CN105974984B - A kind of switching device applied to series AC voltage-stablizer - Google Patents
A kind of switching device applied to series AC voltage-stablizer Download PDFInfo
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- CN105974984B CN105974984B CN201610549255.2A CN201610549255A CN105974984B CN 105974984 B CN105974984 B CN 105974984B CN 201610549255 A CN201610549255 A CN 201610549255A CN 105974984 B CN105974984 B CN 105974984B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
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Abstract
The present invention discloses a kind of switching device applied to series AC voltage-stablizer, including：First transformer and switch switching unit；Switch switching unit includes：First switch, second switch, third switch, the 4th switch, low-pressure side live wire link, live wire high-pressure side link, zero line high-pressure side link and load；The switching switch of tandem is connected on the high-pressure side of transformer, when load circuit passes through high current, according to the no-load voltage ratio of transformer and the relation of electric current, high voltage side current very little, the small switch K of active volume1To K8To control transformer, so as to greatly save installation cost, reliability is improved.Meanwhile the mode that parallel connection first compensates branch is employed, solve series compensation type AC voltage regulator in the process of running; overvoltage phenomenon caused by off state switching; switching switch and Transformer Winding can be effectively protected, device damage is avoided, realizes the operation steady in a long-term of equipment at the scene.
Description
Technical field
The present invention relates to field of power, more particularly to a kind of switch applied to series AC voltage-stablizer to switch dress
Put.
Background technology
In the case where low voltage electric network radius of electricity supply is bigger, supply line is thinner, easily there is transformer outlet side
Supply voltage is normal, but line drop excursion is big, terminal voltage situation not up to standard：Electricity consumption under serious conditions during low-voltage
Equipment can not normal work because of brownout；Electrical equipment may be damaged during high voltage because of overtension again.
Factory as shown in Figure 1 power circuit, is typically being connected to reactive-load compensation power capacitor residing for power transformation.It is assumed that middle supply
Electric line is thinner, then line resistance and line inductance are all larger.When several plant loads are bigger, load current
Cause larger voltage drop on the line.When electric substation's exit potential is rated value, then in end factory building, such as the point in figure
At 14, voltage is low, and equipment can not normal work（Particularly with threephase asynchronous, torque is small when voltage is low, and heating is serious）.
And when the plant and equipment overwhelming majority is stopped, line load electric current is minimum.Now if reactive-load compensation capacitor is not cut in time
Remove, according to power system voltage stabilization principle, electric substation will rise relative to the voltage of upper level power distribution network.Now line current
Small, line drop is low, then end-equipment is subjected to higher line voltage.
Brownout and the too high normal work to equipment are all unfavorable.From the angle of protection equipment, it is desirable to equipment electricity
Pressure is within allowed band.Therefore, the stable-pressure device that can be increased exchanges at point 14, makes a little setting in factory building corresponding to 14
Standby voltage is near rated value.
Although auto-transformer can use the iron core of small volume to transmit larger capacity, in this circuit, own
Power network input current and output current by switch switch over, contact capacity is big.And during using mechanical switch, big work(
The switch life number of rate mechanical switch is limited；During using power electronic devices, device for high-power power electronic own loss is big,
Device internal temperature rise is high when heavy load is run, and heat abstractor has accounted for very big device inner space.Other either high-power machine
Tool type switch or high-power electric and electronic type switch, cost are very high.
