CN112769095A - Protection circuit, control method, device and system for photoelectric conversion module - Google Patents
Protection circuit, control method, device and system for photoelectric conversion module Download PDFInfo
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- CN112769095A CN112769095A CN201911059285.5A CN201911059285A CN112769095A CN 112769095 A CN112769095 A CN 112769095A CN 201911059285 A CN201911059285 A CN 201911059285A CN 112769095 A CN112769095 A CN 112769095A
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- photoelectric conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
Abstract
The invention provides a protection circuit, a control method, a device and a system of a photoelectric conversion module, wherein the protection circuit comprises: the device comprises a power control module, a photoelectric conversion module, a light intensity and voltage sampling module and a feedback communication module. The light intensity and voltage sampling module is connected with the photocell and the feedback communication module, collects the voltage value of the photocell and sends the voltage value to the power control module through the feedback communication module so that the power control module outputs a control instruction based on the voltage value. Then, the power control module is connected with the photoelectric conversion module and sends a control instruction to the photoelectric conversion module, and the photoelectric conversion module outputs light energy based on the control instruction to supply power to the photocell. Therefore, the protection circuit for the photoelectric conversion module provided by the embodiment can control the output light energy of the photoelectric conversion module based on the voltage value of the photocell, specifically, the protection circuit can turn off the photoelectric conversion module, or increase or decrease the light energy output by the photoelectric conversion module, so as to prevent the photoelectric conversion module from being damaged.
Description
Technical Field
The invention relates to the technical field of equipment protection, in particular to a protection circuit, a control method, a device and a system of a photoelectric conversion module.
Background
Usually, a remote module is configured in the substation, and specifically, the remote module is a secondary device disposed on the high-voltage side and used for acquiring a voltage or current signal on the high-voltage side. The high-voltage side equipment needs to be electrically isolated from the low-voltage side equipment, so that at present, the photoelectric conversion module of the low-voltage side product is used for converting electric energy into optical energy, and then the optical energy is transmitted to the far-end module through the optical fiber to supply power to the far-end module.
However, when the optical path transmission medium has contamination or clogging, laser energy transmitted from the photoelectric conversion module may be collected at the optical path obstacle, so that the temperature at the obstacle rises, thereby damaging the transmission medium. In addition, when the laser light encounters an obstacle, the laser light is reflected and transmitted back to the photoelectric conversion module, which causes damage to the photoelectric conversion module.
Therefore, it is an urgent technical problem to be solved by those skilled in the art how to provide a protection circuit for a photoelectric conversion module, which can prevent the photoelectric conversion module from being damaged.
Disclosure of Invention
In view of this, embodiments of the present invention provide a protection circuit for a photoelectric conversion module, which can prevent the photoelectric conversion module from being damaged.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a photoelectric conversion module protection circuit comprising: the device comprises a power control module, a photoelectric conversion module, a light intensity and voltage sampling module and a feedback communication module;
the power control module is connected with the photoelectric conversion module and sends a control instruction to the photoelectric conversion module, and the photoelectric conversion module outputs light energy based on the control instruction and supplies power to the photocell;
the light intensity and voltage sampling module is connected with the photocell and the feedback communication module, collects the voltage value of the photocell and sends the voltage value to the power control module through the feedback communication module, so that the power control module outputs the control instruction based on the voltage value.
Optionally, the power control module includes: the device comprises a control chip, a first digital-to-analog conversion chip and a second digital-to-analog conversion chip;
the control chip sends a voltage output instruction, the first digital-to-analog conversion chip outputs a corresponding voltage value to the photoelectric conversion module based on the control instruction, and the photoelectric conversion module is in a standby state;
the control chip sends an enable signal to the photoelectric conversion module so that the photoelectric conversion module outputs laser current corresponding to the voltage value based on the enable signal;
the second digital-to-analog conversion chip collects the laser current output by the photoelectric conversion module and sends the laser current to the control chip.
Optionally, the light intensity voltage sampling module includes: the circuit comprises a divider resistor, a voltage follower and a modulus chip;
the voltage follower and the divider resistor are connected with the photocell and used for collecting a voltage value on the photocell and sending the voltage value to the control chip through the analog-digital chip.
Optionally, the light intensity voltage sampling module further includes: a switch is arranged on the base plate, and the switch,
the switch is arranged between the control chip and the photoelectric conversion module and used for disconnecting or connecting the control chip and the photoelectric conversion module.
