CN112054853B - Method for realizing maximum power point tracking of optical fiber energy transmission - Google Patents
Method for realizing maximum power point tracking of optical fiber energy transmission Download PDFInfo
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- CN112054853B CN112054853B CN202010798933.5A CN202010798933A CN112054853B CN 112054853 B CN112054853 B CN 112054853B CN 202010798933 A CN202010798933 A CN 202010798933A CN 112054853 B CN112054853 B CN 112054853B
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- optical fiber
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/806—Arrangements for feeding power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/564—Power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
Abstract
The invention relates to the technical field of optical fiber energy transmission, in particular to an optical fiber energy transmission maximum power point tracking method which comprises a transmitting end 1, an energy transmission optical fiber link 2 and a receiving end 3, wherein the transmitting end 1 comprises an FPGA programmable control module 4, a laser emitting module 5 and an optical fiber detector 6, the energy transmission optical fiber link 2 is an optical fiber 7, the receiving end 3 comprises a photovoltaic cell 9, a photoelectric detection circuit module 10 and a load transient response circuit module 11, the FPGA programmable control module 4 detects whether laser emitted by the laser emitting module 5 meets set frequency and power, if not, adjustment is carried out, electricity emitted by the photovoltaic cell 9 is connected to the load transient response circuit module 11 after being detected by the photoelectric detection circuit module 10, and a constant voltage mode output mode and a constant current output mode are switched by adjusting an energy storage device which is connected with a load in parallel in the load transient response circuit module 11, the photovoltaic cell 9 is always at maximum power output.
Description
Technical Field
The invention relates to the technical field of optical fiber energy transmission, in particular to a maximum power point tracking implementation method in an optical fiber energy transmission use process.
Background
Optical fiber, as an optical waveguide medium, has been used as an energy transmission medium in many scenarios, in addition to its original large-capacity information transmission capability, which is the optical fiber energy transmission. The medium adopted by the optical fiber energy transmission is generally the energy transmission optical fiber which is specially processed, has large core diameter, low loss and high power tolerance, although the material shows higher energy transmission efficiency and external electromagnetic interference resistance in the energy transmission process compared with the traditional optical fiber, because the characteristic of the energy transmission optical fiber is changed along with the continuous increase of incident light power in the actual use process during long-time work, the conversion efficiency of the photovoltaic effect of a receiving end is also influenced.
Therefore, it is necessary to adopt an appropriate adjustment strategy for the change of the optical fiber characteristics caused by the actual optical power in the working process of the optical fiber energy transmission system, so as to obtain the maximum energy transmission efficiency while ensuring the normal use of the energy transmission optical fiber.
Disclosure of Invention
The invention aims to provide an optical fiber energy transmission maximum power point tracking method which comprises a transmitting end input power regulator and a receiving end output power regulator, wherein the two ends simultaneously detect actual parameters in an energy transmission process, so that the highest energy transmission efficiency is ensured.
In order to achieve the purpose, the technical scheme of the invention is as follows: an optical fiber energy transmission maximum power point tracking method comprises a sending end 1, an energy transmission optical fiber link 2 and a receiving end 3, wherein the sending end 1 comprises an FPGA programmable control module 4, a laser emission module 5 and an optical fiber detector 6, the energy transmission optical fiber link 2 is an optical fiber 7, the receiving end 3 comprises a photovoltaic cell 9, a photoelectric detection circuit module 10 and a load transient response circuit module 11, the FPGA programmable control module 4 controls the laser emission module 5 to emit laser with set frequency and power, the laser emitted by the laser emission module 5 is transmitted to the photovoltaic cell 9 through the optical fiber 7 to excite the photovoltaic cell 9 to generate power, the laser emitted by the laser emission module 5 is converted into a digital signal through the optical fiber detector 6 and transmitted to the FPGA programmable control module 4 after being detected by a detector interface 8 of the optical fiber detector 6 before entering the optical fiber 7, the FPGA programmable control module 4 detects whether the laser emitted by the laser emission module 5 meets the set frequency and power, if the power is not satisfied, the power is adjusted, the power generated by the photovoltaic cell 9 is detected by the photoelectric detection circuit module 10 and then is connected to the load transient response circuit module 11, and the constant voltage mode output mode and the constant current mode output mode are switched by adjusting an energy storage device in the load transient response circuit module 11, which is connected with the load in parallel, so that the photovoltaic cell 9 is always in maximum power output.
