CN106252040A - A kind of without arc loaded automatic voltage-regulating distribution transformer device and pressure regulation method thereof - Google Patents
A kind of without arc loaded automatic voltage-regulating distribution transformer device and pressure regulation method thereof Download PDFInfo
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- CN106252040A CN106252040A CN201610685827.XA CN201610685827A CN106252040A CN 106252040 A CN106252040 A CN 106252040A CN 201610685827 A CN201610685827 A CN 201610685827A CN 106252040 A CN106252040 A CN 106252040A
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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
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Abstract
The invention provides a kind of without arc loaded automatic voltage-regulating distribution transformer device, comprising: low-pressure side and high-pressure side；Low-pressure side includes: low pressure winding, and high-pressure side includes: N number of tap-changing windings, N number of switch module, high pressure winding and Regulation Control module, and each tap-changing windings is in parallel with each switch module；High pressure winding and the series connection of N number of switch module.The technical scheme that the present invention provides utilizes vector concatenation and the fade function of electronic switch unit of tap-changing windings, on the one hand eliminates the generation of electric arc during pressure regulation, on the other hand improves the speed of pressure regulation, scope and precision.
Description
Technical field
The present invention relates to the voltage automatic adjustment technology field of distribution transformer, in particular to one is downloaded from moving without arc
Voltage regulating distribution transformer device and pressure regulation method thereof.
Background technology
In power system, the application of ULTC is more and more extensive, and it can in raising system voltage quality and power supply
It is very important by the effect in terms of property.But traditional ULTC is to be adjusted it by mechanical type load ratio bridging switch
Tap and relevant electrical components complete, and produce bigger electric arc, easy ablation contact during the switching of shunting switch on-load
Cause greasy dirt to contaminate, affect insulation characterisitic and the service life of transformator.Motor-operating mechanism easily breaks down, according to relevant data
Statistics, its fault rate accounts for the 80% of shunting switch event, and maintenance workload is big, constrains sending out of transformer on-load voltage regulating effect
Wave.
Distribution transformer automatic Regulation technology presently, there are two aspect problems: one is sufficient at Power System Reactive Power
In the case of, distribution transformer employing loaded automatic voltage-regulating is the most effective way of burning voltage, and on-load tap changer is
The main device of automatic powerstat, the existing shunting switch overwhelming majority is mechanical type contact switch, and this switch is not
Only with the generation of electric arc during switching, mechanical contact is easily damaged, and governing speed is slow, it is impossible to frequent operation, therefore limits
The range of application of this switch.Two is that the conventional distribution transformer degree of regulation containing tapping regulation is the highest, about gives
Determining the 2.5% of voltage, in the case of positive and negative each three grades of tappings, the range of accommodation of distribution transformer is about its given voltage
-7.5%～7.5%.
At present, a small amount of employing power electronic devices switch module is also had to control transformer regulating winding to realize the phase of pressure regulation
Close patent, but on the one hand these patents exist topological structure complexity, it is achieved the problem of difficulty of getting up, on the other hand exist normal
Under state, power electronic devices is constantly in duty, there is the problem such as energy loss, persistently driving and Ability of Resisting Disturbance difference.
Accordingly, it is desirable to provide a kind of technical scheme meets the needs of prior art.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of without arc loaded automatic voltage-regulating distribution transformer
Device, comprising: low-pressure side and high-pressure side；Low-pressure side includes low pressure winding, and high-pressure side includes: N number of tap-changing windings, N number of switch
Module, high pressure winding and Regulation Control module, each tap-changing windings is in parallel with each switch module；High pressure winding and N number of switch
Block coupled in series.Switch module includes: switching switch, electronic switch unit and normally closed switch.
Switching switch includes: magnetic latching relay or the position with four terminals switch switch.
One end of two terminals of a position switching switch in position switching switch is connected with one end of tap-changing windings,
Its another two terminal is connected with two terminals externally concatenated in switch module respectively；
In another location switching switch in position switching switch, two terminals are connected with the other end of tap-changing windings, and it is another
Two terminals that outer two terminals externally concatenate with switch module respectively are connected；The two ends of electronic switch unit and normally closed switch are divided
Two terminals externally not concatenated with switch module are connected.
The end that externally connects of electronic switch unit is connected with the two ends of varistor；Varistor and two reversely and connect
IGCT is in parallel.
One external connection end of electronic switch unit respectively with the negative electrode of diode and insulated gate bipolar transistor
Colelctor electrode is connected；Another of electronic switch unit externally connect end respectively with negative electrode and another insulated gate bipolar of another diode
The colelctor electrode of transistor npn npn is connected；The anode of above-mentioned two diode respectively with above-mentioned two insulated gate bipolar transistor send out
Emitter-base bandgap grading is connected；The anode of diode is connected with the anode of another diode, the emitter stage of insulated gate bipolar transistor and another
The emitter stage of insulated gate bipolar transistor is connected.
One external connection end of electronic switch unit respectively with the negative electrode of diode and insulated gate bipolar transistor
Emitter stage is connected；Another of electronic switch unit externally connect end respectively with negative electrode and another insulated gate bipolar of another diode
The emitter stage of transistor npn npn is connected；The anode of above-mentioned two diode respectively with the collection of above-mentioned two insulated gate bipolar transistor
Electrode is connected；The anode of diode is connected with the anode of another diode, the colelctor electrode of insulated gate bipolar transistor and another
The colelctor electrode of insulated gate bipolar transistor is connected.
Between two external connection ends of electronic switch unit, it is provided with two diode branch in parallel；Article one, diode
Branch road is provided with the diode that two negative electrodes reversely dock, and another diode branch is provided with the diode that two anodes reversely dock；
The negative electrode of two diodes that negative electrode reversely docks is connected with the colelctor electrode of insulated gate bipolar transistor respectively, and anode is the most right
The anode of two diodes connect is connected with the emitter stage of insulated gate bipolar transistor respectively.
