CN206878464U - A kind of distribution transformer split-phase voltage-regulating system - Google Patents
A kind of distribution transformer split-phase voltage-regulating system Download PDFInfo
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- CN206878464U CN206878464U CN201720588209.3U CN201720588209U CN206878464U CN 206878464 U CN206878464 U CN 206878464U CN 201720588209 U CN201720588209 U CN 201720588209U CN 206878464 U CN206878464 U CN 206878464U
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- 238000004804 winding Methods 0.000 claims abstract description 56
- 230000007704 transition Effects 0.000 claims abstract description 6
- 230000007935 neutral effect Effects 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 7
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 206010034133 Pathogen resistance Diseases 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
A kind of distribution transformer split-phase voltage-regulating system is the utility model is related to, belongs to electrical equipment technical field.In the system, the on high-tension side neutral point of distribution transformer is connected after tap difference series voltage-regulating switch；Respectively there are the tap changer parallel connection current limiting branch road and protection branch road that a tap is connected in A phase windings, B phase windings and C phase windings；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 output of voltage transformer is connected with microprocessor；The output end of microprocessor is connected with drive module；IGCT is driven by drive module.Distribution transformer split-phase voltage-regulating system provided by the utility model, the capacity and voltage of distribution transformer can be adjusted automatically and rapidly.In handoff procedure, Current Voltage fluctuation is stable, and the sensitive users in power network and distribution will not be had an impact.
Description
Technical field
A kind of distribution transformer split-phase voltage-regulating system is the utility model is related to, belongs to electrical equipment technical field.
Background technology
At present, there are still voltage stability difference or the underproof problem of voltage with Rural Power Distribution Network in many outskirts of a town.Meanwhile
Outskirts of a town cause three-phase load in power distribution network uneven with a large amount of single-phase loads, the skewness of single-phase load in Rural Power Distribution Network be present
Weighing apparatus, so that the imbalance of three-phase voltage of transformer output.The voltage regulating mode of existing distribution transformer be three-phase simultaneously
It pressure regulation, can not be resolved the problem of such voltage three-phase imbalance, and original certain qualified phase voltage may also be adjusted
It is extremely unqualified.
The content of the invention
The utility model will solve technical problem：The shortcomings that overcoming above-mentioned technology.A kind of power application electronic cutting is provided
Close the distribution transformer system of the split-phase pressure regulation as shunting switch.
In order to solve the above-mentioned technical problem, the utility model proposes technical scheme be：A kind of distribution transformer split-phase is adjusted
Pressure system, A phase windings, B phase windings and C phase windings, the low-pressure side that there is Y shape to connect for the high-pressure side of the distribution transformer have
Y shape connection a phase windings, b phase windings and c phase windings；The A phase windings, B phase windings and C phase windings have connection different respectively
Some taps of the number of turn；The on high-tension side neutral point that the distribution transformer is connected after series voltage-regulating switchs is distinguished in the tap；
Respectively there are the tap changer parallel connection current limiting branch road and guarantor that a tap is connected in the A phase windings, B phase windings and C phase windings
Protect branch road；The tap changer by two reverse parallel connections thyristor groups into；The current limliting branch route the crystalline substance of two reverse parallel connections
Brake tube series connection transition resistance composition；The resistance to piezoresistance composition of protection branch route A.C. contactor series connection；The a phase windings, b phases
Voltage transformer is mounted on winding and c phase windings；The output of the voltage transformer is connected with microprocessor；Micro- place
The output end of reason device is connected with drive module；The IGCT is driven by the drive module.
Such scheme, which further improves, to be：Analog-to-digital conversion mould is connected between the voltage transformer and microprocessor
Block.
Such scheme, which further improves, to be：The microprocessor is also associated with alarm module.
Distribution transformer split-phase voltage-regulating system provided by the utility model, compared with prior art, using reverse parallel connection
IGCT as distribution transformer capacity and pressure regulating switch, the capacity and voltage of distribution transformer can be adjusted automatically and rapidly.
In handoff procedure, Current Voltage fluctuation is stable, and the sensitive users in power network and distribution will not be had an impact.
Brief description of the drawings
The utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the electrical block diagram of a preferred embodiment of the utility model embodiment.
Embodiment
Embodiment
The distribution transformer split-phase voltage-regulating system of the present embodiment, such as Fig. 1, the high-pressure side of distribution transformer have Y shape connection
A phase windings, B phase windings and C phase windings, low-pressure side has a phase windings, b phase windings and c phase windings.
