CN205863936U - A kind of 35kV direct screening static reacance generator controlled based on many sampled signals Adaptive matching - Google Patents
A kind of 35kV direct screening static reacance generator controlled based on many sampled signals Adaptive matching Download PDFInfo
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- CN205863936U CN205863936U CN201620684272.2U CN201620684272U CN205863936U CN 205863936 U CN205863936 U CN 205863936U CN 201620684272 U CN201620684272 U CN 201620684272U CN 205863936 U CN205863936 U CN 205863936U
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- Prior art keywords
- phase
- circuit
- plc
- core controller
- fpga
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
nullThis utility model relates to a kind of 35kV direct screening static reacance generator controlled based on many sampled signals Adaptive matching，Including touch screen、PLC、Master controller DSP、Core controller FPGA、Filter circuit、Discharge circuit and AD sample circuit、Signal conditioning circuit、Optical fiber、RS485，Master controller DSP is furnished with operating system，Core controller FPGA is furnished with data handling system，Touch screen connects PLC by RS 485，PLC connects master controller DSP by RS 485，PLC connects core controller FPGA by optical fiber，Master controller DSP is connected with core controller FPGA，Core controller FPGA connects filter circuit、Discharge circuit and AD sample circuit，Filter circuit、Discharge circuit and AD sample circuit connect signal conditioning circuit，Core controller FPGA is joined even by optical fiber and H bridge inverter unit CPLD.The utility model has the advantages that, structure optimization, reasonable in design, using effect is good.
Description
Technical field
This utility model relates to a kind of reacance generator in electric and electronic technical field, particularly a kind of based on many samplings
The 35kV direct screening static reacance generator of signal adaptive match control.This utility model be a kind of 35kV electric pressure and more than
High-voltage static var generator, it is applicable to phase sequence error correction and the match control automatically adjusted.
Background technology
At present, along with fast development and the further investigation of instantaneous reactive power theory of Power Electronic Technique, use from changing
The new type static synchronous compensator of phase convertor circuit, it is possible to achieve the wide scope Continuous Compensation from perception to capacitive reactive power,
The most also have that governing speed is fast, range of operation wide, Reactive-power control ability is strong under undervoltage condition, harmonic content and floor space big
The big advantage reduced.Therefore, this new type static synchronous compensator is widely used in high-pressure reactive compensation field.Static reacance
Generator (Static Var Generator) is called for short SVG.
It is known that the correctness of the three phase network power phase grid-connected properly functioning essential condition that is SVG, i.e. to guarantee
The voltage phase sequence of SVG three-phase H bridge inverter unit cascade output in running is consistent with the phase sequence of system busbar, no
Then, SVG easily causes short-circuit or huge circulation and damage equipment when putting into operation.Additionally, and current on line side with compensate side
Voltage, the correctness of current phase is also to ensure that the essential condition of reactive-load compensation, is the most also to be unable to reach to compensate accurately
Effect.
As far as the applicant is aware, the voltage detecting of existing SVG device is by pacifying on the major loop of system busbar voltage
Fill three high voltage potential transformers three-phase phase voltage to be measured respectively, then the voltage of high voltage potential transformer secondary side
Signal is adopted in the signal regulating panel of controller.In sampling circuit, need the artificial guarantee former limit of threephase potential transformer and be
The phase place of system bus electrical network is corresponding, i.e. A, B, C phase voltage transformer is corresponding with A, B, C phase system busbar voltage, and A, B, C phase is electric
Pressure is positive sequence；Three-phase high-voltage voltage transformer once corresponding with quadratic phase；The secondary side phase of three-phase high-voltage voltage transformer
With the input of the signal regulating panel of controller, position ensures that phase place is consistent；Sampled current signals phase place is correct.Adjust it follows that exist
The correctness of each link of sampling circuit, simultaneously SVG cascade d H-bridge inversion when not access system line voltage need to be confirmed during examination
Unit can only export in short-term, thus can cause the feelings to phase that the multivoltage being unfavorable for system exports with cascade d H-bridge inversion unit
Condition, which increases the difficulty of field adjustable person works, require a great deal of time at the scene school line, to phase, simultaneously
10kV electric pressure and following direct screening SVG are owing to the volume of voltage transformer is the biggest and is directly mounted at startup cabinet, still
And can bear, and for 35kV electric pressure and above direct screening SVG, owing to the volume of high voltage potential transformer is big, need to examine
Consider pressure grade, the factor such as inconvenience and price height be installed, based on above reason, it is necessary to change for existing SVG device
Enter.
