CN106803675A - Three-phase distribution circuit automatic regulating voltage method of the no-flashy-flow without electric arc gear shift - Google Patents
Three-phase distribution circuit automatic regulating voltage method of the no-flashy-flow without electric arc gear shift Download PDFInfo
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- CN106803675A CN106803675A CN201510837681.1A CN201510837681A CN106803675A CN 106803675 A CN106803675 A CN 106803675A CN 201510837681 A CN201510837681 A CN 201510837681A CN 106803675 A CN106803675 A CN 106803675A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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Abstract
Three-phase distribution circuit automatic regulating voltage method of the no-flashy-flow without electric arc gear shift, it is characterized by：Each in three-phase distribution line input mutually accesses 3-phase autotransformer, goes back access controller and three-phase load ratio bridging switch.Easily cause the electric arc that shoves when band carries switching pressure regulation gear instant invention overcomes adjustable transformer in the market, easily to being impacted with electric loading or causing electrical equipment to restart, the phenomenon of high-power resistance reduction switching electric current influence need to be bridged, a kind of no-flashy-flow is realized, without electric arc pressure regulation gear switch.
Description
Technical field
The invention belongs to electrical engineering field, it is related to a kind of three-phase distribution circuit automatic regulating voltage method, the method is applicable
In mesolow distribution line.
Background technology
With the development that China's urban and rural economies are built, the electric load of power distribution network is presented the situation of rapid growth, particularly
The a large amount of of the combination area of city and country, household electrical appliance or farm equipment use, processing workshop, the substantial increase in business paving, cause electricity consumption
Amount steeply rises, and adds part distribution line and arranges unreasonable, and circuit is long, and line footpath is meticulous, causes line impedance to increase, and makes to match somebody with somebody
Electric line posterior segment low voltage, has had a strong impact on the production and operating activities and daily life of user.In addition, part distribution line
Load is larger with season or day-night change, low when high when causing voltage, rate of qualified voltage reduction, influences the safe operation of power network.
The present invention designs a kind of distribution line automatic voltage regulator for the too low problem of part distribution circuit electric voltage qualification rate, using
Out-primary sets multi-tap pressure regulation gear, the auto-transformer configuration of secondary coil series connection distribution line input/output terminal,
When pressure regulation gear is switched, after armature winding first disconnects input voltage and self closure, then switch pressure regulation gear, realize no swell
Flow, switch voltage regulation function without electric arc, voltage is adjusted to Eligibility requirements, meet electric power netting safe running requirement.Simultaneously, it is ensured that distribution
Circuit band can continuously power when carrying switching pressure regulation gear, not to being impacted with electric loading or causing electrical equipment to restart.
The content of the invention
The purpose of the present invention is to design a kind of no-flashy-flow, the distribution line three-phase automatic regulating voltage method without electric arc gear shift, with
Solve the part distribution line too high or too low problem of user terminal three-phase voltage.Very big, the triple line suitable for three-phase voltage undulating value
The very low or too high distribution line of road posterior segment voltage.The innovation point be overcome in the market adjustable transformer in band
Easily cause the electric arc that shoves when carrying switching pressure regulation gear, easily to being impacted with electric loading or causing electrical equipment to restart,
The phenomenon of high-power resistance reduction switching electric current influence need to be bridged, a kind of no-flashy-flow is realized, without electric arc pressure regulation gear switch.
The object of the present invention is achieved like this：Three-phase distribution circuit automatic regulating voltage method of the no-flashy-flow without electric arc gear shift,
It is characterized by：Each in three-phase distribution line input mutually accesses 3-phase autotransformer, and going back access controller and three-phase has load
Shunting switch, described 3-phase autotransformer includes the series connection output winding of three-phase and the voltage regulation coil in parallel of three-phase；It connects
Entering mode is：The voltage regulation coil that is respectively in parallel is attempted by each phase input of distribution line as armature winding, with more than one tune
Pressure tap gear；The output winding that is respectively in series is connected between distribution line input/output terminal as secondary windings, its Same Name of Ends
Direction makes each phase output terminal voltage that needs are raised and lowered and connects according to self coupling induced voltage, the voltage regulation coil in parallel of each phase with
Self coupling connecting and disconnecting are carried out by shunting switch between series connection output winding, the voltage regulation coil in parallel of each phase passes through shunting switch
Carry out self connection closure and form loop, the above two of shunting switch connects and composes interlocked relationship；Respectively be in parallel voltage regulation coil
Multiple tap changer gears each correspond to and be serially connected with shunting switch and carry out connecting and disconnecting, and one can only be connected every time take out
First gear position, forms interlocked relationship；The three-phase load ratio bridging switch, is the multiple switch combination with interlock function, each phase
Construction of switch all same is simultaneously each independent, is respectively in parallel between voltage regulation coil and corresponding series connection output winding by shunting switch certainly
Coupling connecting and disconnecting, the voltage regulation coil that is in parallel self connects closure and forms loop by shunting switch, and two kinds connect and compose
Interlocking, the voltage regulation coil tap changer gear that is respectively in parallel is by shunting switch connecting and disconnecting, and synchronization can only connect it
In a tap gear, other tap gears disconnect, formed interlocking；The each group switch of shunting switch is respectively connected with correspondence drive
Motor type relay, by controller drive module output drive signal to corresponding driving relay, is started by driving relay
Corresponding switch connection or disconnection；The regulator controller includes that microprocessor unit, three-phase voltage sampling module, three-phase are adjusted
Pressure drive module, wherein three-phase voltage sampling module are connected input three-phase voltage sampled data, three with microprocessor input pin
Phase pressure regulation drive module is connected output drive signal with microprocessor output pin, and specific implementation pressure regulation is solidified with microprocessor
The embedded control software of scheme, receives and pressure regulation driving operation for controlling three-phase voltage to sample.Controller sets three-phase electricity
Pressure sampling, further according to the voltage sample of each phase, by controller and three-phase load ratio bridging switch voltage regulation coil in parallel tap
Upper acquisition desired voltage.
