CN1477656A - Fault phase compensation combined transformer - Google Patents
Fault phase compensation combined transformer Download PDFInfo
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- CN1477656A CN1477656A CNA031375944A CN03137594A CN1477656A CN 1477656 A CN1477656 A CN 1477656A CN A031375944 A CNA031375944 A CN A031375944A CN 03137594 A CN03137594 A CN 03137594A CN 1477656 A CN1477656 A CN 1477656A
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- 230000008859 change Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a fault phase compensation combined transformer, belonging to power transmission and distribution equipment. The phase-compensating fault switching device mainly comprises 3 change-over switches with 2 pairs of dynamic contacts and 1 pair of dynamic contacts. By adopting the invention, when the transformer has single-phase fault, the combined transformer can still continuously supply balanced three-phase electric energy, thereby ensuring the normal power supply to the electric equipment (including a three-phase motor) and avoiding the damage of the three-phase electric equipment due to phase failure.
Description
One, technical field
The present invention relates to a kind of combined transformer that fault is mended the phase function that has, belong to equipment for power transmission and distribution.
Two, background technology
At isolated neutral or in arc suppression coil earthing system, during by common three-phase three-column transformer-supplied, when in the distribution transformer phase fault taking place, just will make whole users' power failures, thereby influence people's operate as normal, studying and living order.A kind of " the non-interfering combined transformer of four posts three-phase unshakable in one's determination " that Chinese patent ZL98250258.3 announces, have the non-interfering characteristics of three-phase, promptly when a phase fault takes place in its inside, this transformer still can continue to keep two intact externally power supplies mutually, but can cause fault phase load (about 1/3 user) to have a power failure.As seen, current existing transformer also exists the not high enough problem of power supply reliability, particularly not only can not continue operation to three-phase power consumption equipment (as threephase motor), but also has the danger that it is burnt because of phase shortage.
Three, summary of the invention
The objective of the invention is at the deficiencies in the prior art, design and a kind ofly not only had three and do not disturb but also have concurrently the combined transformers that fault is mended the phase function mutually.
Realize that the technical scheme that the object of the invention is taked is:
A kind of fault is mended combined transformer, mainly reach and form around thereon primary coil and secondary coil, dielectric and machinery mount etc. by transformer work core limb, its primary coil whenever be in series 1 or 2 fuses, three-phase joins end to end and is connected into triangle, secondary coil is by star-star connection and draw the neutral line, it is characterized in that setting up fault and has mended the phase core limb and mend phase coil, fault benefit phase switching device shifter around fault thereon; The break contact that transformer secondary coil output is mended the phase switching device shifter through fault links to each other with the power end of low pressure master switch, link to each other with the neutral line through make contact, fault is mended the phase coil output and is linked to each other with the power end of low pressure master switch through the make contact of fault benefit phase switching device shifter.
Fault is mended the phase core limb and is mended phase coil around fault thereon and can be 1 group or 2 groups, and when being 1 group, the output that fault is mended phase coil mends mutually with fault that the make contact of switching device shifter links to each other, and tail end links to each other with the neutral line of secondary coil; When being 2 groups, fault mend phase coil along the polarity series connection after, output mends mutually with fault that the make contact of switching device shifter links to each other, tail end links to each other with the neutral line of transformer secondary coil.
Fault is mended the noncontacting switch that the phase switching device shifter mainly has the diverter switch of 2 pairs of make contact and 1 pair of break contact by 3 or have an above-mentioned functions and is formed, and when the low pressure master switch did not close a floodgate, any one diverter switch all can not be carried out change action; As long as have 1 to carry out change action in its 3 diverter switches, the work of all can not taking action again of any one switch in other 2 diverter switches; Its each diverter switch can only be reduced to 1/2 of normal value simultaneously at voltage, the electric current of place phase can carry out change action when following.
Adopt technical scheme of the present invention, when transformer generation single-phase fault (short circuit, seriously overload or high pressure winding broken string), transformer still can continue to confess the three-phase electric energy of balance, thereby guarantees user's's (comprising the three-phase power consumption equipment) supply of electric power; When phase to phase fault taking place or lack a phase high voltage source, still can provide a phase supply of electric power.The present invention both can be installed in the box-type substation, also can be installed in the general room transformer station.
