CN205509497U - Low pressure control of power quality synthesizes device - Google Patents
Low pressure control of power quality synthesizes device Download PDFInfo
- Publication number
- CN205509497U CN205509497U CN201620205479.7U CN201620205479U CN205509497U CN 205509497 U CN205509497 U CN 205509497U CN 201620205479 U CN201620205479 U CN 201620205479U CN 205509497 U CN205509497 U CN 205509497U
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- unit
- compensation unit
- sequence compensation
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- central control
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- 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
- Y02E40/30—Reactive power compensation
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- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The utility model discloses a low pressure control of power quality synthesizes device, including central control unit, zero sequence compensation unit, negative sequence compensation unit and harmonic improvement unit, zero sequence compensation unit and negative sequence compensation unit link to each other with the three phase voltage line respectively, the harmonic is administered the unit and is equipped with three LC filter circuit of group, three LC filter circuit's of group input links to each other with the three phase voltage line respectively, three LC filter circuit's of group output all links to each other with the load end neutral conductor, every LC filter circuit of group is including the reactor and the intelligent condenser that link to each other, zero sequence compensation unit includes tortuous transformer and impedance dynamic adjustment unit component, be equipped with the temperature transducer on the iron core of tortuous transformer. The utility model discloses can improve the electric energy rate of utilization, reduce the loss, improve economic benefits, reduce the cost, operation safe and reliable, simple to operate is simple to use simultaneously, is applicable to low voltage network such as industrial and mining, enterprise, transportation department, residential block.
Description
Technical field
This utility model relates to electric power low-pressure distribution network technology field, particularly to a kind of low-voltage electric energy quality controlling integration unit.
Background technology
The power quality problem of current domestic low-voltage network mainly has idle, harmonic wave, three-phase imbalance and four sides of flickering
Face.Particularly three-phase imbalance problem, is one of subject matter that annoying power supply unit.Because of low voltage electric network be mostly through
After 10/0.4kV transformer pressure-reducing, with three-phase four-wire system to customer power supply, it is that three-phase productive power mixes use with single-phase load
The supply network of electricity.When the single-phase user of attaching, power supply department single-phase load balancedly should be tapped in principle A, B,
On C three-phase, but in real work and running, due to the uncontrollable increase-volume of single-phase user, the connecing of great power single phase load
Enter and the factor such as asynchronism of single-phase load electricity consumption, all cause the imbalance of threephase load.And this three-phase load
Energy imbalance will necessarily cause loss increase, power consumption efficiency decline, zero-sequence current increase, the service life of shortening equipment,
Power equipment cisco unity malfunction will be caused time serious.
Harm to transformator: three-phase load unbalance will make transformator be in asymmetric operation state, thus cause change
The loss of depressor increases.Specifying according to transformator operating standard, the transformator neutral current being in operation not can exceed that change
The 25% of depressor low-pressure side rated current.Additionally, three-phase load unbalance can cause transformator zero-sequence current excessive, part
Metalwork heats up to be increased, and even results in transformator and burns.
The neutral conductor and neutral point voltage problem: neutral conductor zero-sequence current is excessive, cause the neutral conductor to burn, and causes neutral point electricity
The problems such as pressure skew is excessive.
Harm to electrical equipment: imbalance of three-phase voltage will make inverse moment of torsion in motor increase, thus cause motor
Heat up, the phenomenons such as efficiency declines, energy consumption increase.Therefore the imbalance of three-phase voltage can cause electrical equipment contracting in service life
Short, acceleration equipment part replacement frequency, increase cost of equipment maintenance.
It addition, along with the increase of domestic energy-saving and emission-reduction pressure, various domestic energy-saving products emerge in an endless stream, but these products are all
Non-resistive load, as the electrical equipment such as electricity-saving lamp, electromagnetic oven, convertible frequency air-conditioner can produce bigger harmonic wave, these products for
Energy-saving and emission-reduction also can increase the line loss of supply network while contributing, even can affect the safety of electrical network time serious
Reliability service.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of low-voltage electric energy quality controlling integration unit.Can effective compensation without
Zero-sequence current present in merit, effectively suppression electrical network, filters low-order harmonic simultaneously and promotes three-phrase burden balance, additionally by energy
Enough alarm signals that sends in the case of zigzag transformer is overheated, guarantee runs safety.