The FPGA programmable control module 4 integrates a moving average filtering algorithm, a PID control algorithm and a hill climbing algorithm, and the FPGA programmable control module 4 is connected with the laser emission module 5 and the optical fiber detector 6 through an RS485 communication interface.
The detector interface 8 comprises an input interface and two output interfaces, laser emitted by the laser emission module 5 enters the detector interface 8 through the input interface, one of the two output interfaces is used as a main interface to be connected with the input of the optical fiber 7, and the other output interface is used as an auxiliary interface to be connected with the test optical cable of the optical fiber detector 6.
The input end of the optical fiber detector 6 is connected with the secondary interface of the detector interface 8 through a test optical cable, and after receiving a control instruction of the FPGA programmable control module 4, the input end accurately measures the incident light power and the reflected light power of the energy transmission optical fiber link 2 during working, and feeds back the test result to the FPGA programmable control module 4.
The FPGA programmable control module 4 controls the laser emitting module 5 to output power laser with the wavelength of 810nm and keep stable by adopting a PID control algorithm and a hill climbing algorithm after being processed by a moving average filtering algorithm according to the received test result, and the maximum output light power of the laser emitting module 5 is more than 5W.
The optical fiber 7 is subjected to an anti-aging treatment process, cannot be lost after long-term ultraviolet radiation use, and can resist temperature of-190-350 ℃.
The photovoltaic cell 9 acts as a transduction device, generates a photoelectric effect output current when irradiated by a laser beam, and has a conversion efficiency of more than 70%.
The invention has the beneficial effects that: 1. a PID control algorithm and an optical fiber detector are introduced into a transmitting end, so that the stability of the output laser power is ensured, and the optical fiber is prevented from being damaged during long-time high-power laser irradiation. 2. Through the photoelectric detection circuit and the load transient response circuit module, the photovoltaic cell always works at the maximum power point, and the light energy conversion rate is the highest.
Drawings
FIG. 1 is a block diagram of the overall structure of the optical fiber energy transmission system of the present invention;
description of reference numerals: 1-a transmitting end; 2-energy transmission optical fiber link; 3-a receiving end; 4-FPGA programmable control module; 5-a laser emission module; 6-optical fiber detector; 7-an optical fiber; 8-a detector interface; 9-a photovoltaic cell; 10-a photoelectric detection circuit module; 11-load transient response circuit module.
Detailed Description
The present invention is further illustrated by the following specific examples, which should not be construed as limiting the invention, and functional, methodological, or structural equivalents and substitutions that can be made by those skilled in the art are intended to be included within the scope of the present invention.
Fig. 1 is a block diagram of a system structure based on a scheme of tracking a maximum power point of energy transmission by an optical fiber according to the present invention. The system comprises a transmitting end 1, an energy transmission optical fiber link 2 and a receiving end 3.
The transmitting end 1 comprises an FPGA programmable control module 4, a laser emitting module 5 and an optical fiber detector 6. The FPGA programmable control module 4 is used as a control core of the transmitting end 1, continuously collects the measurement data of the optical fiber detector 6, and corrects the output power of the laser emitting module 5 in real time by utilizing a PID control algorithm and a hill climbing algorithm, and the FPGA programmable control module comprises the following main working steps:
the method comprises the following steps: setting an initial output power value of the laser emitting module 5, the laser emitting module 5 starts to output a laser beam.
Step two: the optical fiber detector 6 feeds back the incident light power and the reflected light power of the current optical fiber 7 to the FPGA programmable control module 4 by measuring.