The content of the invention
In order to overcome above-mentioned deficiency of the prior art, it is an object of the present invention to provide one kind to be applied to series AC
The switching device of voltage-stablizer, including：First transformer and switch switching unit；
The switch switching unit includes：First switch K1, second switch K2, the 3rd switch K3, the 4th switch K4, low pressure
Side live wire link, live wire high-pressure side link, zero line high-pressure side link, the first compensation branch and load；
One end of the low-pressure side live wire link is connected with power firestreak, the other end and the load of low-pressure side live wire link
First end connects；
The low-voltage side coil of first transformer is arranged in the low-pressure side live wire link；
Live wire high-pressure side link is connected with power firestreak, and zero line high-pressure side link one end is connected with zero line, and zero line is high
The pressure side link other end is connected with the second end loaded；
The first end of first transformer high-voltage lateral coil passes through first switch K1With live wire high-pressure side link and power firestreak
Connection；
The first end of first transformer high-voltage lateral coil passes through second switch K2It is connected with zero line high-pressure side link；
Second end of the first transformer high-voltage lateral coil passes through the 3rd switch K3With live wire high-pressure side link and power firestreak
Connection；
Second end of the first transformer high-voltage lateral coil passes through the 4th switch K4It is connected with zero line high-pressure side link；
The first switch K1With second switch K2Between be provided with the first delays time to control module, the first delays time to control mould
Block is used to only make first switch K1With second switch K2One of switch closure, when by first switch K1Closure is switched to second
Switch K2During closure, first switch K1Disconnect, after default delay, second switch K2Closure；
Or when by second switch K2Closure is switched to first switch K1During closure, second switch K2Disconnect, prolong by default
Shi Hou, first switch K1Closure；
The 3rd switch K3With the 4th switch K4Between be provided with the second delays time to control module, the second delays time to control mould
Block is used to only make the 3rd switch K3With the 4th switch K4One of switch closure, when by the 3rd switch K3Closure is switched to the 4th
Switch K4During closure, the 3rd switch K3Disconnect, after default delay, the 4th switch K4Closure；
Or when by the 4th switch K4Closure is switched to the 3rd switch K3During closure, the 4th switch K4Disconnect, prolong by default
Shi Hou, the 3rd switch K3Closure；
The first compensation branch includes the compensating switch K being arranged in seriesSWith resistance R；
The first end first end with the first transformer high-voltage lateral coil, the first switch K respectively of the first compensation branch1
One end, second switch K2One end connection；
The second end with the first transformer high-voltage lateral coil, the 3rd switch K respectively at second end of the first compensation branch3
One end, the 4th switch K4One end connection.
Preferably, the switch switching unit also includes：Bypass, the bypass are provided with by-pass switch Kp；
It is described bypass it is in parallel with low-pressure side live wire link, and it is described bypass one end be connected with power firestreak, bypass it is another
Hold and be connected with the first end loaded.
Preferably, first switch K1, second switch K2, the 3rd switch K3, the 4th switch K4Relay is respectively adopted, or it is disconnected
Road device, or high power relay；
The time relay, or single-chip microcomputer is respectively adopted in first delays time to control module, the second delays time to control module.
Preferably, including：Second transformer；
First transformer and the second transformer series are arranged；
The switch switching unit also includes：5th switch K5, the 6th switch K6, the 7th switch K7, the 8th switch K8；
The low-voltage side coil of second transformer is arranged in the low-pressure side live wire link；
The first end of second transformer high-voltage lateral coil passes through the 5th switch K5With live wire high-pressure side link and power firestreak
Connection；
The first end of second transformer high-voltage lateral coil passes through the 6th switch K6It is connected with zero line high-pressure side link；
Second end of the second transformer high-voltage lateral coil passes through the 7th switch K7With live wire high-pressure side link and power firestreak
Connection；
Second end of the second transformer high-voltage lateral coil passes through the 8th switch K8It is connected with zero line high-pressure side link；
The 5th switch K5With the 6th switch K6Between be provided with the 3rd delays time to control module, the 3rd delays time to control mould
Block is used to only make the 5th switch K5With the 6th switch K6One of switch closure, when by the 5th switch K5Closure is switched to the 6th
Switch K6During closure, the 5th switch K5Disconnect, after default delay, the 6th switch K6Closure；
Or when by the 6th switch K6Closure is switched to the 5th switch K5During closure, the 6th switch K6Disconnect, prolong by default
Shi Hou, the 5th switch K5Closure；
The 7th switch K7With the 8th switch K8Between be provided with the 4th delays time to control module, the 4th delays time to control mould
Block is used to only make the 7th switch K7With the 8th switch K8One of switch closure, when by the 7th switch K7Closure is switched to the 8th
Switch K8During closure, the 7th switch K7Disconnect, after default delay, the 8th switch K8Closure；
Or when by the 8th switch K8Closure is switched to the 7th switch K7During closure, the 8th switch K8Disconnect, prolong by default
Shi Hou, the 7th switch K7Closure.