The present embodiment by taking ± 1 × 5%UN Yyn0 distribution transformer tap systems as an example, A phase windings, B phase windings and C phases around
Group has the tap that rated voltage is respectively 95%UN, 100%UN, 105%UN respectively；Tap connects after distinguishing series voltage-regulating switch
The on high-tension side neutral point of distribution transformer；Tap changer by two reverse parallel connections thyristor groups into.As shown in FIG., pressure regulation
It is respectively shunting switch of transformer A, B, C three-phase at 105%UN to switch K1.A, K1.B, K1.C；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 be respectively A, B,
Shunting switch of the C three-phases at 95%UN.
During pressure regulation, Transformer Winding forms closed-loop path with IGCT, can produce very big dash current, be
Avoid IGCT from damaging, the tap changer that 100%UN taps are connected in A phase windings, B phase windings and C phase windings, that is to say
Tap changer K2.A, K2.B, K2.C distinguish current limiting branch road in parallel.Current limliting branch route the Thyristors in series mistake of two reverse parallel connections
Cross resistance composition.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, in parallel
At tap changer K2.A both ends；IGCT K3.B and transition resistance RG.B the composition current limliting branch road of reverse parallel connection, are connected in parallel on pressure regulation
Switch K2.B both 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 and open
Close K2.C both ends.
Before Transformer Close, IGCT does not turn on, and is in off state.Voltage damage during to avoid Transformer Close
Bad IGCT, the tap changer that 100%UN taps are connected in A phase windings, B phase windings and C phase windings, that is to say tap changer
K2.A, K2.B, K2.C are also parallel with protection branch road respectively；Protect the resistance to piezoresistance composition of branch route A.C. contactor series connection.Exchange
The protection branch road for the Startup time that the contactor KM.A and R0.A of resistance to piezoresistance is composed in series, is connected in parallel on tap changer K2.A both ends；
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
End；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 tap changer
K2.C both 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 do not have 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 closes
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 the IGCT at each phase 100%UN taps
Control signal is sent, triggers turn on thyristors, that is to say that tap changer K2.A, K2.B, K2.C are turned on；Then, exchange is disconnected to connect
Tentaculum KM.A, KM.B and KM.C, disconnect protection branch road.Now turn on thyristors, A.C. contactor shut-off, transformer are in normal
Running status, complete start-up course.
Specific have a split-phase pressure regulation process that carries automatically, it is too low using now low-pressure side a phase voltages, it is necessary to heighten a phase voltages as
Example.If now tap changer K2.A is turned on, the tap changer K1.A of conducting connection high voltage gear is needed.Tapped in switching
During switch, the switch K3.A of current limliting branch road is triggered first；Delayed at one section and treat that K3.A is turned on, stop triggering K2.A；One
Triggering K1.A is delayed during section；After one section of time delay after K1.A conductings, stop triggering K3.A.Now only have K1.A to be on shape
State, so as to complete transient process.
Distribution transformer has the low-pressure side that the monitoring system for carrying split-phase voltage-regulating system is connected to transformer automatically.To realize split-phase
The function of pressure regulation, it is necessary to monitor in real time to each phase voltage of step down side, and respectively to the electric power electricity of each phase in high-pressure side
Sub switch is controlled.Voltage transformer both ends are connected between each phase of step down side and the neutral conductor respectively, pass through electricity
The phase voltage of the transformer collection each phase of low-pressure side is pressed, and each phase voltage signal is passed into monolithic using analog-to-digital conversion module
Machine.Single-chip microcomputer compared with normal voltage range set in advance, judges the voltage swing collected according to comparative result
Whether need pressure regulation this moment.
Voltage regulating mode is voltage regulating mode step by step.Exemplified by adjusting low-pressure side a phase voltages, when monitoring low-pressure side a phase voltages
U2a<During 95%UN, the tap changer of higher gear is controlled to turn on；If now voltage U2a is still below 95%UN, continue control compared with
The tap changer conducting of high tap position.If now the tap changer of highest gear has been turned on, can not continue to heighten voltage, and it is electric
Pressure is not recovered to normal voltage yet, then sends alarm signal.When monitoring low-pressure side a phase voltages U2a>During 105%UN, control compared with
The tap changer conducting of low-grade location；If now voltage U2a remains above 105%UN, the tap changer for continuing control compared with low-grade location is led
It is logical.If now the tap changer of lowest gear has been turned on, can not continue to turn down voltage, and voltage does not recover to normal electricity yet
Pressure, then send alarm signal.Remaining b, c two-phase can carry out Regulation Control according to method set forth above.