Summary of the invention
The purpose of this utility model is, the deficiency existed for above-mentioned prior art improves, and proposes and studies one
The 35kV direct screening static reacance generator controlled based on many sampled signals Adaptive matching.This utility model can overcome existing skill
The deficiency of art, cancels the three-phase high-voltage voltage transformer of existing SVG equipment coupling, uses the high-tension electricity in user's bus high-voltage board
Pressure transformer secondary voltage sampled signal as grid-connected voltage signal, be simultaneously based on Implementation of Expert System three-phase system voltage and
The Adaptive matching of current sampling signal controls.This utility model, by specific algorithm and hardware detecting circuit, extrapolates phase
The connection of sequence, the phase place being automatically adjusted cascade d H-bridge inversion unit output voltage is consistent with system electric network voltage phase, it is achieved
Efficiently, the most grid-connected.
Technical solution of the present utility model is, including touch screen, PLC, master controller DSP, core controller FPGA,
Filter circuit, discharge circuit and AD sample circuit, signal conditioning circuit, optical fiber, RS485, master controller DSP is furnished with operation system
System, core controller FPGA is furnished with data handling system, it is characterised in that touch screen connects PLC, PLC by RS485 to be passed through
RS485 connects master controller DSP, and PLC connects core controller FPGA, master controller DSP and core controller by optical fiber
FPGA connects, and core controller FPGA connects filter circuit, discharge circuit and AD sample circuit, filter circuit, discharge circuit with
AD sample circuit connects signal conditioning circuit, and core controller FPGA is joined even by optical fiber and H bridge inverter unit CPLD.
It is characterized in that, the connection of master controller DSP and core controller FPGA is by pin Hard link.
It is characterized in that, PLC is provided with two input ports and an output port.
It is characterized in that, two input ports that PLC is provided with connect transformator respectively and connect group setup unit and electrical network
Character setup unit.
It is characterized in that, the output port that PLC is provided with connects phase place and generates and adjust record and voltage, electric current phasor
Figure unit.
It is characterized in that, core controller FPGA uses the chip of the Cyclone IV series of ALTRA
EP4CE115F23I7。
It is characterized in that, core controller FPGA uses two optical fiber communications with H bridge inverter unit CPLD.
Work process of the present utility model mainly comprises the steps that
First step: the three-phase phase voltage on former limit of the main transformer of user, the sub-sampled signal of two-phase phase current,
Access signal conditioning circuit.It is converted to certain limit by the low voltage voltage transformer on signal conditioning circuit, current transformer
Voltage signal.
Second step: hang the grid-connected required three-phase grid phase voltage signal of SVG from the high pressure PT cabinet cut-off of user 35kV, i.e.
The voltage signal of the voltage transformer secondary side in user's 35kV high pressure PT cabinet is introduced signal conditioning circuit, is converted into certain model
The voltage signal enclosed.
Third step: after the process of sampled signal circuit after filtering, discharge circuit and AD sample circuit, then by core control
Device FPGA processed carries out real-time analog digital conversion and fundamental extraction to sampled signal, obtains main transformer former limit three-phase phase voltage Uha、
Uhb、UhcSignal, former and deputy limit three-phase phase current Iha、Ihb、Ihc、Isa、Isb、IscSignal, grid-connected phase voltage Usa、Usb、UscSignal.
4th step: judge according to the connection group of user's main transformer and the character of electrical network, thus it is inverse to adjust cascade d H-bridge
Become unit output: according to the connection group of user's main transformer, FPGA calculates UhaWith UsaPhase contrast, UhbWith UsbPhase contrast,
UhcWith UscPhase contrast, judge main transformer high-side signal U simultaneouslyha、Uhb、UhcPositive and negative phase sequence whether with main transformer secondary
Phase voltage Usa、Usb、UscPositive and negative phase sequence identical；Judge that the phase voltage on the former limit of user's main transformer with the phase contrast of phase current is
UhaWith IhaPhase contrast, UhbWith IhbPhase contrast, UhcWith IhcThe property of phase contrast limit the most former with user's main transformer electrical network
Matter is corresponding；Judge the phase voltage of user's main transformer secondary and the phase contrast i.e. U of phase currentsaWith IsaPhase contrast, UsbWith Isb
Phase contrast, UscWith IscPhase contrast the most corresponding with the character of user's main transformer secondary electrical network.According to comprehensive judgement
Generate voltage and the phasor diagram of current signal with algorithm controls, automatically carry out simultaneously user's main transformer original edge voltage, former limit with
The self-adaptative adjustment of secondary current controls.
5th step: according to grid-connected phase voltage U of the three-phase system detectedsa、Usb、UscPositive and negative phase sequence automatically adjust control
The three-phase modulations wave phase of device FPGA processed, by PWM inversion control, makes the superposition output electricity mutually of three-phase cascade d H-bridge inversion unit
Pressure Uoa、Uob、UocPhase place respectively with system grid connection phase voltage Usa、Usb、UscPhase place keep in the same direction.Export according to direct screening SVG
Capacitive idle with perception, it is judged that A, C phase Hall of H bridge inverter unit cascade output voltage phase place and SVG exports electric current Ioa、
IocPhase contrast, after comprehensive descision and algorithm controls, automatically adjust A, C phase Hall output electric current I of direct screening SVGoa、IocPhase
Position.
6th step: generate the phasor diagram of each sampled signal according to all of actual samples signal, and according to user
The theoretic former and deputy limit phase voltage phasor diagram that the connection group of main transformer generates, and in operation note, generate phase place tune
Complete record.
The utility model has the advantages that, compared with prior art, structure optimization of the present utility model, reasonable in design, make
With effective.
This utility model passes through specific algorithm, it is possible to the quickly voltage for reactive-load compensation to 35kV direct screening SVG
And current signal corrects, it is simultaneous for the most positive and negative sequence wiring of grid-connected voltage, is automatically adjusted H bridge inverter unit electricity
The phase place that laminated adds output is precisely consistent with system grid connection voltage-phase, and that accomplishes that voltage, current signal phasor be distributed can simultaneously
Depending on changing, it is greatly saved time and manpower, it is ensured that to phase accuracy.Eliminate that volume is big simultaneously, be difficult to install, price high
The high voltage potential transformer of grid-connected voltage detecting link, reduce electrically and the workload of structure designer and SVG device
Production cost.Core controller FPGA uses the chip EP4CE115F23I7 of the Cyclone IV series of ALTRA, cost performance
Height, speed is fast, and capacity is big.
Accompanying drawing explanation
Fig. 1, basic structure block diagram of the present utility model.
Fig. 2, control principle drawing of the present utility model.
Fig. 3, the main circuit structure figure of direct screening SVG.
Detailed description of the invention
Below, in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
As it is shown in figure 1, this utility model includes touch screen, PLC, master controller DSP, core controller FPGA, filtered electrical
Road, discharge circuit and AD sample circuit, signal conditioning circuit, optical fiber, RS485, H bridge inverter unit CPLD, master controller DSP joins
Having operating system, core controller FPGA to be furnished with data handling system, the communication line that touch screen consists of RS485 connects
The communication line that PLC, PLC consist of RS 485 connects master controller DSP, and PLC connects core controller FPGA by optical fiber,
Master controller DSP and core controller FPGA is by pin Hard link, and core controller FPGA connects filter circuit, discharge circuit
Connecting signal conditioning circuit with AD sample circuit, filter circuit, discharge circuit and AD sample circuit, core controller FPGA passes through
The communication line of optical fiber composition connects multiple H bridge inverter unit CPLD respectively.H bridge inverter unit CPLD is arranged on cell board.
Signal conditioning circuit is arranged on signal regulating panel.Direct screening SVG uses cascaded H-bridges inversion unit, and cascaded H-bridges inversion unit includes
Multiple H bridge inverter unit CPLD.
The data handling system of this practical employing is special data handling system, its three-phase system being capable of
Voltage and current sampling signal Adaptive matching control.
As it is shown on figure 3, the major loop of direct screening SVG uses precharge switch, master switch, pre-charge resistance and electrical network to realize joining
Even, the main circuit of direct screening SVG includes three parallel circuits, and each parallel circuit phase line to getting access to grid, each parallel circuit is by 42
The H bridge inverter unit CPLD cascade that individual structure is identical forms, the cascade d H-bridge inversion unit of three parallel circuits of corresponding three phases
One reactor L of series connection respectivelysa、Lsb、Lsc, by precharge switch, master switch, pre-charge resistance access grid-connected side electrical network, directly
Hanging three-phase voltage grid-connected with electrical network for SVG is Usa、Usb、Usc.Cascade d H-bridge inversion unit is by H bridge inverter unit CPLD, IGBT
Drive circuit, IGBT module, thin-film capacitor, equalizing resistance form, and the effect of cascade d H-bridge inversion unit is to realize PWM inversion electricity
The generation of pressure.
PLC is provided with two input ports and an output port.
Two input ports that PLC is provided with connect transformator respectively and connect group setup unit and electrical network character setting list
Unit.
