CN105743096A - Inrush current-free and arc shifting-free power distribution line single-phase automatic voltage regulator - Google Patents
Inrush current-free and arc shifting-free power distribution line single-phase automatic voltage regulator Download PDFInfo
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- CN105743096A CN105743096A CN201510837896.3A CN201510837896A CN105743096A CN 105743096 A CN105743096 A CN 105743096A CN 201510837896 A CN201510837896 A CN 201510837896A CN 105743096 A CN105743096 A CN 105743096A
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- phase
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- distribution line
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
- H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
Abstract
The invention relates to an inrush current-free and arc shifting-free power distribution line single-phase automatic voltage regulator. The inrush current-free and arc shifting-free power distribution line single-phase automatic voltage regulator is characterized in that the inrush current-free and arc shifting-free power distribution line single-phase automatic voltage regulator includes a single-phase self-coupling transformer, a controller and a single-phase on-load tap-changer. With the inrush current-free and arc shifting-free power distribution line single-phase automatic voltage regulator adopted, no transition inrush current is generated in switching under the same power.
Description
Technical field
The invention belongs to electrical engineering field, relate to a kind of distribution line automatic voltage regulator, this pressure regulator is applicable to mesolow distribution line.
Background technology
Along with the development that China's urban and rural economies are built, the electric load of power distribution network presents a large amount of uses of the situation, the particularly combination area of city and country of quickly growth, household electrical appliance or farm equipment, add the substantial increase in workshop, business paving, causing that power consumption steeply rises, add that part distribution line is arranged unreasonable, circuit is long, wire diameter is meticulous, cause line impedance to increase, make distribution line posterior segment low voltage, have a strong impact on production and operating activities and the daily life of user.It addition, part distribution line load is relatively big with season or day-night change, low during height when causing voltage, rate of qualified voltage reduces, and affects the safe operation of electrical network.
Summary of the invention
It is an object of the invention to design a kind of no-flashy-flow, the single-phase automatic voltage regulator of distribution line without electric arc gear shift, to solve the part distribution line user side too high or too low problem of a certain phase voltage, it is achieved no-flashy-flow, without electric arc pressure regulation gear switch.
The object of the present invention is achieved like this: a kind of no-flashy-flow, the single-phase automatic voltage regulator of distribution line without electric arc gear shift, it is characterized by: include single-phase autotransformer, controller, single-phase load ratio bridging switch, described single-phase autotransformer includes single-phase series connection output winding and single-phase voltage regulation coil in parallel；Parallel single-phase voltage regulation coil is attempted by a certain phase input of distribution line as autotransformer armature winding, has more than one tap changer gear；Single-phase series output winding is connected between a certain phase input/output terminal of distribution line as autotransformer secondary windings, its Same Name of Ends direction makes this phase output terminal voltage raise according to self coupling induced voltage or reduces to need and connect, single-phase voltage regulation coil in parallel carries out self coupling connecting and disconnecting by shunting switch with connecting between output winding, single-phase voltage regulation coil in parallel carries out oneself by shunting switch and connects Guan Bi formation loop, and the above two of shunting switch connects and composes interlocked relationship；Multiple tap changer gears of parallel single-phase voltage regulation coil all each correspondence is serially connected with shunting switch and carries out connecting and disconnecting, and can only connect a tap gear every time, forms interlocked relationship；Described single-phase load ratio bridging switch, for having multiple switch combinations of interlock function, by shunting switch self coupling connecting and disconnecting between parallel single-phase voltage regulation coil with corresponding series connection output winding, this voltage regulation coil that is in parallel is connected Guan Bi by shunting switch oneself and is formed loop, and two kinds connect and compose interlocking, parallel single-phase voltage regulation coil tap changer gear passes through shunting switch connecting and disconnecting, and synchronization can only connect one of them tap gear, other tap gears disconnect, and form interlocking；Each group switch of shunting switch is all respectively connected with corresponding driving relay, drives module output drive signal to corresponding driving relay by controller, by the switch connection or the disconnection that drive relay to start correspondence；Described regulator controller includes microprocessor unit, single-phase voltage sampling module, single-phase voltage regulating driving module, wherein single-phase voltage sampling module is connected input single-phase voltage sample data with microprocessor input pin, single-phase voltage regulating drives module to be connected output drive signal with microprocessor output pin, it is solidified with the embedded Control software being embodied as pressure regulation scheme in microprocessor, is used for controlling single-phase voltage sampling and receives and pressure regulation driving operation.
Microprocessor adopts STM32F103.
