WO2014005281A1 - Procédé de commande de poursuite du point de puissance solaire maximale et système de lampe sans électrode - Google Patents

Procédé de commande de poursuite du point de puissance solaire maximale et système de lampe sans électrode Download PDF

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Publication number
WO2014005281A1
WO2014005281A1 PCT/CN2012/078112 CN2012078112W WO2014005281A1 WO 2014005281 A1 WO2014005281 A1 WO 2014005281A1 CN 2012078112 W CN2012078112 W CN 2012078112W WO 2014005281 A1 WO2014005281 A1 WO 2014005281A1
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WO
WIPO (PCT)
Prior art keywords
voltage
duty cycle
real
time digital
solar
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PCT/CN2012/078112
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English (en)
Chinese (zh)
Inventor
肖蓉
张京玲
何文丰
谭国振
黄培先
龙佳乐
Original Assignee
广东电力士照明科技有限公司
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Application filed by 广东电力士照明科技有限公司 filed Critical 广东电力士照明科技有限公司
Priority to PCT/CN2012/078112 priority Critical patent/WO2014005281A1/fr
Publication of WO2014005281A1 publication Critical patent/WO2014005281A1/fr

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/66—Regulating electric power
    • G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/2806—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without electrodes in the vessel, e.g. surface discharge lamps, electrodeless discharge lamps
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the present invention relates to solar energy tracking technology, and more particularly to a method for solar energy maximum power tracking control and an electrodeless lamp system.
  • the application number is 200710150685.8, and the name is “Digital Signal Processor-based Photovoltaic Power Generation Maximum Power Tracking Control Device”. It is realized by the conductance increment method.
  • the maximum power point tracking is realized by adjusting the system operating voltage to gradually approach the maximum power point voltage. Disturbance observation method finds the maximum power point from the disturbance terminal voltage according to the power-voltage characteristics of the photovoltaic cell.
  • the maximum power tracking control of the solar energy has problems such as low output efficiency, low tracking accuracy, high cost, and even tracking failure.
  • the main object of the present invention is to provide a method for solar maximum power tracking control and an electrodeless lamp system with high output efficiency, high tracking accuracy, and low cost.
  • the first technical solution proposed by the present invention is:
  • a method for solar energy maximum power tracking control comprising the following steps:
  • Step 2 According to the detected real-time digital DC voltage of the solar cell and the real-time digital DC current, obtain the real-time digital power of the solar cell, which is a natural number.
  • Step 3 Compare / ⁇ ) > / ⁇ - 1) Is it true: If yes, go to step 4; if not, go to step 5.
  • Step 4 using pulse width modulation to change the duty cycle of the driving signal ⁇ ; fc), keeping the disturbance direction of the real-time digital DC voltage unchanged: maintaining the duty cycle of the driving signal ⁇ ; fc) is increasing or decreasing; Step 6.
  • Step 5 using pulse width modulation to change the duty cycle of the driving signal ⁇ ; fc), changing the disturbance direction of the real-time digital DC voltage: changing the duty ratio of the driving signal ⁇ to the increasing state of the driving signal q ⁇ J is a reduced state; a state in which the duty ratio q ⁇ J of the drive signal is decreased is changed to a duty ratio of the drive signal ⁇ ; fc) is an increased state; thereafter, step 6 is performed.
  • Step 6. Determine whether
  • Step 7 Adjust the duty cycle step according to the amount of change of the real-time digital DC voltage ⁇ £ /
  • Step 8 According to the amount of change of the real-time digital DC voltage ⁇ £/ adjust the duty cycle step:
  • Step 9 The duty ratio of the driving signal determined according to the duty cycle step ⁇ ; fc); adjust the real-time digital DC voltage according to the duty ratio of the driving signal ⁇ ; fc) to achieve maximum power tracking of the solar energy.
  • the second technical solution proposed by the present invention is:
  • Real-time digital DC current acquires real-time digital power to obtain the maximum power reference point voltage of the solar cell, and performs solar energy on the real-time digital DC voltage
  • Maximum output power tracking According to the increase or decrease of the real-time digital power, the pulse width modulation is used to change the duty cycle of the driving signal ⁇ ; fc), and the disturbance direction of the real-time digital DC voltage (fc) is maintained or changed accordingly; When detecting that the DC voltage with the maximum output power is overvoltage, the pulse width modulation is used to change the duty cycle of the driving signal ⁇ ; fc) to reduce the real-time digital DC voltage.
