CN107769217A - A kind of dynamic electric voltage recovery device - Google Patents
A kind of dynamic electric voltage recovery device Download PDFInfo
- Publication number
- CN107769217A CN107769217A CN201610702775.2A CN201610702775A CN107769217A CN 107769217 A CN107769217 A CN 107769217A CN 201610702775 A CN201610702775 A CN 201610702775A CN 107769217 A CN107769217 A CN 107769217A
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- China
- Prior art keywords
- contactor
- switch
- phase
- wire
- rectifier
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- 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
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention relates to a kind of dynamic electric voltage recovery device, including phase three-wire three, switch, contactor, rectifier, capacitor, inverter, wave filter, inductance and connecting line, switch includes first, second and the 3rd switchs, contactor includes first, second, third and fourth contactor, capacitor includes the first and second capacitors, connecting line is respectively the first and second connecting lines, phase three-wire three is sequentially connected first switch, first contactor and rectifier, rectifier connects smoothing reactor and charging resistor by the first connecting line, second switch is mounted with charging resistor, charging resistor connects inverter, rectifier connects inverter by Article 2 connecting line；The dynamic electric voltage recovery device of the present invention, is serially connected between power supply and important sensitive load, has good dynamic property.
Description
Technical field
The present invention relates to dynamic electric voltage recovery device, more particularly to a kind of line voltage compensation used suitable for medium voltage distribution network
LVC type dynamic electric voltage recovery devices.
Background technology
Electric energy is the main energy sources of modern society, is one of most important material base of mankind's modern civilization, high quality
Supply of electric power turn into modern society production, smooth and stable development primary condition of living.In the quality of power supply
In problems, voltage pulsation includes endangering the most universal, tool ASSOCIATE STATISTICS caused by low voltage transient, rise, flickering etc.
Show, temporary drop of the large-scale power user amplitude more than 20%, its Annual occurence rate is at 10-20 times or so, in addition, many highly automated
Change continuous flow procedure, economic loss caused by temporarily drop occurs every time is up to hundreds thousand of as many as to millions of dollar, it is seen then that reduce or
Slow down voltage pulsation generation and its caused by harm be to improve the important content of power supply quality, dynamic electric voltage recovery device is excellent
Dynamic capability and high cost performance are current improvement voltage dip means the most cost-effective and instrument, in the last few years, city
Field is to dynamic electric voltage recovery device demand in lasting growth.
The content of the invention
The present invention is in order to solve problem of the prior art, there is provided one kind causes load side electricity when system voltage receives interference
When pressure is fallen in short-term, dynamic electric voltage recovery device can produce offset voltage within 1 ~ 2 millisecond, and bucking-out system voltage is disturbed,
Load side voltage is set to be not felt by disturbance, and Dynamic Voltage Regulator fast response time, it is ensured that load side voltage waveform
For standard sine, the dynamic electric voltage recovery device of the influence of elimination voltage harmonic and voltage fluctuation and flicker to load.
The concrete technical scheme of the present invention is as follows:A kind of dynamic electric voltage recovery device, including phase three-wire three, switch, contactor,
Rectifier, fuse, capacitor, inverter, wave filter, inductance and connecting line, the switch include first switch, second switch
With the 3rd switch, the contactor includes first contactor, second contactor, the 3rd contactor and the 4th contactor, the electricity
Container includes the first capacitor and the second capacitor, and the connecting line is respectively the first connecting line and the second connecting line, its feature
It is：The phase three-wire three is sequentially connected first switch, first contactor and rectifier, and the rectifier passes through the first connecting line
Smoothing reactor and charging resistor are connected, second switch is mounted with the charging resistor, the charging resistor connects inverter,
The rectifier connects inverter by Article 2 connecting line, and the first capacitor and the second capacitor series connection, it connects respectively
It is connected between first line and Article 2 line, the inverter connects wave filter by phase three-wire three, and the wave filter passes through three
Phase three-wire connection the 3rd is switched, and the 3rd switch connection inductance, one end of the inductance is connect by phase three-wire three connection the 3rd
Tentaculum, the other end connect the 4th contactor by phase three-wire three, and the 4th contactor passes through the contact of phase three-wire three connection second
Device, the second contactor connect the 3rd contactor by phase three-wire three.