Step three: the FPGA programmable control module 4 performs moving average filtering and PID control, and adjusts the output power value by adopting a hill climbing algorithm.
Step four: and repeating the first step, the second step and the third step to enable the optical fiber 7 to be always in the state of highest transmission efficiency.
The main body of the energy transmission optical fiber link 2 is a large-core-diameter low-loss energy transmission optical fiber 7, one end of the energy transmission optical fiber is connected with a main interface of a special detector interface 8, and the other end of the energy transmission optical fiber is connected with a photovoltaic cell 9.
The receiving end 3 comprises a photovoltaic cell 9, a photoelectric detection circuit 10 and a load transient response circuit 11. Wherein the photovoltaic cell 9 is irradiated by a power laser beam to generate an electric current.
The subsequent main working steps are as follows:
the method comprises the following steps: the photoelectric detection circuit 10 stops working, and the load transient response circuit 11 converts the output current into a stable power voltage and outputs the stable power voltage to the electric equipment, wherein the state duration is 990 us.
Step two: the photoelectric detection circuit 10 starts working, the input of the load transient response circuit 11 is temporarily cut off, two characteristic parameter indexes of open-circuit voltage and short-circuit current of the photovoltaic cell are measured within 10us, the load transient response circuit 11 is controlled by adopting a hill climbing algorithm, and if the output power is lower than a set threshold value, the energy storage device is started and adjusted to be in a constant current output mode; and if the output power is greater than or equal to the set threshold, closing the energy storage device and adjusting to be in a constant voltage output mode.
Step three: the above two steps are repeated, and it should be noted that the detection time is strictly controlled, and the cycle period is controlled to be 1ms, so as to avoid affecting energy transmission.
The specific embodiments are given above, but the present invention is not limited to the described embodiments. The basic idea of the invention is that on the basis of the traditional optical fiber energy transmission system, the working state of the energy transmission optical fiber is monitored by using an optical fiber detector, so that the energy transmission efficiency is further improved; meanwhile, the open-circuit voltage and the short-circuit current of the photovoltaic cell are monitored at the receiving end, the output voltage and the current of the load transient response circuit 11 are adjusted, and the maximum power output is obtained by adopting a climbing method. Therefore, the invention is characterized in that the structure of the traditional optical fiber energy transmission system is not changed, and the corresponding state monitoring is simultaneously carried out on the input and the output to be used as the basis for adjusting the working state of the system. Therefore, the present invention is not limited to the description of the optical fiber energy transfer process in the above example. It is not necessary for those skilled in the art to devote creative work to design models, formulas and parameters of various modifications in light of the teachings of the present invention. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Claims (5)
1. A method for tracking the maximum power point of optical fiber energy transmission is characterized in that: the energy transmission optical fiber link (2) is an optical fiber (7), the receiving end (3) comprises a photovoltaic cell (9), a photoelectric detection circuit module (10) and a load transient response circuit module (11), the FPGA programmable control module (4) controls the laser emitting module (5) to emit laser with set frequency and power, the laser emitted by the laser emitting module (5) is transmitted to the photovoltaic cell (9) through the optical fiber (7) to excite the photovoltaic cell (9) to generate power, the laser emitted by the laser emitting module (5) is converted into a digital signal through the optical fiber detector (6) and transmitted to the FPGA programmable control module (4) before entering the optical fiber (7) and is detected by a detector interface (8) of the optical fiber detector (6), the FPGA programmable control module (4) detects whether laser emitted by the laser emitting module (5) meets set frequency and power, if not, the laser is adjusted, electricity emitted by the photovoltaic cell (9) is detected by the photoelectric detection circuit module (10) and then is connected to the load transient response circuit module (11), a constant voltage mode output mode and a constant current output mode are switched by adjusting an energy storage device connected with a load in parallel in the load transient response circuit module (11), so that the photovoltaic cell (9) is always in maximum power output, a sliding average filtering algorithm, a PID control algorithm and a hill climbing algorithm are integrated in the FPGA programmable control module (4), the FPGA programmable control module (4) is connected with the laser emitting module (5) and the optical fiber detector (6) through an RS485 communication interface, and the detector interface (8) comprises an input interface and two output interfaces, laser emitted by the laser emitting module (5) enters the detector interface (8) through the input interface, one of the two output interfaces is used as a main interface to be connected with the input of the optical fiber (7), and the other output interface is used as an auxiliary interface to be connected with the test optical cable of the optical fiber detector (6).