The purpose of this utility model is achieved through the following technical solutions:
Low-voltage electric energy quality controlling integration unit of the present utility model, mends including central control unit, zero sequence compensation unit, negative phase-sequence
Repaying unit and harmonic wave governance unit, described zero sequence compensation unit is connected with three-phase electricity line ball respectively with negative sequence compensation unit, and harmonic wave is controlled
Reason unit is provided with three groups of LC filter circuits, and the input of three groups of LC filter circuits is connected with three-phase electricity line ball respectively, three groups of LC
The outfan of filter circuit is all connected with the load end neutral conductor, and often group LC filter circuit includes reactor and the intelligent capacitor being connected
Device；
Described zero sequence compensation unit includes that zigzag transformer and impedance dynamically regulate unit composition, described zigzag transformer primary side
Three inputs are connected with the triple line in low-voltage network respectively, the outfan of zigzag transformer secondary side and the load end neutral conductor
Being connected, described impedance dynamically regulates unit and is connected with central control unit；
Described zigzag transformer is the three-phase windings transformator that former and deputy limit umber of turn is identical, and the iron core of zigzag transformer is provided with
Temperature transducer, temperature transducer is connected with signal amplifier, and signal amplifier controls single by A/D change-over circuit with central authorities
Unit is connected, and central control unit is connected with alarm module；
Described low-voltage electric energy quality controlling integration unit also includes cabinet, described central control unit, negative sequence compensation unit, zero sequence
Compensating unit and harmonic wave governance unit are installed in cabinet.
Further, described negative sequence compensation unit includes the three groups of Intelligent capacitors compensated for grouping switching, three groups of Intelligent capacitors
It is serially connected in respectively in the most biphase pressure-wire in three-phase electricity line ball；
Further, also include that wireless communication module, described wireless communication module are connected with central control unit；
Further, be connected between described zero sequence compensation unit and three-phase electricity line ball and have the first catalyst, the coil of the first catalyst and
Auxiliary contact are connected with central control unit respectively, the other end of the first catalyst auxiliary contact and ac contactor coil one end phase
Even, the other end of the first contactor coil and the other end of ac contactor coil are all connected with the load end neutral conductor；
Further, described cabinet top is provided with radiator fan.
The beneficial effects of the utility model are:
Low-voltage electric energy quality controlling integration unit of the present utility model can improve caused by three-phase load unbalance effectively
Electric energy loss and equipment attrition, zero-sequence current component and negative-sequence current component present in suppression electrical network, filter low effectively
Subharmonic, reduces the meaningless loss in power supply process, has saved the energy, have compensation effect more preferably, power consumption lower,
Easy to maintenance, length in service life and the high feature of reliability；This utility model collects tortuous change also by temperature transducer
The change of depressor temperature, and immediately focus on monitoring server terminal by wireless communication module, if it exceeds preset value,
Then scene sends alarm, notifies that staff gets rid of hidden danger in time；
This utility model whole device parallel connection accesses electrical network, easy for installation, uses simple, can be under specified power situation
By power factor compensation to more than 0.95, within three-phase current unbalance degree is brought up to 10%, by harmonic controling 10%
Within, electric energy utilization rate is high, reduces loss, increases economic efficiency, and reduces cost, safe and reliable to operation.
Other advantages of the present utility model, target and feature will be illustrated to a certain extent in the following description,
And to a certain extent, will be apparent to those skilled in the art based on to investigating hereafter, or
Person can be instructed from practice of the present utility model.Target of the present utility model and other advantages can be by following
Description realizes and obtains.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and advantage clearer, new to this practicality below in conjunction with accompanying drawing
Type is described in further detail, wherein:
Fig. 1 is partial electrical schematic diagram of the present utility model；
Fig. 2 is that catalyst of the present utility model connects circuit theory diagrams.
Detailed description of the invention
Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.Should be appreciated that preferred reality
Execute example only for explanation this utility model rather than in order to limit protection domain of the present utility model.