Regulation Control module includes: power taking unit, the Operations Analysis being connected with power taking unit, and same operation control
The measuring unit that unit is connected and triggering output unit.
Its method comprises the steps:
A. the difference between the output voltage of current low-pressure side and given voltage is determined；
B. difference is compared with the step-length voltage regulating of low-pressure side；
C. according to high voltage regulation winding state matrix each change formed switch module control logic；
D. according to the control logic of all switch modules, it is sequentially adjusted in the concatenation state of tap-changing windings.
Step B includes:
If B1. difference is less than described step-length voltage regulating, then return the size continuing to judge difference；
If B2. difference is more than described step-length voltage regulating, determine that the state matrix that current high voltage regulation winding is corresponding is S.
Step B2 includes:
When current low-pressure side Voltage Cortrol is for given voltage, the state matrix that high voltage regulation winding is corresponding is S '.
Step C includes:
C1. judge whether first quantity of state of state matrix S and S ' changes；
If C2. first quantity of state change, then formed corresponding with this mode bit according to the change of first quantity of state
The control logic of switch module；
If C3. first quantity of state change is unchanged, then continue to judge that the second quantity of state of state matrix S and S ' is
No change；
If C4. second quantity of state changes, then formed corresponding with this mode bit according to the change of second state
The control logic of switch module；
If C5. second state is unchanged, then continue to judge next bit, until last position.
Step D includes:
D1. according to the control logic of switch module, the action of all switch modules is controlled successively；
D2. according to the action of all switch modules, the concatenation state of tap-changing windings is changed.
The concatenation state of tap-changing windings includes: tap-changing windings forward concatenates into high pressure winding, and tap-changing windings is shorted and adjusts
Pressure winding reversely concatenates into high pressure winding.
Tap-changing windings forward concatenates and includes into high pressure winding:
When electronic switch unit turns on, and normally closed switch disconnects, switching switch K1 in position is switched to A1-C1 conducting, position
After switching switch K2 is switched to B2-D2 conducting, disconnecting electronic switch unit, electric current is from externally connecting terminal E1 through A1-C1-B2-D2
Flowing to externally connect terminal E2, the tap-changing windings that now switch module is corresponding is from externally connecting terminal E1 to externally connecting terminal E2
Access；The on high-tension side equivalent winding number of turn increases.
Tap-changing windings is shorted and includes:
After electronic switch unit conducting and normally closed switch are both turned on, then disconnecting electronic switch unit, electric current is from externally connecting
Connecting terminal E1 flows to externally connect terminal E2 through normally closed switch；
The on high-tension side equivalent winding number of turn is constant.
Tap-changing windings reversely concatenates and includes into high pressure winding:
When electronic switch unit turns on, and normally closed switch disconnects, switching switch K1 in position being switched to B1-D1 conducting, position is cut
Changing after switch K2 is switched to A2-C2 conducting, disconnect electronic switch unit, electric current flows through A2-C2-B1-D1 from externally connecting terminal E1
To externally connecting terminal E2, the tap-changing windings that now switch module is corresponding from described external connection terminal E2 to externally connecting terminal
E1 accesses；The on high-tension side equivalent winding number of turn reduces.
On high-tension side step-length voltage regulating:
Wherein, UHAnd ULIt is respectively on high-tension side ceiling voltage and minimum voltage；
K=3N, N is the number of tap-changing windings, and K is pressure regulation progression.
The whole of N number of tap-changing windings may access state S0For:
Wherein, S0Matrix N row altogether, 3NOK.
Number of turn M of tap-changing windings and on high-tension side basic umber of turn M0Relation be:
M=T0*M0
T0For corresponding coefficient matrix.
Coefficient matrix T0:
The tap-changing windings number of turn sum that the equivalent winding number of turn is on high-tension side basic umber of turn and access that high pressure is surveyed；
Then equivalent winding number of turn Meq and on high-tension side basic umber of turn M0Relation be: Meq=(1+S0*T0)*M0。
Compared with immediate prior art, the technical scheme that the present invention provides has the advantages that
1, the present invention is by changing topological structure and voltage regulating mode, makes tap-changing windings vector seal in high pressure winding, thus
Realize voltage regulation function.
2, voltage-regulation principle provided by the present invention can realize the split-phase voltage regulation function of transformator and according to low-pressure side voltage
Realize dynamic voltage adjustment function.
3, this invention simplifies equipment configuration, reduce the volume of distribution transformer and unnecessary cost.
4, this invention removes the hidden danger of original motor switch mechanism, it is easier to by software control be rapidly completed selection and
Switching, and effectively extend the service life of switch.
5, the electronic switch unit used by the present invention does not the most seal in high-pressure side winding, therefore does not drive
And power attenuation.
Accompanying drawing explanation
Fig. 1 is the structural representation of a circuitry phase in the embodiment of the present invention；
Fig. 2 is the electrical block diagram of switch module of the present invention and tap-changing windings；
Fig. 3 is the structural representation of Regulation Control module of the present invention；
Fig. 4 is the electronic switch unit form 1 of the present invention；
Fig. 5 is the electronic switch unit form 2 of the present invention；
Fig. 6 is the electronic switch unit form 3 of the present invention；
Fig. 7 is the electronic switch unit form 4 of the present invention；
Fig. 8 is the logical schematic that tap-changing windings of the present invention puts into or exits；
Fig. 9 is the pressure regulation process flow diagram flow chart of transformator of the present invention.
Detailed description of the invention
Below in conjunction with Figure of description, technical scheme is described in further details.