Preferably, the switch switching unit also includes：Second compensation branch；
The second compensation branch includes the compensating switch K being arranged in seriesS1With resistance R1；
The first end with the second transformer high-voltage lateral coil, the 5th switch K to the first end of the second compensation branch respectively5
One end, the 6th switch K6One end connection；
The second end with the second transformer high-voltage lateral coil, the 7th switch K respectively at second end of the second compensation branch7
One end, the 8th switch K8One end connection.
Preferably, the 5th switch K5, the 6th switch K6, the 7th switch K7, the 8th switch K8Relay is respectively adopted, or it is disconnected
Road device, or high power relay；
The time relay, or single-chip microcomputer is respectively adopted in 3rd delays time to control module, the 4th delays time to control module.
As can be seen from the above technical solutions, the present invention has advantages below：
The switching switch of tandem is connected on the high-pressure side of transformer, when load circuit passes through high current, according to transformer
No-load voltage ratio and electric current relation, high voltage side current very little, the small switch K of active volume1To K8To control transformer, so as to significantly
Installation cost is saved, improves reliability.
Meanwhile the mode that parallel connection first compensates branch is employed, solve series compensation type AC voltage regulator and running
Cheng Zhong, overvoltage phenomenon caused by off state switching, switching switch and Transformer Winding can be effectively protected, avoids equipment from damaging
It is bad, realize the operation steady in a long-term of equipment at the scene.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, the required accompanying drawing used in description will be made below simple
Ground introduction, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill
For personnel, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is prior-art illustration；
Fig. 2 is the circuit diagram of the switching device applied to series AC voltage-stablizer；
Fig. 3 is the preferable circuit diagram of switching device applied to series AC voltage-stablizer；
Fig. 4 is the circuit diagram of AC transformer in parallel.
Embodiment
To enable goal of the invention, feature, the advantage of the present invention more obvious and understandable, will use below specific
Embodiment and accompanying drawing, the technical scheme protected to the present invention are clearly and completely described, it is clear that implementation disclosed below
Example is only part of the embodiment of the present invention, and not all embodiment.Based on the embodiment in this patent, the common skill in this area
All other embodiment that art personnel are obtained under the premise of creative work is not made, belong to the model of this patent protection
Enclose.
In the present invention, can connect multiple transformers while controls.In the present embodiment by taking two transformers of connecting as an example.Such as
Shown in Fig. 2, including：First transformer T1 and switch switching unit；
The switch switching unit includes：First switch K1, second switch K2, the 3rd switch K3, the 4th switch K4, low pressure
Side live wire link 5, live wire high-pressure side link 6, zero line high-pressure side link 7, first compensate branch 9 and load 8；
One end of the low-pressure side live wire link 5 is connected with power firestreak, the other end of low-pressure side live wire link 5 and load
First end 8a connections；
The low-voltage side coil 1 of first transformer is arranged in the low-pressure side live wire link 5；
Live wire high-pressure side link 6 is connected with power firestreak, and the one end of zero line high-pressure side link 7 is connected with zero line, zero line
The other end of high-pressure side link 7 is connected with the second end 8b loaded；
The first end 2a of first transformer high-voltage lateral coil 2 passes through first switch K1With live wire high-pressure side link 6 and power supply
Live wire connects；
The first end 2a of first transformer high-voltage lateral coil passes through second switch K2It is connected with zero line high-pressure side link 7；
The first end 2a for being exactly the first transformer high-voltage lateral coil passes through first switch K1With live wire high-pressure side link 6 and power firestreak
Connection；Also pass through second switch K2It is connected with zero line high-pressure side link 7；Here second switch K is passed through2With zero line high-pressure side link 7
Connection, it can be understood as, the first end 2a of the first transformer high-voltage lateral coil passes through second switch K2Connect with load 8 and zero line
Connect.
