CN107134348A - A kind of distribution transformer voltage-regulating system - Google Patents
A kind of distribution transformer voltage-regulating system Download PDFInfo
- Publication number
- CN107134348A CN107134348A CN201710376096.5A CN201710376096A CN107134348A CN 107134348 A CN107134348 A CN 107134348A CN 201710376096 A CN201710376096 A CN 201710376096A CN 107134348 A CN107134348 A CN 107134348A
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- China
- Prior art keywords
- phase windings
- voltage
- windings
- phase
- distribution transformer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- 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
-
- 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
-
- 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
- H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
Abstract
The present invention relates to a kind of distribution transformer voltage-regulating system, belong to electrical equipment technical field.In the system, each tap-changing windings in A phase windings, B phase windings and C phase windings connect main winding after distinguishing series voltage-regulating switch；Current limiting branch road in parallel with respectively there is a tap changer in A phase windings, B phase windings and C phase windings and protection branch road；Tap changer by two reverse parallel connections thyristor groups into；Current limliting branch route the Thyristors in series transition resistance composition of two reverse parallel connections；Protect the resistance to piezoresistance composition of branch route A.C. contactor series connection；Voltage transformer is mounted on a phase windings, b phase windings and c phase windings.The distribution transformer voltage-regulating system that the present invention is provided, become load ratio bridging switch as distribution with the IGCT of reverse parallel connection, during switching branch joint, compared with traditional mechanical shunting switch, IGCT switch speed is faster, transient process is relatively reliable, stably, is conducive to improving quality of voltage.
Description
Technical field
The present invention relates to a kind of distribution transformer voltage-regulating system, belong to electrical equipment technical field.
Background technology
At present, many outskirts of a town, in distribution network line end, are damaged with Rural Power Distribution Network away from power transformation maincenter by circuit
The influence of the factors such as consumption, load variations, there are still low pressure or the underproof problem of voltage.Distribution transformer pressure regulation is stable negative
A kind of important means of lotus center voltage.In voltage pulsation under conditions of idle abundance, pass through switching transformer loaded tap-off
Switch to adjust distribution voltage.But due to 10kV distribution transformers enormous amount and majority not equipped with on-load shunting switch, it is impossible to
Distribution transforming output voltage is automatically adjusted.
The a small amount of load tap changing distribution transformer come into operation at this stage in distribution is also made using mechanical switch substantially
For load ratio bridging switch.Mechanical switch during switching branch joint with electric arc generation, responsiveness is slow, during pressure regulation
Quarter can not accurately control, and fault rate is high.
Disclose a kind of entitled " contactless to be downloaded from moving in Application No. CN201410107456.8 patent of invention file
The technical scheme of the startup of voltage regulating distribution transformer and transition branch road ".The patent is used as distribution transformer using anti-parallel thyristor
The load ratio bridging switch of device, single-chip microcomputer carries out triggering control according to high voltage side of transformer voltage change to IGCT, so as to realize
Voltage-regulation.With the characteristics of reliability is high, transit time is short.But the distribution transformer that the patent is Yy for connection group number
Device, and Yy distribution transformer has the shortcomings that imbalance of three-phase voltage in the case of three-phase load unbalance, at present by
It is phased out, the substitute is Dy type distribution transformers.
The content of the invention
The invention solves the problems that technical problem is：Overcome the shortcoming of above-mentioned technology.A kind of power application electronic switch is provided to make
For the pressure-adjustable distribution transformer system of shunting switch.
In order to solve the above-mentioned technical problem, technical scheme proposed by the present invention is：A kind of distribution transformer voltage-regulating system, institute
A phase windings, B phase windings and the C phase windings that there is triangle to connect for the high-pressure side of distribution transformer are stated, low-pressure side has Y shape company
Connect a phase windings, b phase windings and c phase windings；The A phase windings, B phase windings and C phase windings have main winding respectively, and some
Tap-changing windings；Connected after each tap-changing windings difference series voltage-regulating switch in the A phase windings, B phase windings and C phase windings
The main winding；Current limiting branch road in parallel with respectively there is the tap changer in the A phase windings, B phase windings and C phase windings
With protection branch road；The tap changer by two reverse parallel connections thyristor groups into；The current limliting branch route two reverse parallel connections
Thyristors in series transition resistance composition；The resistance to piezoresistance composition of protection branch route A.C. contactor series connection；The a phases around
Voltage transformer is mounted on group, b phase windings and c phase windings；The output of the voltage transformer is connected with microprocessor；Institute
The output end for stating microprocessor is connected with drive module；The IGCT is driven by the drive module.