As it is shown in figure 1, a kind of high accuracy includes without arc loaded automatic voltage-regulating distribution transformer: transformer high-voltage winding, change
Depressor low pressure winding, n tap-changing windings, n switch module, a control module.Wherein n is positive integer (generally 2 or 3),
And each tap-changing windings is all connected with a switch module.
As in figure 2 it is shown, switch module all includes: two positions switching switch (or having the switch of similar handoff functionality) K1 and
K2, an electronic switch unit K3, a normally closed switch K4；Switch module one end is connected with tap-changing windings, the other end E1 and E2
It is serially connected in high pressure winding；A1, A2 terminal of position switching switch K1 with K2 of switch module is all connected with E1, D1 and D2 end
Son is all connected with E2；B1 with the C1 terminal of the position switching switch K1 of switch module is connected with the X1 end of tap-changing windings, switch
B2 with the C2 terminal of the position switching switch K2 of module is connected with the X2 end of tap-changing windings；The electronic switch unit K3 of switch module
One end be connected with E1, the other end is connected with E2；One end of the normally closed switch K4 of switch module is connected with E1, the other end
It is connected with E2.
As it is shown on figure 3, control module specifically includes that power taking unit, measuring unit, Operations Analysis and triggering output are single
Unit, the ULTC of the present embodiment can be according to the voltage pulsation practical situation of distribution transformer place power distribution network, with control
Low-pressure side output voltage processed is target in given range, by control switch module cut-off logic, tap-changing windings can be made
Forward, reverse or short circuit access high pressure winding, change the equivalent winding number of turn of high pressure winding, thus stablize distribution on a large scale
The voltage output of step down side.In having any pressure regulation transformation process carrying transformer switch module, first make electricity
Sub-switch element K3 turns on, the most again adjusting position switching switch or the break-make of normally closed switch K4, thus eliminates transformation process
The generation of middle electric arc.
Meanwhile, the invention provides and a kind of determine the range of regulation of distribution transformer on-load voltage regulating device, pressure regulation progression, tune
Pressure method of relation between winding quantity, step-length voltage regulating, the tap-changing windings number of turn, defines the input of transformer regulating winding vector
Or the logical method that exits and transformer regulating flow process.The method regulates the scope of voltage and the number of tap-changing windings as required
Amount, determines the step-length of voltage-regulation, so that it is determined that the number of turn of tap-changing windings.Owing to the pressure regulation progression of transformator is along with tap-changing windings
The increase of number and increase exponentially times, according to the method on the premise of given voltage-regulation step-length, by increasing pressure regulation
The quantity of winding, significantly increases voltage regulation limits；Under any given range of regulation premise, by increasing tap-changing windings
Quantity, can significantly reduce voltage-regulation step-length, increases degree of regulation.
In the present embodiment, by controlling switch module, each switches on-off state, and it on the one hand can be made corresponding even
The tap-changing windings vector connect concatenates in high pressure winding, thus changes the equivalent number of turn of high pressure winding, on the other hand, can pass through
The generation of electric arc during the action elimination pressure regulation of electronic switch unit.
As a example by the switch module shown in Fig. 2 and tap-changing windings:
Situation 1, conduct electrons switch element K3, conducting switch K4, disconnect electronic switch unit K3, now electric current the most again
Directly flowing to terminal E2 from terminal E1 through K4, be equivalent to tap-changing windings and be shorted, the tap-changing windings that i.e. this switch module is corresponding does not has
Having access high pressure winding, the distribution transformer high-pressure side equivalent winding number of turn is constant.
Situation 2, conduct electrons switch element K3, disconnect switch K4, and switching switch K1 in position is switched to A1-C1 conducting,
By position switching switch K2 be switched to B2-D2 conducting, disconnect electronic switch unit K3, now electric current from terminal E1 through A1-C1-B2-
D2 flows to terminal E2, be now equivalent to tap-changing windings corresponding to this switch module from terminal E1 end to E2 terminate into, i.e. pressure regulation around
Group forward concatenates into high pressure winding, and the distribution transformer high-pressure side equivalent winding number of turn increases.
Situation 3, conduct electrons switch element K3, disconnect switch K4, and switching switch K1 in position is switched to B1-D1 conducting,
By position switching switch K2 be switched to A2-C2 conducting, disconnect electronic switch unit K3, now electric current from terminal E1 through A2-C2-B1-
D1 flows to terminal E2, be now equivalent to tap-changing windings corresponding to this switch module from terminal E2 end to E1 terminate into, i.e. pressure regulation around
Group reversely concatenates into high pressure winding, and the distribution transformer high-pressure side equivalent winding number of turn reduces.
By the cooperation of each switch on and off in switch module, can be by tap-changing windings corresponding for this switch module with just
To, reversely or the mode of short circuit introduces high pressure winding, it is achieved increase, reduce or keep original high pressure winding equivalent winding number of turn
Purpose.By being used in combination of multiple tap-changing windings and switch module, it is possible to achieve the governing stage of tap-changing windings order of magnitude several times
Number, significantly increases voltage regulation limits and the precision of distribution transformer so that the fluctuation of load terminal voltage maintains reasonably
In the range of.
As a kind of concrete implementation, the coiling direction of tap-changing windings is identical with the coiling direction of high pressure winding.
As a example by the switch module shown in Fig. 2 and tap-changing windings, when tap-changing windings coiling direction and high pressure winding around
When direction processed is identical, the polarity of 1 end of tap-changing windings is identical with the polarity of high pressure winding, when switch K4 conducting, the most now electricity
Stream directly flows to terminal E2 from terminal E1 through K4, is equivalent to tap-changing windings and is shorted, the tap-changing windings that i.e. this switch module is corresponding
Not concatenating into high pressure winding, the distribution transformer high-pressure side equivalent winding number of turn is constant.
