CN106330032B - A kind of Multi-stage on-load automatic voltage-regulating distribution transformer - Google Patents
A kind of Multi-stage on-load automatic voltage-regulating distribution transformer Download PDFInfo
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- CN106330032B CN106330032B CN201610847653.2A CN201610847653A CN106330032B CN 106330032 B CN106330032 B CN 106330032B CN 201610847653 A CN201610847653 A CN 201610847653A CN 106330032 B CN106330032 B CN 106330032B
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- 238000009826 distribution Methods 0.000 title claims abstract description 34
- 238000004804 winding Methods 0.000 claims abstract description 128
- 238000000034 method Methods 0.000 abstract description 27
- 230000008569 process Effects 0.000 abstract description 22
- 230000001131 transforming effect Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 16
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 2
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- 238000012544 monitoring process Methods 0.000 description 2
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- 238000012271 agricultural production Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
- H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
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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
- H01F27/40—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
- 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
- H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention relates to a kind of Multi-stage on-load automatic voltage-regulating distribution transformers, belong to power transmission and transforming equipment Automatic Regulation Control technical field.The Multi-stage on-load automatic voltage-regulating distribution transformer; including distribution transformer, tap-changing windings module and control module; tap-changing windings module includes groundwork winding W0, the tap-changing windings circuit being serially connected with after groundwork winding W0 and the current-limiting protection circuit A with tap-changing windings circuit in parallel; multiple controlled switch are equipped between each each tie point for adjusting winding point, control module changes the disconnection of control controlled switch according to low-pressure side voltage and/or is closed to adjust low-pressure side voltage.The present invention is connected by controlling groundwork winding with the Same Name of Ends of tap-changing windings with different name end, so that required tap number halves, reduce tap switch number, cost and technology difficulty are reduced, load ratio bridging switch is in the service life and reliability that voltage transforming gear process is all that not charged switching increases distribution transformer.
Description
Technical field
The present invention relates to a kind of Multi-stage on-load automatic voltage-regulating distribution transformers, belong to power transmission and transforming equipment Automatic Regulation Control skill
Art field.
Background technique
In recent years, with the raising of the development of social economy and living standards of the people, power consumer to power quality and
More stringent requirements are proposed for power supply reliability.Meanwhile the rapid development of information-intensive society also proposes new challenge to power supply quality.
Voltage is one of the most important index for measuring power quality, and voltage fluctuation directly affects agricultural production and the people
The normal operation of life.And among this, what is played a crucial role is exactly distribution transformer.Its performance determines this power supply quality.Such as
The present mostly or uses non-excitation pressure adjustment, and construction of switch is simply easily made, and transformer device structure is simple compared with on-load voltage regulation, but its tune
Press range smaller, generally 10% or so, this mode needs manual operation, and needs to cut off the power, just adjustable.And
Restore normal power supply again from being cut to, the time is longer (several minutes to dozens of minutes), can bring very huge economic loss, also can
Influence the normal life of people.Particularly, to some rural remote areas, voltage fluctuation is likely to be breached 10% or more, no Excitation Adjustment
Pressure cannot be applicable in.And on-load voltage regulation energy bringing onto load pressure regulation, pressure regulation speed are fast, every exchange voltage order one about 3~6s, switch can hand
Dynamic, electric operating, also can distant place electric operating, be easy to implement automatic management, range of regulation is larger, generally 10% or more.Cause
This, it is higher and higher to the load tapchanging demand of distribution transformer, cause the attention of associate power department.For example, a China
Patent of invention (application No. is 201410847167.1, the applying date is on December 31st, 2014, and publication date is 29 days 2015.4 months)
A kind of " contactless on-load automatic regulating distribution transformer and the method for carrying out automatic Regulation " is disclosed, this method, which can be realized, matches
Piezoelectric transformer loaded automatic voltage-regulating, and voltage is obtained from high-pressure side tap winding, it powers, keeps away to single-chip microcontroller through voltage transformer
Special start-up circuit is exempted from.But there is also following deficiencies for this scheme: firstly, pressure regulation series is limited using this scheme,
To increase pressure regulation series, then it to be set as tap corresponding with pressure regulation series, design circuit can be made increasingly complex；In addition,
Every phase winding transition branch in the patent only has one, different voltages transforming gear all needs to realize by this transition branch,
Switch frequently cuts off or is closed the service life that can reduce switch, reduces the reliability that distribution transformer uses.
Summary of the invention
The technical problem to be solved by the present invention is in view of the shortcomings of the prior art, propose that a kind of Multi-stage on-load automatic voltage-regulating is matched
Piezoelectric transformer.
In order to solve the above-mentioned technical problem technical solution that the present invention proposes is: a kind of Multi-stage on-load automatic voltage-regulating distribution change
Depressor, including distribution transformer, tap-changing windings module and control module,
The pressure regulation that the tap-changing windings module includes groundwork winding W0, is serially connected with after the groundwork winding W0
Winding circuit and current-limiting protection circuit A with the tap-changing windings circuit in parallel, the tap-changing windings circuit include that sequence is gone here and there
The adjusting winding W1 of connection, winding W2 is adjusted, winding W3 is adjusted, adjusts winding W4, be equipped between each tie point for adjusting winding
Multiple controlled switch, the tap-changing windings circuit further include current-limiting protection circuit B and current-limiting protection circuit C, the current-limiting protection
Circuit be serially connected with adjust winding W1 and/or adjust winding W3 after, the current-limiting protection circuit C be serially connected with adjust winding W2 and/
Or after adjusting winding W4；
The control module includes being used to monitor the PLC control system of low-pressure side voltage positioned at distribution transformer output side winding
System, the opening and/or closure that the PLC control system controls controlled switch according to the voltage transformation of distribution transformer are to adjust
State distribution transformer low-pressure side voltage.
The improvement of above-mentioned technical proposal is: the controlled switch is A.C. contactor, the normally-closed contact of A.C. contactor one
One end is connected to the tie point for adjusting winding W1 and adjusting winding W2, and one end of the normally opened contact of A.C. contactor one is connected to tune
It saves winding W3 and adjusts the tie point of winding W4, the other end of the normally-closed contact of A.C. contactor one is normal with A.C. contactor one
The other end for opening contact is connected to same tie point and concatenates current-limiting protection circuit B after the tie point；
Normally-closed contact one end of A.C. contactor two is connected to the tie point for adjusting winding W2 and adjusting winding W3, and exchange connects
One end of the normally opened contact of tentaculum two is serially connected with after adjusting winding W4, the other end of the normally-closed contact of A.C. contactor two and friendship
The other end for flowing the normally opened contact of contactor two is connected to same tie point, the normally-closed contact of the tie point and A.C. contactor four
One end connection；
One end of the normally-closed contact of A.C. contactor three is connected with the one end for the normally opened contact for exchanging basic device three, and concatenates
After groundwork winding W0, the other end concatenation of the normally-closed contact of A.C. contactor three adjusts winding W1, A.C. contactor
The other end of three normally opened contact is connected to the tie point for adjusting winding W4 and two normally opened contact of A.C. contactor；
One end of the normally opened contact of A.C. contactor four is connected to the normally-closed contact of A.C. contactor three and adjusts winding W1
Tie point, the other end of the normally opened contact of A.C. contactor four connect simultaneously with the other end of the normally-closed contact of A.C. contactor four
In the current-limiting protection circuit C that connects later.
The improvement of above-mentioned technical proposal is: the current-limiting protection circuit A is that the first anti-parallel thyristor concatenation is parallel with one another
The second anti-parallel thyristor and current-limiting resistance R3 of connection；The current-limiting protection circuit B is that current-limiting resistance R1 connects third instead simultaneously
It is in parallel with the 4th anti-parallel thyristor again after connection thyristor；The current-limiting protection circuit C is that current-limiting resistance R2 series connection the 5th is anti-simultaneously
It is in parallel with the 6th anti-parallel thyristor again after connection thyristor.
The improvement of above-mentioned technical proposal is: the groundwork winding W0, the adjusting winding W1, the adjusting winding
W2, the coil ratio for adjusting winding W3, adjusting winding W4 are 100:2.5:2.5:2.5:2.5.
The improvement of above-mentioned technical proposal is: the PLC control system acquires the low-pressure side C phase of the distribution transformer in real time
Voltage is compared with given threshold, according to the result of the comparison to the normally-closed contact of each anti-parallel thyristor and each A.C. contactor
And/or normally opened contact is controlled.
The beneficial effect of the present invention by adopting the above technical scheme is: for a wide range of, such as 9 grades of pressure regulation, it usually needs
Each high-voltage winding extracts 9 taps, the invisible complexity for increasing technique of meeting out, and cost also will increase many；The present invention passes through control
Groundwork winding processed is connected with the Same Name of Ends of tap-changing windings with different name end, so that tap number halves, reduces tap switch
Number, reduces cost and technology difficulty.And on the one hand introduce 2 transition branches, on the other hand pressure regulation method of the invention be according to
It is designed according to on-load mechanical voltage-regulation principle, A.C. contactor is to increase distribution without electrically operated in switch operating process
The service life and reliability of transformer.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings.
Fig. 1 is principle of the invention wiring diagram.
Fig. 2 is that the present invention starts to holding process flow diagram flow chart.
Fig. 3 is pressure reduction flow chart of the present invention.
Fig. 4 is boost process flow chart of the present invention.
Specific embodiment
Embodiment
A kind of Multi-stage on-load automatic voltage-regulating distribution transformer of the present embodiment, shown in Fig. 1, including distribution transformer, pressure regulation
Winding module and control module, for the high-voltage winding of distribution transformer ontology there are 4 taps, tap-changing windings module includes basic
Working winding W0, the tap-changing windings circuit being serially connected with after groundwork winding W0 and the current limliting with tap-changing windings circuit in parallel
Circuit A is protected, tap-changing windings circuit includes the adjusting winding W1 of sequential series, adjusts winding W2, adjust winding W3, adjust winding
W4 is equipped with multiple A.C. contactors as load ratio bridging switch, tap-changing windings circuit between each tie point for adjusting winding
It further include current-limiting protection circuit B and current-limiting protection circuit C, current-limiting protection circuit, which is serially connected with, adjusts winding W1 and/or adjusting winding
After W3, current-limiting protection circuit C is serially connected with after adjusting winding W2 and/or adjusting winding W4；Control module includes being located at distribution
Transformer output side winding is used to monitor the PLC control system of outlet side voltage, and PLC control system is according to the low of distribution transformer
Press side voltage change control as the anti-parallel thyristor of load ratio bridging switch and the opening of A.C. contactor and/or be closed with
Adjust distribution transformer low-pressure side voltage.
One end normally-closed contact KM1 of the A.C. contactor one of the present embodiment, which is connected to, to be adjusted winding W1 and adjusts winding W2's
Tie point, one end of the normally opened contact-KM1 of A.C. contactor one are connected to the tie point for adjusting winding W3 and adjusting winding W4,
The other end of the normally opened contact-KM1 of the other end and A.C. contactor one of the normally-closed contact KM1 of A.C. contactor one is connected to together
One tie point simultaneously concatenates current-limiting protection circuit B after the tie point；
One end normally-closed contact KM2 of A.C. contactor two is connected to the tie point for adjusting winding W2 and adjusting winding W3, hands over
The one end for flowing the normally opened contact-KM2 of contactor two is serially connected with after adjusting winding W4, the normally-closed contact KM2 of A.C. contactor two
The other end and the other end of normally opened contact-KM2 of A.C. contactor two be connected to same tie point, which connects with exchanging
One end normally-closed contact KM4 of tentaculum four connects；
One end phase of one end of the normally-closed contact KM3 of A.C. contactor three and the normally opened contact-KM3 for exchanging basic device three
Even, it and is serially connected with after groundwork winding W0, the other end concatenation of the normally-closed contact KM3 of A.C. contactor three adjusts winding
W1, the other end of the normally opened contact-KM3 of A.C. contactor three, which is connected to, adjusts winding W4 and two normally opened contact of A.C. contactor-
The tie point of KM2；
One end of the normally opened contact-KM4 of A.C. contactor four is connected to the normally-closed contact KM3 of A.C. contactor three and adjusts
The tie point of winding W1, the other end of the normally opened contact-KM4 of A.C. contactor four and the normally-closed contact KM4 of A.C. contactor four
The other end connection and later connect current-limiting protection circuit C.
The current-limiting protection circuit A of the present embodiment is that the first anti-parallel thyristor VS1 concatenates second be connected in parallel with each other instead
Parallel thyristors VS2 and current-limiting resistance R3；After current-limiting protection circuit B is current-limiting resistance R1 series connection third anti-parallel thyristor VS4
It is in parallel with the 4th anti-parallel thyristor VS3 again；Current-limiting protection circuit C is the 5th anti-parallel thyristor VS6 of current-limiting resistance R2 series connection
It is in parallel with the 6th anti-parallel thyristor VS5 again afterwards.
The groundwork winding W0 of the present embodiment, winding W1 is adjusted, winding W2 is adjusted, adjusts winding W3, adjusts winding W4
Coil ratio be 100:2.5:2.5:2.5:2.5.