Take the present invention of above measure, there is effect good as follows:
1. adopt the voltage regulation coil in parallel being attempted by distribution line a certain phase input as armature winding, it is connected on the auto-transformer configuration as secondary windings of the series connection output winding between a certain phase input/output terminal of distribution line, voltage regulation coil in parallel arranges multi-tap gear, voltage regulation coil in parallel and no-load voltage ratio between output winding of connecting is changed by switching the tap gear of voltage regulation coil in parallel, produced self coupling induced voltage is made to change, formation this phase output terminal voltage of distribution line is superposed with a certain phase input terminal voltage of distribution line, realize adjusting the purpose of voltage at this phase output terminal of distribution line by this gear.When transmitting equal-wattage, owing to transformer inputs voltage is higher, thus the electric current flowing through voltage regulation coil in parallel is less, therefore arranges the tap gear of voltage regulation coil in parallel at this phase input of distribution line, shoves generation without transition during switching.
, autotransformer adopts the structure of a kind of uniqueness: by having the switch combination of interlock function, when realizing voltage regulation coil in parallel and output winding of connecting separated, voltage regulation coil oneself in parallel closes formation loop, constitute current transformer structure, at this moment, voltage regulation coil in parallel is in short-circuit condition, and disconnect with distribution line input, input without foreign voltage, it is equivalent to Current Transformer Secondary side, in this case series voltage-regulating coil is carried out tap gear switch, will not inject toward distribution line and shove or cause electric arc, the effect suppressing electric current to shove can be had plus the electric capacity in parallel at voltage regulation coil in parallel, thus such structure can realize the Arc-free tap changer gear switch of no-flashy-flow.Autotransformer is made to carry out under current transformer structure state during pressure regulation gear switch, effectively can be shoved produced by cancellation band voltage adjustment of on-load electric arc, reduce the infringement of tapping switch contact, extend switch on and off service life, make the work of automatic voltage regulator become more stable reliably.
, series connection output winding be connected between a certain phase input/output terminal of distribution line, when carrying out pressure regulation gear switching operation, constituting current transformer structure, at this moment, series connection output winding produces without self coupling induced voltage, this phase of distribution line keeps straight-through, flow only through line current, be equivalent to current transformer primary side, in this case, the output of this phase voltage of distribution line is held essentially constant with input, and the electrical load connected below runs unaffected.Can power continuously when ensureing distribution line a certain facies tract load switching pressure regulation gear, not to impacting by electric loading or causing electrical equipment to restart.
In conjunction with drawings and Examples, the present invention is described in further detail below.
Accompanying drawing explanation
Accompanying drawing 1 is the general function structure chart of the present invention；
Accompanying drawing 2 is controller architecture functional-block diagram；
Accompanying drawing 3 is microprocessor unit circuit figure；
Accompanying drawing 4 is single-phase voltage sample circuit figure；
Accompanying drawing 5 single-phase voltage regulating drives module circuit diagram；
Accompanying drawing 6 is controller pressure regulation software flow pattern.
Accompanying drawing 6 description of reference numerals:
1, whether single-phase voltage allows upper limit difference more than reference voltage；
2, whether single-phase voltage allows lower limit difference less than reference voltage；
3, the selected pressure regulation gear closest to reference voltage；
4, send out driving signal and drive module to single-phase voltage regulating, disconnect voltage regulation coil in parallel and the connecting valve connected between output winding；
5, send out driving signal and drive module to single-phase voltage regulating, connect voltage regulation coil connecting to neutral switch formation in parallel and input closed-loop path without foreign voltage, constitute current transformer structure；
6, send out driving signal and drive module to single-phase voltage regulating, disconnect the pressure regulation gear that parallel single-phase voltage regulation coil connected originally；
7, send out driving signal and drive module to single-phase voltage regulating, connect the pressure regulation gear that parallel single-phase voltage regulation coil is newly selected；
8, send out driving signal and drive module to single-phase voltage regulating, disconnect voltage regulation coil connecting to neutral switch closures in parallel；
9, send out driving signal and drive module to single-phase voltage regulating, connect voltage regulation coil in parallel and the connecting valve connected between output winding, reconstitute auto-transformer configuration.