When switch K4 disconnects, switching switch K1 in position is switched to A1-C1 conducting, and switching switch K2 in position is switched to B2-D2 conducting,
Now electric current flows to terminal E2 from terminal E1 through A1-C1-B2-D2, be now equivalent to tap-changing windings corresponding to this switch module from
Terminal E1 end to E2 terminate into, i.e. tap-changing windings forward concatenates into high pressure winding, the distribution transformer high-pressure side equivalent winding number of turn
Increase.When switch K4 disconnects, switching switch K1 in position is switched to B1-D1 conducting, and switching switch K2 in position is switched to A2-C2 conducting, this
Time electric current flow to terminal E2 from terminal E1 through A2-C2-B1-D1, be now equivalent to tap-changing windings corresponding to this switch module from end
Sub-E2 end to E1 terminate into, i.e. tap-changing windings reversely concatenates into high pressure winding, and the distribution transformer high-pressure side equivalent winding number of turn subtracts
Few.
As in figure 2 it is shown, switch in the position switching that switch module is corresponding, it has four terminals, and function is by its four ends
The conducting state of two terminals in son is transformed to the conducting of two other terminal, without there is the situation simultaneously turned on, such as
Position switching switchs K1, and it is only possible to be to turn between conducting or B1-D1 between A1-C1, or converts between, as
Between A1-C1, conducting is transformed between B1-D1 conducting, without there being other states.This position switching switch is in the specific implementation
It can be magnetic latching relay.
Regulation Control modular structure schematic diagram as shown in Figure 3, Regulation Control module mainly includes power taking unit, measures list
Unit, Operations Analysis, triggering output unit.Power taking unit draws and is connected to high pressure winding (as shown in Figure 2), logical power taking transformator T
Electric energy is provided for whole control module.Measuring unit is mainly used in the output voltage of measuring transformer low-pressure side, for pressure regulation transformation
The pressure regulation of device provides reference, usually with low-pressure side rated voltage for adjusting target.
Given voltage is the output target voltage of transformator, according to the step down side port of export and low-voltage circuit end
Voltage all sets in acceptability limit, usually rated voltage.
Operations Analysis is the current low-pressure side voltage provided according to measuring unit and the difference of given voltage, calculates height
The umber of turn that pressure side should adjust, generates intended tap-changing windings state matrix and pressure regulation logic.Trigger output unit, according to
The pressure regulation logic that Operations Analysis generates, exports the control signal of response, on or off respective switch chronologically, it is achieved adjust
Pressure winding by pressure regulation logic by forward, reverse or short-circuit in the way of concatenate into high-pressure side, thus realize pressure regulation purpose.
As shown in Figure 4, as a kind of specific embodiment of electronic switch unit K3, electrical switch list in switch module
Unit K3 includes the IGCT SCR1 of two reverse parallel connections, IGCT SCR2 and a varistor R1, the anode of IGCT SCR1
Be connected with the negative electrode of IGCT SCR2 and one end of varistor R1 respectively, the anode of IGCT SCR2 respectively with IGCT SCR1
Negative electrode be connected with the other end of varistor R1, external respectively as electronic switch unit K3 of two public connecting end P and Q
Connect end.Owing to above-mentioned two IGCT can realize respective on or off under the effect of control signal, it is thus possible to
Realize electronic switch unit K3 two-way on-off function at different conditions.In this switch element, in parallel with two IGCTs
Varistor R1 for limiting the voltage at IGCT two ends, protect IGCT.
As it is shown in figure 5, as the another kind of detailed description of the invention of electronic switch unit K3, electrical switch list in switch module
Unit K3 includes: two insulated gate bipolar transistor (IGBT) T1, T2 and two diodes D1, D2, insulated gate bipolar crystal
The emitter stage of pipe T1 respectively with the emitter stage of insulated gate bipolar transistor T2, the anode of diode D1, the anode of diode D2
Being connected, the colelctor electrode of insulated gate bipolar transistor T1 is connected, absolutely with outside public connecting end P respectively with the negative electrode of diode D2
The colelctor electrode of edge grid bipolar transistor T2 is connected with outside public connecting end Q respectively with the negative electrode of diode D1.
As shown in Figure 6, as another detailed description of the invention of electronic switch unit K3, electrical switch list in switch module
Unit includes: two insulated gate bipolar transistor (IGBT) T3, T4 and two diodes D3, D4, insulated gate bipolar transistor
The colelctor electrode of T3 respectively with the colelctor electrode of insulated gate bipolar transistor T4, the anode of diode D1, the anode phase of diode D2
Even, the emitter stage of insulated gate bipolar transistor T3 is connected with outside public connecting end P respectively with the negative electrode of diode D4, insulation
The emitter stage of grid bipolar transistor T4 is connected with outside public connecting end Q respectively with the negative electrode of diode D3.
As it is shown in fig. 7, as another detailed description of the invention of electronic switch unit K3, electrical switch list in switch module
Unit includes: insulated gate bipolar transistor (IGBT) T5 and four diodes D5, D6, D7, D8, insulated gate bipolar transistor T5
Colelctor electrode be connected with negative electrode, the negative electrode of diode D6 of diode D5 respectively, the emitter stage of insulated gate bipolar transistor T5
Be connected with anode, the anode of diode D8 of diode D7 respectively, outside public connecting end P respectively with the negative electrode of diode D7,
The anode of diode D5 is connected, and outside public connecting end Q is connected with negative electrode, the anode of diode D6 of diode D8 respectively.
At tap-changing windings corresponding to switch module in the conversion process each time of on high-tension side concatenation state, such as from just
To seal in be transformed to short circuit access state, seal in from forward be transformed to reverse access state, from short circuit access state be transformed to instead
Being transformed to short circuit access state to access state, reverse access state, first turn in switch module is all electrical switch list
Unit K3, then other switches K1, K2 and K4 needs to access the switching of on high-tension side state or conducting, last electronics according to tap-changing windings
Switch element K3 disconnect, a conversion process terminates, electronic switch unit K3 whole tap-changing windings along string, play a reversed role and short circuit
Handoff procedure in play transitional function.