Four, description of drawings
Fig. 1 has the schematic diagram of the present invention that 1 fault is mended the phase core limb.
Fig. 2 has the schematic diagram of the present invention that 2 faults are mended the phase core limb.
Fig. 3 is a wiring schematic diagram of the present invention.
Five, embodiment
Mainly by transformer work core limb I, II, III and a kind of fault benefit phase transformer of forming around thereon primary coil 2 and secondary coil 3, dielectric and machinery mount etc., its primary coil 2 whenever is in series behind 1 or 2 fuses 1, three-phase joins end to end and is connected into triangle, transformer secondary coil 3 is by star-star connection and draw neutral line n, and this transformer has fault and mends phase core limb IV and mend phase coil 4, fault benefit phase switching device shifter 6 around fault thereon; Transformer secondary coil 3 outputs are mended the break contact QK of phase switching device shifter 6 through fault
2Link to each other with the power end of low pressure master switch 7, through make contact QK
1N links to each other with the neutral line, and fault is mended phase coil 4 output d mend phase switching device shifter 6 through fault make contact QK
2Link to each other with the power end of low pressure master switch 7.
Fault is mended phase switching device shifter 6 and is mainly had 2 couples of make contact QK by 3
1, QK
3With 1 couple of break contact QK
2Diverter switch or the noncontacting switch with above-mentioned functions form, when low pressure master switch 7 did not close a floodgate, any one diverter switch all can not be carried out change action.
Fault is mended phase core limb IV and is mended phase coil 4 around fault thereon and can be 1 group or 2 groups, and when being 1 group, the output d that fault is mended phase coil 4 mends the make contact QK of switching device shifter 6 mutually with fault
3Link to each other, tail end links to each other with the neutral line n of secondary coil 3; When being 2 groups, after fault was mended phase coil 4 suitable polarity series connection, output d mended the make contact QK of switching device shifter 6 mutually with fault
3Link to each other, tail end links to each other with the neutral line n of secondary coil 3.
Fault is mended phase switching device shifter 6 and is mainly had 2 couples of make contact QK by 3
1, QK
3With 1 couple of break contact QK
2Diverter switch or the noncontacting switch with above-mentioned functions form, when low pressure master switch 7 did not close a floodgate, any one diverter switch all can not be carried out change action; As long as have 1 to carry out change action in its 3 diverter switches, the work of all can not taking action again of any one switch in other 2 diverter switches; Its each diverter switch can only be reduced to 1/2 of normal value simultaneously at voltage, the electric current of place phase can carry out change action when following.
Embodiment one:
Referring to Fig. 1 and Fig. 3, mend phase core limb IV and when fault was thereon mended phase coil 4 and is 1 group, promptly transformer was made of 4 core limbs when fault, wherein core limb I, II, III are the operate as normal post, are wound with primary coil 2 and secondary coil 3 on it; Primary coil 2 whenever is in series behind 1 or 2 fuses 1, and three-phase joins end to end and is connected into triangle, and 3 in secondary coil is by star-star connection and draw neutral line n.Core limb IV is wound with on it and mends phase coil 4 for mending the phase post, and its output d mends the make contact QK of switching device shifter 6 mutually with fault
3Link to each other, tail end links to each other with the neutral line n of secondary coil 3.
Described fault is mended the noncontacting switch that phase switching device shifter 6 mainly has the diverter switch of 2 pairs of make contact and 1 pair of break contact by 3 or have an above-mentioned functions and is formed, when realizing that by logic control low pressure master switch 7 does not close a floodgate, any one diverter switch all can not be carried out change action, as long as have 1 to carry out change action in 3 diverter switches of fault benefit phase switching device shifter 6, any one switch in other 2 diverter switches work of all can not taking action again, simultaneous faults are mended phase switching device shifter 6 each diverter switch can only be at the voltage of place phase, electric current is reduced to 1/2 of normal value simultaneously can carry out change action when following.