  • the transformer is also used to preset the maximum duty cycle step max and the minimum duty cycle step mm .
  • Grid-connected inverter DC with maximum output power for transmitting solar electrodeless ballasts After the voltage is converted into an AC voltage of the same frequency and in phase with the grid, the AC voltage is sent to the induction lamp.
  • the electrodeless lamp is used for converting the alternating voltage sent by the grid-connected inverter from electric energy into magnetic energy, and driving the lamp to emit light in the form of an alternating magnetic field.
  • the third technical solution proposed by the present invention is:
  • An electrodeless lamp system with solar energy maximum power tracking control including a solar energy ballast ballast, a battery, an electrodeless lamp;
  • Real-time digital DC current acquires real-time digital power to obtain the maximum power reference point voltage of the solar cell, and performs solar energy on the real-time digital DC voltage
  • Maximum output power tracking According to the increase or decrease of real-time digital power, the pulse-width modulation is used to change the duty cycle of the driving signal ⁇ ; fc), and the real-time digital DC voltage is maintained or changed accordingly (the disturbance direction of W; when detecting When the DC voltage with the maximum output power is overvoltage, the pulse width modulation is used to change the duty cycle of the driving signal ⁇ ; fc) to reduce the real-time digital DC voltage.
  • a max and minimum duty cycle step mm A max and minimum duty cycle step mm .
  • the battery on the one hand, is used to store the DC voltage with the maximum output power sent by the solar electrodeless ballast; on the other hand, it is used to send its own stored electrical energy to the electrodeless lamp.
  • An electrodeless lamp for converting electrical energy transmitted by a battery into magnetic energy to drive the lamp to emit light in the form of an alternating magnetic field.
  • the method for solar energy maximum power tracking control is based on the obtained solar energy maximum power reference point; when the real-time digital power of the solar cell is increasing, the pulse width is adopted.
  • the modulation changes the duty ratio of the driving signal to keep the disturbance direction of the real-time digital DC voltage unchanged.
  • the pulse-width modulation is used to change the duty ratio of the driving signal to change the real-time digital DC voltage.
  • the direction of the disturbance; further, the method of changing the duty cycle of the driving signal is realized by adjusting the duty cycle step according to the variation of the real-time digital DC voltage: The variation of the real-time digital DC voltage is different, and the duty cycle step is different.
  • the duty cycle is changed by changing the duty cycle step to adjust the real-time digital DC voltage in real time to achieve tracking with maximum solar power. Since the present invention adjusts the duty cycle step according to the amount of change of the real-time digital DC voltage, the present invention has the characteristics of high output efficiency, good tracking effect, and low cost.
  • the solar electrodeless lamp ballast adopts the method of solar maximum power tracking control according to the invention to real-time adjust the real-time digital DC voltage to obtain the maximum power of solar energy. DC voltage, and the finally obtained DC voltage is sent to the electrodeless lamp through the grid-connected inverter or battery; therefore, the electrodeless lamp system with solar maximum power tracking control of the invention also has high output efficiency and good tracking effect. , low cost features.
  • FIG. 1 is a schematic flow chart of a method for controlling maximum power tracking of solar energy according to the present invention
  • FIG. 2 is a schematic diagram showing an output characteristic curve of a photovoltaic cell according to the present invention
  • FIG. 3 is a first structural schematic view of an electrodeless lamp system with solar energy maximum power tracking control according to the present invention
  • FIG. 4 is a second structural schematic diagram of an electrodeless lamp system with solar energy maximum power tracking control according to the present invention.
  • 5 is a schematic structural diagram of a solar energy ballast ballast with solar energy maximum power tracking control according to the present invention
  • 6 is a schematic structural diagram of a structure of the single chip microcomputer according to the present invention
  • FIG. 7 is a schematic structural diagram of a DC/DC converter according to the present invention.
  • FIG. 8 is a schematic structural diagram of a Buck-Boost circuit according to the present invention.