In the detailed description of the invention of 4 kinds of electronic switch unit K3 from Fig. 4 to Fig. 7, owing to have employed IGBT and IGCT
Deng electrical switch, particularly IGBT has the advantages such as switching speed is fast, Heat stability is good, driving power are little, drive circuit is simple,
Make K3 not only have good switching characteristic, be also equipped with eliminating the generation of ordinary tap electric arc in transient process.
In the simply reality application of high-low pressure winding as shown in Figure 2 and tap-changing windings in distribution transformer three-phase windings one
The pressure regulation signal of phase connects figure, and other biphase connected modes are identical with Fig. 2.
The invention provides and a kind of determine that the range of regulation of distribution transformer on-load voltage regulating device, pressure regulation progression (are directly determined
Determine regulation precision), tap-changing windings quantity, step-length voltage regulating, the method for relation between the tap-changing windings number of turn.Owing to distribution transformer is high
Pressure side, the ratio of voltage of low-pressure side are directly proportional to the number of turn of high-low pressure winding, therefore by regulation high-pressure side equivalent winding, permissible
The rational scope of voltage to one of regulation low-pressure side.The range of regulation U of distribution transformerH-UL, pressure regulation progression K, tap-changing windings
Quantity N, tap-changing windings number of turn M are the relation affected each other, wherein a UH,ULFor the high-pressure side the highest electricity in range of accommodation
Pressure and minimum voltage.Such as, on high-tension side pressure regulation progression K is relevant with tap-changing windings quantity N, high voltage regulation scope UH-ULIt is equal to
Pressure regulation progression K and the product of basic step-length Ui of pressure regulation, basic step-length Ui of pressure regulation is relevant with tap-changing windings number of turn M.
Determine the relation of pressure regulation progression K and tap-changing windings quantity N first below:
Assume that tap-changing windings number is N=3, can be realized by the conversion of switch module corresponding to each tap-changing windings
Tap-changing windings along string, play a reversed role and short circuit accesses the access shape of the state of high pressure winding, i.e. switch module and corresponding tap-changing windings
State is closely related, and the state of each switch module correspond to the equivalent winding number of turn that different high-pressure sides is total.
For convenience, according to the function of state Si of formula (1) definition switch module: when switch K4 disconnects, and position is cut
Change switch K1 be switched to A1-C1 conducting, position switching switch K2 be switched to B2-D2 conducting, now electric current from terminal E1 through A1-C1-B2-
D2 flows to terminal E2, be now equivalent to tap-changing windings corresponding to this switch module from terminal X1 end to X2 terminate into, i.e. pressure regulation around
Group forward concatenates into high pressure winding, Si=1；When switch K4 conducting, electric current directly flows to terminal E2 from terminal E1 through K4, is equivalent to
When tap-changing windings is shorted, Si=0；When switch K4 disconnects, switching switch K1 in position is switched to B1-D1 conducting, position switching switch
K2 is switched to A2-C2 conducting, and now electric current flows to terminal E2 from terminal E1 through A2-C2-B1-D1, is now equivalent to this switch module
Corresponding tap-changing windings from terminal X2 end to X1 terminate into, i.e. tap-changing windings reversely concatenates into high pressure winding, Si=-1.
Owing to switch module that each tap-changing windings is corresponding exists three kinds of different states, tap-changing windings is accessed, because of
This is in order to be able to characterize all situations, based on formula (1), constructs the pressure regulation state matrix of 3 tap-changing windings, works as line pressure regulator
When the number of circle is N=2, the progression of pressure regulation progression is 9；As shown in (2) formula, when the number of voltage regulation coil is N=3, pressure regulation
The progression of progression is 27；This state matrix includes the whole possible access state of 3 tap-changing windings.
It is hereby understood that when the number of voltage regulation coil is N=4, the progression of pressure regulation progression is 81；Number when voltage regulation coil
During for N, the progression of pressure regulation progression is 3N, the most possible access state matrix of the most N number of voltage regulation coil is:
Pressure regulation progression K with the relation of tap-changing windings number N is:
K=3N(N=1,2,3) (4)
The basic step-length of pressure regulation:
Assume that the basic umber of turn in high-pressure side is M0, it is U that high-pressure side gives voltage0, basic step-length U of pressure regulationiCorresponding winding
The number of turn be Mi:
Assuming that Mi=0.01M0, pressure regulation multiple based on 0.01；When the number of voltage regulation coil is N=3, owing to formula (4) can
Knowing, the truth of a matter of pressure regulation progression correspondence formula is 3, and therefore the multiple proportion of different tap-changing windings also should be 3, three tap-changing windings
The number of turn is respectively 0.01M0, 0.03M0, 0.09M0, represent tap-changing windings M and high-pressure side basic umber of turn M with matrix0Relation
For:
T is corresponding coefficient matrix, the coefficient matrix T of the most N number of voltage regulation coil0For:
Owing to the high pressure equivalent winding number of turn is the basic umber of turn in high-pressure side and the number of turn sum accessing tap-changing windings, according to
Formula (2) and (7) can go out the equivalent winding number of turn of high pressure winding with the form calculus of matrix, then be N when the number of voltage regulation coil
When=3, high-pressure side equivalent winding number of turn Meq is:
Knowable to formula (8), after the access high pressure winding of three tap-changing windings vectors, high-pressure side equivalent winding have 27 adjustable
Level, number of turn excursion is the 87%-113% of original high pressure umber of turn, i.e. change on the basis of original high pressure number of turn-
13%-13%, thus the excursion of distribution transformer low-pressure side output voltage is also for the 87%-113% of given voltage.