2. The method for tracking the maximum power point of the optical fiber energy transmission according to claim 1, wherein the method comprises the following steps: the input end of the optical fiber detector (6) is connected with the secondary interface of the detector interface (8) through a test optical cable, and after receiving a control instruction of the FPGA programmable control module (4), the input end accurately measures the incident light power and the reflected light power of the energy transmission optical fiber link (2) during working, and feeds back the test result to the FPGA programmable control module (4).
3. The method for tracking the maximum power point of the optical fiber energy transmission according to claim 1, wherein the method comprises the following steps: the FPGA programmable control module (4) controls the laser emitting module (5) to output power laser with the wavelength of 810nm and keep stable by adopting a PID control algorithm and a hill climbing algorithm after being processed by a moving average filtering algorithm according to the received test result, and the maximum output light power of the laser emitting module (5) is more than 5W.
4. The method for tracking the maximum power point of the optical fiber energy transmission according to claim 1, wherein the method comprises the following steps: the optical fiber (7) is subjected to an anti-aging treatment process, cannot be lost after long-term ultraviolet radiation use, and can resist temperature of-190-350 ℃.
5. The method for tracking the maximum power point of the optical fiber energy transmission according to claim 1, wherein the method comprises the following steps: the photovoltaic cell (9) acts as a transduction device, generates a photoelectric effect output current when irradiated by a laser beam, and has a conversion efficiency of more than 70%.
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| CN202010798933.5A CN112054853B (en) | 2020-08-11 | 2020-08-11 | Method for realizing maximum power point tracking of optical fiber energy transmission |
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| CN202010798933.5A CN112054853B (en) | 2020-08-11 | 2020-08-11 | Method for realizing maximum power point tracking of optical fiber energy transmission |
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| CN112054853B true CN112054853B (en) | 2022-01-14 |
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| CN113783318B (en) * | 2021-11-11 | 2022-02-15 | 北京邮电大学 | Energy management and storage system suitable for optical fiber energy transmission |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630171A (en) * | 2009-08-05 | 2010-01-20 | 华南理工大学 | Segmentation self-adapting hill climbing method and system applied for tracing maximum power of photovoltaic cell |
| CN101841272A (en) * | 2010-04-15 | 2010-09-22 | 艾默生网络能源有限公司 | Solar charging system, device and method for tracking maximum power point thereof |
| EP2512000A2 (en) * | 2011-04-15 | 2012-10-17 | ABB Research Ltd. | Reconfigurable power systems and converters |
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| CN107332301B (en) * | 2017-06-29 | 2019-12-24 | 南京航空航天大学 | Energy control method of laser wireless power transmission system based on efficiency optimization |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630171A (en) * | 2009-08-05 | 2010-01-20 | 华南理工大学 | Segmentation self-adapting hill climbing method and system applied for tracing maximum power of photovoltaic cell |
| CN101841272A (en) * | 2010-04-15 | 2010-09-22 | 艾默生网络能源有限公司 | Solar charging system, device and method for tracking maximum power point thereof |
| EP2512000A2 (en) * | 2011-04-15 | 2012-10-17 | ABB Research Ltd. | Reconfigurable power systems and converters |
Non-Patent Citations (2)
| Title |
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| Implementation of the novel temperature controller and incremental conductance MPPT algorithm for indoor photovoltaic system;Shahid, Hifsa等;《SOLAR ENERGY》;20180315;第235-242页 * |
| 基于激光供能的直流测量传感器的设计与优化;林睿 等;《光通信研究》;20170726;第2、3部分及附图2-8 * |
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