Such scheme, which is further improved, to be：Analog-to-digital conversion mould is connected between the voltage transformer and microprocessor
Block.
Such scheme, which is further improved, to be：The microprocessor is also associated with alarm module.
The distribution transformer voltage-regulating system that the present invention is provided, compared with prior art, is made with the IGCT of reverse parallel connection
Become load ratio bridging switch for distribution, IGCT has capacity big, the characteristics of being worked under conditions of high voltage, high current.
During switching branch joint, compared with traditional mechanical shunting switch, faster, transient process is more for IGCT switch speed
Reliably, stably, be conducive to improving quality of voltage；The automatic loaded voltage regulation to distribution transformer can be realized.The present invention is directed to Dy
Type distribution transformer carries out pressure regulation design, can be used widely on existing Dy types distribution transformer.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the electrical block diagram of a preferred embodiment of the embodiment of the present invention.
Embodiment
Embodiment
The distribution transformer voltage-regulating system of the present embodiment, the present embodiment is with ± 1 × 5%UN Dy type distribution transformer taps system
Exemplified by system；Such as Fig. 1, the high-pressure side of distribution transformer has A phase windings, B phase windings and C phase windings that triangle is connected, low pressure
There is Y shape to connect a phase windings, b phase windings and c phase windings for side；A phase windings, B phase windings and C phase windings have main winding respectively
W0 and tap-changing windings W1, W2, W3；Wherein tap-changing windings W1, W2, the rated voltage that W3 is exported respectively be 95%UN, 100%UN,
105%UN；Each tap-changing windings in A phase windings, B phase windings and C phase windings connect main winding after distinguishing series voltage-regulating switch；With A
Respectively there are tap changer current limiting branch road in parallel and protection branch road in phase winding, B phase windings and C phase windings；Tap changer by
The thyristor groups of two reverse parallel connections into；Current limliting branch route the Thyristors in series transition resistance composition of two reverse parallel connections；Protection
The resistance to piezoresistance composition of branch route A.C. contactor series connection；Mutual induction of voltage is mounted on a phase windings, b phase windings and c phase windings
Device；The output of voltage transformer is connected with microprocessor；The output end of microprocessor is connected with drive module；IGCT is by driving
Module drive.
As shown in FIG., tap changer K1.A, K1.B, K1.C is respectively tap of transformer A, B, C three-phase at 95%UN
Switch；Tap changer K2.A, K2.B, K2.C are respectively shunting switch of A, B, C three-phase at 100%UN；Tap changer K4.A,
K4.B, K4.C are respectively shunting switch of A, B, C three-phase at 105%UN.
During pressure regulation, Transformer Winding constitutes closed-loop path with IGCT, can produce very big dash current, be
IGCT is avoided to damage, tap changer that the tap-changing windings W2 in A phase windings, B phase windings and C phase windings is connected, namely
It is tap changer K2.A, K2.B, K2.C current limiting branch road in parallel respectively.Current limliting branch route the Thyristors in series of two reverse parallel connections
Transition resistance is constituted.As shown in FIG., the IGCT K3.A and transition resistance RG.A of reverse parallel connection are composed in series current limliting branch road, and
It is associated in tap changer K2.A two ends；IGCT K3.B and transition resistance RG.B the composition current limliting branch road of reverse parallel connection, are connected in parallel on tune
Compress switch K2.B two ends；The IGCT K3.C and transition resistance RG.C of reverse parallel connection are composed in series current limliting branch road, are connected in parallel on pressure regulation
Switch K2.C two ends.
Before Transformer Close, IGCT is not turned on, and is in off state.To avoid voltage during Transformer Close from damaging
The tap changer that tap-changing windings W2 in bad IGCT, A phase windings, B phase windings and C phase windings is connected, that is to say that pressure regulation is opened
Close K2.A, K2.B, K2.C and be also parallel with protection branch road respectively；Protect the resistance to piezoresistance composition of branch route A.C. contactor series connection.Hand over
The protection branch road for the Startup time that the stream contactor KM.A and R0.A of resistance to piezoresistance is composed in series, is connected in parallel on tap changer K2.A two
End；The protection branch road for the Startup time that the A.C. contactor KM.B and R0.B of resistance to piezoresistance is composed in series, is connected in parallel on tap changer
K2.B two ends；The protection branch road for the Startup time that the A.C. contactor KM.C and R0.C of resistance to piezoresistance is composed in series, is connected in parallel on pressure regulation
Switch K2.C two ends.