Detailed description of the invention
The present invention is directed to the problem that part distribution line a certain phase voltage qualification rate is too low, a kind of single-phase automatic voltage regulator of distribution line of design, adopt the auto-transformer configuration that multi-tap pressure regulation gear, the secondary coil series connection a certain phase input/output terminal of distribution line are set at out-primary, when switching pressure regulation gear, after armature winding first disconnects input voltage oneself's Guan Bi, switch pressure regulation gear again, realize no-flashy-flow, switch voltage regulation function without electric arc, make Voltage Cortrol to Eligibility requirements, meet electric power netting safe running requirement.Simultaneously, can power continuously when ensureing a distribution line wherein facies tract load switching pressure regulation gear, not to impacting by electric loading or causing electrical equipment to restart, it is adaptable to single-phase voltage undulating value is very big, the distribution line that a certain phase voltage in circuit posterior segment is very low or too high.Innovative point of the present invention is to overcome adjustable transformer in the market easily to cause, when single-phase zone load switching pressure regulation gear, the electric arc that shoves, easily to impacting by electric loading or causing electrical equipment to restart, high-power resistance need to be bridged and reduce the phenomenon of switching electric current impact.
Embodiment:
Accompanying drawing 1 is the general function structure chart of embodiments of the invention, with reference to accompanying drawing 1.
Below in conjunction with accompanying drawing 1, the function of the single-phase automatic voltage regulator of distribution line is described in further detail.This pressure regulator includes single-phase autotransformer, single-phase load ratio bridging switch and voltage regulator controllers three part.Wherein, described single-phase autotransformer belongs to a kind of self coupling series voltage-regulating transformator, is made up of voltage regulation coil in parallel, series connection output winding.Parallel single-phase voltage regulation coil is the public winding of autotransformer, is attempted by distribution line input as primary winding, can arrange multiple tap gear, and this example arranges the coil of 3 taps, by having the load ratio bridging switch K of interlock function1A、K2A、K3AConnect a gear in 3 tap gears respectively.Single-phase series output winding is connected between a certain phase input and output of distribution line as secondary windings, produce self coupling induced voltage, for boost pressure regulation time, series connection output winding Same Name of Ends raises direction concatenation by this phase voltage, during for blood pressure lowering pressure regulation, series connection output winding Same Name of Ends reduces direction concatenation, load ratio bridging switch K by this phase voltage1A、K2A、K3AWhen connecting the different gear of this voltage regulation coil that is in parallel, this can be made to be in parallel voltage regulation coil and to produce change with the no-load voltage ratio connecting between output winding, produced self coupling induced voltage forms different output end voltages from this phase input voltage overlapped in series of distribution line, reaches this phase output terminal of distribution line by different gear booster tensions or the purpose reducing voltage.Such as, K to be connected1AThis of place be in parallel voltage regulation coil gear pressure regulation time, first by interlock switch K0A2 ends are got to by 1 end, at this moment, it is separated that this is in parallel voltage regulation coil with output winding of connecting, voltage regulation coil in parallel is without external input voltage, oneself's Guan Bi forms loop, constitutes current transformer structure, and voltage regulation coil in parallel is equivalent to Current Transformer Secondary side, in order to reduce the issuable transition current of connection further, it is connected in parallel with a capacitor C at voltage regulation coil in parallelA, harmonic carcellation and the effect shoved can be played.At this moment, the series connection output winding being connected between a certain phase input and output of distribution line does not produce self coupling voltage, this phase of distribution line keeps straight-through, flow only through line current, be equivalent to current transformer primary side, the output of this phase voltage of distribution line is held essentially constant with input, does not affect the properly functioning of load below.Then, by having the load ratio bridging switch of interlock function, control K1AGuan Bi, K2A、K3ADisconnecting, switching voltage regulation coil in parallel is to K1AThe gear at place, it is achieved the adjustment of pressure regulation gear.After again, by interlock switch K0ABeing returned 1 end by 2 ends, at this moment, voltage regulation coil in parallel recloses between output winding with connecting, and voltage regulation coil oneself closed-loop path in parallel disconnects, and reconstitutes auto-transformer configuration, the new K adjusted1AParallel connection voltage regulation coil gear in place becomes armature winding, voltage regulation coil in parallel changes with the no-load voltage ratio connected between output winding, this phase input terminal voltage of self coupling induced voltage and distribution line produced by series connection output winding superposes and obtains this phase output terminal voltage, reaches to adjust the purpose of voltage by this gear.
