CN207218257U - A kind of taiwan area based on the level SVG of three-phase four-wire system three becomes out-of-balance current controlling device - Google Patents
A kind of taiwan area based on the level SVG of three-phase four-wire system three becomes out-of-balance current controlling device Download PDFInfo
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- CN207218257U CN207218257U CN201721139087.6U CN201721139087U CN207218257U CN 207218257 U CN207218257 U CN 207218257U CN 201721139087 U CN201721139087 U CN 201721139087U CN 207218257 U CN207218257 U CN 207218257U
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- 238000000034 method Methods 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000007935 neutral effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The utility model provides a kind of taiwan area based on the level SVG of three-phase four-wire system three and becomes out-of-balance current controlling device, including control unit, SVG power cells, grid-connected contactor, WIFI unit and load-side current transformer；Wherein：The SVG power cells are connected to the step down side outlet of taiwan area change by grid-connected contactor；The primary side of the load-side current transformer is socketed on the bus between device access point and load, secondary side Access Control unit；Described control unit accesses SVG power cells by control line, and the output control and input for realizing SVG power cells are protected；The WIFI module is by RS232 interface Access Control unit, for realizing the transmitted in both directions of data；In the breaking coil Access Control unit of the grid-connected contactor.The present apparatus uses imbalance compensation algorithm, and the three-phase current unbalance that taiwan area becomes can be achieved and administer.
Description
Technical field
It the utility model is related to distributing net platform region and become low pressure laod unbalance electric current improvement field, it is more particularly to a kind of to be based on three
The level SVG of phase four-wire system three taiwan area becomes out-of-balance current controlling device.
Background technology
It is single-phase load that China's residential electricity consumption is most of, and distribution low-pressure side is essentially the three-phase four-wire system mode of connection, with reference to
The difference of residential electricity consumption attribute, distribution low-pressure side generally existing three-phase imbalance situation.Three-phase imbalance can cause a series of electricity
Energy quality problems, mainly have：Neutral current increases, and neutral conductor failure, heating even burn load；Step down side has zero
Sequence electric current, transformer loss increase；Line loss increases.As rhythm of life is accelerated, economy develops rapidly, distribution low-pressure side three-phase is not
Balance improvement is more and more common, installs three-phase imbalance compensation device additional and has become and must match somebody with somebody.Three-phase imbalance compensation device at present
It can realize that continuous, smooth, quick regulation three phase unbalance current is seldom simultaneously, and because taiwan area becomes typically in fence or bar
On, monitoring, maintenance, control and the inconvenience of imbalance compensation device.
Utility model content
In view of the above-mentioned problems, the shortcomings that primary and foremost purpose of the present utility model is to overcome prior art and deficiency, there is provided one
Taiwan area of the kind based on three-phase four-wire system SVG becomes out-of-balance current controlling device.
The purpose of this utility model is realized using following technical scheme：
A kind of taiwan area change out-of-balance current controlling device based on the level SVG of three-phase four-wire system three, including control unit,
SVG power cells, grid-connected contactor, WIFI unit and load-side current transformer；Wherein：
The SVG power cells are connected to the step down side outlet of taiwan area change by grid-connected contactor；
The primary side of the load-side current transformer is socketed on the bus between device access point and load, secondary side
Access Control unit；
Described control unit by control line access SVG power cells, for realize SVG power cells output control and
Input protection；
The WIFI module is by RS232 interface Access Control unit, for realizing the transmitted in both directions of data；
In the breaking coil Access Control unit of the grid-connected contactor.
Wherein, described SVG power cells include flat ripple reactance, the bridge arm power cell of T-shaped three-phase three, DC support electricity
Hold, Hall sensor group, wherein：
The flat ripple reactance is serially connected between the grid-connected contactor and Hall sensor group；
The bridge arm power cell of T-shaped three-phase three is made up of IGBT and its Drive Protecting Circuit, and the IGBT is connected across institute
State between grid-connected contactor lower end and DC support electric capacity；
The DC support electric capacity is composed in parallel by multigroup electric capacity, and half is connected across between DC+ and O, and second half is connected across
Between DC- and O, wherein O represents the N lines between half DC support electric capacity and second half DC support electric capacity；
The Hall sensor group is made up of 4 current Hall sensors, 4 current Hall sensors primary side point
It is not socketed on A, B, C, N output line of the flat ripple reactance lower end, secondary side access current sampling circuit.
Wherein, described control unit by voltage, current sample and process circuit, DSP unit, more FPGA units, PWM and
Input circuit, control output circuit and its peripheral circuit composition are protected, wherein：
The voltage, current sample and process circuit are by multigroup voltage transformer, multigroup current transformer and multiple filtering
Circuit forms, wherein, AC voltage transformer is connected across between low pressure main bus-bar and zero line, and DC voltage transformer passes through resistance
Partial pressure is connected across between DC+ and O, DC- and O, each group current transformer be socketed on respectively the leading-out terminal of present apparatus three-phase and four-line with
And bus load-side, it is corresponding that voltage transformer and each current transformer are connected to DSP unit through respective filter circuit respectively
A/D converting analogue signals inputs, the reading of result is carried out by the A/D modular converters inside DSP unit；
The DSP unit by DSP Processor and its periphery must circuit form, for being analyzed the data of sampling,
Processing, judge and store, and generate control command and carry out dynamic PWM controls；
More FPGA units are used to be responsible for completing total logical design and computing；
The PWM and protection input circuit are used for output and the SVG power cell protection signals for completing pulse signal
Input；
The control output circuit is used for the trip protection function of completing contactor.
Wherein, described grid-connected contactor, corresponding model is selected according to device rated current, is connected across bus and described
Between IGBT.
Wherein, described WIFI unit, including WIFI nucleus modules and WIFI antennas, WIFI nucleus modules are connected across described
Between DSP Processor communication port and WIFI antennas, signal is received and sent by WIFI antennas.
Wherein, described load-side current transformer, it is Open Type Electric Current Mutual Inductor, for completing adopting for load-side electric current
Sample, its primary side are directly socketed in the voltage bus between device and load, secondary side outlet access described control unit
Voltage, current sample and process circuit.
The beneficial effects of the utility model are：The present apparatus is by sampling the Current calculation of busbar voltage, load-side per mutually electricity
The size of stream and neutral point current, imbalance compensation electric current forms open loop control according to corresponding to calculating algorithm and control device exports
System, connection, smooth, quick regulation three phase unbalance current can be realized simultaneously, effectively the out-of-balance current of triple line is entered
Row is administered.
Brief description of the drawings
Using accompanying drawing, the utility model is described in further detail, but the embodiment in accompanying drawing is not formed to of the present utility model
Any restrictions, on the premise of not paying creative work, can also be according to following attached for one of ordinary skill in the art
Figure obtains other accompanying drawings.
Fig. 1 is the typical electrical schematic diagram of the utility model device；
Fig. 2 is the utility model device SVG unit composition schematic diagrams；
Fig. 3 is the utility model device control units composition schematic diagram；
Fig. 4 is the utility model device representative configuration dimensional drawing；
Fig. 5 is the utility model device typical case's outdoor installation schematic diagram；
Fig. 6 is the utility model device typical case's primary system wiring schematic diagram.
Reference：
1- taiwan areas become, 2- transformer 0.4kV outlets, 3- control units, 4-SVG power cells, 5-WIFI units, 6- loads
Side current transformer, the grid-connected contactors of 7-, 11-DSP units, the more FPGA units of 12-, 13- control output circuits, 14-PWM and guarantor
Protect input circuit, 15- voltages, current sample and process circuit, the flat ripple reactance of 17-, 18- Hall sensor groups, 19-T type three-phases
Three bridge arm power cells, 20- DC support electric capacity.
Embodiment
The utility model is further described with reference to following application scenarios.