Voltage transformer is mounted on a phase windings, b phase windings and c phase windings；The output of voltage transformer is connected with micro-
Processor；The output end of microprocessor is connected with drive module；IGCT is driven by drive module.In the present embodiment, microprocessor
Device that is to say single-chip microcomputer.
If not having the microprocessor of A/D translation functions using some, between voltage transformer and microprocessor
Analog-to-digital conversion module is set.Microprocessor is also associated with alarm module.
When transformer prepares to close a floodgate, A.C. contactor KM.A, KM.B and KM.C are closed first.After closure, transformer is closed
Lock.Now, the voltage of high voltage side of transformer is all applied on the R0.A of resistance to piezoresistance, R0.B and R0.C, so as to avoid high straightening
Connect and be applied on IGCT, protect IGCT.Now step down side is powered, to each phase W2 tap changers connected
IGCT sends control signal, triggers turn on thyristors, that is to say that tap changer K2.A, K2.B, K2.C are turned on；Then, disconnect
A.C. contactor KM.A, KM.B and KM.C, disconnect protection branch road.At now turn on thyristors, A.C. contactor shut-off, transformer
In normal operating condition, start-up course is completed.
Specific automatic loaded voltage regulation process, so that now low-pressure side voltage is too high, it is necessary to turn down voltage as an example.If now adjusting
Compress switch K2.A, K2.B and K3.C conducting, then need conducting connection high voltage gear tap changer K1.A, K1.B and
K1.C.During shunting switch is switched, switch K3.A, K3.B and K3.C of current limliting branch road are triggered first；Delayed at one section
Treat that K3.A, K3.B and K3.C are turned on, stop triggering K2.A, K2.B and K3.C；Delayed during another section triggering K1.A, K1.B and
K1.3；After one section of time delay after after K1.A, K1.B and K1.C conducting, stop triggering K3.A, K3.B and K3.C.Now only have
K1.A, K1.B and K1.C are in the conduction state, so as to complete transient process.
The monitoring system of distribution transformer automatic loaded voltage regulation system is connected to the low-pressure side of transformer.To realize the work(of pressure regulation
Energy, it is necessary to monitor, and the electronic power switch of each phase in high-pressure side is entered respectively in real time to each phase voltage of step down side
Row control.Voltage transformer two ends are connected between each phase of step down side and the neutral conductor respectively, pass through voltage transformer
The phase voltage of each phase of low-pressure side is gathered, and each phase voltage signal is passed into single-chip microcomputer using analog-to-digital conversion module.Monolithic
The voltage swing collected is compared by machine with normal voltage range set in advance, according to comparative result judge this moment whether
Need pressure regulation.
Voltage regulating mode is voltage regulating mode step by step；When monitoring low-pressure side voltage U2<During 95%UN, the tune of higher gear is controlled
Compress switch conducting；If now voltage U2 is still below 95%UN, continue to control the tap changer conducting of higher gear.If now
The tap changer of highest gear has been turned on, it is impossible to continue to heighten voltage, and voltage does not recover to normal voltage yet, then sends report
Alert signal.When monitoring low-pressure side voltage U2a>During 105%UN, the tap changer compared with low-grade location is controlled to turn on；If now voltage U2
105%UN is remained above, then continues to control the tap changer compared with low-grade location to turn on.If now the tap changer of lowest gear is
Conducting, it is impossible to continue to turn down voltage, and voltage does not recover to normal voltage yet, then sends alarm signal.
The present invention is not limited to the concrete technical scheme of above-described embodiment, in addition to the implementation, and the present invention can also have
Other embodiment.The technical scheme of all use equivalent substitution formation, is the protection domain of application claims.
Claims (3)
1. a kind of distribution transformer voltage-regulating system, the high-pressure side of the distribution transformer has A phase windings, B that triangle is connected
There is phase winding and C phase windings, low-pressure side Y shape to connect a phase windings, b phase windings and c phase windings；The A phase windings, B phase windings
There are main winding and some tap-changing windings respectively with C phase windings；It is characterized in that：The A phase windings, B phase windings and C phase windings
In each tap-changing windings distinguish series voltage-regulating switch after connect the main winding；With the A phase windings, B phase windings and C phases
Respectively there are tap changer current limiting branch road in parallel and protection branch road in winding；The tap changer is by two reverse parallel connections
Thyristor groups into；The current limliting branch route the Thyristors in series transition resistance composition of two reverse parallel connections；The protection branch road
It is made up of A.C. contactor resistance to piezoresistance of connecting；Mutual induction of voltage is mounted on a phase windings, b phase windings and c phase windings
Device；The output of the voltage transformer is connected with microprocessor；The output end of the microprocessor is connected with drive module；It is described
IGCT is driven by the drive module.