The output port that PLC is provided with connects phase place and generates and adjust record and voltage, electric current phasor figure unit.
Core controller FPGA uses the chip EP4CE115F23I7 of the Cyclone IV series of ALTRA.
Core controller FPGA uses two optical fiber communications with H bridge inverter unit CPLD.
As in figure 2 it is shown, control flow of the present utility model includes START (beginning), voltage, the AD conversion of current signal,
Voltage, the fundamental extraction of current signal, whether the phase sequence of the former and deputy polygonal voltage carrying out main transformer is the determination of same phase sequence；As
Really YES, then judge voltage and the electric current of respective side according to the character of main transformer high-pressure side electrical network, the character of main transformer low-pressure side electrical network
Phase place；If NO, in the case of confirming that the main transformer secondary former and deputy frontier inspection of grid-connected voltage transformer surveys correspondence, automatically adjust
The three-phase voltage phase place of transformer primary side, subsequently, further according to character, the character of main transformer low-pressure side electrical network of main transformer high-pressure side electrical network
Judge the voltage of respective side and the phase place of electric current；Next by controller according to grid-connected voltage-phase, H bridge inversion list is automatically adjusted
The cascade output phase place of unit；Afterwards, according to capacitive and the perception idle judgement H bridge inverter unit cascade output voltage of SVG output
With the phase place of A, C phase Hall current of SVG, the phase place of comprehensive descision and automatically A, C phase Hall current of adjustment SVG；Press down,
Generate actual samples signal phasor diagram, adjust record according to main transformer connection group generation phasor diagram, generation suggestion phase place.Finally,
Control flow terminates.
Work process of the present utility model mainly comprises the steps that
First step: the three-phase phase voltage on former limit of the main transformer of user, the double sampling of two-phase phase current, accesses
Signal conditioning circuit plate.It is converted to a range of electricity by the low voltage voltage transformer on signal regulating panel, current transformer
Pressure signal.
Second step: hang the grid-connected required three-phase grid phase voltage signal of SVG from the high pressure PT cabinet cut-off of user 35kV, i.e.
The voltage signal of the voltage transformer secondary side in user's 35kV high pressure PT cabinet is introduced signal conditioning circuit, is converted into certain model
The voltage signal enclosed.
Third step: sampled signal circuit after filtering, TL064 discharge circuit and MAX1320 ultra high speed A/D conversion circuit
After process, FPGA carries out real-time analog digital conversion and fundamental extraction to sampled signal, obtains main transformer former limit three-phase phase voltage
Uha、Uhb、UhcSignal, former and deputy limit three-phase phase current Iha、Ihb、Ihc、Isa、Isb、IscSignal, grid-connected phase voltage Usa、Usb、UscLetter
Number.Core controller FPGA uses the chip EP4CE115F23I of the Cyclone IV series of ALTRA.
4th step: judge according to the connection group of user's main transformer and the character of electrical network, thus it is inverse to adjust cascade d H-bridge
Become unit output: according to the connection group of user's main transformer, FPGA calculates UhaWith UsaPhase contrast, UhbWith UsbPhase contrast,
UhcWith UscPhase contrast, judge main transformer high-side signal U simultaneouslyha、Uhb、UhcPositive and negative phase sequence whether with main transformer secondary
Phase voltage Usa、Usb、UscPositive and negative phase sequence identical；Judge that the phase voltage on the former limit of user's main transformer with the phase contrast of phase current is
UhaWith IhaPhase contrast, UhbWith IhbPhase contrast, UhcWith IhcThe property of phase contrast limit the most former with user's main transformer electrical network
Matter is corresponding；Judge the phase voltage of user's main transformer secondary and the phase contrast i.e. U of phase currentsaWith IsaPhase contrast, UsbWith Isb
Phase contrast, UscWith IscPhase contrast the most corresponding with the character of user's main transformer secondary electrical network.Core controller FPGA
Generate voltage and the phasor diagram of current signal according to comprehensive judgement with algorithm controls, automatically carry out user's main transformer former simultaneously
Polygonal voltage, the self-adaptative adjustment of primary and secondary side electric current control.
5th step: according to grid-connected phase voltage U of the three-phase system detectedsa、Usb、UscPositive and negative phase sequence automatically adjust control
The three-phase modulations wave phase of device FPGA processed, by PWM inversion control, makes the superposition output electricity mutually of three-phase cascade d H-bridge inversion unit
Pressure Uoa、Uob、UocPhase place respectively with system grid connection phase voltage Usa、Usb、UscPhase place keep in the same direction.Export according to direct screening SVG
Capacitive idle with perception, it is judged that A, C phase Hall of H bridge inverter unit cascade output voltage phase place and direct screening SVG exports electric current
Ioa、IocPhase contrast, after comprehensive descision and algorithm controls, automatically adjust A, C phase Hall output electric current I of direct screening SVGoa、Ioc's
Phase place.
