WO2013085522A1 - Circuit de pilotage de cycloconvertisseur côté secondaire pour convertisseur résonant dans une application solaire - Google Patents

Circuit de pilotage de cycloconvertisseur côté secondaire pour convertisseur résonant dans une application solaire Download PDF

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Publication number
WO2013085522A1
WO2013085522A1 PCT/US2011/063979 US2011063979W WO2013085522A1 WO 2013085522 A1 WO2013085522 A1 WO 2013085522A1 US 2011063979 W US2011063979 W US 2011063979W WO 2013085522 A1 WO2013085522 A1 WO 2013085522A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
signal
current
high frequency
cycloconverter
Prior art date
Application number
PCT/US2011/063979
Other languages
English (en)
Inventor
Bruce Modick
Madhuwanti Joshi
Original Assignee
Petra Solar, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Petra Solar, Inc. filed Critical Petra Solar, Inc.
Priority to PCT/US2011/063979 priority Critical patent/WO2013085522A1/fr
Publication of WO2013085522A1 publication Critical patent/WO2013085522A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/4807—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode having a high frequency intermediate AC stage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Definitions

  • An apparatus may be provided.
  • the apparatus may comprise a cycloconverter and a gate driver.
  • the cycloconverter may comprise a plurality of switching pairs and may be configured to convert a second AC voltage to a third AC voltage.
  • the gate driver may be configured to alternately switch the plurality of switching pairs.
  • FIG. 1 shows a conventional semiconductor driver circuit
  • FIG. 2 shows a driver circuit including a cycloconverter with common source connections
  • FIG. 3 shows a driver circuit including a cycloconverter with common drain connections
  • FIG. 4 shows a gate driver circuit
  • Solar inverters may be faced with the challenges of minimum cost, maximum efficiency, and high operating life. With these challenges, selecting the right inverter topology may be important for the inverter.
  • the inverter topologies based on the resonant converter may become an attractive solution. They may comprise, for example, a cascade connection of MOSFETs/IGBTs connected in either a full bridge or a half bridge configuration, a resonant circuit consisting of series/parallel/series-parallel connections of inductors and capacitors, a high frequency transformer, diode rectifier, and either an unfolder or a high frequency inverter followed by passive filters. These types of converters may have low switching losses, less high frequency harmonics, and high DC to AC conversion efficiency.
  • Embodiments of the present invention may comprise a gate driver circuit design for a cycloconverter.
  • FIG. 1 shows a conventional semiconductor driver circuit.
  • the conventional semiconductor driver circuit comprises a high frequency DC switching stage consisting of four semiconductor switching devices Ql , Q2, Q3 and Q4, a resonant tank consisting of a series connection of an inductor and a capacitor, a high frequency transformer, a diode rectifier, and an unfolder that switches at the AC voltage frequency with four semiconductor switching devices Q5, Q6, Q7 and Q8.
  • the semiconductor devices such as MOSFETs, BJTs, IGBTs, thyristors, etc may be used in the high frequency switching stage or in the unfolder.
  • the DC switching stage may have the half bridge configuration or full bridge configuration.
  • the resonant stage may consist of either a series or parallel or a combination of series and parallel connection of one or more inductors and capacitors.
  • the DC switching network generates a high frequency AC voltage (also referred to as first AC) and an AC current at the primary of the transformer.
  • the transformer transforms the first AC voltage and current into a second AC voltage and AC current.
  • the rectifier and filter converts the second AC current into a second DC voltage which has a form of rectified sine wave.
  • the unfolder converts the second AC voltage into a low frequency AC voltage which is compatible to the grid voltage also referred to as third AC voltage.
  • Embodiments of the present invention may provide high frequency rectification and unfolding.
  • a driver for an unfolder may comprise a zero voltage detection circuit.
  • the zero voltage detection circuit may detect a zero crossing of an AC voltage in each cycle and may generate gate control signals for semiconductor devices (e.g. Q5, Q6, Q7 and Q8.)
  • the control signals may pass through an electrical isolation stage and then to a driver and buffering stage.
  • FIG. 2 shows a driver circuit 200 consistent with embodiments of the invention.
  • driver circuit 200 may comprise a power stage 205 along with a gate driver 210.
  • Power stage 205 may comprise, for example, a cascade connection of a high frequency direct current (DC) switching stage 215, a resonant circuit 220, a high frequency transformer 225, and a cycloconverter 230.
  • Resonant circuit 220 may comprise, for example, a series connection of an inductor 235 and a capacitor 240.
  • cycloconverter 230 may comprise, but is not limited to, common source connected MOSFETs.
  • Power stage 205 may comprise of one or multiple stages of DC switching stage 215, resonant circuit 220, high frequency transformer 225, and cycloconverter 230.
  • Power stage 205 may take a first voltage 245 (e.g. a DC voltage) and convert it to a second alternating current (AC) voltage 250 (e.g. a high frequency AC voltage).
  • Power stage 205 may then take second AC voltage 250 and convert it to a third AC voltage 255 (e.g. a low frequency AC voltage) with cycloconverter 230 driven by gate driver 210.
  • Cycloconverter 230 may combine the functionality of a high frequency rectifier and an unfolder into one stage.
  • driver circuit 200 may take energy from, a solar panel 260 and efficiently inject the energy into an AC source 265 (e.g. an electric utility grid.)
  • AC source 265 e.g. an electric utility grid.
  • Cycloconverter 230 may operate by alternate switching, for example, of devices switching pairs formed by Q5 and Q7 and Q6 and Q8 at switching frequency and at the frequency of third AC voltage.
  • third AC voltage 255 one of the switches from the switching pair switching in synchronization with the zero crossing instants of third AC voltage 255 may be kept on and the other switching pair may be switched on and off in synchronization with cycloconverter current sense signal 270 (e.g. a high frequency AC current.)
  • cycloconverter current sense signal 270 e.g. a high frequency AC current.