  • FIG. 1 is a schematic flow chart of a method for solar energy maximum power tracking control according to the present invention. As shown in FIG. 1, the method for solar energy maximum power tracking control according to the present invention comprises the following steps:
  • Step 2 According to the detected real-time digital DC voltage of the solar cell and the real-time digital DC current, obtain the real-time digital power of the solar cell, which is a natural number.
  • Step 3 Compare / ⁇ ) > / ⁇ - 1) Is it true: If yes, go to step 4; if not, go to step 5.
  • Step 4 using pulse width modulation to change the duty cycle of the driving signal ⁇ ; fc), keeping the disturbance direction of the real-time digital DC voltage unchanged: maintaining the duty cycle of the driving signal ⁇ ; fc) is increasing or decreasing; Step 6.
  • the disturbance direction of the real-time digital DC voltage is kept unchanged: If the real-time digital DC voltage ⁇ - 1) is increased at the previous moment, the pulse-width modulation is used to change the duty cycle of the drive signal q (k) to maintain the real-time number. The DC voltage is increased; if the real-time digital DC voltage u(k - 1) is decreased at the previous moment, the real-time digital DC voltage u(k) is kept decreasing by using pulse width modulation to change the duty ratio of the driving signal. .
  • Step 5 using pulse width modulation to change the duty cycle of the driving signal ⁇ ; fc), changing the disturbance direction of the real-time digital DC voltage: changing the duty ratio of the driving signal ⁇ to the increasing state of the driving signal q ⁇ J is a reduced state; a state in which the duty ratio q ⁇ J of the drive signal is decreased is changed to a duty ratio of the drive signal ⁇ ; fc) is an increased state; thereafter, step 6 is performed.
  • the disturbance direction of changing the real-time digital DC voltage is: If the real-time digital DC voltage ⁇ - 1) is increased at the previous moment, the pulse-width modulation is used to change the duty cycle of the drive signal q (k) to reduce the real-time digital DC voltage. If the real-time digital DC voltage M(fc-1) is reduced at the previous moment, the pulse-width modulation is used to change the duty cycle q of the drive signal (Jc increases the real-time digital DC voltage u(k, step 6. judgment) t/ Rf - W (fc)
  • Step 8 According to the amount of change of the real-time digital DC voltage ⁇ £/ adjust the duty cycle step:
  • Step 9 The duty ratio of the driving signal determined according to the duty cycle step ⁇ ; fc); adjusting the real-time digital DC voltage according to the duty ratio of the driving signal ⁇ ; fc) to achieve the maximum power tracking of the solar energy.
  • the control method with solar maximum power tracking of the present invention first obtains the maximum power reference point of the solar cell; secondly, when the real-time digital power of the solar cell is increasing, the pulse width modulation is used to change the duty ratio of the driving signal, Keeping the disturbance direction of the real-time digital DC voltage unchanged; when the real-time digital power of the solar cell is decreasing, the pulse width modulation is used to change the duty ratio of the driving signal, and the disturbance direction of the real-time digital DC voltage is changed; further, the driving signal is changed.
  • the method of the air ratio is realized by adjusting the duty cycle step according to the change amount of the real-time digital DC voltage:
  • the change amount of the real-time digital DC voltage is different, and the duty cycle step is different.
  • Real-time digital DC voltage is adjusted in real time by changing the duty cycle step by changing the duty cycle: that is, increasing the duty cycle of the drive signal can increase the real-time digital DC voltage; reducing the duty cycle of the drive signal, The real-time digital DC voltage can be reduced; thus, the pulse-width modulated real-time digital DC voltage can track the maximum power reference point voltage to achieve tracking with maximum solar power. Since the present invention adjusts the duty cycle step according to the amount of change of the real-time digital DC voltage, the present invention has the characteristics of high output efficiency, good tracking effect, and low cost.
  • FIG. 2 is a schematic view showing an output characteristic curve of a photovoltaic cell in the present invention.
  • the output of the solar photovoltaic cell corresponds to different characteristic curves under different illumination conditions; the trajectory of the maximum power point of the solar photovoltaic cell is close to the power trajectory at a constant voltage of the photovoltaic cell.
  • the open circuit voltage i/ is taken. 76% of c is the voltage at the maximum power point of the solar photovoltaic cell.
  • the method before step 1, the method further includes:
  • Step a Set the initial value of the duty cycle step ⁇ to 5%.
  • Step b preset maximum duty cycle step size A max and minimum duty cycle step size A min
  • the minimum duty cycle step size can be designed according to the actual situation. For example, the minimum duty cycle step can be selected as 1%.
  • the amount of change ⁇ of the duty cycle step is the minimum duty step step min .
  • it also includes:
  • FIG. 3 is a schematic diagram showing the first composition structure of the electrodeless lamp system with solar maximum power tracking control according to the present invention.
  • the electrodeless lamp system with solar maximum power tracking control of the present invention includes a solar electrodeless lamp ballast 1, a grid-connected inverter 2, an electrodeless lamp 3;
  • Solar induction lamp ballast 1 for real-time digital DC voltage u(k) of the photovoltaic cell obtained according to the detection.
  • Real-time digital DC current acquires real-time digital power to obtain the maximum power reference point voltage of the solar cell, and performs real-time digital DC voltage Solar maximum output power tracking:
  • the pulse width modulation is used to change the duty cycle of the driving signal ⁇ ; fc), and the disturbance direction of the real-time digital DC voltage (fc) is maintained or changed accordingly;
  • the pulse width modulation is used to change the duty cycle of the driving signal ⁇ ; fc) to reduce the real-time digital DC voltage.
  • the grid-connected inverter 2 is configured to convert the DC voltage with the maximum output power sent by the solar electrodeless lamp ballast 1 into an AC voltage of the same frequency and in phase with the grid, and then send the AC voltage to the electrodeless lamp 3 .
  • the electrodeless lamp 3 is used for converting the AC voltage sent by the grid-connected inverter 2 into electric energy, and driving the lamp to emit light in the form of an alternating magnetic field.
  • FIG. 4 is a schematic view showing a second composition structure of an electrodeless lamp system with solar energy maximum power tracking control according to the present invention. As shown in FIG. 4, the present invention has the maximum power tracking control of solar energy
  • the lamp system comprises a solar energy ballast ballast 1, a battery 4, an electrodeless lamp 3;
  • Solar induction lamp ballast 1 for real-time digital DC voltage u(k) of the photovoltaic cell obtained according to the detection.
  • Real-time digital DC current acquires real-time digital power to obtain the maximum power reference point voltage of the solar cell, and performs real-time digital DC voltage Solar maximum output power tracking:
  • the pulse width modulation is used to change the duty cycle of the driving signal ⁇ ; fc), and the disturbance direction of the real-time digital DC voltage (fc) is maintained or changed accordingly;
  • the pulse width modulation is used to change the duty cycle of the driving signal ⁇ ; fc) to reduce the real-time digital DC voltage.
  • the battery 4 on the one hand, is used to store the DC voltage of the maximum output power transmitted by the solar electrodeless ballast 1; on the other hand, it is used to transmit its own stored electrical energy to the electrodeless lamp 3.
  • the electrodeless lamp 3 is used for converting the electric energy sent by the battery 4 into magnetic energy, and driving the lamp to emit light in the form of an alternating magnetic field.
  • the solar energy electrodeless ballast first obtains the solar maximum power reference point; when the real-time digital power of the solar cell increases The pulse width modulation is used to change the duty ratio of the driving signal, and the disturbance direction of the real-time digital DC voltage is kept unchanged; when the real-time digital power of the solar battery is decreasing, the pulse width modulation is used to change the duty ratio of the driving signal, and the mode is changed.
  • the direction of disturbance of the real-time digital DC voltage; further, the method of changing the duty cycle of the drive signal is based on whether
  • the digital DC voltage is adjusted in real time to obtain a DC voltage with maximum solar power.
  • the grid-connected inverter or battery adds a DC voltage with maximum solar power to the electrodeless lamp to realize an electrodeless lamp system with maximum solar power tracking control. Because the invention adjusts the duty cycle step according to the variation of the real-time digital DC voltage to realize the maximum power tracking of the solar energy, the invention has the characteristics of high output efficiency, good tracking effect and low cost.
  • FIG. 5 is a schematic structural diagram of a solar energy ballast ballast with solar energy maximum power tracking control according to the present invention.