Owing to the regulation target of voltage regulating distribution transformer is for keeping low-pressure side voltage stabilization, it will also be appreciated that at high pressure
Side is in the range of the 87%-113% of given voltage, and adjustable transformer can keep low-pressure side voltage to be constant given output electricity
Pressure.
From the implementation case, we see that, when range of regulation gives timing, as long as increasing the quantity of tap-changing windings, with regard to energy
Increase pressure regulation progression, increase degree of regulation, reduce basis pressure regulation multiple simultaneously；When tap-changing windings quantity gives timing, pressure regulation progression
Also the most fixed, as long as increasing basis pressure regulation multiple, the scope of pressure regulation just can be significantly increased, this is for developing phase for different demands
The product answered specifies direction.
The invention provides a kind of on the premise of having determined that tap-changing windings quantity and the number of turn, true according to pressure regulation change demand
Determine the logical method putting into or exiting and the regulating process of transformator of tap-changing windings vector.The mesh of distribution transformer automatic Regulation
Be by adjust on high-tension side equivalence the number of turn keep stablizing of low-pressure side voltage, the most different high side voltage correspondences is not
The same pressure regulation equivalence number of turn, pressure regulation process is exactly the process putting into or exiting of different winding.
As shown in Figure 8, still with number N=3 of tap-changing windings, the number of turn of tap-changing windings is respectively 0.01M0, 0.03M0,
0.09M0As a example by the pressure regulation logic of transformator is described；From formula (2) and (8), each on high-tension side equivalence circle in formula (8)
A pressure regulation state matrix in number all correspondings (2), reflects the input of different tap-changing windings or exits state, such as formula (8)
The middle equivalence number of turn is 0.93M0Time, corresponding pressure regulation state matrix is [-1,1 ,-1], 1.01M0Corresponding pressure regulation state matrix is
[1,0,0]；If according to pressure regulation demand, corresponding equivalent winding needs from 0.93M0Become 1.01M0Time, only need to be by corresponding pressure regulation shape
State matrix is adjusted to [1,0,0] from [-1,1 ,-1], corresponding 0.01M0The quantity of state of tap-changing windings is become 1 from-1, i.e. this tap-changing windings
Become forward from the state that reversely seals in and seal in state, but due to the short circuit transition of electrical switch branch road, its reality is transformed
Journey is that quantity of state is become 0 from-1, becomes 1 the most again, i.e. this tap-changing windings becomes short-circuit condition from reversely sealing in state, then exists
Displacement forward seals in state；Corresponding 0.03M0The quantity of state of tap-changing windings is become 0 from 1, i.e. this tap-changing windings is sealed in shape by forward
State becomes short-circuit condition；Corresponding 0.09M0The quantity of state of tap-changing windings is become 0 from-1, and i.e. this tap-changing windings is by reversely sealing in state
Become short-circuit condition；Its sequencing is from tap-changing windings elder generation transition state corresponding to state matrix leftmost side variable, successively to
The tap-changing windings then transition state that right side variable is corresponding, to the last one.
As it is shown in figure 9, be transformer on-load voltage regulating process flow diagram flow chart.The steps include: to first determine whether low-pressure side output voltage
(this step-length voltage regulating is high voltage regulation step-length Ui and change to the step-length voltage regulating the most corresponding more than low-pressure side with the difference of given voltage
The ratio of transformer voltage ratio, in Fig. 8 example, Ui=0.01*10kV=100V, then now low-pressure side correspondence step-length voltage regulating is just
100V/10/0.4=4V), if greater than this step-length voltage regulating, it is judged that the state matrix that each tap-changing windings of current high-pressure side is corresponding
S, according to the difference of low-pressure side current voltage Yu given voltage, calculating current low-pressure side Voltage Cortrol is high pressure during given voltage
The state matrix S ' that each tap-changing windings of side is corresponding；Then first corresponding for state matrix S and S ' (square of tap-changing windings is judged
Battle array position, the leftmost side) whether quantity of state change, if changed, then forms corresponding tap-changing windings according to the change of this mode bit
Switch control logic, without change, then continues to judge whether second quantity of state corresponding for state matrix S and S ' has change
Changing, if changed, then forming the switch control logic of corresponding tap-changing windings according to the change of this mode bit, without change
Change, then continue to judge to the right next bit, until last position.Finally, it is judged that state matrix S and S ' contrast terminate after, according to
The switch control logic of upper each tap-changing windings of formation, action control switch successively, according to from left to right, that is first regulate the number of turn
Few tap-changing windings, the order of the tap-changing windings that the rear regulation number of turn is many, adjust the concatenation state of each tap-changing windings, it is achieved pressure regulation
Purpose, terminates this pressure regulation process.
Finally should be noted that: above example only in order to illustrate that technical scheme is not intended to limit, institute
The those of ordinary skill in genus field still the detailed description of the invention of the present invention can be modified with reference to above-described embodiment or
Equivalent, these are without departing from any amendment of spirit and scope of the invention or equivalent, all await the reply in application this
Within bright claims.
Claims (23)
1. without an arc loaded automatic voltage-regulating distribution transformer device, comprising: low-pressure side and high-pressure side；Described low-pressure side includes
Low pressure winding, described high-pressure side includes: N number of tap-changing windings, N number of switch module, high pressure winding and Regulation Control module, its feature
It is,
Each described tap-changing windings is in parallel with each described switch module；Described high pressure winding and the series connection of described N number of switch module.
Distribution transformer device the most according to claim 1, it is characterised in that described switch module includes: switching switch,
Electronic switch unit and normally closed switch.
Distribution transformer device the most according to claim 2, it is characterised in that described switching switch includes: magnetic keeps continuing
Electrical equipment or the position with four terminals switch switch.