During operate as normal, the present invention is closed a floodgate by high voltage isolator 5 and send electricity, on its low pressure outlet terminal a, b, the c normal output voltage is arranged.This voltage is mended through fault and is installed 6 break contact QK mutually
2After arriving low pressure master switch 7, the low pressure of closing master switch 7 can send electricity to three-phase branch road 8, carries out normal power supply work.Under normal circumstances, because voltage, load current are in the three-phase symmetry status, so magnetic flux is also symmetrical in 3 work core limbs, its resultant flux is zero, the magnetic flux of mending among the phase post IV also is zero with induced potential (promptly mending electromotive force mutually) around thereon benefit phase coil 4, mends the output of phase coil 4 no currents.This shows that normal operative condition of the present invention and common transformer are just the same.
When transformer generation single-phase fault (causing fuse fuse failure or primary coil broken string) as short circuit, there is not main flux in the fault phase core limb, the normal and phase place mutual deviation of magnetic flux is 120 ° in the core limb of two intact phases.Know according to the electrotechnics principle, the resultant flux of this two-phase should be the negative value of third phase, this resultant flux will be respectively by mend phase core limb IV and fault mutually core limb constitute the loop, and the magnetic flux in every post is about 1/2 of resultant flux, so the induced potential that fault is mended in phase coil 4 and the fault phase secondary coil also only is about 1/2 of a normal value; Obviously the induced potential in the fault benefit phase coil 4 can not be directly as the benefit phase power supply of loading.But the following general who has surrendered of secondary coil induced potential causes the decline greatly of this phase voltage and load current, and this makes change action with regard to making it possess the operation condition of this phase diverter switch.Fault is mended 1 couple of make contact QK in the phase switching device shifter 6
1With the short circuit of fault phase secondary coil, according to the principles of electric and electronic engineering, coil will have in it short circuit current to produce after by short circuit, this electric current will generate the magnetic potential of iron core being carried out degaussing again, it is path that the resultant flux of such two intact phases just will mainly be mended phase core limb IV with fault, thereby the induced potential that makes fault mend phase coil 4 reaches the level very close with normal potential and satisfies the needs of mending mutually; Simultaneous faults is mended in the phase switching device shifter 6 and the corresponding make contact QK of fault
3Fault is mended phase coil 4 connect externally benefit power supply mutually with low-voltage power supply system; And fault is mended 1 couple of break contact QK of phase switching device shifter 6 correspondences
2Then getting in touch of fault phase secondary coil and low-voltage power supply system cut off to carry out and isolate, whole benefit phase process promptly comes to an end.
When transformer inside phase to phase fault takes place or lacks a phase high voltage source, will have only in 1 core limb in 3 work core limbs of transformer normal magnetic flux will be arranged, so also will have only the generation normal potential of being on good terms externally to power in its secondary coil.Because have two-phase electromotive force and electric current undesired, any one diverter switch all can not be switched.Though this moment, this transformer can not reach the purpose of mending phase, but still can keep the normal power supply of a phase load.
Embodiment two:
Referring to Fig. 2 and Fig. 3, when fault is mended phase core limb IV and when fault is thereon mended phase coil 4 and is 2 groups, be that transformer is made of 5 core limbs, core limb I wherein, II, III is the operate as normal post, be wound with primary coil 2 and secondary coil 3 above, primary coil 2 whenever is in series behind 1 or 2 fuse 1, three-phase joins end to end and is connected into triangle, secondary coil 3 is by star-star connection and draw neutral line n, core limb IV is for mending the phase post, be wound with respectively on it and mend phase coil 4, its mode of connection is that output d mended the make contact QK of switching device shifter 6 mutually with fault after two benefit phase coils 4 were connected along polarity
3Link to each other, tail end links to each other with the neutral line n of secondary coil 3.All the other are with embodiment one.
The normal operation of this embodiment is identical with embodiment one.
When single-phase fault takes place in the transformer inside of this embodiment, before its fault is mended 6 actions of phase switching device shifter, the two intact paths that are combined to magnetic flux mend phase core limb IV by two and this fault core limb constitutes three road flux paths, so the induced potential in the fault phase secondary coil 4 will be very low and help fault and mend phase switching device shifter 6 and make change action.After fault was mended 6 actions of phase switching device shifter, the resultant flux of two intact phases was mended phase core limb IV by two faults and is constituted two flux paths, so the induced potential in the benefit phase coil 4 on each fault benefit phase core limb IV also will have only 1/2 of normal value; So in this scheme, mend the suitable polarity series connection of phase coil so that benefit phase electromotive force reaches normal value for two, thereby can satisfy the requirement that fault is mended phase.
When this embodiment generation phase to phase fault or when lacking a phase high voltage source, its work is identical with embodiment one.
By above two examples as seen, adopt technical solutions according to the invention, after the inner generation of transformer one phase fault causes low pressure one phase dead electricity, can reach by the reasonable switching that fault is mended phase switching device shifter 6 and mend the phase purpose, solved the deficiencies in the prior art, can improve effectively the reliability of user's power supply and the fail safe of three-phase power consumption equipment operation.
Claims (3)
1, a kind of fault is mended combined transformer, mainly reach and form around thereon primary coil (2) and secondary coil (3), dielectric and machinery mount etc. by transformer work core limb (I), (II), (III), its primary coil (2) whenever be in series 1 or 2 fuses (1), three-phase joins end to end and is connected into triangle, secondary coil (3) is by star-star connection and draw the neutral line (n), it is characterized in that:
A. having fault mends phase core limb (IV) and mends phase coil (4), fault benefit phase switching device shifter (6) around fault thereon;
B. secondary coil (3) output is mended the break contact (QK of phase switching device shifter (6) through fault
2) link to each other with the power end of low pressure master switch (7), through make contact (QK
1) link to each other with the neutral line (n), fault is mended phase coil (4) output (d) is mended phase switching device shifter (6) through fault make contact (QK
3) link to each other with the power end of low pressure master switch (7);
2, fault according to claim 1 is mended combined transformer, it is characterized in that: fault is mended phase core limb (IV) and is mended phase coil (4) around fault thereon and can be 1 group or 2 groups,
A. when for 1 group, fault is mended the output (d) of phase coil (4) and is mended the make contact (QK of switching device shifter (6) mutually with fault
3) link to each other, tail end links to each other with the neutral line (n) of secondary coil (3);
B. when for 2 groups, after fault was mended the suitable polarity series connection of phase coil (4), output (d) was mended the make contact (QK of switching device shifter (6) mutually with fault
3) link to each other, tail end links to each other with the neutral line (n) of secondary coil (3).
3, fault according to claim 1 and 2 is mended combined transformer, it is characterized in that: described fault is mended phase switching device shifter (6) and is mainly had 2 couples of make contact (QK by 3
1, QK
3) and 1 couple of break contact (QK
2) diverter switch or the noncontacting switch with above-mentioned functions form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03137594 CN1271649C (en) | 2003-06-18 | 2003-06-18 | Fault phase compensation combined transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03137594 CN1271649C (en) | 2003-06-18 | 2003-06-18 | Fault phase compensation combined transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1477656A true CN1477656A (en) | 2004-02-25 |
| CN1271649C CN1271649C (en) | 2006-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03137594 Expired - Fee Related CN1271649C (en) | 2003-06-18 | 2003-06-18 | Fault phase compensation combined transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1271649C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651346B (en) * | 2009-09-23 | 2013-01-02 | 华为技术有限公司 | Multi-phase power supply device and method |
| CN109347344A (en) * | 2018-09-28 | 2019-02-15 | 中国人民解放军空军工程大学 | A kind of fault-tolerant inverter circuit of three level combinations |
-
2003
- 2003-06-18 CN CN 03137594 patent/CN1271649C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651346B (en) * | 2009-09-23 | 2013-01-02 | 华为技术有限公司 | Multi-phase power supply device and method |
| CN109347344A (en) * | 2018-09-28 | 2019-02-15 | 中国人民解放军空军工程大学 | A kind of fault-tolerant inverter circuit of three level combinations |
| CN109347344B (en) * | 2018-09-28 | 2020-12-25 | 中国人民解放军空军工程大学 | Three-level combined fault-tolerant inverter circuit |
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| Publication number | Publication date |
|---|---|
| CN1271649C (en) | 2006-08-23 |
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