pressure transition vacuum interrupter are in gate-dividing state so that in transformer low voltage winding, one group of coil of a certain phase presents differential concatenation with one group of coil of an other phase and is connected.
8. a kind of capacitance-adjustable transformer with lightning protection function according to claim 6 or 7, it is characterised in that: also include the driving mechanism for driving each vacuum interrupter action.
9. a kind of capacitance-adjustable transformer with lightning protection function according to claim 8, it is characterised in that: described driving mechanism drives each vacuum interrupter according to following sequential action:
First by low pressure transition vacuum interrupter separating brake；
Then the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd parallel connection vacuum arc extinguishing chamber are all closed a floodgate；
Finally by series connection vacuum interrupter separating brake so that transformer low voltage winding completes the conversion being attached to zn connection by yn.
10. a kind of capacitance-adjustable transformer with lightning protection function according to claim 8, it is characterised in that: described driving mechanism drives each vacuum interrupter according to following sequential action:
First low pressure transition vacuum interrupter is closed a floodgate；
Then by the first parallel connection vacuum arc extinguishing chamber, the second parallel connection vacuum arc extinguishing chamber, the 3rd equal separating brake of parallel connection vacuum arc extinguishing chamber；
Then series connection vacuum interrupter is closed a floodgate；
Finally by low pressure transition vacuum extinction separating brake so that transformer low voltage winding completes the conversion being attached to zn connection by yn.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910020927.4A CN109637793B (en) | 2016-04-20 | 2016-04-20 | Capacity-adjusting transformer with lightning protection function |
| CN201610249056.XA CN105788834B (en) | 2016-04-20 | 2016-04-20 | A kind of capacitance-adjustable transformer with lightning protection function |
| PCT/CN2017/081185 WO2017181960A1 (en) | 2016-04-20 | 2017-04-20 | Lightning protection on-load regulated-capacity transformer, and on-load regulated-capacity switch |
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| CN201610249056.XA CN105788834B (en) | 2016-04-20 | 2016-04-20 | A kind of capacitance-adjustable transformer with lightning protection function |
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| CN105788834A true CN105788834A (en) | 2016-07-20 |
| CN105788834B CN105788834B (en) | 2019-10-18 |
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| CN201610249056.XA Active CN105788834B (en) | 2016-04-20 | 2016-04-20 | A kind of capacitance-adjustable transformer with lightning protection function |
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| WO (1) | WO2017181960A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017181960A1 (en) * | 2016-04-20 | 2017-10-26 | 浙江宝威电气有限公司 | Lightning protection on-load regulated-capacity transformer, and on-load regulated-capacity switch |
| CN109559881A (en) * | 2016-04-20 | 2019-04-02 | 浙江宝威电气有限公司 | A kind of loaded capacity-regulated switch |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109378189B (en) * | 2018-12-03 | 2024-02-27 | 山东电工电气集团智能电气有限公司 | Transformer low-voltage winding and on-load capacity-regulating transformer |
| CN110459388B (en) * | 2019-09-03 | 2024-04-09 | 浙江江山变压器股份有限公司 | Radial free-arrangement continuous dry-type transformer winding and processing method thereof |
| CN111029120A (en) * | 2019-12-27 | 2020-04-17 | 广东电网有限责任公司电力科学研究院 | On-load capacity and voltage regulating switch and system applied to dry-type transformer |
| CN114285341B (en) * | 2021-12-29 | 2023-12-15 | 西安交通大学 | Transient optimization control system and method for electric electronic on-load arcless capacity-regulating transformer |
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| CN109637793B (en) * | 2016-04-20 | 2020-04-10 | 浙江宝威电气有限公司 | Capacity-adjusting transformer with lightning protection function |
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| CN109559881A (en) * | 2016-04-20 | 2019-04-02 | 浙江宝威电气有限公司 | A kind of loaded capacity-regulated switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109637793A (en) | 2019-04-16 |
| CN105788834B (en) | 2019-10-18 |
| WO2017181960A1 (en) | 2017-10-26 |
| CN109637793B (en) | 2020-04-10 |
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