Distribution transformer device the most according to claim 3, it is characterised in that
One end of two terminals of a position switching switch in described position switching switch and one end of described tap-changing windings
Being connected, its another two terminal is connected with two terminals externally concatenated in described switch module respectively；
In another location switching switch in described position switching switch, two terminals are connected with the other end of described tap-changing windings,
Two terminals that its two other terminal externally concatenates with described switch module respectively are connected；
Two terminals that the two ends of described electronic switch unit and described normally closed switch externally concatenate with described switch module respectively
It is connected.
Distribution transformer device the most according to claim 2, it is characterised in that
The end that externally connects of described electronic switch unit is connected with the two ends of varistor；
Described varistor and two IGCTs that are reverse and that connect are in parallel.
Distribution transformer device the most according to claim 2, it is characterised in that of described electronic switch unit is external
Connect end to be connected with the negative electrode of diode and the colelctor electrode of insulated gate bipolar transistor respectively；
Another of described electronic switch unit externally connect end respectively with negative electrode and another insulated gate bipolar of another diode
The colelctor electrode of transistor is connected；
The anode of above-mentioned two diode emitter stage with above-mentioned two insulated gate bipolar transistor respectively is connected；Described two poles
The anode of pipe is connected with the anode of another diode described, and the emitter stage of described insulated gate bipolar transistor is with described another is exhausted
The emitter stage of edge grid bipolar transistor is connected.
Distribution transformer device the most according to claim 2, it is characterised in that
One external connection end of described electronic switch unit respectively with the negative electrode of diode and insulated gate bipolar transistor
Emitter stage is connected；
Another of described electronic switch unit externally connect end respectively with negative electrode and another insulated gate bipolar of another diode
The emitter stage of transistor is connected；
The anode of above-mentioned two diode colelctor electrode with above-mentioned two insulated gate bipolar transistor respectively is connected；Described two poles
The anode of pipe is connected with the anode of another diode described, and the colelctor electrode of described insulated gate bipolar transistor is with described another is exhausted
The colelctor electrode of edge grid bipolar transistor is connected.
Distribution transformer device the most according to claim 2, it is characterised in that
Between two external connection ends of described electronic switch unit, it is provided with two diode branch in parallel；
Article one, diode branch is provided with the diode that two negative electrodes reversely dock, and it is reverse that another diode branch is provided with two anodes
The diode of docking；
The negative electrode of two diodes that described negative electrode reversely docks is connected with the colelctor electrode of insulated gate bipolar transistor respectively, institute
The anode stating two diodes that anode reversely docks is connected with the emitter stage of insulated gate bipolar transistor respectively.
Distribution transformer device the most according to claim 2, it is characterised in that described Regulation Control module includes:
Power taking unit, the Operations Analysis being connected with described power taking unit, and the measurement list being connected with Operations Analysis
Unit and triggering output unit.
10. the pressure regulation method without arc loaded automatic voltage-regulating distribution transformer, it is characterised in that comprise the steps:
A. the difference between the output voltage of current low-pressure side and given voltage is determined；
B. the step-length voltage regulating of described difference with described low-pressure side is compared；
C. according to high voltage regulation winding state matrix each change formed switch module control logic；
D. according to the control logic of all switch modules, it is sequentially adjusted in the concatenation state of tap-changing windings.
11. pressure regulation methods according to claim 10, it is characterised in that described step B includes:
If the most described difference is less than described step-length voltage regulating, then return the size continuing to judge described difference；
If the most described difference is more than described step-length voltage regulating, determine that the state matrix that current high voltage regulation winding is corresponding is S.
12. pressure regulation methods according to claim 11, it is characterised in that described step B2 includes:
When current low-pressure side Voltage Cortrol is described given voltage, the state matrix that described high voltage regulation winding is corresponding is
S’。
13. pressure regulation methods according to claim 12, it is characterised in that described step C includes:
C1. judge whether first quantity of state of state matrix S and S ' changes；
If the most described first quantity of state change, then formed and this mode bit pair according to the change of described first quantity of state
The control logic of the switch module answered；
If the most described first quantity of state change is unchanged, then continue to judge that the second quantity of state of state matrix S and S ' is
No change；
If the most described second quantity of state changes, then formed and this mode bit pair according to the change of described second state
The control logic of the switch module answered；
If the most described second state is unchanged, then continue to judge next bit, until last position.
14. according to the pressure regulation method described in claim 10 or 13, it is characterised in that described step D includes:
D1. according to the control logic of described switch module, the action of all switch modules is controlled successively；
D2. according to the action of described all switch modules, the concatenation state of described tap-changing windings is changed.
15. pressure regulation methods according to claim 14, it is characterised in that
The concatenation state of described tap-changing windings includes: described tap-changing windings forward concatenates into high pressure winding, described tap-changing windings quilt
Short circuit and described tap-changing windings reversely concatenate into described high pressure winding.
16. pressure regulation methods according to claim 15, it is characterised in that described tap-changing windings forward concatenates into high pressure winding
Including:
When electronic switch unit turns on, and normally closed switch disconnects, switching switch K1 in position being switched to A1-C1 conducting, position switches
After switch K2 is switched to B2-D2 conducting, disconnecting described electronic switch unit, electric current is from externally connecting terminal E1 through A1-C1-B2-D2
Flow to externally connect terminal E2, tap-changing windings corresponding to the most described switch module from described external connection terminal E1 to described right
Outer connection terminal E2 accesses；
The described on high-tension side equivalent winding number of turn increases.
17. pressure regulation methods according to claim 15, it is characterised in that described tap-changing windings is shorted and includes:
After electronic switch unit conducting and normally closed switch are both turned on, then disconnecting described electronic switch unit, electric current is from externally connecting
Connecting terminal E1 flows to externally connect terminal E2 through described normally closed switch；
The described on high-tension side equivalent winding number of turn is constant.