Second end 2b of the first transformer high-voltage lateral coil passes through the 3rd switch K3With live wire high-pressure side link 6 and power supply fire
Line connects；Second end 2b of the first transformer high-voltage lateral coil passes through the 4th switch K4It is connected with zero line high-pressure side link 7；Also
Be the first transformer high-voltage lateral coil the second end 2b i.e. by the 3rd switch K3Connect with live wire high-pressure side link 6 and power firestreak
Connect；Also pass through the 4th switch K4It is connected with zero line high-pressure side link 7;Here the 4th switch K is passed through4Connect with zero line high-pressure side link 7
Connect, it can be understood as, the second end 2b of the first transformer high-voltage lateral coil passes through the 4th switch K4It is connected with load 8 and zero line.
The first switch K1With second switch K2Between be provided with the first delays time to control module, the first delays time to control mould
Block is used to only make first switch K1With second switch K2One of switch closure, when by first switch K1Closure is switched to second
Switch K2During closure, first switch K1Disconnect, after default delay, second switch K2Closure；
Or when by second switch K2Closure is switched to first switch K1During closure, second switch K2Disconnect, prolong by default
Shi Hou, first switch K1Closure；
The 3rd switch K3With the 4th switch K4Between be provided with the second delays time to control module, the second delays time to control mould
Block is used to only make the 3rd switch K3With the 4th switch K4One of switch closure, when by the 3rd switch K3Closure is switched to the 4th
Switch K4During closure, the 3rd switch K3Disconnect, after default delay, the 4th switch K4Closure；
Or when by the 4th switch K4Closure is switched to the 3rd switch K3During closure, the 4th switch K4Disconnect, prolong by default
Shi Hou, the 3rd switch K3Closure.
The first compensation branch 9 includes the compensating switch K being arranged in seriesSWith resistance R；
The first end 2a with the first transformer high-voltage lateral coil, first open the first end 11 of the first compensation branch respectively
Close K1One end, second switch K2One end connection；
The second end 2b with the first transformer high-voltage lateral coil, the 3rd open respectively at second end 12 of the first compensation branch
Close K3One end, the 4th switch K4One end connection.
The switch switching unit also includes：Bypass, the bypass are provided with by-pass switch Kp；Bypass and low-pressure side live wire
Link 5 is in parallel, and described bypass one end is connected with power firestreak, and the other end of bypass is connected with the first end 8a loaded.
First switch K1, second switch K2, the 3rd switch K3, the 4th switch K4Relay, or breaker is respectively adopted, or
High power relay；The time relay, or single-chip microcomputer is respectively adopted in first delays time to control module, the second delays time to control module.
Because the switching switch of tandem is connected on the high-pressure side of transformer, when load circuit passes through high current, according to change
The no-load voltage ratio of depressor and the relation of electric current, high voltage side current very little, the small switch K of active volume1To K4To control transformer, so as to
Installation cost is greatlyd save, improves reliability.Meanwhile the transformer capacity used is also small, reach big with low power device control
The purpose of power output.Although this device saves material from principle, cost is low, is gone wrong when applying at the scene
More, subject matter appears in mechanical and power electronics type switch and is easily damaged, and here it is the problem to be solved in the present invention.
In Fig. 2, K is switched1And K2It can not simultaneously turn on, input power short circuit otherwise occurs.Similarly, other are connected to transformation
Two switches on the same terminal of device can not simultaneously turn on.Switch motion needs certain time, then switchs from K1Closure switching
To K2, it is necessary to switch K in closing course1First disconnect, delay a period of time, then by K2Closure.During this, it may appear that at one section
Between switch K1And K2Situation about simultaneously switching off, opened a way equivalent to transformer high-voltage winding.There is also same to ask for other switch combinations
Topic.It is theoretical according to transformer in the case where load current is bigger, when high pressure winding is opened a way, pass through the load of low pressure winding
Electric current is all changed into the exciting current of transformer.Exciting current only accounts for a small portion of winding current under transformer normal operation
Point, caused magnetic field induction goes out the rated voltage of transformer.
To ensure the reliability of the switching device applied to series AC voltage-stablizer, therefore, to assure that switch transfer process
Middle high voltage side of transformer can not open a way, in the high-pressure side of transformer switch K in parallelsWith resistance R, it is achieved thereby that without overvoltage
Switching process.Its course of work is as follows：With transformer T1Exemplified by, if KS、K2And K3Disconnect, K1And K4Close, then transformer T1It is high
Pressure side joint enters input voltage, T1In low-pressure side output voltage series connection access load circuit, load voltage changes.If now need
It is switched to K1And K3Disconnect, K2And K4Closure, transformer are exited compensation way, then operated using order below：Close KS, input
Voltage is applied directly on resistance R；Be delayed tens milliseconds, disconnects switch K1, now equivalent to one current transformer of transformer,
Resistance R provides the current channel after a reduction for load current, so as to be produced in high-pressure side without overvoltage；Delay waits K1
It is determined that disconnecting, K is connected2, high voltage side of transformer short circuit in winding, the voltage on resistance R is reduced to zero；Delay waits K2It is determined that closure, breaks
Open KS, switch handoff procedure and terminate.
Each switch can be mechanical switch, or power electronics type switchs.Resistance R resistances should be with the impedance of transformer
A reference value is suitable.Because handoff procedure is very short, within generally 100 milliseconds, even if input voltage is applied directly to produce on resistance R
Very big instantaneous power, but the time is short, caused gross energy very little, and resistance R heatings are very light.Therefore small-power, small can be used
The resistance R and K of volumeSSeries connection.
The present invention can realize that the switch of multiple transformers switches, in the present embodiment, exemplified by using two transformers.
Specifically, as shown in figure 3, present invention additionally comprises：Second transformer T2；First transformer T1 and the second transformer T2
Arranged in series；The switch switching unit also includes：5th switch K5, the 6th switch K6, the 7th switch K7, the 8th switch K8；The
The low-voltage side coil 3 of two transformers is arranged in the low-pressure side live wire link 5；
The first end 4a of second transformer high-voltage lateral coil 4 passes through the 5th switch K5With live wire high-pressure side link 6 and power supply
Live wire connects；The first end 4a of second transformer high-voltage lateral coil passes through the 6th switch K6It is connected with zero line high-pressure side link 7；
Second end 4b of the second transformer high-voltage lateral coil passes through the 7th switch K7With live wire high-pressure side link 6 and power supply fire
Line connects；Second end 4b of the second transformer high-voltage lateral coil passes through the 8th switch K8It is connected with zero line high-pressure side link 7；
The 5th switch K5With the 6th switch K6Between be provided with the 3rd delays time to control module, the 3rd delays time to control mould
Block is used to only make the 5th switch K5With the 6th switch K6One of switch closure, when by the 5th switch K5Closure is switched to the 6th
Switch K6During closure, the 5th switch K5Disconnect, after default delay, the 6th switch K6Closure；Or when by the 6th switch K6Close
Conjunction is switched to the 5th switch K5During closure, the 6th switch K6Disconnect, after default delay, the 5th switch K5Closure；
The 7th switch K7With the 8th switch K8Between be provided with the 4th delays time to control module, the 4th delays time to control mould
Block is used to only make the 7th switch K7With the 8th switch K8One of switch closure, when by the 7th switch K7Closure is switched to the 8th
Switch K8During closure, the 7th switch K7Disconnect, after default delay, the 8th switch K8Closure；Or when by the 8th switch K8Close
Conjunction is switched to the 7th switch K7During closure, the 8th switch K8Disconnect, after default delay, the 7th switch K7Closure.
The switch switching unit also includes：Second compensation branch 10；The second compensation branch 10 includes being arranged in series
Compensating switch KS1With resistance R1；The first end 13 of the second compensation branch respectively with the second transformer high-voltage lateral coil the
One end 4a, the 5th switch K5One end, the 6th switch K6One end connection；It is described second compensation branch the second end 14 respectively with
Second end 4b of the second transformer high-voltage lateral coil, the 7th switch K7One end, the 8th switch K8One end connection.