It is below the attached technical scheme of the present invention.
Preferably, the first switch is touch-switch.
Preferably, the rectifier is that three-phase can not control rectifier.
The technique effect of the present invention：A kind of dynamic electric voltage recovery device of the present invention, is serially connected with power supply and important sensitive load
Between, there is good dynamic property, when generation system voltage temporarily drops, can supply load side within the time no more than 2ms
Piezoelectric voltage returns to normal value, and for the fluctuation of quick offset voltage and voltage dip, electronics is protected using dynamic electric voltage recovery device
Important and the sensitive load or wind-driven generator such as product line, do not influenceed by voltage transient disturbance, improve power supply safety
Property.
Brief description of the drawings
Fig. 1 is a kind of structural representation of dynamic electric voltage recovery device of the present embodiment of the present invention.
In figure：Phase three-wire three 1, switch 2, first switch 21, second switch 22, the 3rd switch 23, contactor 3, first connects
Tentaculum 31, second contactor 32, the 3rd contactor 33, the 4th contactor 34, rectifier 5, capacitor 7, the first capacitor 71, the
Two capacitors 72, smoothing reactor 8, charging resistor 9, inverter 10, the first connecting line 11, the second connecting line 12, wave filter 13,
Inductance 14.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of dynamic electric voltage recovery device of the present embodiment, including it is phase three-wire three 1, switch 2, contactor 3, whole
Device 5, capacitor 7, inverter 10, wave filter 13 and inductance 14 are flowed, the switch 2 includes first switch 21, the and of second switch 22
3rd switch 23, the contactor 3 includes first contactor 31, second contactor 32, the 3rd contactor 33 and the 4th contactor
34, the capacitor 7 includes the first capacitor 71 and the second capacitor 72, and the connecting line includes the first connecting line 11 and second
Connecting line 12, the phase three-wire three 1 are sequentially connected first switch 21, first contactor 31, rectifier 5, and the rectifier 5 is three
Mutually can not control rectifier, by three-phase can not control rectifier alternating current can be converted to direct current.The rectifier 5 passes through first
Connecting line 11 connects smoothing reactor 8 and charging resistor 9, and smoothing reactor is used in the later DC loop of rectification, described to fill
Resistance 9 connects second switch 22, and when second switch is opened, electric current passes through charging resistor, when second switch is closed, electric current
By second switch, the charging resistor 9 connects inverter 10, and the rectifier 5 is directly connected to inversion by Article 2 line 12
Device 9, direct current energy is transformed into alternating current by inverter.The capacitor 72 of first capacitor 71 and second is connected, and it connects respectively
It is connected between first line 11 and Article 2 line 12, the inverter 9 connects wave filter 13, wave filter pair by phase three-wire three 1
Frequency beyond the frequency of specific frequency or the frequency is effectively filtered out, and obtains the power supply signal of a specific frequency, or disappear
Except the power supply signal after a specific frequency, by the switch 23 of the connection of phase three-wire three 1 the 3rd, the described 3rd opens the wave filter 13
Close 23 and inductance 14 is connected by phase three-wire three 1, inductance can produce electromotive force, the inductance 14 when electric current changes in circuit
One end by phase three-wire three 1 connect the 3rd contactor 33, the other end by phase three-wire three 1 connect the 4th contactor 34, it is described
4th contactor 34 connects second contactor 32 by phase three-wire three, and the second contactor 32 connects the 3rd by phase three-wire three
Contactor 33, by set multiple contactors can fast shut-off exchange with that direct current major loop and can be frequently switched on and high current control
System.