Controller pressure regulation software flow is：" beginning " enters " sampling A phase voltages " afterwards, subsequently into " whether A phase voltages
Upper limit difference is allowed more than reference voltage ", it is to be directly entered " the selected pressure regulation gear closest to reference voltage ", otherwise enter
" whether A phase voltages allow lower limit difference less than reference voltage ", is to be directly entered " the selected pressure regulation closest to reference voltage
Gear ", otherwise A phase voltages allow upper limit difference and allow lower limit difference more than reference voltage less than reference voltage, then enter
" sampling B phase voltages ", into after " the selected pressure regulation gear closest to reference voltage ", enters back into and " sends out drive signal to be adjusted to A phases
Pressure drive module, disconnects the connecting valve between voltage regulation coil in parallel and output winding of connecting ", enter back into " hair drive signal
A phase pressure regulation drive modules are given, voltage regulation coil connecting to neutral in parallel is connected and is switched to be formed without foreign voltage input closed-loop path, constitute electricity
Current transformer structure ", then, into " hair drive signal gives A phase pressure regulation drive modules, disconnects the A voltage regulation coils that are in parallel and connected originally
The pressure regulation gear for connecing ", into " hair drive signal gives A phase pressure regulation drive modules, connects A and is in parallel the newly selected tune of voltage regulation coil
Pressure gear ", into " hair drive signal gives A phase pressure regulation drive modules, disconnects voltage regulation coil connecting to neutral switch closures in parallel ", enters
Enter " hair drive signal gives A phase pressure regulation drive modules, the connecting valve connected between voltage regulation coil in parallel and output winding of connecting,
Reconstitute auto-transformer configuration ", subsequently into " sampling B phase voltages ", into " whether B phase voltages permit more than reference voltage
Perhaps upper limit difference ", is to be directly entered " the selected pressure regulation gear closest to reference voltage ", otherwise into " whether B phase voltages
Lower limit difference is allowed less than reference voltage ", it is to be directly entered " the selected pressure regulation gear closest to reference voltage ", otherwise B phases
Voltage allows upper limit difference and allows lower limit difference more than reference voltage less than reference voltage, then into " sampling C phase voltages ",
Into after " the selected pressure regulation gear closest to reference voltage ", enter back into and " send out drive signal and give B phase pressure regulation drive modules, disconnect
Connecting valve between voltage regulation coil in parallel and output winding of connecting ", enters back into and " sends out drive signal and drive mould to the pressure regulation of B phases
Block, connects voltage regulation coil connecting to neutral in parallel and switchs to be formed without foreign voltage input closed-loop path, constitutes current transformer structure ", connect
, into " hair drive signal gives B phase pressure regulation drive modules, disconnects B and is in parallel the pressure regulation gear of voltage regulation coil connection originally ", enter
Enter " hair drive signal gives B phase pressure regulation drive modules, connects B and is in parallel the newly selected pressure regulation gear of voltage regulation coil ", into " hair drives
Dynamic signal gives B phase pressure regulation drive modules, disconnects voltage regulation coil connecting to neutral switch closures in parallel ", into " hair drive signal is to B
Phase pressure regulation drive module, the connecting valve connected between voltage regulation coil in parallel and output winding of connecting, reconstitutes self coupling transformation
Device structure ", subsequently into " sampling C phase voltages ", subsequently into " whether C phase voltages are more than reference voltage permission upper limit difference ",
It is to be directly entered " the selected pressure regulation gear closest to reference voltage ", otherwise into " whether C phase voltages are less than reference voltage
Allow lower limit difference ", it is to be directly entered " the selected pressure regulation gear closest to reference voltage ", otherwise C phase voltages are less than benchmark
Voltage allows upper limit difference and allows lower limit difference more than reference voltage, then " sampling A phase voltages " is backed into, into " choosing
After the fixed pressure regulation gear closest to reference voltage ", enter back into and " send out drive signal and give C phase pressure regulation drive modules, disconnect and joint debugging
Connecting valve between line ball circle and output winding of connecting ", enters back into and " sends out drive signal and give C phase pressure regulation drive modules, connect
Logical parallel connection voltage regulation coil connecting to neutral is switched to be formed and is input into closed-loop path without foreign voltage, constitutes current transformer structure ", then, enter
Enter " hair drive signal gives C phase pressure regulation drive modules, disconnects C and is in parallel the pressure regulation gear of voltage regulation coil connection originally ", into " hair
Drive signal gives C phase pressure regulation drive modules, connects C and is in parallel the newly selected pressure regulation gear of voltage regulation coil ", into " hair drives letter
Number C phase pressure regulation drive modules are given, disconnect voltage regulation coil connecting to neutral switch closures in parallel ", into " hair drive signal is adjusted to C phases
Pressure drive module, the connecting valve connected between voltage regulation coil in parallel and output winding of connecting, reconstitutes auto-transformer knot
Structure ", returns again to " sampling A phase voltages ".