5th switch K5, the 6th switch K6, the 7th switch K7, the 8th switch K8Relay, or breaker is respectively adopted, or
High power relay；The time relay, or single-chip microcomputer is respectively adopted in 3rd delays time to control module, the 4th delays time to control module.
In order to embody the beneficial effect in the present invention, make using Fig. 4 TR as one with tapped auto-transformer
For contrast.When power network input voltage is low, K can will be switchedpDisconnect, K11And K13Disconnect, K12Closure, K14Closure, K15And K16
Disconnect, now output voltage is higher than input voltage.The various combination of various switches can obtain different output voltages, output electricity
Pressure can be higher than input voltage, can also be less than input voltage.
In AC transformer in parallel, also by the way of sliding contact changes transformer output no-load voltage ratio, sliding contact
By motor driven, slided in Fig. 4 between contact 1 and 3, the switch in Fig. 4 is instead of with carbon brush.But found in putting into practice, carbon brush
In high current working environment, easily wear and cause contact point to aoxidize, contact point loose contact, be also easy to produce spark and heating,
Universal service life is not grown.
Switching device provided by the invention applied to series AC voltage-stablizer, as by-pass switch KpDuring disconnection, if K5
And K7Disconnect, K6And K8Close, now transformer T2High-pressure side is in short-circuit condition, high side voltage zero, is then series at load
Secondary winding voltage in loop is also zero, T2It is not engaged in the alternating voltage compensation to load.If now K2And K3Disconnect, K1
And K4Close, then transformer T1Input voltage, T are accessed in high-pressure side1In low-pressure side output voltage series connection access load circuit, load
Voltage changes.If K2And K3Closure, K1And K4Disconnect, then opposite direction change occurs for load voltage.If K1And K3Disconnect, K2With
K4Closure, then high voltage side of transformer voltage is zero, and low-pressure side voltage is also zero, and load voltage is equal to input voltage.Change switch K1
To K8Combination, can obtain different input voltage regulation changes.
The present invention is reliability of the guarantee applied to the switching device of series AC voltage-stablizer, therefore, to assure that switch turns
High voltage side of transformer can not open a way during changing, in the high-pressure side of transformer switch K in parallelsWith resistance R, it is achieved thereby that nothing
Over-voltage process.Its course of work is as follows：With transformer T1Exemplified by, if KS、K2And K3Disconnect, K1And K4Close, then transformation
Device T1Input voltage, T are accessed in high-pressure side1In low-pressure side output voltage series connection access load circuit, load voltage changes.If
Now need to be switched to K1And K3Disconnect, K2And K4Closure, transformer are exited compensation way, then operated using order below：Closure
KS, input voltage is applied directly on resistance R；Be delayed tens milliseconds, disconnects switch K1, now equivalent to one electric current of transformer
Transformer, resistance R provide the current channel after a reduction for load current, so as to be produced in high-pressure side without overvoltage；Prolong
When wait K1It is determined that disconnecting, K is connected2, high voltage side of transformer short circuit in winding, the voltage on resistance R is reduced to zero；Delay waits K2Really
Fixed closure, disconnects KS, switch handoff procedure and terminate.
Further by taking specific embodiment as an example, using Fig. 2 circuits, a 5KVA, 220/36V transformer is as T1,
That is T1Low-pressure side one terminates input voltage, and the other end directly connects load.The power output of whole series compensation type AC voltage regulator
Up to 35KVA, resistance R uses 10 Europe/500W, and relay is as switch.In handoff procedure, no switch overvoltage is present, electricity
Hinder imperceptible temperature rise on R.Device when input voltage is between 176-264V, output voltage can stablize 203-237V it
Between, realize and powerful purpose is controlled by low-power device.