6th step: master controller DSP generates the phasor diagram of each sampled signal according to all of actual samples signal, with
And the theoretic former and deputy limit phase voltage phasor diagram of the connection group generation according to user's main transformer, and in operation note
Generate phase place and adjust record.
Claims (7)
1. based on many sampled signals Adaptive matching control a 35kV direct screening static reacance generator, including touch screen,
PLC, master controller DSP, core controller FPGA, filter circuit, discharge circuit and AD sample circuit, signal conditioning circuit, light
Fine, RS485, master controller DSP are furnished with operating system, and core controller FPGA is furnished with data handling system, it is characterised in that touch
Touching screen to connect PLC, PLC by RS 485 and connect master controller DSP by RS 485, PLC connects core controller by optical fiber
FPGA, master controller DSP are connected with core controller FPGA, and core controller FPGA connects filter circuit, discharge circuit and AD
Sample circuit, filter circuit, discharge circuit and AD sample circuit connect signal conditioning circuit, and core controller FPGA passes through optical fiber
Join even with H bridge inverter unit CPLD.
A kind of 35kV direct screening static reacance controlled based on many sampled signals Adaptive matching the most according to claim 1 is sent out
Raw device, it is characterised in that the connection of master controller DSP and core controller FPGA is by pin Hard link.
A kind of 35kV direct screening static reacance controlled based on many sampled signals Adaptive matching the most according to claim 1 is sent out
Raw device, it is characterised in that PLC is provided with two input ports and an output port.
A kind of 35kV direct screening static reacance controlled based on many sampled signals Adaptive matching the most according to claim 3 is sent out
Raw device, it is characterised in that two input ports that PLC is provided with connect transformator respectively and connect group setup unit and electrical network character
Setup unit.
A kind of 35kV direct screening static reacance controlled based on many sampled signals Adaptive matching the most according to claim 3 is sent out
Raw device, it is characterised in that the output port that PLC is provided with connects phase place and generates and adjust record and voltage, electric current phasor figure
Unit.
A kind of 35kV direct screening static reacance controlled based on many sampled signals Adaptive matching the most according to claim 1 is sent out
Raw device, it is characterised in that core controller FPGA uses the chip EP4CE115F23I7 of the Cyclone IV series of ALTRA.
A kind of 35kV direct screening static reacance controlled based on many sampled signals Adaptive matching the most according to claim 1 is sent out
Raw device, it is characterised in that core controller FPGA uses two optical fiber communications with H bridge inverter unit CPLD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620684272.2U CN205863936U (en) | 2016-07-01 | 2016-07-01 | A kind of 35kV direct screening static reacance generator controlled based on many sampled signals Adaptive matching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620684272.2U CN205863936U (en) | 2016-07-01 | 2016-07-01 | A kind of 35kV direct screening static reacance generator controlled based on many sampled signals Adaptive matching |
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| Publication Number | Publication Date |
|---|---|
| CN205863936U true CN205863936U (en) | 2017-01-04 |
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ID=57645202
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620684272.2U Expired - Fee Related CN205863936U (en) | 2016-07-01 | 2016-07-01 | A kind of 35kV direct screening static reacance generator controlled based on many sampled signals Adaptive matching |
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| CN (1) | CN205863936U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110771019A (en) * | 2017-06-21 | 2020-02-07 | Abb瑞士股份有限公司 | Model-based current control for three-phase to single-phase power converters |
| CN112003183A (en) * | 2020-08-06 | 2020-11-27 | 河南省同信电力工程有限公司 | Power transmission network fault processing system and method |
-
2016
- 2016-07-01 CN CN201620684272.2U patent/CN205863936U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110771019A (en) * | 2017-06-21 | 2020-02-07 | Abb瑞士股份有限公司 | Model-based current control for three-phase to single-phase power converters |
| CN110771019B (en) * | 2017-06-21 | 2021-10-19 | Abb电网瑞士股份公司 | Model-based current control for three-phase to single-phase power converters |
| CN112003183A (en) * | 2020-08-06 | 2020-11-27 | 河南省同信电力工程有限公司 | Power transmission network fault processing system and method |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20170104 Termination date: 20210701 |