The present invention for taking above measure, with following good effect：
1. multi-tap gear is set using in distribution line input parallel connection voltage regulation coil, by switching distribution line input simultaneously
Join voltage regulation coil gear to change no-load voltage ratio between voltage regulation coil in parallel and output winding of connecting, produced self coupling induced electricity buckling
Change is superimposed to form distribution line output end voltage with distribution line input terminal voltage, realizes pressing the gear in distribution line output end
Adjust the purpose of voltage.Because transformer is in the case where equal-wattage is transmitted, if input terminal voltage is higher, electric current is smaller,
Therefore the tap gear of voltage regulation coil in parallel is set in distribution line input, is shoved generation without transition during switching.
2nd, auto-transformer is using a kind of unique structure：By the switch combination with interlock function, realize and joint debugging
Line ball circle and output winding of connecting it is separated when, voltage regulation coil in parallel self closure forms loop, constitutes current transformer knot
Structure, at this moment, voltage regulation coil in parallel is in short-circuit condition, and is disconnected with distribution line input, without foreign voltage input, is equivalent to
Current Transformer Secondary side, carries out tap gear switch to series voltage-regulating coil in this case, will not be toward distribution line
Injection is shoved or causes electric arc, and the electric capacity added in voltage regulation coil in parallel parallel connection can shove to the electric current of residual and suppress, from
And realize the Arc-free tap gear switch of no-flashy-flow.Make auto-transformer during pressure regulation gear switch in current transformer structure shape
Carried out under state, the electric arc that shoves that can effectively produced by cancellation band voltage adjustment of on-load, reduce the infringement of tapping switch contact, extension switch
Break-make service life, makes the work of automatic voltage regulator become more stable reliability.
3rd, series connection output winding is connected between distribution line input and output, when current transformer structure is constituted, distribution
Circuit keeps straight-through, flows only through line current, is produced without self coupling induced voltage, and equivalent to current transformer primary side, voltage is defeated
Go out and be held essentially constant with input, the electrical load operation for connecting below is unaffected.Ensure that distribution line band carries switching pressure regulation
Can continuously be powered during gear, not to being impacted with electric loading or causing electrical equipment to restart.
In conjunction with drawings and Examples, the present invention is described in further detail below.
Brief description of the drawings
Accompanying drawing 1 is general function structure chart of the invention；
Accompanying drawing 2 is controller architecture functional-block diagram；
Accompanying drawing 3 is microprocessor unit circuit figure；
Accompanying drawing 4 is three-phase voltage sample circuit figure；
Accompanying drawing 5 is three phase voltage regulating drive module circuit diagram；
Accompanying drawing 6 is controller pressure regulation software flow pattern.
The description of reference numerals of accompanying drawing 6：
1st, whether A phase voltages allow upper limit difference more than reference voltage；
2nd, whether A phase voltages allow lower limit difference less than reference voltage；
3rd, the pressure regulation gear closest to reference voltage is selected；
4th, hair drive signal gives A phase pressure regulation drive modules, disconnects voltage regulation coil in parallel and is opened with the connection between output winding of connecting
Close；
5th, hair drive signal gives A phase pressure regulation drive modules, connects voltage regulation coil connecting to neutral in parallel and switchs to be formed without foreign voltage input
Closed-loop path, constitutes current transformer structure；
6th, hair drive signal gives A phase pressure regulation drive modules, disconnects A and is in parallel the pressure regulation gear of voltage regulation coil connection originally；
7th, hair drive signal gives A phase pressure regulation drive modules, connects A and is in parallel the newly selected pressure regulation gear of voltage regulation coil；
8th, hair drive signal gives A phase pressure regulation drive modules, disconnects voltage regulation coil connecting to neutral switch closures in parallel；
9th, hair drive signal gives A phase pressure regulation drive modules, connects voltage regulation coil in parallel and is opened with the connection between output winding of connecting
Close, reconstitute auto-transformer configuration；
10th, whether B phase voltages allow upper limit difference more than reference voltage；
11st, whether B phase voltages allow lower limit difference less than reference voltage；
12nd, the pressure regulation gear closest to reference voltage is selected；
13rd, hair drive signal gives B phase pressure regulation drive modules, disconnects the connection between voltage regulation coil in parallel and output winding of connecting
Switch；
14th, hair drive signal gives B phase pressure regulation drive modules, connects voltage regulation coil connecting to neutral in parallel and switchs to form defeated without foreign voltage
Enter closed-loop path, constitute current transformer structure；
15th, hair drive signal gives B phase pressure regulation drive modules, disconnects B and is in parallel the pressure regulation gear of voltage regulation coil connection originally；
16th, hair drive signal gives B phase pressure regulation drive modules, connects B and is in parallel the newly selected pressure regulation gear of voltage regulation coil；
17th, hair drive signal gives B phase pressure regulation drive modules, disconnects voltage regulation coil connecting to neutral switch closures in parallel；
18th, hair drive signal gives B phase pressure regulation drive modules, connects voltage regulation coil in parallel and is opened with the connection between output winding of connecting
Close, reconstitute auto-transformer configuration；
19th, whether C phase voltages allow upper limit difference more than reference voltage；
20th, whether C phase voltages allow lower limit difference less than reference voltage；
21st, the pressure regulation gear closest to reference voltage is selected；
22nd, hair drive signal gives C phase pressure regulation drive modules, disconnects the connection between voltage regulation coil in parallel and output winding of connecting
Switch；
23rd, hair drive signal gives C phase pressure regulation drive modules, connects voltage regulation coil connecting to neutral in parallel and switchs to form defeated without foreign voltage
Enter closed-loop path, constitute current transformer structure；
24th, hair drive signal gives C phase pressure regulation drive modules, disconnects C and is in parallel the pressure regulation gear of voltage regulation coil connection originally；
25th, hair drive signal gives C phase pressure regulation drive modules, connects C and is in parallel the newly selected pressure regulation gear of voltage regulation coil；
26th, hair drive signal gives C phase pressure regulation drive modules, disconnects voltage regulation coil connecting to neutral switch closures in parallel；
27th, hair drive signal gives C phase pressure regulation drive modules, connects voltage regulation coil in parallel and is opened with the connection between output winding of connecting
Close, reconstitute auto-transformer configuration.