Referring to Fig. 1-6, a kind of taiwan area based on the level SVG of three-phase four-wire system three becomes out-of-balance current controlling device, and it is special
Sign is, including control unit 3, SVG power cells 4, grid-connected contactor 7, WIFI unit 5 and load-side current transformer 6；Its
In：
The SVG power cells 4 are connected to the step down side outlet of taiwan area change 1, the change by grid-connected contactor 7
Depressor low-voltage side outlet is transformer 0.4kV outlets 2；
The primary side of the load-side current transformer 6 is socketed on the bus between device access point and load, secondary
Side joint enters control unit 3；
The power supply of described control unit 3 is derived from A, N line of transformer 0.4kV outlets 2；
Inside device, described control unit 3 accesses SVG power cells 4 by control line, realizes the defeated of SVG power cells 4
Go out control and input protection；
The WIFI module 5 realizes the transmitted in both directions of data by RS232 interface Access Control unit 3；
In control output circuit 13 in the breaking coil Access Control unit 3 of the grid-connected contactor 7.
The present apparatus is by sampling busbar voltage, the every phase current of Current calculation of load-side and the size of neutral point current, root
Simultaneously imbalance compensation electric current corresponding to control device output is calculated according to algorithm and forms opened loop control, can be realized connection simultaneously, be put down
Sliding, quick regulation three phase unbalance current, is effectively administered to the out-of-balance current of triple line.
Wherein, the SVG power cells 4 include flat ripple reactance 17, the bridge arm power cell 19 of T-shaped three-phase three, DC support
Electric capacity 20, Hall sensor group 18, wherein：
The flat ripple reactance 17, the inductance that 0.3mH is mainly equivalent to by discrete connection in series-parallel form, and are serially connected in described grid-connected
Between contactor and Hall sensor group；
The bridge arm power cell 19 of T-shaped three-phase three is by Xi Menkang T font SKiM401TMLI12E4B IGBT and its drive
Dynamic protection circuit composition, the IGBT are connected across between the grid-connected contactor lower end and DC support electric capacity 20；
The DC support electric capacity 20 is composed in parallel by multigroup electric capacity, and half is connected across between DC+ and O, second half bridging
Between DC- and O, wherein O represents the N lines between half DC support electric capacity and second half DC support electric capacity；
The Hall sensor group 18 is made up of 4 current Hall sensors, 4 current Hall sensor primary sides
It is socketed in respectively on A, B, C, N output line of the flat lower end of ripple reactance 17, secondary side access current sampling circuit 15.
Wherein, described control unit 3 is by voltage, current sample and process circuit 15, DSP unit 11, more FPGA units
12nd, PWM and protection input circuit 14, control output circuit 13 and its peripheral circuit composition, wherein：
The voltage, current sample and process circuit 15 are by multigroup voltage transformer, multigroup current transformer and multiple filters
Wave circuit forms, wherein, AC voltage transformer is connected across between low pressure main bus-bar and zero line, and DC voltage transformer passes through electricity
Resistance partial pressure is connected across between DC+ and O, DC- and O, and each group current transformer is socketed on the leading-out terminal of present apparatus three-phase and four-line respectively
And bus load-side, each voltage transformer summation current transformer are connected in DSP unit 11 through respective filter circuit respectively
Corresponding A/D converting analogue signals inputs, the reading of result is carried out by the A/D modular converters inside DSP unit 11；
The DSP unit 11 is by the necessary circuit of DSP Processor DSP28335 and its periphery, including reset, crystal oscillator, uncoupling
Electric capacity etc. forms, and for the data of sampling to be analyzed, handle, judge and stored, and generates control command and carries out dynamically
PWM is controlled；
More FPGA units 12 are used to be responsible for completing total logical design and computing, including three XC3S500E and one
XC3SD3400A, XC3SD3400A and DSP28335 interface are connected by 74HC245 bus drivers, 3 XC3S500E points
Not Fu Ze A, B, C phase pwm pulse output, be connected with main FPGA by I/O port；
The PWM and protection input circuit 14 are used for output and the SVG power cell protection signals for completing pulse signal
Input, be made up of DS75451, FOD3120,6N136, DS75451 is connected across between XC3S500E and FOD3120, FOD3120
It is connected across between DS75451 and IGBT Drive Protecting Circuit, realizes that pulse output control IGBT, 6N136 are connected across
Between XC3S500E and IGBT Drive Protecting Circuit, the input of module protection signal is realized；
The control output circuit 13 is used for the trip protection function of completing contactor, and optocoupler is connected across XC3SD3400A's
On the breaking coil of I/O port and grid-connected contactor 7, more outputs level signals of FPGA unit 12 control optocoupler, and optocoupler turns on then grid-connected
Contactor 7 realizes tripping operation.