A kind of operation principle of dynamic electric voltage recovery device of the present embodiment is：LVC types DVR is applied to three-phase three-wire system system
Unite, the A indicated in three-phase three wire system, the line of B, C tri-（As shown in the figure）, by voltage by first switch S1, first contactor
J1 and fuse, into three-phase can not control rectifier, charged from rectifier to the first capacitor C1 and the second capacitor C2, whole
The DC side of stream device has installed smoothing reactor L1 and charging resistor R1 additional, and smoothing reactor L1 effect is to reduce rectifier exchange
The aberration rate of side current waveform, R1 effect are to reduce charging current when the first capacitor C1, the second capacitor C2 charge, electricity
Condenser charge closes second switch K1 to when 80%, and charging resistor is short-circuited, and the offset voltage amount of inverter output passes through
Series transformer is coupled into major loop, and the higher hamonic wave that wave filter will be filtered out in output voltage, this will reduce series transformer
Design capacity, system needs the electrical quantity that measures to have mains side voltage, load side voltage, load current, compensation electric current and straight
Flow side voltage etc..In the case of system voltage is normal, dynamic electric voltage recovery device is in backup status, and series transformer is not to being
System injecting voltage, the power consumption of device are very low.When voltage problem occurs for the system that detects, input compensation amount, system are electric immediately for device
After pressure recovers normal, compensation rate zero, device is again at backup status.
Further, a kind of dynamic electric voltage recovery device of the present embodiment, energy is obtained by the way of the uncontrollable rectification of three-phase
Amount injection DC side the first capacitor C1 and the second capacitor C2, such energy flow mode ensure that the restorer can be grown
Temporally offset voltage residual quantity, when Voltage Drop occurs for system, dynamic electric voltage recovery device exports with system voltage same frequency, together
Phase, and the offset voltage of appropriate amplitude is superimposed with system voltage to ensure the stabilization of sensitive loads side voltage.
Further, the invention provides a kind of dynamic electric voltage recovery device, load side is caused when system voltage receives interference
When short time voltage is fallen, dynamic electric voltage recovery device can produce offset voltage within 1 ~ 2 millisecond, be done suffered by bucking-out system voltage
Disturb, load side voltage is not felt by disturbance, and Dynamic Voltage Regulator fast response time, it is ensured that load side voltage wave
Shape is standard sine, eliminates the influence of voltage harmonic and voltage fluctuation and flicker to load.Dynamic electric voltage recovery device is band energy storage
The series compensation device of device, it is serially connected between power supply and important sensitive load, there is good dynamic property, when generation system
Load side supply voltage can be returned into normal value within the time no more than 2ms during voltage dip, for quick offset voltage
Fluctuation and voltage dip, the important and sensitive load such as electronic product assembly line or wind-driven generator are protected not by electricity using DVR
The influence of ringing is pressed, improves Supply Security.
A kind of dynamic electric voltage recovery device function of the present invention has：Suppress dynamic and burning voltage fall, surge, flickering；With good
Good dynamic voltage compensation ability；Harmonic wave, three imbalances can effectively be suppressed, improve the quality of power supply.
A kind of dynamic electric voltage recovery device of the present invention, is serially connected between power supply and important sensitive load, has dynamic well
State property energy, load side supply voltage can be returned to normally within the time no more than 2ms when generation system voltage temporarily drops
Value, for the fluctuation of quick offset voltage and voltage dip, protect electronic product assembly line etc. important using dynamic electric voltage recovery device
And sensitive load or wind-driven generator are not influenceed by voltage transient disturbance, improve Supply Security.On it is pointed out that
The technical concepts and features of preferred embodiment only to illustrate the invention are stated, its object is to allow person skilled in the art can
Understand present disclosure and implement according to this, it is not intended to limit the scope of the present invention.It is all real according to spirit of the invention
The equivalent change or modification that matter is made, it should all be included within the scope of the present invention.