The PLC control system of the present embodiment acquires the low-pressure side C phase voltage of distribution transformer compared with given threshold in real time,
According to the result of the comparison to the normally-closed contact KM and/or normally opened contact-KM of each anti-parallel thyristor and each A.C. contactor into
Row control.
As shown in Fig. 2, the present embodiment is fluctuated according to distribution transformer low-pressure side C phase voltage to control opening for each switch
It closes, guarantees that its voltage fluctuation is no more than voltage rating UN± 3%, after transformer initial power-on, actuating mechanism makes Circuit Fault on Secondary Transformer
There are voltage output, the work of PLC monitoring system, bidirectional thyristor VS1 closure is delayed by 1S, is closed VS2, and current-limiting resistance R3 is cut
It removes, state is 0 at this time, and transformer is operated normally in voltage rating UN, monitoring system enters automatic control program.
If secondary side voltage UC(C phase voltage) is in 97%~103%UNBetween fluctuate, then carry out pressure reduction, as shown in figure 3,
By taking A phase as an example,
(1) if Circuit Fault on Secondary Transformer output voltage UC>103%UN, primary side should increase umber of turn, from 0 transition of gear
To gear -1 (W1 adjust winding access), conversion process: VS1 and VS2 closure (original state) → disconnect VS2 → closure VS4 →
VS1 is disconnected, is closed VS3 → disconnection VS4, in 102.5%, conversion process terminates for transformer stable operation.
(2) if the adjusting of an above-mentioned tap switch terminates, output voltage UC>103%UN, primary side should continue growing winding
The number of turns, gear -1 are transitioned into gear -2(W1, W2 and adjust winding access), conversion process: VS3 is closed (original state) → closure
VS6 → closure VS5 disconnects VS3 → disconnection VS6, and in 105%, conversion process terminates for transformer stable operation.
(3) if the adjusting of above-mentioned tap switch terminates, output voltage UC>103%UN, primary side should continue growing winding turns
Number, gear -2 transforms to gear -3(W1, W2, W3 adjust winding access), it needs exist for illustrating, KM and-KM respectively represents same
The normally-closed contact and normally opened contact of a A.C. contactor, conversion process: VS5 is closed (original state) → triggering KM1(normally-closed contact
Disconnect, normally opened contact closure) → closure VS4 → disconnection VS5, be closed VS3 → disconnection VS4, transformer stable operation in 107.5%,
Conversion process terminates.
(4) if the adjusting of above-mentioned tap switch terminates, output voltage UC>103%UN, primary side should continue growing winding turns
Number, gear -3 is transitioned into gear -4(W1, W2, W3, W4 adjust winding access), conversion process: VS3 closure (original state) →
Trigger KM2(normally-closed contact to disconnect, normally opened contact closure) → closure VS6 → disconnection VS3, it is closed VS5 → disconnection VS6, transformer
In 110%, conversion process terminates for stable operation.
If secondary side voltage UC <97%UN, then boost process is carried out, as shown in figure 4, by taking A phase as an example,
(1) if secondary side output voltage UC<97%UN, primary side should reduce umber of turn, be transitioned into gear 1 from gear 0
(W4 adjusts winding and reversely accesses), conversion process: VS1, VS2 closure (original state) → disconnection VS2 → triggering KM1, KM3 →
It is closed VS4 → disconnection VS1, is closed VS3 → disconnection VS4, in 97.5%, conversion process terminates for transformer stable operation.
(2) if the adjusting of an above-mentioned tap switch terminates, output voltage UC<97%UN, primary side should continue reduce winding
The number of turns, gear -1 are transitioned into gear -2(W4, W3 adjusting winding and reversely access), conversion process: VS3 closure (original state) → close
VS6 → disconnection VS3 is closed, is closed VS5 → disconnection VS6, in 95%, conversion process terminates for transformer stable operation.
(3) if the adjusting of above-mentioned tap switch terminates, output voltage UC<97%UN, primary side should continue reduce umber of turn,
Gear -2 is transitioned into gear -3(W4, W3, W2 adjust winding and reversely access), conversion process: VS5 is closed (original state) → shutdown
KM1 → closure VS4 → disconnection VS5 is closed VS3 → disconnection VS4, and in 92.5%, conversion process terminates for transformer stable operation.
(4) if the adjusting of above-mentioned tap switch terminates, output voltage UC<97%UN, primary side should continue reduce umber of turn,
Gear -3 is transitioned into gear -4(W4, W3, W2, W1 adjust winding and reversely access), conversion process: VS3 closure (original state) →
KM4 → closure VS6 → disconnection VS3 is triggered, is closed VS5 → disconnection VS6, in 90%, conversion process terminates for transformer stable operation.