As it is shown in figure 1, low-voltage electric energy quality controlling integration unit of the present utility model includes central control unit 1, zero sequence compensation
Unit 2, negative sequence compensation unit 3 and harmonic wave governance unit 4.Zero sequence compensation unit 2 and harmonic wave governance unit 4 respectively with three-phase
Pressure-wire is connected with the neutral conductor, and negative sequence compensation unit 3 is connected with three-phase electricity line ball respectively.
Harmonic wave control unit 4 is provided with three groups of LC filter circuits, the input of three groups of LC filter circuits respectively with three-phase electricity line ball
Being connected, the outfan of three groups of LC filter circuits is connected with load end neutral conductor N2, and often group LC filter circuit includes the electricity being connected
Anti-device and Intelligent capacitor.
Negative sequence compensation unit 3 includes the three groups of Intelligent capacitors compensated for grouping switching, the Intelligent electric that three groups of grouping switchings compensate
Container is serially connected in the most biphase pressure-wire in three-phase electricity line ball respectively.Control according to central control unit 1 realizes packet
Switching compensates automatically engaging and excising of capacitor.In the present embodiment, negative sequence compensation unit 3 includes that A phase grouping switching compensates intelligence
Intelligent capacitor C2 and C phase grouping switching compensation Intelligent capacitor C3, capacitor can be compensated by capacitor C1, B phase grouping switching
C1, capacitor C2 and capacitor C3 are formed in parallel by one group of AC capacitor respectively, can determine each phase according to the size of load
Compensate number and the parameter of AC capacitor in parallel in capacitor.
Zero sequence compensation unit 2 is dynamically regulated unit 201 by zigzag transformer TR and impedance and forms, and impedance dynamically regulates unit 201
It is connected with central control unit 1.Three inputs of zigzag transformer TR primary side respectively with the triple line in low-voltage network
Being connected, the outfan of zigzag transformer TR secondary side is connected with load end neutral conductor N2.Impedance dynamically regulates unit 201 and includes
A.C. contactor KM2 and the reactor L1 in parallel with A.C. contactor KM2, impedance dynamically regulates unit 201 and is connected on power supply
Between end neutral conductor N1 and load end neutral conductor N2.Zigzag transformer TR is the three-phase windings that former and deputy limit umber of turn is identical
Transformator, this transformator is the path that resistance value is the lowest to zero-sequence current, by zigzag transformer parallel connection access system, can make zero
Sequence electric current no longer passes through the neutral conductor through zigzag transformer.
As further improving, in the present embodiment, the iron core of zigzag transformer is provided with temperature transducer 5, temperature transducer 5
Being connected with signal amplifier 6, signal amplifier 6 is connected with central control unit 1 by A/D change-over circuit 7, central authorities' control
Unit processed is connected with alarm module 8 and wireless communication module 9.Temperature transducer is used for the change of real-time collecting transformer temperature,
And immediately focus on monitoring server terminal by wireless communication module, if it exceeds preset value, then send alarm, notify work
Personnel get rid of hidden danger in time.
The first catalyst KM1, the first catalyst is had as in figure 2 it is shown, be connected between zigzag transformer TR with three-phase electricity line ball
KM1 has main contactor, coil QC1 and an auxiliary contact QB1, accordingly, A.C. contactor KM2 have main contactor,
Coil QC2 and auxiliary contact QB2.The main contactor of the first catalyst KM1 and A.C. contactor KM2 is used for connecting or disconnected
Opening three-phase electricity line ball and corresponding device, each main contactor and auxiliary contact are normally opened contact.The coil of the first catalyst KM1
QC1 is connected with central control unit 1 respectively with auxiliary contact QB1, another terminals of coil QC1 and the load end neutral conductor
N2 is connected, and another terminals of auxiliary contact QB1 are connected with the coil QC2 of A.C. contactor KM2, and coil QC2's is another
One end is connected with load end neutral conductor N2.First catalyst KM1 and A.C. contactor KM2 series connection is formed and controls loop, makes
First catalyst KM1 and A.C. contactor KM2 checks and balance, it is to avoid because error causes device damage or delays work.
Total power switch K1, lightning protection device MOV, open-phase protection it is connected with in turn between triple line and zero sequence compensation unit 2
Device QX and the first catalyst KM1, feeder ear neutral conductor N1 and load end neutral conductor N2 are provided with zero line switch K2, always electricity
Source switch K1, lightning protection device MOV, open phase protector QX, the first catalyst KM1 and zero line switch K2 respectively with central authorities
Control unit 1 is connected.Three-phase voltage overvoltage, under-voltage, phase shortage, phase sequence mistake are mainly detected by open phase protector QX, anti-
Thunder device MOV carries out lightning protection function to this device and load-side.
As further improving, device of the present utility model also includes cabinet, central control unit, negative sequence compensation unit, zero
Sequence compensating unit and harmonic wave governance unit are installed in cabinet, and safety is higher, and cabinet top is provided with radiator fan, can
To be controlled by central control unit, thus realize heat radiation in time, increase the service life.
Finally illustrating, above example is only in order to illustrate the technical solution of the utility model and unrestricted, although reference
This utility model has been described in detail by preferred embodiment, it will be understood by those within the art that, can be to this
The technical scheme of utility model is modified or equivalent, and without deviating from objective and the scope of the technical program, it is equal
Should contain in the middle of right of the present utility model.
Claims (5)
1. low-voltage electric energy quality controlling integration unit, it is characterised in that: include central control unit, zero sequence compensation unit, negative phase-sequence
Compensating unit and harmonic wave governance unit, described zero sequence compensation unit is connected with three-phase electricity line ball respectively with negative sequence compensation unit, harmonic wave
Governance unit is provided with three groups of LC filter circuits, and the input of three groups of LC filter circuits is connected with three-phase electricity line ball respectively, three groups
The outfan of LC filter circuit is all connected with the load end neutral conductor, and often group LC filter circuit includes reactor and the Intelligent electric being connected
Container；
Described zero sequence compensation unit includes that zigzag transformer and impedance dynamically regulate unit composition, described zigzag transformer primary side
Three inputs are connected with the triple line in low-voltage network respectively, the outfan of zigzag transformer secondary side and the load end neutral conductor
Being connected, described impedance dynamically regulates unit and is connected with central control unit；
Described zigzag transformer is the three-phase windings transformator that former and deputy limit umber of turn is identical, and the iron core of zigzag transformer is provided with
Temperature transducer, temperature transducer is connected with signal amplifier, and signal amplifier controls single by A/D change-over circuit with central authorities
Unit is connected, and central control unit is connected with alarm module；
Described low-voltage electric energy quality controlling integration unit also includes cabinet, described central control unit, negative sequence compensation unit, zero sequence
Compensating unit and harmonic wave governance unit are installed in cabinet.
Low-voltage electric energy quality controlling integration unit the most according to claim 1, it is characterised in that: described negative sequence compensation unit
Including the three groups of Intelligent capacitors compensated for grouping switching, three groups of Intelligent capacitors are serially connected in three-phase electricity line ball wherein respectively
In biphase pressure-wire.
Low-voltage electric energy quality controlling integration unit the most according to claim 1, it is characterised in that: also include wireless telecommunications mould
Block, described wireless communication module is connected with central control unit.
4. according to the low-voltage electric energy quality controlling integration unit described in claim 1 or 2 or 3, it is characterised in that: described zero sequence
It is connected between compensating unit with three-phase electricity line ball and has the first catalyst (KM1), the coil of the first catalyst (KM1) and auxiliary
Contact is connected with central control unit respectively, the other end of the first catalyst (KM1) auxiliary contact and A.C. contactor (KM2)
Coil one end is connected, and the other end of the first catalyst (KM1) coil and the other end of A.C. contactor (KM2) coil are equal
It is connected with the load end neutral conductor.
Low-voltage electric energy quality controlling integration unit the most according to claim 1, it is characterised in that: described cabinet top is arranged
There is radiator fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620205479.7U CN205509497U (en) | 2016-03-17 | 2016-03-17 | Low pressure control of power quality synthesizes device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620205479.7U CN205509497U (en) | 2016-03-17 | 2016-03-17 | Low pressure control of power quality synthesizes device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205509497U true CN205509497U (en) | 2016-08-24 |
Family
ID=56731489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620205479.7U Expired - Fee Related CN205509497U (en) | 2016-03-17 | 2016-03-17 | Low pressure control of power quality synthesizes device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205509497U (en) |
-
2016
- 2016-03-17 CN CN201620205479.7U patent/CN205509497U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20170317 |