In the prior art, it may have can be with capacity transfer and the system of three-phase pressure regulation simultaneously.Because capacity transfer becomes in such system
There are two capacity of different sizes in depressor, correspond to two kinds of different methods of operation.It is judged by low-pressure side electric current I2
Whether transformer load overloads or intimate no-load running, and I2 size determines should adjust transformer under for which kind of method of operation
Operation.When transformer is being run in the case of low capacity, if I2>Izd and t2a>Tzda, triggering capacitance switch cause transformer
Run in Large Copacity.Wherein t2a is electric current I2 durations, and tzda is the setting valve of the time of capacity transfer, and Izd becomes for distribution
The current setting of depressor capacity transfer.When transformer is being run in the case of Large Copacity, if I2<Izd and t2a>Tzda, stop
Triggering capacitance switch causes transformer to be run in low capacity.Principle due to tuning up capacity is by winding parallel, so when change
When depressor is run at high volume, inside transformer impedance diminishes when can be run compared with low capacity, and the current value that low pressure is surveyed also can be compared with
Low capacity somewhat becomes big when running.Exemplified by tuning up capacity, if now transformer low capacity is run, 0<I2-Izd=ε, wherein ε>
0, when tuning up capacity as requested, I2-Izd difference ε can somewhat increase, and can avoid shaking to a certain extent.
If carrying out split-phase pressure regulation with the system, it may result in low-pressure side load and the state of three-phase imbalance occur, then
Capacity transfer is also required to judge whether to need to carry out capacity transfer according to the electric current of each phase, it is possible to which it is excessive the load of a phases occur, electric current
It is too low, a phases are only subjected to increase-volume, and b, c two-phase are without the phenomenon of increase-volume.It may result in the serious injustice of the winding of three-phase
Weighing apparatus, considerable influence is caused to the normal operation of transformer.
The utility model is not limited to the concrete technical scheme of above-described embodiment, in addition to the implementation, the utility model
There can also be other embodiment.All technical schemes formed using equivalent substitution, it is the protection model of the requires of the utility model
Enclose.
Claims (3)
1. a kind of distribution transformer split-phase voltage-regulating system, the high-pressure side of the distribution transformer has A phase windings, B that Y shape connects
Phase winding and C phase windings, low-pressure side have Y shape connection a phase windings, b phase windings and c phase windings；The A phase windings, B phase windings
There are some taps of the different numbers of turn of connection respectively with C phase windings；It is characterized in that：After the tap difference series voltage-regulating switch
Connect the on high-tension side neutral point of the distribution transformer；Respectively there is a tap in the A phase windings, B phase windings and C phase windings
The tap changer parallel connection current limiting branch road and protection branch road connected；The tap changer 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 route ac contactor
The resistance to piezoresistance composition of device series connection；Voltage transformer is mounted on a phase windings, b phase windings and c phase windings；The voltage
The output of transformer is connected with microprocessor；The output end of the microprocessor is connected with drive module；The IGCT is by institute
State drive module driving.
2. distribution transformer split-phase voltage-regulating system according to claim 1, it is characterised in that：The voltage transformer with it is micro-
Analog-to-digital conversion module is connected between processor.
3. distribution transformer split-phase voltage-regulating system according to claim 1, it is characterised in that：The microprocessor is also connected with
There is alarm module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720588209.3U CN206878464U (en) | 2017-05-25 | 2017-05-25 | A kind of distribution transformer split-phase voltage-regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720588209.3U CN206878464U (en) | 2017-05-25 | 2017-05-25 | A kind of distribution transformer split-phase voltage-regulating system |
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| Publication Number | Publication Date |
|---|---|
| CN206878464U true CN206878464U (en) | 2018-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720588209.3U Active CN206878464U (en) | 2017-05-25 | 2017-05-25 | A kind of distribution transformer split-phase voltage-regulating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171330A (en) * | 2017-05-25 | 2017-09-15 | 国网江苏省电力公司南京供电公司 | A kind of distribution transformer split-phase voltage-regulating 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 |
-
2017
- 2017-05-25 CN CN201720588209.3U patent/CN206878464U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171330A (en) * | 2017-05-25 | 2017-09-15 | 国网江苏省电力公司南京供电公司 | A kind of distribution transformer split-phase voltage-regulating 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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