Decompression, boost process need successively gear adjusting, can not multistage across shelves adjustings.
The present invention is not limited to the above embodiment.All technical solutions formed using equivalent replacement, are all fallen within the present invention and wanted
The protection scope asked.
Claims (3)
1. a kind of Multi-stage on-load automatic voltage-regulating distribution transformer, including distribution transformer, tap-changing windings module and control module,
Be characterized in that: the tap-changing windings module includes groundwork winding W0, the tune that is serially connected with after the groundwork winding W0
Winding circuit and the current-limiting protection circuit A with the tap-changing windings circuit in parallel are pressed, the tap-changing windings circuit includes sequence
Concatenated adjusting winding W1, winding W2 is adjusted, winding W3 is adjusted, adjusts winding W4, set between each tie point for adjusting winding
There are multiple controlled switch, the tap-changing windings circuit further includes current-limiting protection circuit B and current-limiting protection circuit C, and the current limliting is protected
After protection circuit B is serially connected with adjusting winding W1 and/or adjusts winding W3, the current-limiting protection circuit C, which is serially connected with, adjusts winding W2
And/or after adjusting winding W4；
The control module includes being used to monitor the PLC control system of low-pressure side voltage positioned at distribution transformer low-pressure side winding,
The opening and/or closure that the PLC control system changes control controlled switch according to distribution transformer low-pressure side voltage are to adjust
The distribution transformer low-pressure side voltage；The controlled switch is A.C. contactor,
Normally-closed contact one end of A.C. contactor one is connected to the tie point for adjusting winding W1 and adjusting winding W2, A.C. contactor
One end of one normally opened contact is connected to the tie point for adjusting winding W3 and adjusting winding W4, the normally-closed contact of A.C. contactor one
The other end be connected to same tie point with the other end of the normally opened contact of A.C. contactor one and concatenated after the tie point
Current-limiting protection circuit B；
Normally-closed contact one end of A.C. contactor two is connected to the tie point for adjusting winding W2 and adjusting winding W3, A.C. contactor
One end of two normally opened contact is serially connected with adjust winding W4 after, the other end of the normally-closed contact of A.C. contactor two connects with exchanging
The other end of the normally opened contact of tentaculum two is connected to same tie point, normally-closed contact one end of the tie point and A.C. contactor four
Connection；
One end of the normally-closed contact of A.C. contactor three is connected with one end of the normally opened contact of A.C. contactor three, and is serially connected with base
After this Working winding W0, the other end concatenation of the normally-closed contact of A.C. contactor three adjusts winding W1, A.C. contactor three
The other end of normally opened contact is connected to the tie point for adjusting winding W4 and two normally opened contact of A.C. contactor；
One end of the normally opened contact of A.C. contactor four is connected to the normally-closed contact of A.C. contactor three and adjusts the company of winding W1
The other end of contact, the normally opened contact of A.C. contactor four is connect and at it with the other end of the normally-closed contact of A.C. contactor four
Connect current-limiting protection circuit C afterwards;The current-limiting protection circuit A is that the first anti-parallel thyristor concatenation is connected in parallel with each other
Two anti-parallel thyristors and current-limiting resistance R3；The current-limiting protection circuit B is current-limiting resistance R1 series connection third anti-parallel thyristor
It is in parallel with the 4th anti-parallel thyristor again afterwards；The current-limiting protection circuit C is current-limiting resistance R2 the 5th anti-parallel thyristor of series connection
It is in parallel with the 6th anti-parallel thyristor again afterwards.
2. Multi-stage on-load automatic voltage-regulating distribution transformer according to claim 1, it is characterised in that: the groundwork around
Group W0, winding W1, the adjusting winding W2, the coil ratio for adjusting winding W3, adjusting winding W4 of adjusting are
100:2.5:2.5:2.5:2.5。
3. Multi-stage on-load automatic voltage-regulating distribution transformer according to claim 1, it is characterised in that: PLC control system
System acquires the low-pressure side C phase voltage of the distribution transformer with given threshold compared in real time, according to the result of the comparison to it is each instead simultaneously
The normally-closed contact and/or normally opened contact of connection thyristor and each A.C. contactor are controlled.
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| CN115206657A (en) * | 2022-06-20 | 2022-10-18 | 江苏省电力试验研究院有限公司 | Thyristor-based arcless on-load voltage regulation switch device for distribution transformer |
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