  • Opposite switching events may take place in the negative cycle of third AC voltage 255.
  • gate driver 210 may comprise a zero current detector 275, a zero voltage detector 280, a signal conditioner 285, an isolator 290, and a driver and buffer 295.
  • the switches Q5 and Q6 may be connected in two possible ways. Either their source may be shorted to each other (i.e. common source) as shown in cycloconverter 230 of FIG. 2 or their drains could be shorted to each other (i.e. common drain) as shown in cycloconverter 230' of FIG. 3.
  • the sequence of high frequency and low frequency switching may depend on the common source or common drain MOSFET configuration.
  • Table 1 One of the possible truth tables for the common source configuration is shown in Table 1.
  • FIG. 4 shows gate driver circuit 210 in greater detail.
  • gate driver 210 uses a current sense transducer 405 to obtain cycloconverter current sense signal 270 and a voltage sense transducer 410 to obtain third AC voltage 255.
  • Current sense transducer 405 may comprise a current sense transformer or current sensors with hall effect, or current sense resistors with an isolation amplifier.
  • Current sense transducer 405 may be located at the primary side in series with the primary of high frequency transformer 225 or on the secondary side in series with the secondary winding of high frequency transformer 225 as shown in Figs. 2 and 3.
  • Primary may mean the transformer winding at the solar panel side and the secondary winding may mean the transformer winding at the third AC voltage side.
  • the zero current detector 275 may detect the direction of cycloconverter current sense signal 270 (e.g. a high frequency AC current signal) and may generate a high frequency signal HF.
  • Voltage sense transducer 410 may be a resistor divider network or any other transducer.
  • Zero voltage detector circuit 280 may determine the polarity of third AC voltage 255 (e.g. a low frequency AC voltage signal) and may generate a low frequency signal LF.
  • signal conditioner 285 may be configured to implement the logic designated by the truth table of Table 1. As shown in Fig. 4, signal conditioner 285 may include a first signal inverter 415, a second signal inverter 420, and a logic OR circuit 425. First signal inverter 415 inverts the polarity of signal HF and second signal inverter 420 inverts the polarity of signal LF to respectively generate the signals HFN and LFN. First signal inverter 415 and/or a second signal inverter 420 may comprise any diode, opamp logic or any digital inverters.
  • Logic OR circuit 425 may combine signals LF, LFN, HF and HFN to create drive signals to drive switches Q5, Q6, Q7, and Q8 according to the truth table of Table 1.
  • Isolator 290 may isolate or level shift the output signals from logic OR circuit 425 and driver and buffer 295 may prepare and condition the isolated output signals to drive respective switches Q5, Q6, Q7, and Q8.
  • Embodiments of the invention may be practiced in an electrical circuit comprising discrete analog and digital electronic elements such as diodes, transistors, MOSFETs, packaged or integrated electronic chips containing logic gates, a circuit utilizing a microprocessor, or on a single chip containing electronic elements or microprocessors.
  • Embodiments of the invention may also be practiced using other technologies capable of performing logical operations such as, for example, AND, OR, and NOT, including but not limited to mechanical, optical, fluidic, and quantum technologies.
  • embodiments of the invention may be practiced within a general purpose computer or in any other circuits or systems.
  • Embodiments of the invention may be implemented as a computer process (method), a computing system, or as an article of manufacture, such as a computer program product or computer readable media.
  • the computer program product may be a computer storage media readable by a computer system and encoding a computer program of instructions for executing a computer process.
  • the computer program product may also be a propagated signal on a carrier readable by a computing system and encoding a computer program of instructions for executing a computer process.
  • the present invention may be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.).
  • embodiments of the present invention may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system.
  • a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
  • the computer-usable or computer-readable medium may be, for example but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. More specific computer-readable medium examples (a non-exhaustive list), the computer- readable medium may include the following: an electrical connection having one or more wires, a portable computer diskette, a random access memory (RAM), a read- only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, and a portable compact disc read-only memory (CD-ROM).
  • RAM random access memory
  • ROM read- only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM portable compact disc read-only memory
  • the computer-usable or computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
  • Embodiments of the present invention are described above with reference to block diagrams and/or operational illustrations of methods, systems, and computer program products according to embodiments of the invention.
  • the functions/acts noted in the blocks may occur out of the order as shown in any flowchart. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functional ity/acts involved.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un appareil pour convertir le CC en CA. L'appareil peut comprendre un étage d'alimentation (205) et un circuit d'attaque de grille (210) pour faire fonctionner l'étage d'alimentation (205). L'étage d'alimentation (205) peut comprendre un circuit résonant (220) connecté à une source CC d'énergie solaire. Le circuit résonant (220) peut être connecté à un cycloconvertisseur (230). Le cycloconvertisseur peut comprendre une pluralité de paires de commutation. Le circuit d'attaque de grille (210) peut commander l'étage d'alimentation (205) en actionnant la pluralité de paires de commutation.
PCT/US2011/063979 2011-12-08 2011-12-08 Circuit de pilotage de cycloconvertisseur côté secondaire pour convertisseur résonant dans une application solaire WO2013085522A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2011/063979 WO2013085522A1 (fr) 2011-12-08 2011-12-08 Circuit de pilotage de cycloconvertisseur côté secondaire pour convertisseur résonant dans une application solaire

