CN202282616U - Control circuit for static var generator (SVG) - Google Patents
Control circuit for static var generator (SVG) Download PDFInfo
- Publication number
- CN202282616U CN202282616U CN2011204214196U CN201120421419U CN202282616U CN 202282616 U CN202282616 U CN 202282616U CN 2011204214196 U CN2011204214196 U CN 2011204214196U CN 201120421419 U CN201120421419 U CN 201120421419U CN 202282616 U CN202282616 U CN 202282616U
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- control circuit
- fpga
- programmable gate
- gate array
- field programmable
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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]
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Abstract
The utility model relates to the technical field of alternating current power distribution and transmission of power systems, in particular to a control circuit for a static var generator (SVG). A three-phase modulation wave required by a field programmable gate array (FPGA) is obtained by acquiring and processing network side voltage, network side current and load current signals by a digital signal processor (DSP) according to an algorithm and transmitted to the FPGA; the FPGA receives the data and outputs a multi-path pulse width modulation (PWM) control signal after a monopole frequency doubling carrier phase shift technology is realized in the FPGA; and a power module is used for supplying power to the control circuit. According to the control circuit, an expensive and heavy multiple transformer is not needed, so that the control circuit is more convenient to design; the cost is reduced; and the batch production is facilitated.
Description
Technical field
The utility model relates to electric power system alternating current distribution technology of transmission of electricity field, is specifically related to a kind of control circuit of SVG static reactive generator.
Background technology
SVG static reactive generator utilizes exactly from the commutation bridge circuit and perhaps is directly parallel on the electrical network through reactor; Suitably regulate the phase place and the amplitude of bridge circuit AC side output voltage; Perhaps directly control its ac-side current; This circuit is absorbed perhaps send the reactive current that meets the demands, realize the purpose of dynamic passive compensation.At China flexible AC transmitting system FACTS,, obtained develop rapidly as the new technology that can effectively improve the quality of power supply.As a core technology in the flexible AC transmitting system, power distribution network STATCOM D-STATCOM is because its advanced control performance and good compensation effect make it become the focus of current electric power system flexible AC transmission equipment development.Because the development of power distribution network STATCOM D-STATCOM technology has driven the innovation of its system control scheme and the upgrading of corresponding controllers, make controller of today replace original single-chip control by multicore sheet division of labor framework.The utility model is exactly the requirement to flexible transmission, is the control circuit of a kind of SVG static reactive generator of developing of control core strategy according to DSP digital signal processor and FPGA field programmable gate array.This circuit level is high, control ability is strong, can realize high-speed, the high-precision requirement of control procedure, but also have stronger antijamming capability.
Summary of the invention
Requirement according to dynamic response, compensation effect and the compensation capacity of SVG static reactive generator; Adopt the STATCOM topological structure of cascaded inverter structure; With carrier phase sinusoidal pulse width modulation technology Carrier phase-shifted SPWM, be called for short CPS-SPWM and replace the power frequency modulation.This scheme has realized: the output effect that 1, obtains higher equivalent switching frequency with lower switching frequency; 2, cancel expensive, heavy multipleization transformer, made design of Controller more convenient, controlled design cost; 3, according to the requirement of system balance capacity, only need to increase the number of each phase inversion power cell on the hardware, software cooperates hardware adjustment power cell phase angle to get final product.
For achieving the above object; The technical scheme that the utility model adopted is: a kind of control circuit of SVG static reactive generator is made up of DSP digital signal processor, PGA field programmable gate array unit, power module; It is characterized in that: the DSP digital signal processor is connected with the FPGA field programmable gate array unit signal of telecommunication, and power module is connected with FPGA field programmable gate array unit with the DSP digital signal processor respectively.
The utility model is to gather, handle voltage on line side, electric current and load current signal through the DSP digital signal processor; Draw the needed three-phase modulations ripple of FPGA field programmable gate array and pass to the FPGA field programmable gate array through algorithm; Realize the output of multi-channel PWM control signal after FPGA field programmable gate array reception data and the one pole of the portion's completion within it frequency multiplication phase-shifting carrier wave technology, power module is DSP digital signal processor and the power supply of FPGA field programmable gate array unit.
The utility model also possesses following technical characterictic:
1, described DSP digital signal processor is to be main control chip with TMS28335;
2, described FPGA field programmable gate array unit is to be main control chip with EPIC12Q240.
The utility model integrated level is high, control ability is strong, can realize high-speed, the high-precision requirement of control procedure, but also have stronger antijamming capability.
Description of drawings:
Fig. 1 is the structural principle block diagram of the utility model; Wherein 1, the DSP digital signal processor, 2, FPGA field programmable gate array unit, 3, power module;
Fig. 2 is a DSP digital signal processor power circuit diagram;
Fig. 3 is a FPGA field programmable gate array unit power circuit diagram;
Fig. 4 produces circuit diagram for analog circuit 1.5V;
Fig. 5 is the control circuit theory diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further explanation:
A kind of control circuit of SVG static reactive generator is the requirement according to dynamic response, compensation effect and the compensation capacity of SVG static reactive generator; Adopt the STATCOM topological structure of cascaded inverter structure; With carrier phase sinusoidal pulse width modulation technology Carrier phase-shifted SPWM, be called for short CPS-SPWM and replace the power frequency modulation.This circuit is made up of DSP digital signal processor, FPGA field programmable gate array unit, power module, and the DSP digital signal processor is connected with the FPGA field programmable gate array unit signal of telecommunication, power module is connected with FPGA field programmable gate array unit with the DSP digital signal processor respectively.The utility model is to gather, handle voltage on line side, electric current and load current signal through the DSP digital signal processor; Draw the needed three-phase modulations ripple of FPGA field programmable gate array and pass to FPGA field programmable gate array unit through algorithm; Realize the output of multi-channel PWM control signal after FPGA field programmable gate array unit reception data and the one pole of the portion's realization within it frequency multiplication phase-shifting carrier wave technology, power module is DSP signal processor and the power supply of FPGA field programmable gate array unit.