Specific embodiment
Three-phase distribution circuit automatic Regulation equipment of the no-flashy-flow without electric arc gear shift, it is characterized by：Including three-phase self coupling transformation
Device, controller, three-phase load ratio bridging switch, described 3-phase autotransformer include the series connection output winding of three-phase and three-phase
Voltage regulation coil in parallel；Series connection output winding one end of each phase connects each phase of distribution line input, the other end and distribution wire respectively
Road input is respectively connected, and self coupling connection is carried out by shunting switch between the voltage regulation coil in parallel and output winding of connecting of each phase
With disconnection, voltage regulation coil in parallel self connects closure and forms loop by shunting switch, and two kinds connect and compose interlocking, and each phase is simultaneously
Connection voltage regulation coil tap changer gear is by shunting switch connecting and disconnecting, and synchronization can only connect one of tap shelves
Position, other tap gears disconnect, and form interlocking；The three-phase voltage of controller is sampled, and input is each with distribution line output end to be connected
Connect, the pressure regulation drive output of controller is respectively connected with three-phase load ratio bridging switch, and corresponding shunting switch is connected respectively；Three
Respectively switch connects each tap changer gear of voltage regulation coil in parallel for connecting and disconnecting to phase load ratio bridging switch respectively, and connection is simultaneously
It is used for self coupling connecting and disconnecting between connection voltage regulation coil and output winding of connecting.
Accompanying drawing 1 is general function structure chart of the invention, refer to the attached drawing 1.
The function of 1 pair of distribution line three-phase automatic voltage regulator is described in further detail below in conjunction with the accompanying drawings.This pressure regulator bag
Include 3-phase autotransformer, three-phase load ratio bridging switch and the part of voltage regulator controllers three.Wherein, the 3-phase autotransformer category
It is each by voltage regulation coil in parallel, series connection output winding composition, three-phase structure and work(in a kind of self coupling series voltage-regulating transformer
Can be identical.This example describes the function of auto-transformer, B phases, the work(of C facies units in detail by taking auto-transformer A facies units as an example
Can be identical with A phases.A be in parallel voltage regulation coil be auto-transformer public winding, be attempted by transformer inputs as primary
Winding, can be set multiple tap, and this example is 3 coils of tap, by the load ratio bridging switch K with interlock function1A、
K2A、K3AA gear in 3 tap gears is connected respectively.The A output windings that are in series are connected on distribution wire as secondary windings
Between the A phase input and output of road, self coupling induced voltage is produced, when series connection output winding Same Name of Ends presses voltage rising direction concatenation, tool
There is boost function, when being concatenated by voltage reduction direction, with buck functionality.Load ratio bridging switch K1A、K2A、K3AConnection A is in parallel
During the different gears of voltage regulation coil, the no-load voltage ratio that A is in parallel voltage regulation coil and A is in series between output winding can be made to produce change,
Produced self coupling induced voltage connects to form different output end voltages from distribution line A phase input voltages, reaches distribution wire
Road A phase output terminals are by different gear booster tensions or the purpose of reduction voltage.For example, to connect K1AThe A at place is in parallel pressure regulation
During coil gear pressure regulation, first by interlock switch K0A2 ends are got to by 1 end, at this moment, A is in parallel voltage regulation coil and output winding of connecting
It is separated, without external input voltage, self closure forms loop to voltage regulation coil in parallel, constitutes current transformer structure, in parallel
Voltage regulation coil, in order to further reduce the issuable transition current of connection, is in parallel equivalent to Current Transformer Secondary side in A
Voltage regulation coil is connected in parallel with a capacitor CA, harmonic carcellation can be played a part of and shoved.At this moment, distribution line input and output are connected on
Between the A output windings that are in series do not produce self coupling voltage, distribution line keeps straight-through, line current is flowed only through, equivalent to electricity
Current transformer primary side, distribution circuit electric voltage output is held essentially constant with input, and the normal operation for loading below is not influenceed.So
Afterwards, by the load ratio bridging switch with interlock function, K is controlled1AClosure, K2A、K3ADisconnect, the switching A voltage regulation coils that are in parallel are arrived
K1AThe gear at place, realizes the adjustment of pressure regulation gear.After again, by interlock switch K0AReturned to 1 end by 2 ends, at this moment, A is in parallel
Voltage regulation coil and A are in series between output winding and reclose, and self closed-loop path of voltage regulation coil in parallel disconnects, reconstitute from
Coupling transformer device structure, the K of new adjustment1APlace parallel connection voltage regulation coil gear turns into armature winding, voltage regulation coil in parallel with connect it is defeated
The no-load voltage ratio gone out between coil changes, self coupling induced voltage and distribution line A phase inputs produced by series connection output winding
Voltage superposition obtains A phase output terminal voltages, reaches the purpose that voltage is adjusted by the gear.
Three-phase load ratio bridging switch, is the switch combination with interlock function, and the construction of switch all same of each phase is simultaneously each
From independence, it is possible to use A.C. contactor switch, combination switch or other have and automatically control the electric load that is switched on or switched off
Switch, the function of 1 pair of distribution line three-phase load ratio bridging switch is described in further detail below in conjunction with the accompanying drawings.Tapped out with A phases
As a example by pass, K0ALoop is formed for connection between voltage regulation coil in parallel and output winding of connecting and voltage regulation coil in parallel are closed self
Switch combination, this example A be in parallel voltage regulation coil set 3 tap gears, K1A、K2A、K3AFor each tap gear of correspondence is connected
Switch, by corresponding relay driving break-make, relay drive circuit is connected with microprocessor A phase pressure regulation drive modules.For example,
Switch and be connected to K1AThe A at place is in parallel voltage regulation coil gear when carrying out pressure regulation, is sent out by microprocessor A phase pressure regulation drive module
Drive signal to relay drive circuit is sent, first by interlock switch K0A2 ends are got to by 1 end, at this moment, A be in parallel voltage regulation coil with
Separated, self loop of the closure formation without foreign voltage of voltage regulation coil in parallel of series connection output winding, constitutes current transformer
Structure, equivalent to Current Transformer Secondary side, the A output windings that are in series are connected between distribution line input and output, distribution wire
Road keeps straight-through, flows only through line current, is produced without self coupling induced voltage, equivalent to current transformer primary side, distribution line
Voltage output is held essentially constant with input, and the normal operation for loading below is not influenceed.Then, driven by the pressure regulation of microprocessor A phases
Dynamic model block sends drive signal to relay drive circuit, controls K1AClosure, K2A、K3ADisconnect, switching A is in parallel voltage regulation coil
To K1AThe gear at place, realizes the adjustment of pressure regulation gear.After again, drive signal is sent by microprocessor A phase pressure regulation drive module
To relay drive circuit, by interlock switch K0AReturned to 1 end by 2 ends, at this moment, be in parallel voltage regulation coil and A of A is in series output
Reclosed between coil, self closed-loop path of voltage regulation coil in parallel disconnects, and reconstitutes auto-transformer configuration, and will newly adjust
Whole K1APlace parallel connection voltage regulation coil gear as primary winding, by voltage regulation coil in parallel with connect output winding it
Between Turn Ratio Changing produced by self coupling induced voltage, reach distribution line A phase output terminals by the gear adjust voltage purpose.
Accompanying drawing 2 is controller architecture functional-block diagram.Refer to the attached drawing 2.
Described controller includes：Microprocessor unit, A phase voltages sampling module, B phase voltages sampling module, C phase voltages
Sampling module, A phase pressure regulation drive module, B phase pressure regulation drive module, C phase pressure regulation drive modules, wherein A phase voltages sampling module,
B phase voltages sampling module, C phase voltage sampling module structure functions are identical, are connected with microprocessor input pin respectively, A
Phase pressure regulation drive module, B phase pressure regulation drive module, C phase pressure regulation drive module structure functions are identical, are exported with microprocessor
Pin is connected, and the embedded control software of specific implementation pressure regulation scheme is solidified with microprocessor, for controlling three-phase voltage number
Received according to sampling and pressure regulation drives.