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Application Number Priority Date Filing Date Title
PCT/US2011/063979 WO2013085522A1 (fr) 2011-12-08 2011-12-08 Circuit de pilotage de cycloconvertisseur côté secondaire pour convertisseur résonant dans une application solaire

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WO2013085522A1 true WO2013085522A1 (fr) 2013-06-13

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105375525A (zh) * 2015-12-13 2016-03-02 北京风光天赋科技有限公司 一种应用于光伏电站的智能柔性开关装置
CN106154034A (zh) * 2015-04-14 2016-11-23 艾默生网络能源有限公司 一种功率模块的谐波测量装置和方法
EP3210295A4 (fr) * 2014-10-20 2018-05-23 Momentum Dynamics Corporation Procédé et appareil de correction de facteur de puissance intrinsèque
CN114884336A (zh) * 2022-07-01 2022-08-09 杭州禾迈电力电子股份有限公司 Dc/ac变换电路及其控制方法、周波变换器的调制方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011091249A2 (fr) * 2010-01-22 2011-07-28 Massachusetts Institute Of Technology Circuits de conversion de puissance reliés à une grille et techniques associées

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WO2011091249A2 (fr) * 2010-01-22 2011-07-28 Massachusetts Institute Of Technology Circuits de conversion de puissance reliés à une grille et techniques associées

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PINHEIRO H ET AL: "Zero voltage switching series resonant based DC-AC converter", ELECTRICAL AND COMPUTER ENGINEERING, 1998. IEEE CANADIAN CONFERENCE ON WATERLOO, ONT., CANADA 24-28 MAY 1998, NEW YORK, NY, USA,IEEE, US, vol. 2, 24 May 1998 (1998-05-24), pages 549 - 552, XP010284939, ISBN: 978-0-7803-4314-6, DOI: 10.1109/CCECE.1998.685555 *
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3210295A4 (fr) * 2014-10-20 2018-05-23 Momentum Dynamics Corporation Procédé et appareil de correction de facteur de puissance intrinsèque
CN106154034A (zh) * 2015-04-14 2016-11-23 艾默生网络能源有限公司 一种功率模块的谐波测量装置和方法
CN105375525A (zh) * 2015-12-13 2016-03-02 北京风光天赋科技有限公司 一种应用于光伏电站的智能柔性开关装置
CN114884336A (zh) * 2022-07-01 2022-08-09 杭州禾迈电力电子股份有限公司 Dc/ac变换电路及其控制方法、周波变换器的调制方法
CN114884336B (zh) * 2022-07-01 2022-09-16 杭州禾迈电力电子股份有限公司 Dc/ac变换电路及其控制方法、周波变换器的调制方法

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