  • the solar electrodeless ballast 1 includes a DC/DC converter 11, a detection module 12, a control module 13, a driving module 14, and a protection module 15; ,
  • the DC/DC converter 11 is configured to perform input filtering on the real-time analog DC voltage outputted by the photovoltaic cell, perform pulse width modulation processing under the control of the driving voltage sent by the driving module 14, and perform output filtering on the obtained DC ripple voltage. After the processing, the obtained filtered DC ripple voltage is sent to the protection module 15, the grid-connected inverter 2 or the battery 4.
  • the detecting module 12 is configured to send the real-time analog DC voltage ⁇ ( ⁇ ) and the real-time analog DC current 0 of the detected photovoltaic cell output to the control module 13.
  • the control module 13 is configured to preset a maximum duty cycle step size max and a minimum duty cycle step min ; for detecting an adjustment signal sent by the protection module 15; when the adjustment signal sent by the protection module 15 is not detected, acquiring the solar energy
  • the maximum power reference point voltage of the battery and according to the real-time analog DC voltage sent by the detection module 12 (the real-time digital DC voltage obtained by analog-to-digital conversion of the real-time analog DC current 0), real-time digital DC current to obtain real-time digital Power based on real-time digital work Increasing or decreasing the rate, using pulse width modulation to change the duty cycle of the driving signal ⁇ ; fc), correspondingly maintaining or changing the disturbance direction of the real-time digital DC voltage; further, according to
  • the driving module 14 transmits a driving signal obtained by boosting the driving control signal sent from the control module 13 to the DC/DC converter 11.
  • the driving module 14 is a prior art, and details are not described herein again.
  • the protection module 15 is configured to detect a DC voltage having a maximum output power outputted by the DC/DC converter 11, and generate an adjustment signal when the DC voltage having the maximum output power is overvoltage; and send the adjustment signal to the control module 13.
  • the control module 13 is a single chip microcomputer.
  • Fig. 6 is a schematic view showing the structure of a single chip microcomputer according to the present invention.
  • the single chip microcomputer includes an analog/digital conversion unit 1311, an input/output unit 1312, and a central processing unit 1313;
  • the analog/digital conversion unit 1311 is configured to perform real-time digital DC voltage M(fc) after performing analog/digital conversion on the real-time analog DC voltage ⁇ ( ⁇ ) and real-time analog DC current ( ⁇ ) sent by the detection module 12,
  • the real-time digital direct current (fc) is sent to the central processing unit 1313.
  • the input/output unit 1312 is configured to forward the adjustment signal sent by the protection module 15 to the central processing unit 1313.
  • the central processing unit 1313 is configured to preset a maximum duty cycle step and a minimum duty step for detecting an adjustment signal sent by the input/output unit 1312; when the adjustment signal sent by the input/output unit 1312 is not detected. , obtain the maximum power reference point voltage of the solar cell, according to analog/digital conversion
  • the real-time digital DC voltage (fc) sent by the unit 1311 and the real-time digital DC current obtain real-time digital power according to the increase or decrease of the real-time digital power, and the pulse width modulation is used to change the duty ratio of the driving signal ⁇ ; fc), correspondingly Maintaining or changing the disturbance direction of the real-time digital DC voltage; further, determining whether the duty ratio of the real-time digital DC voltage is ⁇ £/ according to whether
  • Fig. 7 is a schematic view showing the structure of a DC/DC converter according to the present invention.
  • the DC/DC converter 11 of the present invention includes an input filter circuit 111, a Buck-Boost circuit 112, and an output filter circuit 113;
  • the input filter circuit 111 is configured to perform input filtering processing on the real-time analog DC voltage outputted by the photovoltaic cell, and send the obtained input filter voltage to the Buck-Boost circuit 112.
  • the Buck-Boost circuit 112 is configured to control the on-time or the off-time of the input filter voltage according to the driving voltage sent by the driving module 14, to obtain a DC ripple voltage, and send the DC ripple voltage to the output filter circuit 113.
  • the output filter circuit 113 is configured to perform output filtering processing on the DC ripple voltage sent by the Buck-Boost circuit 112, and send the obtained DC voltage having the maximum output power to the protection module 15, the grid-connected inverter 2 or the battery 4.
  • FIG. 8 is a schematic structural diagram of a Buck-Boost circuit according to the present invention.