18. pressure regulation methods according to claim 15, it is characterised in that described tap-changing windings reversely concatenates into described high pressure
Winding includes:
When electronic switch unit turns on, and normally closed switch disconnects, switching switch K1 in position being switched to B1-D1 conducting, position switching is opened
After pass K2 is switched to A2-C2 conducting, disconnecting described electronic switch unit, electric current is from externally connecting terminal E1 through A2-C2-B1-D1 stream
To externally connecting terminal E2, tap-changing windings corresponding to the most described switch module from described external connection terminal E2 to described externally
Connect terminal E1 to access；
The described on high-tension side equivalent winding number of turn reduces.
19. pressure regulation methods according to claim 10, it is characterised in that described on high-tension side step-length voltage regulating:
Wherein, UHAnd ULIt is respectively described on high-tension side ceiling voltage and minimum voltage；
K=3N, N is the number of tap-changing windings, and K is pressure regulation progression.
20. pressure regulation methods according to claim 19, it is characterised in that the whole of N number of tap-changing windings may access state S0
For:
Wherein, S0Matrix N row altogether, 3NOK.
21. pressure regulation methods according to claim 20, it is characterised in that number of turn M of described tap-changing windings and described high pressure
The basic umber of turn M of side0Relation be:
M=T0*M0
T0For corresponding coefficient matrix.
22. pressure regulation methods according to claim 21, it is characterised in that described coefficient matrix T0:
23. pressure regulation methods according to claim 22, it is characterised in that
The equivalent winding number of turn that described high pressure is surveyed be described on high-tension side basic umber of turn with the tap-changing windings number of turn of access it
With；
Described equivalent winding number of turn Meq and on high-tension side basic umber of turn M0Relation be: Meq=(1+S0*T0)*M0。
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| CN201610685827.XA CN106252040A (en) | 2016-08-18 | 2016-08-18 | A kind of without arc loaded automatic voltage-regulating distribution transformer device and pressure regulation method thereof |
| PCT/CN2017/091524 WO2018032893A1 (en) | 2016-08-18 | 2017-07-03 | Arcless on-load automatic voltage-regulating distribution transformer device and voltage regulation method thereof |
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| CN201610685827.XA CN106252040A (en) | 2016-08-18 | 2016-08-18 | A kind of without arc loaded automatic voltage-regulating distribution transformer device and pressure regulation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018032893A1 (en) * | 2016-08-18 | 2018-02-22 | 中国电力科学研究院 | Arcless on-load automatic voltage-regulating distribution transformer device and voltage regulation method thereof |
| CN109038606A (en) * | 2018-08-08 | 2018-12-18 | 全球能源互联网研究院有限公司 | A kind of on-load regulator transformer and Unified Power Flow control system |
| CN110518845A (en) * | 2019-07-30 | 2019-11-29 | 广州供电局有限公司 | On-load tap-changer of transformer |
| CN112636244A (en) * | 2020-12-11 | 2021-04-09 | 国网湖南省电力有限公司 | Design method of dancing-eliminating and ice-melting transformer with wide voltage regulation and fine current regulation |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109142881B (en) * | 2018-08-11 | 2023-12-22 | 国网湖南省电力有限公司电力科学研究院 | Intelligent switching line device for electric test of power transformer |
| CN112748371B (en) * | 2020-12-18 | 2024-03-12 | 国网福建省电力有限公司检修分公司 | General test structure for multiple test items of transformer test and logic control method |
| CN112865569A (en) * | 2021-01-28 | 2021-05-28 | 三峡大学 | Single-phase three-level rectifier of mixed T-shaped bridge |
| CN114285341B (en) * | 2021-12-29 | 2023-12-15 | 西安交通大学 | Transient optimization control system and method for electric electronic on-load arcless capacity-regulating transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101697310B (en) * | 2009-11-03 | 2011-06-15 | 保定天威集团有限公司 | Winding connection structure for double-active-part on-load-tap-changing auto-transformer |
| CN102136354B (en) * | 2010-12-16 | 2012-10-24 | 保定天威集团有限公司 | Large-range on-load tap changer (OLTC) for testing |
| CN102420042B (en) * | 2011-12-05 | 2013-05-08 | 保定天威集团有限公司 | Multifunctional transformer for power plant |
| CN204884832U (en) * | 2015-08-26 | 2015-12-16 | 杭州佰盟智能开关有限公司 | Hybrid on -load voltage -regulating transformer |
| CN106252040A (en) * | 2016-08-18 | 2016-12-21 | 中国电力科学研究院 | A kind of without arc loaded automatic voltage-regulating distribution transformer device and pressure regulation method thereof |
-
2016
- 2016-08-18 CN CN201610685827.XA patent/CN106252040A/en active Pending
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018032893A1 (en) * | 2016-08-18 | 2018-02-22 | 中国电力科学研究院 | Arcless on-load automatic voltage-regulating distribution transformer device and voltage regulation method thereof |
| CN109038606A (en) * | 2018-08-08 | 2018-12-18 | 全球能源互联网研究院有限公司 | A kind of on-load regulator transformer and Unified Power Flow control system |
| CN109038606B (en) * | 2018-08-08 | 2024-04-02 | 全球能源互联网研究院有限公司 | On-load voltage regulating transformer and unified power flow control system |
| CN110518845A (en) * | 2019-07-30 | 2019-11-29 | 广州供电局有限公司 | On-load tap-changer of transformer |
| CN112636244A (en) * | 2020-12-11 | 2021-04-09 | 国网湖南省电力有限公司 | Design method of dancing-eliminating and ice-melting transformer with wide voltage regulation and fine current regulation |
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