Wherein, described grid-connected contactor 7, corresponding model is selected according to device rated current, is connected across bus and described
Between IGBT.
Wherein, described WIFI unit 5, including WIFI nucleus modules and WIFI antennas, WIFI nucleus modules are connected across institute
State between DSP Processor communication port and WIFI antennas, receive and send signal by WIFI antennas.
Wherein, described load-side current transformer 6, it is Open Type Electric Current Mutual Inductor, for completing load-side electric current
Sampling, its primary side are directly socketed in the voltage bus between device and load, secondary side outlet access described control unit
Voltage, current sample and process circuit 15.
The utility model device simultaneously takes into account radiating due to outdoor installation, shelling machine rain-proof.
The utility model device in-site installation, easy-to-connect.
The utility model above-described embodiment, the present apparatus, can by carrying out sample detecting to three-phase current on bus automatically
Quick detection goes out the situation of three-phase current unbalance, and continuous, smooth, quick regulation is carried out to it, efficiently solves distribution
It is the problem of three-phase current unbalance of low-pressure side generally existing, highly reliable, intelligent height, it is easy to use, reality can be met
The needs of application.
Finally it should be noted that above example is only illustrating the technical solution of the utility model, rather than to this reality
With the limitation of novel protected scope, although being explained with reference to preferred embodiment to the utility model, this area it is general
Logical technical staff should analyze, and the technical solution of the utility model can be modified or equivalent substitution, without departing from this
The spirit and scope of utility model technical scheme.
Claims (6)
1. a kind of taiwan area based on the level SVG of three-phase four-wire system three becomes out-of-balance current controlling device, it is characterised in that including control
Unit, SVG power cells, grid-connected contactor, WIFI unit and load-side current transformer processed；Wherein：
The SVG power cells are connected to the step down side outlet of taiwan area change by grid-connected contactor；
The primary side of the load-side current transformer is socketed on the bus between device access point and load, secondary side access
Control unit；
Described control unit accesses SVG power cells by control line, for realizing output control and the input of SVG power cells
Protection；
The WIFI unit is by RS232 interface Access Control unit, for realizing the transmitted in both directions of data；
In the breaking coil Access Control unit of the grid-connected contactor.
2. a kind of taiwan area based on the level SVG of three-phase four-wire system three according to claim 1 becomes out-of-balance current and administers dress
Put, it is characterised in that described SVG power cells include flat ripple reactance, the bridge arm power cell of T-shaped three-phase three, DC support electricity
Hold, Hall sensor group, wherein：
The flat ripple reactance is serially connected between the grid-connected contactor and Hall sensor group；
The bridge arm power cell of T-shaped three-phase three is made up of IGBT and its Drive Protecting Circuit, the IGBT be connected across it is described simultaneously
Between net contactor lower end and DC support electric capacity；
The DC support electric capacity is composed in parallel by multigroup electric capacity, and half is connected across between DC+ and O, second half be connected across DC- with
Between O, wherein O represents the N lines between half DC support electric capacity and second half DC support electric capacity；
The Hall sensor group is made up of 4 current Hall sensors, and 4 current Hall sensor primary sides cover respectively
It is connected on A, B, C, N output line of the flat ripple reactance lower end, secondary side access current sampling circuit.