The utility model is a kind of based on parallelly connected STATCOM control system institute designed circuit; SVG control circuit to the parallel connection of H bridge unit; Realization be main, FPGA with DSP for from; Through bus data or instruction of PWM mode transmitting control and signal, realize the control requirement in unipolarity frequency multiplication phase-shifting carrier wave, dead band in FPGA.As a type of SVG reactive power compensation; Not only dynamic response is fast; Compensation effect is good; And because of series of advantages such as H bridge unit shunt chopper has that identical, the used parts number of cellular construction is few, the modularized design that is easy to realize circuit and encapsulation, so can get final product through the corresponding plus-minus of the capacity main circuit H bridge power unit quantity that needs compensation.
In the STATCOM system, because DC side need not provide active power, the advantage of parallelly connected H bridge inverter can be fully played.Realize that on this hardware circuit basis one pole frequency multiplication CPS-SPWM modulation strategy replaces the power frequency modulation; Can make device under lower switching frequency, realize higher equivalent switching frequency; And the 2N that equivalent switching frequency is risen to the actual switch frequency doubly, makes the low-order harmonic filtering more easily of device.
The utility model also possesses following technical characterictic:
1, described DSP digital signal processor is to be main control chip with TMS320F28335;
2, to be enough to EPIC12Q240 be main control chip in described FPGA field programmable gate array unit.
Specific embodiment:
1, TMS28335 among the DSP and simulated modulation circuit application thereof
In the STATCOM system, the TMS320F28335 on the controller among the DSP not only will accomplish collection of simulant signal and corresponding algorithm computation, also will accomplish data and control signal transmission etc. between FPGA.Compare the DSP2812 of fixed point, floating-point TMS320F28335 can improve nearly three times algorithm process speed, and like this under certain sample frequency and switching frequency, the data volume of the formation modulating wave that transmits to FPGA has just increased, and is tending towards sinusoidal wave more.
Aspect the simulated modulation circuit, the analog signal of adopting through instrument transformer or Hall element through signal regulating panel reach the author designed circuit receptible peak value be the of ac of 3V, become DSP acceptable 0～3V voltage signal through this circuit conversion again.
Analog signal conditioner partly is the two stage amplifer conditioning, use principle satisfy transfer function Vout=-1/2*Vin+1.5V with peak value be the of ac of 3V convert 0 into～+ the 3V ac voltage signal.For TMS320F28335, can not directly utilize the voltage of its AD internal reference source output.For this reason; 1.5V voltage in the transfer function needs external circuit to supply with; Promptly the accurate voltage of 2.048V can be drawn through REF3020, through the amplifier INA159 output 1V of input one end ground connection, needed 1.5V reference voltage can be obtained through another INA159 amplifier at last again by 3.3V.
2, FPGA carrier modulation output circuit
The modulating wave that control algolithm draws after accomplishing will pass to FPGA field programmable gate array unit by the DSP digital signal processor.On hardware circuit, FPGA receives DSP external data bus signal on the one hand, selects and control FPGA through address wire, sheet choosing and relevant control signal; FPGA also receives 12 road pwm signals that DSP hardware generates on the other hand, and carries out signal processing algorithm.Be to receive data or pwm signal, the algorithm that depends primarily on FPGA on the STATCOM system controller is implemented.
Because the utility model has been cancelled expensive, heavy multipleization transformer, makes design of Controller more convenient, cost descends, and is convenient to mass production.
Claims (3)
1. the control circuit of a SVG static reactive generator is made up of DSP digital signal processor, FPGA field programmable gate array unit, power module; It is characterized in that: the DSP digital signal processor is connected with the FPGA field programmable gate array unit signal of telecommunication, and power module is connected with FPGA field programmable gate array unit with the DSP digital signal processor respectively.
2. the control circuit of a kind of SVG static reactive generator according to claim 1 is characterized in that: described DSP digital signal processor is to be main control chip with TMS28335.
3. the control circuit of a kind of SVG static reactive generator according to claim 1 is characterized in that: described FPGA field programmable gate array unit is to be main control chip with EPIC12Q240.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204214196U CN202282616U (en) | 2011-10-30 | 2011-10-30 | Control circuit for static var generator (SVG) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204214196U CN202282616U (en) | 2011-10-30 | 2011-10-30 | Control circuit for static var generator (SVG) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202282616U true CN202282616U (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204214196U Expired - Fee Related CN202282616U (en) | 2011-10-30 | 2011-10-30 | Control circuit for static var generator (SVG) |
Country Status (1)
| Country | Link |
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| CN (1) | CN202282616U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981438A (en) * | 2012-12-10 | 2013-03-20 | 哈尔滨九洲电气股份有限公司 | Multi-power-unit tandem FPGA control device and control method for chain type SVG |
-
2011
- 2011-10-30 CN CN2011204214196U patent/CN202282616U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981438A (en) * | 2012-12-10 | 2013-03-20 | 哈尔滨九洲电气股份有限公司 | Multi-power-unit tandem FPGA control device and control method for chain type SVG |
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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 |
Granted publication date: 20120620 Termination date: 20171030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |