CN206271528U - A kind of low-voltage three-phase load autobalance transformer - Google Patents
A kind of low-voltage three-phase load autobalance transformer Download PDFInfo
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- CN206271528U CN206271528U CN201621323920.8U CN201621323920U CN206271528U CN 206271528 U CN206271528 U CN 206271528U CN 201621323920 U CN201621323920 U CN 201621323920U CN 206271528 U CN206271528 U CN 206271528U
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Abstract
The utility model proposes a kind of low-voltage three-phase load autobalance transformer.Including three iron cores A, B, C and first side winding and secondary side winding, the first side winding includes the winding AN being wound on iron core A, the winding BN being wound on iron core B and the winding CN being wound on iron core C；The secondary side winding includes A phase winding a0, f0 and be for being wound on iron core A, is wound on B phase winding b0, d0 and cf on iron core B, is wound on C phase windings c0, e0 and ad on iron core C；Described winding ad, d0 are connected by wired in series, and are connected in parallel with winding a0；Described winding be, e0 are connected by wired in series, and are connected in parallel with winding b0；Described winding cf, f0 are connected by wired in series, and are connected in parallel with winding c0.The utility model can improve the CURRENT DISTRIBUTION of primary side under the conditions of the secondary lateral load of power distribution network is asymmetric so that three-phase current tends to balance, so as to reduce the loss of transformer and transmission line of electricity.
Description
Technical field
The utility model is related to field transformer, specifically a kind of low-voltage three-phase load autobalance transformer.
Background technology
The non-linear, asymmetric loads such as rectifying installation, electric arc furnaces and electric railway in industrial power distribution network result in and be
Motor and transformer heating, vibration aggravation, cause protective relaying maloperation to be made in system, also cause that line loss is significantly increased, seriously
Beyond electric power system line loss performance assessment criteria, the huge waste of electric energy is caused.
At present to idle, three-phase imbalance the problems such as, mainly takes the modes such as load planning, balanced functions device to carry out
Administer, increased extra hardware spending.
Utility model content
For the part of above shortcomings in the prior art, the technical problems to be solved in the utility model is to provide one kind
Low-voltage three-phase load autobalance transformer.
The technical scheme that the utility model is used to achieve the above object is：A kind of low-voltage three-phase load autobalance becomes
Depressor, including three iron cores A, B, C and first side winding and secondary side winding, the first side winding include being wound on iron core A
On winding AN, the winding BN being wound on iron core B and the winding CN being wound on iron core C；The secondary side winding include around
A phase winding a0, f0 and be on iron core A are made, B phase winding b0, d0 and cf on iron core B is wound on, is wound on iron core C
C phase windings c0, e0 and ad；Described winding ad, d0 are connected by wired in series, and are connected in parallel with winding a0；The winding be,
E0 is connected by wired in series, and is connected in parallel with winding b0；Described winding cf, f0 are connected by wired in series, and and winding
C0 is connected in parallel.
Described three-phase windings AN, BN, CN are star-star connection structure.
The neutral point N ground connection of described three-phase windings AN, BN, CN.
Described iron core A, B, C are the stem of silicon steel sheet closed assembly.
Secondary side winding a0, f0, the equal turn numbers of be, b0, d0, cf, c0, e0 and ad.
The secondary side winding is with first side winding around to identical.
The utility model has advantages below and beneficial effect：
1. innovation is improved based on meander configuration transformer, can effectively suppress point of zero voltage drift, reduce unbalanced line
Damage, the CURRENT DISTRIBUTION of primary side can be improved under the conditions of the secondary lateral load of power distribution network is asymmetric so that three-phase current tends to flat
Weighing apparatus, so as to reduce the loss of transformer and transmission line of electricity, improves the capacity utilization of transformer.
2. primary side neutral point can be grounded, wiring is relatively simple, impedance relationship is easily achieved, to use environment requirement compared with
It is low, technology maturation, low cost of manufacture.
Brief description of the drawings
Fig. 1 is the front view of the utility model external structure；
Fig. 2 is the top view of the utility model internal structure；
Fig. 3 is first side winding wiring diagram of the present utility model；
Fig. 4 is secondary side winding wiring diagram of the present utility model.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to the utility model.
As shown in Figure 1 and Figure 2, the utility model includes：
a）Coil 6, comprising first side winding and secondary side winding.First side winding is made up of three-phase windings AN, BN, CN,
Using star-star connection, its neutral point N can be grounded.Secondary side winding includes A phase windings a0, f0 and be；B phase windings b0, d0 and
cf；C phase windings c0, e0 and ad.Described winding ad, d0 are connected by wired in series, and are connected in parallel with winding a0；The winding
Be, e0 are connected by wired in series, and are connected in parallel with winding b0；Described winding cf, f0 by wired in series connect, and with around
Group c0 is connected in parallel, as shown in Figure 4.Three-phase windings AN, BN, CN are star-star connection structure, as shown in figure 3, neutral point N is grounded.
Secondary side winding a0, f0, the equal turn numbers of be, b0, d0, cf, c0, e0 and ad.Secondary side winding and first side winding around to
It is identical.Secondary side winding d0 and ad, e0 and be, f0 and cf are connected using indentation antiphase.
b）Iron core 5, three iron cores A, B, C are formed by high-quality silicon steel sheet closed assembly.
c）Folder 4, feet 1, are made by section bar.
Iron core 5 as product skeleton, coil 6 is enclosed within the stem of iron core 5, by drawing screw rod 2, other screw rod 3, folder 4, feet
1 is fixedly clamped.
Load balance transformer be in symmetrical operation state when, secondary side a phase load electric currents be by the master on A phase iron cores around
Relation is provided jointly in proportion for zigzag connection additional winding d0, ad on group a0 and B, C phase stem.
If being in asymmetric operation state（It is assumed that secondary side a phase current magnitudes are bigger compared with remaining two-phase）, the heavy duty is mutually negative
Lotus can cause secondary side main winding a0 and the electric current of additional winding d0, ad to increase jointly in proportion.It is secondary side a in connection plan
Mutually reverse position is arranged in B, C stem and is connected in series additional winding d0, ad of offer electric current respectively, due to the electricity of inside transformer
Magnetic induction, the change of secondary side a phase load electric currents inherently causes A, B, C stem main flux while changing, end reaction
Come on to primary side three-phase current.
Each umber of turn of balancing the load Circuit Fault on Secondary Transformer is equal, therefore the zero sequence magnetic potential of secondary side winding can be supported mutually
Disappear, zero sequence main flux is zero, also will be attached so as to greatly reduce zero sequence without zero-sequence component in the electric current of first side winding sensing
Plus iron loss；And because device zero sequence excitation impedance is close to zero, therefore null offset phenomenon when can well suppress asymmetric operation, protect
Secondary side phase voltage is symmetrical during card single-phase load.
The transformer improves the mode of connection by the star-star connection mode of first side winding and the indentation of secondary side winding,
A kind of new zigzag connection balancing the load transformer is made, it is used in parallel with load unbalanced power network, can effectively suppress current
The loss of the transmission line of electricity that the zero migration that power network three-phase electricity consumption imbalance causes is caused increases.
Claims (6)
1. a kind of low-voltage three-phase load autobalance transformer, it is characterised in that including three iron cores A, B, C and first side winding
And secondary side winding, the first side winding include the winding AN being wound on iron core A, the winding BN that is wound on iron core B and
It is wound on the winding CN on iron core C；The secondary side winding includes A phase winding a0, f0 and be for being wound on iron core A, coiling
B phase winding b0, d0 and cf on iron core B, are wound on C phase windings c0, e0 and ad on iron core C；Described winding ad, d0 pass through
Wired in series is connected, and is connected in parallel with winding a0；Described winding be, e0 are connected by wired in series, and in parallel with winding b0
Connection；Described winding cf, f0 are connected by wired in series, and are connected in parallel with winding c0.
2. a kind of low-voltage three-phase load autobalance transformer according to claim 1, it is characterised in that the three-phase around
Group AN, BN, CN are star-star connection structure.
3. a kind of low-voltage three-phase load autobalance transformer according to claim 2, it is characterised in that the three-phase around
The neutral point N ground connection of group AN, BN, CN.
4. a kind of low-voltage three-phase load autobalance transformer according to claim 1, it is characterised in that the iron core A,
B, C are the stem of silicon steel sheet closed assembly.
5. a kind of low-voltage three-phase load autobalance transformer according to claim 1, it is characterised in that the secondary side
The equal turn numbers of winding a0, f0, be, b0, d0, cf, c0, e0 and ad.
6. a kind of low-voltage three-phase load autobalance transformer according to claim 1, it is characterised in that the secondary side
Winding is with first side winding around to identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621323920.8U CN206271528U (en) | 2016-12-05 | 2016-12-05 | A kind of low-voltage three-phase load autobalance transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621323920.8U CN206271528U (en) | 2016-12-05 | 2016-12-05 | A kind of low-voltage three-phase load autobalance transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206271528U true CN206271528U (en) | 2017-06-20 |
Family
ID=59042766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621323920.8U Expired - Fee Related CN206271528U (en) | 2016-12-05 | 2016-12-05 | A kind of low-voltage three-phase load autobalance transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN206271528U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783085A (en) * | 2016-12-05 | 2017-05-31 | 德阳新源电器有限责任公司 | Low-voltage three-phase load autobalance transformer |
-
2016
- 2016-12-05 CN CN201621323920.8U patent/CN206271528U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783085A (en) * | 2016-12-05 | 2017-05-31 | 德阳新源电器有限责任公司 | Low-voltage three-phase load autobalance transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170620 Termination date: 20191205 |
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| CF01 | Termination of patent right due to non-payment of annual fee |