Single-phase load ratio bridging switch, it it is the switch combination with interlock function, the construction of switch of each phase is all identical and each independent, can use A.C. contactor switch, combination switch or other have and automatically control the power load switch being switched on or switched off, below in conjunction with accompanying drawing 1, the function of the single-phase load ratio bridging switch of distribution line is described in further detail.For single-phase shunting switch, K0AFor being connected between voltage regulation coil in parallel with series connection output winding and voltage regulation coil oneself in parallel closes the switch combination in formation loop, this example parallel connection voltage regulation coil arranges 3 tap gears, K1A、K2A、K3AFor corresponding each tap gear connecting valve, by corresponding relay driving break-make, relay drive circuit drives module to be connected with microprocessor single-phase voltage regulating.Such as, to switch and be connected to K1AWhen the voltage regulation coil gear in parallel at place carries out pressure regulation, microprocessor single-phase voltage regulating drive module to send and drive signal to relay drive circuit, first by interlock switch K0A2 ends are got to by 1 end, at this moment, voltage regulation coil in parallel is separated with output winding of connecting, voltage regulation coil oneself in parallel closes and forms the loop without foreign voltage, constitute current transformer structure, be equivalent to Current Transformer Secondary side, series connection output winding is connected between a certain phase input and output of distribution line, this phase of distribution line keeps straight-through, flow only through line current, produce without self coupling induced voltage, be equivalent to current transformer primary side, the output of this phase of distribution circuit electric voltage is held essentially constant with input, does not affect the properly functioning of load below.Then, microprocessor single-phase voltage regulating drive module to send and drive signal to relay drive circuit, control K1AGuan Bi, K2A、K3ADisconnecting, switching voltage regulation coil in parallel is to K1AThe gear at place, it is achieved the adjustment of pressure regulation gear.After again, microprocessor single-phase voltage regulating drive module to send and drive signal to relay drive circuit, by interlock switch K0ABeing returned 1 end by 2 ends, at this moment, voltage regulation coil in parallel recloses between output winding with connecting, and voltage regulation coil oneself closed-loop path in parallel disconnects, and reconstitutes auto-transformer configuration the K that will newly adjust1APlace parallel connection voltage regulation coil gear as primary winding, self coupling induced voltage produced by voltage regulation coil and the Turn Ratio Changing connected between output winding in parallel, reach a certain phase output terminal of distribution line and adjust the purpose of voltage by this gear.
Accompanying drawing 2 is embodiment controller architecture functional-block diagram.With reference to accompanying drawing 2.
Described controller includes: microprocessor unit, single-phase voltage sampling module, single-phase voltage regulating drive module, wherein single-phase voltage sampling module is connected with microprocessor input pin, single-phase voltage regulating drives module to be connected with microprocessor output pin, it is solidified with the embedded Control software being embodied as pressure regulation scheme in microprocessor, is used for controlling single-phase voltage data sampling and receives and pressure regulation driving.
The function of controller is described in detail in detail for single-phase voltage regulating control in conjunction with accompanying drawing 2, accompanying drawing 3, accompanying drawing 4, accompanying drawing 5 below.Single-phase voltage sampling module is made up of voltage analog input block, A/D converting unit, single-phase voltage becomes low voltage signal through the voltage transformer translation circuit scaling transformation of voltage analog input block, enter the arrangement of voltage signal amplifying circuit and become normal low voltage signal, become digital signal for microprocessor samples via A/D change-over circuit.Single-phase voltage regulating drives module to drive signal to carry out power amplification for the pressure regulation exported by microprocessor, drive circuit to should phase whole shunting switchs combination, by driving signal is carried out power amplification, drive each switch motion of single-phase load ratio bridging switch through relay correspondence.Its workflow is: micro processor loop sampling single-phase voltage, when sampling this phase voltage, by sampled value compared with the reference voltage of setting, if in reference voltage bound difference range, not sending out control command, continues circulating sampling single-phase voltage successively.nullIf this phase sampler voltage exceedes the upper limit difference that reference voltage allows，Or less than the lower limit difference that reference voltage allows，Then this voltage regulation coil voltage regulation result pressure regulation gear closest to reference voltage that is in parallel selected，Then Regulation Control operation is performed，Microprocessor is first sent out driving signal and is driven modular power to amplify through this phase pressure regulation，Relay is driven to disconnect this connecting valve being in parallel voltage regulation coil and connecting between output winding，Then driving signal is sent out through power amplification，Drive relay that the connecting to neutral of this voltage regulation coil that is in parallel is switched Guan Bi to be formed without foreign voltage input circuit，Constitute current transformer structure，Then driving signal is sent out through power amplification，Relay is driven to disconnect the pressure regulation gear that this voltage regulation coil that is in parallel connected originally，Send out driving signal again through power amplification，Relay is driven to connect the pressure regulation gear that this voltage regulation coil that is in parallel is newly selected，Reach pressure regulation gear switch purpose.Then driving signal is sent out through power amplification, relay is driven to disconnect the connecting to neutral switching circuitry of this voltage regulation coil that is in parallel, reclose this connection being in parallel voltage regulation coil and connecting between output winding, reconstitute auto-transformer configuration, it is achieved the adjustment of pressure regulation gear.