2. distribution transformer voltage-regulating system according to claim 1, it is characterised in that：The voltage transformer and microprocessor
Analog-to-digital conversion module is connected between device.
3. distribution transformer voltage-regulating system according to claim 1, it is characterised in that：The microprocessor is also associated with report
Alert module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710376096.5A CN107134348A (en) | 2017-05-25 | 2017-05-25 | A kind of distribution transformer voltage-regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710376096.5A CN107134348A (en) | 2017-05-25 | 2017-05-25 | A kind of distribution transformer voltage-regulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107134348A true CN107134348A (en) | 2017-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710376096.5A Pending CN107134348A (en) | 2017-05-25 | 2017-05-25 | A kind of distribution transformer voltage-regulating system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258696A (en) * | 2017-12-20 | 2018-07-06 | 国网内蒙古东部电力有限公司 | On-load voltage regulating device and its processing method, storage medium, processor |
| CN110164726A (en) * | 2019-05-24 | 2019-08-23 | 国网河北省电力有限公司沧州供电分公司 | A kind of voltage regulating distribution transformer |
| CN111969611A (en) * | 2020-08-07 | 2020-11-20 | 合肥众甫工业技术有限公司 | Transformer on-load automatic voltage regulation driving and controlling system |
| CN115940672A (en) * | 2023-03-14 | 2023-04-07 | 成都英格利科技有限公司 | Electrolytic hydrogen production rectifier with rapid voltage regulation capability and control method thereof |
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| WO1998048432A1 (en) * | 1997-04-22 | 1998-10-29 | Elin Oltc Stufenschalter Für Transformatoren Gmbh | Circuit arrangement for a load transfer switch |
| CN103296903A (en) * | 2013-05-29 | 2013-09-11 | 西安建筑科技大学 | Direct-current silicon commutating power supply |
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| CN103759528A (en) * | 2013-12-26 | 2014-04-30 | 孙崇山 | Novel energy-saving steady-constant current power regulating (electrode-fluctuation-free) system of alternating current electrical arc furnace |
| CN106100356A (en) * | 2016-08-18 | 2016-11-09 | 国网江苏省电力公司南京供电公司 | A kind of distribution transformer on-load voltage regulation system based on reverse parallel connection IGCT |
| CN106373764A (en) * | 2016-10-26 | 2017-02-01 | 国网江苏省电力公司南京供电公司 | On-load capacitance and voltage regulation system of power distribution transformer |
| RU2613679C2 (en) * | 2015-08-19 | 2017-03-21 | Борис Алексеевич Аржанников | Device for regulating voltage and method for its control |
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| WO1998048432A1 (en) * | 1997-04-22 | 1998-10-29 | Elin Oltc Stufenschalter Für Transformatoren Gmbh | Circuit arrangement for a load transfer switch |
| CN103296903A (en) * | 2013-05-29 | 2013-09-11 | 西安建筑科技大学 | Direct-current silicon commutating power supply |
| CN103762598A (en) * | 2013-12-26 | 2014-04-30 | 孙崇山 | High-power power compensation voltage-stabilization capacity-adjustment alternating current power source with stepless-voltage-adjustment arc extinction switch |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258696A (en) * | 2017-12-20 | 2018-07-06 | 国网内蒙古东部电力有限公司 | On-load voltage regulating device and its processing method, storage medium, processor |
| CN110164726A (en) * | 2019-05-24 | 2019-08-23 | 国网河北省电力有限公司沧州供电分公司 | A kind of voltage regulating distribution transformer |
| CN111969611A (en) * | 2020-08-07 | 2020-11-20 | 合肥众甫工业技术有限公司 | Transformer on-load automatic voltage regulation driving and controlling system |
| CN115940672A (en) * | 2023-03-14 | 2023-04-07 | 成都英格利科技有限公司 | Electrolytic hydrogen production rectifier with rapid voltage regulation capability and control method thereof |
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Application publication date: 20170905 |