  • the Buck-Boost circuit 112 includes a FET VS, a storage inductor L, an output diode VD1, a storage capacitor ⁇ , and a fast recovery diode VD2.
  • the storage inductor output diode VD1 and the storage capacitor C are formed.
  • the gate G of the FET VS is connected to the output end of the driving module 14, field effect
  • the source of the VS is connected to the anode of the photovoltaic cell, and the drain of the FET VS is simultaneously connected to the end of the storage inductor L and the cathode of the output diode VD1; the anode of the output diode VD1 serves as the output of the Buck-Boost circuit 112.
  • the negative terminal is connected to the negative terminal of the input terminal of the output filter circuit 113, and the negative electrode of the storage capacitor C is connected to the negative electrode.
  • the negative terminal of the photovoltaic cell, the other end of the storage inductor L, and the positive terminal of the storage capacitor C are all connected to the output filter circuit 113.
  • the input terminal is positive; a fast recovery diode VD2 is connected between the source of the FET VS and the drain of the FET VS, and the source of the FET VS is connected to the cathode of the fast recovery diode VD2, the FET VS The drain is connected to the anode of the fast recovery diode VD2.
  • the field effect transistor VS is configured to be turned on or off under the control of the driving signal sent by the driving module 14, and obtain an initial pulse width modulation voltage according to the on time or the off time; and send the initial pulse width modulation voltage to the direct current Filter circuit
  • a DC filter circuit is used to filter the initial pulse width modulation voltage sent by the FET VS to obtain a DC ripple voltage.
  • the disturbance direction of the real-time digital DC voltage is kept unchanged: if the real-time digital DC voltage ⁇ - 1) is increased at the previous moment, the pulse width modulation is used to change the duty cycle of the drive signal fc) The real-time digital DC voltage is increased; if the real-time digital DC voltage -1) is reduced at the previous moment, the real-time digital DC voltage is continuously reduced by using pulse width modulation to change the duty ratio of the driving signal.
  • the disturbance direction of the real-time digital DC voltage is changed as follows: If the real-time digital DC voltage ⁇ - 1) is increased at the previous moment, the pulse width modulation is used to change the duty cycle of the drive signal q (k) to reduce the real-time. Digital DC voltage If the real-time digital DC voltage M(fc - l) is reduced at the previous moment, the real-time digital DC power is increased by using pulse width modulation to change the duty cycle q(c) of the drive signal. J ⁇ u(k).
  • the real-time digital DC voltage u (the amount of change of k ⁇ £ / determines the duty cycle step of the drive signal duty cycle q ( ) for:

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Abstract

L'invention concerne un procédé de commande de poursuite du point de puissance solaire maximale et un système de lampe sans électrode. Le procédé comporte les étapes consistant à : obtenir une tension de point de référence de puissance maximale; obtenir une puissance numérique en temps réel d'une cellule solaire; et, en fonction de la valeur absolue de la puissance numérique en temps réel, déterminer le sens de perturbation d'une tension continue numérique en temps réel et, selon que |URF - u(k)| > 1/4 URF est établie ou non et en fonction de la variation de la tension continue numérique en temps réel, régler un incrément de facteur de marche. Un premier mode de réalisation du système de lampe sans électrode comporte un ballast de lampe solaire sans électrode, un onduleur relié au réseau et une lampe sans électrode, et un deuxième mode de réalisation du système de lampe sans électrode comporte un ballast de lampe solaire sans électrode, une batterie de stockage et une lampe sans électrode. Le procédé et le système de lampe sans électrode selon la présente invention sont caractérisés par un rendement de sortie plus élevé, un meilleur effet de poursuite et des coûts plus faibles, et peuvent être largement appliqués dans le domaine des applications solaires.
PCT/CN2012/078112 2012-07-03 2012-07-03 Procédé de commande de poursuite du point de puissance solaire maximale et système de lampe sans électrode WO2014005281A1 (fr)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN104267778A (zh) * 2014-09-17 2015-01-07 河海大学常州校区 一种基于功率微分的光伏发电最大功率点跟踪方法
CN111969945A (zh) * 2020-08-17 2020-11-20 博阳能源科技有限公司 一种准mppt新型光伏板追踪方法、设备及存储介质

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