3. a kind of taiwan area based on the level SVG of three-phase four-wire system three according to claim 2 becomes out-of-balance current and administers dress
Put, it is characterised in that described control unit is by voltage, current sample and process circuit, DSP unit, more FPGA units, PWM
And protection input circuit, control output circuit and its peripheral circuit composition, wherein：
The voltage, current sample and process circuit are by multigroup voltage transformer, multigroup current transformer and multiple filter circuits
Composition, wherein, AC voltage transformer is connected across between low pressure main bus-bar and zero line, and DC voltage transformer passes through electric resistance partial pressure
It is connected across between DC+ and O, DC- and O, each group current transformer is socketed on leading-out terminal and the mother of present apparatus three-phase and four-line respectively
Linear load side, voltage transformer and each current transformer are connected to the corresponding A/D of DSP unit through respective filter circuit respectively and turned
Input end of analog signal is changed, the reading of result is carried out by the A/D modular converters inside DSP unit；
The DSP unit by DSP Processor and its periphery must circuit form, for being analyzed the data of sampling, being handled,
Judge and store, and generate control command and carry out dynamic PWM controls；
More FPGA units are used to be responsible for completing total logical design and computing；
The PWM and protection input circuit are used to complete the output of pulse signal and the input of SVG power cell protection signals；
The control output circuit is used for the trip protection function of completing contactor.
4. a kind of taiwan area based on the level SVG of three-phase four-wire system three according to claim 3 becomes out-of-balance current and administers dress
Put, it is characterised in that described grid-connected contactor, corresponding model is selected according to device rated current, be connected across bus and described
Between IGBT.
5. a kind of taiwan area based on the level SVG of three-phase four-wire system three according to claim 4 becomes out-of-balance current and administers dress
Put, it is characterised in that described WIFI unit, including WIFI nucleus modules and WIFI antennas, WIFI nucleus modules are connected across institute
State between DSP Processor communication port and WIFI antennas, receive and send signal by WIFI antennas.
6. a kind of taiwan area based on the level SVG of three-phase four-wire system three according to claim 5 becomes out-of-balance current and administers dress
Put, it is characterised in that described load-side current transformer, be Open Type Electric Current Mutual Inductor, for completing load-side electric current
Sampling, its primary side are directly socketed in the voltage bus between device and load, secondary side outlet access described control unit
Voltage, current sample and process circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721139087.6U CN207218257U (en) | 2017-09-06 | 2017-09-06 | A kind of taiwan area based on the level SVG of three-phase four-wire system three becomes out-of-balance current controlling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721139087.6U CN207218257U (en) | 2017-09-06 | 2017-09-06 | A kind of taiwan area based on the level SVG of three-phase four-wire system three becomes out-of-balance current controlling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207218257U true CN207218257U (en) | 2018-04-10 |
Family
ID=61823377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721139087.6U Withdrawn - After Issue CN207218257U (en) | 2017-09-06 | 2017-09-06 | A kind of taiwan area based on the level SVG of three-phase four-wire system three becomes out-of-balance current controlling device |
Country Status (1)
| Country | Link |
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| CN (1) | CN207218257U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394801A (en) * | 2017-09-06 | 2017-11-24 | 国网安徽省电力公司宣城供电公司 | A kind of taiwan area based on the level SVG of three-phase four-wire system three becomes out-of-balance current controlling device |
-
2017
- 2017-09-06 CN CN201721139087.6U patent/CN207218257U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394801A (en) * | 2017-09-06 | 2017-11-24 | 国网安徽省电力公司宣城供电公司 | A kind of taiwan area based on the level SVG of three-phase four-wire system three becomes out-of-balance current controlling device |
| CN107394801B (en) * | 2017-09-06 | 2024-04-02 | 国网安徽省电力公司宣城供电公司 | Station transformer unbalance current treatment device based on three-phase four-wire system three-level SVG |
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