Accompanying drawing 6 gives the controller pressure regulation software flow pattern of embodiment, can compile out source program according to this flow chart and implement the present invention.
Claims (2)
1. a no-flashy-flow, the single-phase automatic voltage regulator of distribution line without electric arc gear shift, it is characterized by: include single-phase autotransformer, controller, single-phase load ratio bridging switch, described single-phase autotransformer includes single-phase series connection output winding and single-phase voltage regulation coil in parallel；This voltage regulation coil that is in parallel is attempted by a certain phase input of distribution line as autotransformer armature winding, has more than one tap changer gear；This output winding that is in series is connected between this phase input/output terminal of distribution line as autotransformer secondary windings, its Same Name of Ends direction makes this phase output terminal voltage raise according to self coupling induced voltage or reduces to need and connect, the voltage regulation coil in parallel of this phase carries out self coupling connecting and disconnecting by shunting switch with connecting between output winding, the voltage regulation coil in parallel of this phase carries out oneself by shunting switch and connects Guan Bi formation loop, and the above two of shunting switch connects and composes interlocked relationship；Multiple tap changer gears of this voltage regulation coil that is in parallel all each correspondence is serially connected with shunting switch and carries out connecting and disconnecting, and can only connect a tap gear every time, forms interlocked relationship；Described single-phase load ratio bridging switch, for having multiple switch combinations of interlock function, by shunting switch self coupling connecting and disconnecting between parallel single-phase voltage regulation coil with corresponding series connection output winding, this voltage regulation coil that is in parallel is connected Guan Bi by shunting switch oneself and is formed loop, and two kinds connect and compose interlocking, this voltage regulation coil tap changer gear that is in parallel is by shunting switch connecting and disconnecting, and synchronization can only connect one of them tap gear, other tap gears disconnect, and form interlocking；Each group switch of shunting switch is all respectively connected with corresponding driving relay, drives module output drive signal to corresponding driving relay by controller, by the switch connection or the disconnection that drive relay to start correspondence；Described regulator controller includes microprocessor unit, single-phase voltage sampling module, single-phase voltage regulating driving module, wherein single-phase voltage sampling module is connected input single-phase voltage sample data with microprocessor input pin, single-phase voltage regulating drives module to be connected output drive signal with microprocessor output pin, it is solidified with the embedded Control software being embodied as pressure regulation scheme in microprocessor, is used for controlling single-phase voltage sampling and receives and pressure regulation driving operation.
2. the single-phase automatic voltage regulator of distribution line according to claim 1, is characterized by: microprocessor adopts STM32F103.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510837896.3A CN105743096A (en) | 2015-11-26 | 2015-11-26 | Inrush current-free and arc shifting-free power distribution line single-phase automatic voltage regulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510837896.3A CN105743096A (en) | 2015-11-26 | 2015-11-26 | Inrush current-free and arc shifting-free power distribution line single-phase automatic voltage regulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106920662A (en) * | 2017-05-04 | 2017-07-04 | 山东民生电气设备有限公司 | A kind of distribution transformer on-load voltage regulation transition current limliting auto-transformer |
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| CN205195274U (en) * | 2015-11-26 | 2016-04-27 | 北海市深蓝科技发展有限责任公司 | Do not have and shove, have single -phase pressuretrol of distribution lines that electric arc was shifted gears |
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| CN104167739A (en) * | 2014-05-05 | 2014-11-26 | 华北电力大学 | Four-bridge arm thyristor switch voltage-regulating circuit and voltage-regulating method |
| CN104882891A (en) * | 2015-06-16 | 2015-09-02 | 江苏现代电力科技股份有限公司 | Low-voltage distribution voltage-regulation equipment |
| CN205195274U (en) * | 2015-11-26 | 2016-04-27 | 北海市深蓝科技发展有限责任公司 | Do not have and shove, have single -phase pressuretrol of distribution lines that electric arc was shifted gears |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106920662A (en) * | 2017-05-04 | 2017-07-04 | 山东民生电气设备有限公司 | A kind of distribution transformer on-load voltage regulation transition current limliting auto-transformer |
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Application publication date: 20160706 |