The technical program employs the mode of a switch in parallel and a resistance, solves series compensation type AC voltage-stabilizing
Device in the process of running, overvoltage phenomenon caused by off state switching, can effectively protect switching switch and Transformer Winding,
Device damage is avoided, realizes the operation steady in a long-term of equipment at the scene.Meanwhile what is used in technical scheme is small-power device
Part, such as the high-power output of wattage transformer control, low current switch is as control loop.Due to using low-power device, dress
It is small to put heating itself, is advantageous to live steady operation.And comparatively, low-power device cost is low, reliability is high, Ke Yijie
Lot of materials is saved, effectively reduces device materials cost, improves the economic benefit of product.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, identical similar portion refers to mutually between each embodiment.
Term " first ", " second ", " the 3rd " " in description and claims of this specification and above-mentioned accompanying drawing
Four " etc.（If there is）It is for distinguishing similar object, without for describing specific order or precedence.It should manage
The data that solution so uses can exchange in the appropriate case, so as to embodiments of the invention described herein can with except
Here the order beyond those for illustrating or describing is implemented.In addition, term " comprising " and " having " and their any deformation,
It is intended to cover non-exclusive include.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (5)
- A kind of 1. switching device applied to series AC voltage-stablizer, it is characterised in that including：First transformer, second Transformer and switch switching unit；The switch switching unit includes：First switch K1, second switch K2, the 3rd switch K3, the 4th switch K4, low-pressure side live wire Link, live wire high-pressure side link, zero line high-pressure side link, the first compensation branch and load；One end of the low-pressure side live wire link is connected with power firestreak, the other end of low-pressure side live wire link and the first of load End connection；The low-voltage side coil of first transformer is arranged in the low-pressure side live wire link；Live wire high-pressure side link is connected with power firestreak, and zero line high-pressure side link one end is connected with zero line, zero line high-pressure side The link other end is connected with the second end loaded；The first end of first transformer high-voltage lateral coil passes through first switch K1It is connected with live wire high-pressure side link with power firestreak；The first end of first transformer high-voltage lateral coil passes through second switch K2It is connected with zero line high-pressure side link；Second end of the first transformer high-voltage lateral coil passes through the 3rd switch K3It is connected with live wire high-pressure side link with power firestreak；Second end of the first transformer high-voltage lateral coil passes through the 4th switch K4It is connected with zero line high-pressure side link；The first switch K1With second switch K2Between be provided with the first delays time to control module, the first delays time to control module is used In only making first switch K1With second switch K2One of switch closure, when by first switch K1Closure is switched to second switch K2During closure, first switch K1Disconnect, after default delay, second switch K2Closure；Or when by second switch K2Closure is switched to first switch K1During closure, second switch K2Disconnect, by default delay Afterwards, first switch K1Closure；The 3rd switch K3With the 4th switch K4Between be provided with the second delays time to control module, the second delays time to control module is used K is switched in only making the 3rd3With the 4th switch K4One of switch closure, when by the 3rd switch K3Closure is switched to the 4th switch K4During closure, the 3rd switch K3Disconnect, after default delay, the 4th switch K4Closure；Or when by the 4th switch K4Closure is switched to the 3rd switch K3During closure, the 4th switch K4Disconnect, by default delay Afterwards, the 3rd switch K3Closure；The first compensation branch includes the compensating switch K being arranged in seriesSWith resistance R；The first end first end with the first transformer high-voltage lateral coil, the first switch K respectively of the first compensation branch1One End, second switch K2One end connection；The second end with the first transformer high-voltage lateral coil, the 3rd switch K respectively at second end of the first compensation branch3One End, the 4th switch K4One end connection；First transformer and the second transformer series are arranged；The switch switching unit also includes：5th switch K5, the 6th switch K6, the 7th switch K7, the 8th switch K8；The low-voltage side coil of second transformer is arranged in the low-pressure side live wire link；The first end of second transformer high-voltage lateral coil passes through the 5th switch K5It is connected with live wire high-pressure side link with power firestreak；The first end of second transformer high-voltage lateral coil passes through the 6th switch K6It is connected with zero line high-pressure side link；Second end of the second transformer high-voltage lateral coil passes through the 7th switch K7It is connected with live wire high-pressure side link with power firestreak；Second end of the second transformer high-voltage lateral coil passes through the 8th switch K8It is connected with zero line high-pressure side link；The 5th switch K5With the 6th switch K6Between be provided with the 3rd delays time to control module, the 3rd delays time to control module is used K is switched in only making the 5th5With the 6th switch K6One of switch closure, when by the 5th switch K5Closure is switched to the 6th switch K6During closure, the 5th switch K5Disconnect, after default delay, the 6th switch K6Closure；Or when by the 6th switch K6Closure is switched to the 5th switch K5During closure, the 6th switch K6Disconnect, by default delay Afterwards, the 5th switch K5Closure；The 7th switch K7With the 8th switch K8Between be provided with the 4th delays time to control module, the 4th delays time to control module is used K is switched in only making the 7th7With the 8th switch K8One of switch closure, when by the 7th switch K7Closure is switched to the 8th switch K8During closure, the 7th switch K7Disconnect, after default delay, the 8th switch K8Closure；Or when by the 8th switch K8Closure is switched to the 7th switch K7During closure, the 8th switch K8Disconnect, by default delay Afterwards, the 7th switch K7Closure.