Below in conjunction with accompanying drawing 2, accompanying drawing 3, accompanying drawing 4, accompanying drawing 5, accompanying drawing 6 in detail, controller is described in detail by taking A phase Regulation Controls as an example
Function, B phases, C phase Regulation Control functions are identical with A phases.A phase voltages sampling module is changed by voltage analog input block, A/D
Unit is constituted, and A phase voltages are believed through the voltage transformer translation circuit scaling transformation of voltage analog input block into low-voltage
Number, being arranged into voltage signal amplifying circuit turns into normal low voltage signal, and data signal is become for micro- via A/D change-over circuits
Processor is sampled.A phase pressure regulation drive module is used to for the pressure regulation drive signal that microprocessor is exported to carry out power amplification, drives electricity
Whole shunting switch combination of road corresponding A phase, power amplification is carried out by by drive signal, and A phases are driven by relay correspondence
Each switch motion of load ratio bridging switch.Its workflow is：Micro processor loop sampling three-phase voltage, is sampling A phases
During voltage, sampled value is compared with the reference voltage of setting, if in reference voltage bound difference range, not sending out control life
Order, continues circulating sampling three-phase voltage successively.If A phase samplers voltage exceedes the upper limit difference that reference voltage is allowed, or less than base
The lower limit difference that quasi- voltage is allowed, then select A and be in parallel voltage regulation coil voltage regulation result closest to the pressure regulation gear of reference voltage, so
Regulation Control operation is performed afterwards, and microprocessor first sends out drive signal through A phase pressure regulation drive module power amplifications, drives relay to break
The connecting valve that A is in parallel voltage regulation coil and A is in series between output winding is opened, drive signal is then sent out through power amplification, driven
Motor type relay forms without foreign voltage input circuit the be in parallel connecting to neutral switch closures of voltage regulation coil of A, constitutes current transformer
Structure, then sends out drive signal through power amplification, drives relay to disconnect A and is in parallel the pressure regulation shelves of voltage regulation coil connection originally
Position, then send out drive signal through power amplification, drives relay to connect A and is in parallel the newly selected pressure regulation gear of voltage regulation coil, reaches
Pressure regulation gear switch purpose.Then hair drive signal is through power amplification, drives relay to disconnect A and is in parallel the connecting to neutral of voltage regulation coil
Switching circuitry, recloses the connection that A is in parallel between voltage regulation coil and output winding of connecting, and reconstitutes auto-transformer knot
Structure, realizes the adjustment of pressure regulation gear.
3-phase autotransformer, belongs to a kind of self coupling series voltage-regulating transformer, and the transformer uses a kind of such structure,
Constituted per by each independent voltage regulation coil in parallel, series connection output winding.Wherein, voltage regulation coil in parallel is auto-transformer
Public winding, be attempted by transformer inputs as armature winding, produce alternating electromagnetic field, voltage regulation coil in parallel is more than one
The coil of individual tap gear, pressure regulation is carried out by the different gears for switching the coil.Series connection output winding is used as secondary windings string
It is associated between distribution line input/output terminal, produces self coupling induced voltage, according to the difference of series connection output winding extreme direction of the same name,
Can heighten or turn down output end voltage.The switch combination of all pressure regulation operations, is arranged at voltage regulation coil in parallel, series connection output
Coil switches on and off action without switch combination, a series of by automatic control switch combination, and switching voltage regulation coil in parallel is not
With tap gear, the no-load voltage ratio between voltage regulation coil in parallel and output winding of connecting is produced change, reach distribution line output end
The purpose of voltage is lifted or reduced by different gears.3-phase autotransformer is per mutually using a kind of unique structure：By tool
Self coupling connection and disconnection between voltage regulation coil in parallel and output winding of connecting are realized in the switch combination for having interlock function, and simultaneously
When self coupling disconnects between connection voltage regulation coil and output winding of connecting, automatic self closure of voltage regulation coil in parallel forms loop, simultaneously
When self coupling is connected between connection voltage regulation coil and output winding of connecting, voltage regulation coil closed-loop path in parallel disconnects automatically.Using so
A kind of structure after, when to carry out pressure regulation to a certain phase of distribution line, first disconnect voltage regulation coil in parallel and output winding of connecting
Between self coupling connection, at this moment, voltage regulation coil in parallel and distribution line input disconnect, and self closure forms loop, constitutes electricity
Current transformer.Voltage regulation coil in parallel is in the near short circuit state of no-voltage input, equivalent to Current Transformer Secondary side, series connection
Output winding is produced without self coupling induced voltage, and distribution line input/output terminal keeps straight-through, flows only through line current, voltage output
It is held essentially constant, Voltage Drop or flickering will not be produced, be not in shove and electric arc, the load behind output end is not produced
Raw influence, equivalent to current transformer primary side.So, voltage regulation coil in parallel is disconnected in the case that self coupling is connected by constituting
Current transformer structure, the voltage stabilization and no-flashy-flow for maintaining distribution output end is produced without electric arc.Then, by with interlocking
The load ratio bridging switch difference contact of function, switching voltage regulation coil tap gear in parallel realizes the adjustment of voltage gear, switches
Journey is in the closure state without external input voltage due to voltage regulation coil in parallel, does not produce shoving and electricity for influence distribution output end
Arc.After the completion of switching action, self coupling connection is reclosed between voltage regulation coil in parallel and output winding of connecting, voltage regulation coil in parallel
Self closed-loop path simultaneously switches off, and again as auto-transformer configuration, at this moment, voltage regulation coil in parallel is by the new tap shelves for adjusting
Position turns into primary winding, and the self coupling induced voltage produced by series connection output winding is reached by the Turn Ratio Changing after adjustment
Distribution line output end is by different gear booster tensions or the purpose of reduction voltage.Three-phase load ratio bridging switch, is with interlocking
The switch combination of function, the construction of switch all same of each phase is simultaneously each independent.Can be switched using A.C. contactor, be combined and open
Close or other have and automatically control the power load switch that is switched on or switched off, for voltage regulation coil in parallel with connect output winding it
Between self coupling connection when disconnecting, voltage regulation coil in parallel self closure forms loop, constitutes current transformer structure；For simultaneously joint debugging
When self coupling connection recovers to connect between line ball circle and output winding of connecting, self closed-loop path of voltage regulation coil in parallel disconnects, and constitutes
Auto-transformer configuration；For constituting during current transformer structure, on-off is connect in self closed-loop path of voltage regulation coil in parallel
Different taps are opened, the adjustment of voltage gear is realized.The each group switch of shunting switch is respectively connected with correspondence and drives relay, leads to
Controller drive module output drive signal is crossed to corresponding driving relay, corresponding switch is started by driving relay and is connect
On-off is opened.The regulator controller is constituted using single chip machine controlling circuit, including：Microprocessor unit, three-phase voltage are adopted
Egf block, three phase voltage regulating drive module, wherein：Three-phase voltage sampling module is connected with microprocessor input pin, samples respectively
Each phase voltage numerical value, three phase voltage regulating drive module is connected with microprocessor output pin, each phase pressure regulation is exported respectively and drives letter
Number.The embedded control software of specific implementation pressure regulation scheme is solidified with microprocessor, is received for controlling three-phase voltage to sample
Operated with pressure regulation.Microprocessor sequentially circulating sampling three-phase voltage, a certain reference voltage value with setting compares, if a certain phase is adopted
Sample voltage then sends control command, by three phase voltage regulating drive module more than reference voltage and more than upper limit difference range is allowed
Drive control drives wherein a certain phase load ratio bridging switch action switching to the step-down gear of the voltage regulation coil that should be in parallel, and makes this
The no-load voltage ratio being in parallel between voltage regulation coil and output winding of connecting diminishes, and reaches the purpose for reducing a certain phase voltage；If a certain phase
Sampled voltage then sends control command less than reference voltage and more than lower limit difference range is allowed, and mould is driven by three phase voltage regulating
Block drive control drives wherein a certain phase load ratio bridging switch action switching to the boosting gear of the voltage regulation coil that should be in parallel, and makes
The no-load voltage ratio that this is in parallel between voltage regulation coil and output winding of connecting becomes big, reaches the purpose for lifting a certain phase voltage.
When each phase shunting switch combination of a certain phase voltage drive control is sequentially turned-on and disconnects, self coupling transformation is alternately constituted
Device structure or current transformer structure, switching voltage regulation coil difference tap in parallel, reach the purpose of adjustment voltage.
Claims (2)
1. three-phase distribution circuit automatic regulating voltage method of the no-flashy-flow without electric arc gear shift, it is characterized by：In the input of three-phase distribution circuit
The each of end mutually accesses 3-phase autotransformer, goes back access controller and three-phase load ratio bridging switch, described three-phase self coupling transformation
Device includes the series connection output winding of three-phase and the voltage regulation coil in parallel of three-phase；Its access way is：Voltage regulation coil be respectively in parallel simultaneously
Each phase input of distribution line is connected on as armature winding, with more than one tap changer gear；Respectively be in series output winding
It is connected between distribution line input/output terminal as secondary windings, its extreme direction of the same name makes each mutually defeated according to self coupling induced voltage
Go out terminal voltage needs to be raised and lowered and connects, shunting switch is passed through between the voltage regulation coil in parallel and output winding of connecting of each phase
Self coupling connecting and disconnecting are carried out, the voltage regulation coil in parallel of each phase carries out self connection closure and forms loop by shunting switch, point
The above two for connecing switch connects and composes interlocked relationship；The multiple tap changer gears of voltage regulation coil of being respectively in parallel each are corresponded to
Being serially connected with shunting switch carries out connecting and disconnecting, and can only connect a tap gear every time, forms interlocked relationship；The three-phase
Load ratio bridging switch, is the multiple switch combination with interlock function, and the construction of switch all same of each phase is simultaneously each independent, each phase
By shunting switch self coupling connecting and disconnecting, the voltage regulation coil that is in parallel between voltage regulation coil in parallel and corresponding series connection output winding
Closure self is connected by shunting switch and forms loop, and two kinds connect and compose interlocking, be respectively in parallel voltage regulation coil tap changer
Gear is by shunting switch connecting and disconnecting, and synchronization can only connect one of tap gear, and other tap gears break
Open, form interlocking；The each group switch of shunting switch is respectively connected with correspondence and drives relay, defeated by controller drive module
Go out drive signal to corresponding driving relay, corresponding switch connection or disconnection are started by driving relay；The pressure regulation
Device controller includes microprocessor unit, three-phase voltage sampling module, three phase voltage regulating drive module, wherein three-phase voltage sampling mould
Block is connected input three-phase voltage sampled data, three phase voltage regulating drive module and microprocessor efferent duct with microprocessor input pin
Pin connects output drive signal, the embedded control software of specific implementation pressure regulation scheme is solidified with microprocessor, for controlling
Three-phase voltage sampling is received and pressure regulation drives operation；Controller sets three-phase voltage sampling, further according to the voltage sample of each phase, leads to
Cross controller and three-phase load ratio bridging switch obtains desired voltage in the tap of voltage regulation coil in parallel.