Claims (3)
1. a kind of dynamic electric voltage recovery device, including phase three-wire three, switch, contactor, rectifier, capacitor, inverter, filtering
Device, inductance and connecting line, the switch include first switch, second switch and the 3rd switch, the contactor and connect including first
Tentaculum, second contactor, the 3rd contactor and the 4th contactor, the capacitor include the first capacitor and the second capacitor,
The connecting line is respectively the first connecting line and the second connecting line, it is characterised in that：The phase three-wire three is sequentially connected first and opened
Pass, first contactor and rectifier, the rectifier connects smoothing reactor and charging resistor by the first connecting line, described to fill
Second switch is mounted with resistance, the charging resistor connects inverter, and the rectifier is connected by Article 2 connecting line
Inverter, the first capacitor and the second capacitor series connection, it is connected between first line and Article 2 line, described
Inverter connects wave filter by phase three-wire three, and the wave filter passes through the switch of phase three-wire three connection the 3rd, the 3rd switch
Inductance is connected, one end of the inductance connects the 3rd contactor by phase three-wire three, and the other end connects the 4th by phase three-wire three
Contactor, the 4th contactor connect second contactor by phase three-wire three, and the second contactor is connected by phase three-wire three
Connect the 3rd contactor.
2. dynamic electric voltage recovery device as claimed in claim 1, it is characterised in that：The first switch is touch-switch.
3. dynamic electric voltage recovery device as claimed in claim 1, it is characterised in that：The rectifier is the uncontrollable rectification of three-phase
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610702775.2A CN107769217A (en) | 2016-08-23 | 2016-08-23 | A kind of dynamic electric voltage recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610702775.2A CN107769217A (en) | 2016-08-23 | 2016-08-23 | A kind of dynamic electric voltage recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107769217A true CN107769217A (en) | 2018-03-06 |
Family
ID=61263964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610702775.2A Pending CN107769217A (en) | 2016-08-23 | 2016-08-23 | A kind of dynamic electric voltage recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107769217A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601351A (en) * | 2019-09-25 | 2019-12-20 | 华北电力大学 | Dual-power seamless switching device and method |
| CN117996770A (en) * | 2024-04-03 | 2024-05-07 | 山东华天电气有限公司 | Circuit for preventing frequent switching of dynamic voltage recovery device and control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222927A (en) * | 2011-06-15 | 2011-10-19 | 无锡双力电力设备有限公司 | Dynamic voltage restorer based on super-capacitor |
| CN102299523A (en) * | 2011-08-23 | 2011-12-28 | 武汉钢铁(集团)公司 | Dynamic voltage restorer for three-phase four-line system power distribution network |
| CN205882707U (en) * | 2016-06-20 | 2017-01-11 | 北京三得普华科技有限责任公司 | Dynamic voltage restorer's the bypass switch |
-
2016
- 2016-08-23 CN CN201610702775.2A patent/CN107769217A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222927A (en) * | 2011-06-15 | 2011-10-19 | 无锡双力电力设备有限公司 | Dynamic voltage restorer based on super-capacitor |
| CN102299523A (en) * | 2011-08-23 | 2011-12-28 | 武汉钢铁(集团)公司 | Dynamic voltage restorer for three-phase four-line system power distribution network |
| CN205882707U (en) * | 2016-06-20 | 2017-01-11 | 北京三得普华科技有限责任公司 | Dynamic voltage restorer's the bypass switch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601351A (en) * | 2019-09-25 | 2019-12-20 | 华北电力大学 | Dual-power seamless switching device and method |
| CN117996770A (en) * | 2024-04-03 | 2024-05-07 | 山东华天电气有限公司 | Circuit for preventing frequent switching of dynamic voltage recovery device and control method |
| CN117996770B (en) * | 2024-04-03 | 2024-06-28 | 山东华天电气有限公司 | Circuit for preventing frequent switching of dynamic voltage recovery device and control method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
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Application publication date: 20180306 |