- 2. the switching device according to claim 1 applied to series AC voltage-stablizer, it is characterised in thatThe switch switching unit also includes：Bypass, the bypass are provided with by-pass switch Kp；It is described bypass it is in parallel with low-pressure side live wire link, and it is described bypass one end be connected with power firestreak, the other end of bypass and The first end connection of load.
- 3. the switching device according to claim 1 or 2 applied to series AC voltage-stablizer, it is characterised in thatFirst switch K1, second switch K2, the 3rd switch K3, the 4th switch K4Relay, or breaker is respectively adopted；The time relay, or single-chip microcomputer is respectively adopted in first delays time to control module, the second delays time to control module.
- 4. the switching device according to claim 1 applied to series AC voltage-stablizer, it is characterised in thatThe switch switching unit also includes：Second compensation branch；The second compensation branch includes the compensating switch K being arranged in seriesS1With resistance R1；The first end with the second transformer high-voltage lateral coil, the 5th switch K to the first end of the second compensation branch respectively5One End, the 6th switch K6One end connection；The second end with the second transformer high-voltage lateral coil, the 7th switch K respectively at second end of the second compensation branch7One End, the 8th switch K8One end connection.
- 5. the switching device according to claim 4 applied to series AC voltage-stablizer, it is characterised in that5th switch K5, the 6th switch K6, the 7th switch K7, the 8th switch K8Relay, or breaker is respectively adopted；The time relay, or single-chip microcomputer is respectively adopted in 3rd delays time to control module, the 4th delays time to control module.
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| EP2290775A1 (en) * | 2009-08-31 | 2011-03-02 | ABB Research Ltd. | A method of fault phase selection and fault type determination |
| CN103701135A (en) * | 2013-11-25 | 2014-04-02 | 国家电网公司 | Intelligent series compensation device for distribution network and use method of compensation device |
| CN105226661A (en) * | 2015-09-18 | 2016-01-06 | 国网山东省电力公司东营供电公司 | The suppressing method of a kind of voltage ripple of power network and flickering |
| CN105515009A (en) * | 2015-12-02 | 2016-04-20 | 中国石油大学(华东) | Series-compensative bidirectional automatic voltage-regulating method for low-voltage power distribution line |
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2016
- 2016-07-13 CN CN201610549255.2A patent/CN105974984B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2290775A1 (en) * | 2009-08-31 | 2011-03-02 | ABB Research Ltd. | A method of fault phase selection and fault type determination |
| CN103701135A (en) * | 2013-11-25 | 2014-04-02 | 国家电网公司 | Intelligent series compensation device for distribution network and use method of compensation device |
| CN105226661A (en) * | 2015-09-18 | 2016-01-06 | 国网山东省电力公司东营供电公司 | The suppressing method of a kind of voltage ripple of power network and flickering |
| CN105515009A (en) * | 2015-12-02 | 2016-04-20 | 中国石油大学(华东) | Series-compensative bidirectional automatic voltage-regulating method for low-voltage power distribution line |
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