2. three-phase distribution circuit automatic regulating voltage method according to claim 1, it is characterized by：Controller pressure regulation software flow
For：" beginning " enters " sampling A phase voltages " afterwards, subsequently into " whether A phase voltages are more than reference voltage permission upper limit difference ",
It is to be directly entered " the selected pressure regulation gear closest to reference voltage ", otherwise into " whether A phase voltages are less than reference voltage
Allow lower limit difference ", it is to be directly entered " the selected pressure regulation gear closest to reference voltage ", otherwise A phase voltages are less than benchmark
Voltage allows upper limit difference and allows lower limit difference more than reference voltage, then into " sampling B phase voltages ", into " selected most
Close to the pressure regulation gear of reference voltage " after, enter back into and " send out drive signal and give A phase pressure regulation drive modules, disconnect line pressure regulator in parallel
Circle and the connecting valve between output winding of connecting ", enters back into and " sends out drive signal and give A phase pressure regulation drive modules, connect simultaneously
Connection voltage regulation coil connecting to neutral is switched to be formed and is input into closed-loop path without foreign voltage, constitutes current transformer structure ", then, into " hair
Drive signal gives A phase pressure regulation drive modules, disconnects A and is in parallel the pressure regulation gear of voltage regulation coil connection originally ", into " hair drives
Signal gives A phase pressure regulation drive modules, connects A and is in parallel the newly selected pressure regulation gear of voltage regulation coil ", into " hair drive signal is to A
Phase pressure regulation drive module, disconnects voltage regulation coil connecting to neutral switch closures in parallel ", into " hair drive signal drives to the pressure regulation of A phases
Module, the connecting valve connected between voltage regulation coil in parallel and output winding of connecting, reconstitutes auto-transformer configuration ", so
Enter " sampling B phase voltages " afterwards, be to be directly entered into " whether B phase voltages are more than reference voltage permission upper limit difference "
" the selected pressure regulation gear closest to reference voltage ", otherwise into " whether B phase voltages are poor less than reference voltage permission lower limit
Value ", is to be directly entered " the selected pressure regulation gear closest to reference voltage ", and otherwise B phase voltages are allowed less than reference voltage
Limit difference and lower limit difference is allowed more than reference voltage, then into " sampling C phase voltages ", into " selected closest to benchmark electricity
After the pressure regulation gear of pressure ", enter back into and " send out drive signal and give B phase pressure regulation drive modules, disconnect voltage regulation coil in parallel and output of connecting
Connecting valve between coil ", enters back into and " sends out drive signal and give B phase pressure regulation drive modules, connect voltage regulation coil connecting to neutral in parallel
Switch is formed and is input into closed-loop path without foreign voltage, constitutes current transformer structure ", then, into " hair drive signal gives B phases
Pressure regulation drive module, disconnect B be in parallel voltage regulation coil originally connection pressure regulation gear ", into " hair drive signal give B phase pressure regulation
Drive module, connects B and is in parallel the newly selected pressure regulation gear of voltage regulation coil ", into " hair drive signal drives mould to the pressure regulation of B phases
Block, disconnects voltage regulation coil connecting to neutral switch closures in parallel ", into " hair drive signal gives B phase pressure regulation drive modules, connects simultaneously
Connecting valve between connection voltage regulation coil and output winding of connecting, reconstitutes auto-transformer configuration ", subsequently into " sampling C
Phase voltage ", is to be directly entered " to select and most connect subsequently into " whether C phase voltages are more than reference voltage permission upper limit difference "
The pressure regulation gear of nearly reference voltage ", is then straight otherwise into " whether C phase voltages are less than reference voltage permission lower limit difference "
Tap into the pressure regulation gear of reference voltage " selected closest to ", otherwise C phase voltages less than reference voltage allow upper limit difference and
Lower limit difference is allowed more than reference voltage, then backs into " sampling A phase voltages ", into " the selected tune closest to reference voltage
After pressure gear ", enter back into and " send out drive signal and give C phase pressure regulation drive modules, disconnect voltage regulation coil in parallel and output winding of connecting
Between connecting valve ", enter back into that " hair drive signal gives C phase pressure regulation drive modules, connects voltage regulation coil connecting to neutral in parallel and opens
Close to be formed and be input into closed-loop path without foreign voltage, constitute current transformer structure ", then, into " hair drive signal is adjusted to C phases
Pressure drive module, disconnect C be in parallel voltage regulation coil originally connection pressure regulation gear ", into " hair drive signal give the pressure regulation of C phases drive
Dynamic model block, connects C and is in parallel the newly selected pressure regulation gear of voltage regulation coil ", into " hair drive signal gives C phase pressure regulation drive modules,
Disconnect voltage regulation coil connecting to neutral switch closures in parallel ", into " hair drive signal gives C phase pressure regulation drive modules, connects and joint debugging
Connecting valve between line ball circle and output winding of connecting, reconstitutes auto-transformer configuration ", return again to " sampling A phase electricity
Pressure ".
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| CN201510837681.1A CN106803675A (en) | 2015-11-26 | 2015-11-26 | Three-phase distribution circuit automatic regulating voltage method of the no-flashy-flow without electric arc gear shift |
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| CN201510837681.1A CN106803675A (en) | 2015-11-26 | 2015-11-26 | Three-phase distribution circuit automatic regulating voltage method of the no-flashy-flow without electric arc gear shift |
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| CN112186784A (en) * | 2019-07-04 | 2021-01-05 | 王振铎 | Three-phase voltage balancing device and method |
| CN112653140A (en) * | 2020-12-17 | 2021-04-13 | 深圳供电局有限公司 | Power supply control method, device and storage medium |
| CN116260436A (en) * | 2022-12-30 | 2023-06-13 | 合肥仙湖半导体科技有限公司 | Arc-discharge-free insulated three-phase switch and application circuit thereof |
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Application publication date: 20170606 |