A control method of a protection circuit of a photoelectric conversion module, applied to the protection circuit of the photoelectric conversion module, comprising:
acquiring a voltage value on the photovoltaic cell;
when the voltage value is greater than or equal to a preset voltage lower limit and smaller than a preset reference standard voltage, sending a first control instruction to the photoelectric conversion module so that the voltage value of the photocell is increased to the preset reference standard voltage;
when the voltage value is greater than the preset reference standard voltage and less than or equal to the preset voltage upper limit, sending a second control instruction to the photoelectric conversion module so as to reduce the voltage value on the photocell to the preset reference standard voltage;
and when the voltage value is smaller than the lower preset voltage limit or the voltage value is larger than the upper preset voltage limit, sending a third control instruction to the photoelectric conversion module so as to turn off the photoelectric conversion module.
Optionally, the method further includes:
and when a third control instruction is sent to the photoelectric conversion module, sound and light alarm is carried out.
A control device of a protection circuit of a photoelectric conversion module, comprising:
the acquisition module is used for acquiring a voltage value on the photocell;
the first control module is used for sending a first control instruction to the photoelectric conversion module when the voltage value is greater than or equal to a preset voltage lower limit and smaller than a preset reference standard voltage so as to increase the voltage value on the photocell to the preset reference standard voltage;
the second control module is used for sending a second control instruction to the photoelectric conversion module when the voltage value is greater than the preset reference standard voltage and less than or equal to the preset voltage upper limit so as to reduce the voltage value on the photocell to the preset reference standard voltage;
and the third control module is used for sending a third control instruction to the photoelectric conversion module when the voltage value is smaller than the preset lower voltage limit or the voltage value is larger than the preset upper voltage limit so as to turn off the photoelectric conversion module.
Optionally, the method further includes:
and the alarm module is used for giving an audible and visual alarm when a third control instruction is sent to the photoelectric conversion module.
A control system of a protection circuit of a photoelectric conversion module includes a control device of any one of the above protection circuits of the photoelectric conversion module.
Based on the above technical solution, an embodiment of the present invention provides a protection circuit for a photoelectric conversion module, including: the device comprises a power control module, a photoelectric conversion module, a light intensity and voltage sampling module and a feedback communication module. The light intensity and voltage sampling module is connected with the photocell and the feedback communication module, collects the voltage value of the photocell and sends the voltage value to the power control module through the feedback communication module so that the power control module outputs a control instruction based on the voltage value. Then, the power control module is connected with the photoelectric conversion module and sends a control instruction to the photoelectric conversion module, and the photoelectric conversion module outputs light energy based on the control instruction to supply power to the photocell. Therefore, the protection circuit for the photoelectric conversion module provided by the embodiment can control the output light energy of the photoelectric conversion module based on the voltage value of the photocell, specifically, the protection circuit can turn off the photoelectric conversion module, or increase or decrease the light energy output by the photoelectric conversion module, so as to prevent the photoelectric conversion module from being damaged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a protection circuit of a photoelectric conversion module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power control module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a light intensity and voltage sampling module according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a control method of a protection circuit of a photoelectric conversion module according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating an example of a control method for a protection circuit of a photoelectric conversion module according to an embodiment of the present invention;
fig. 6 is a schematic flowchart of a method for controlling a protection circuit of a photoelectric conversion module according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a control device of a protection circuit of a photoelectric conversion module according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1, fig. 1 is a schematic structural diagram of a protection circuit of a photoelectric conversion module according to an embodiment of the present invention, where the protection circuit 1 includes: the device comprises a power control module 11, a photoelectric conversion module 12, a light intensity and voltage sampling module 13 and a feedback communication module 14.
The light intensity and voltage sampling module 13 is connected with the photocell and the feedback communication module 14, collects a voltage value of the photocell, and sends the voltage value to the power control module 11 through the feedback communication module 14, so that the power control module 11 outputs a control instruction based on the voltage value.
The power control module 11 is connected to the photoelectric conversion module 12, and sends a control command to the photoelectric conversion module 12, and the photoelectric conversion module 12 outputs light energy based on the control command to supply power to the photocell.
It can be seen that, in this embodiment, the power control module 11 sends a control instruction to the photoelectric conversion module 12, the photoelectric conversion module 12 controls the output power of the laser based on the control instruction, and the photocell in the remote module starts to work after receiving the laser, and converts the light energy into the electric energy to supply power to the remote module.
Meanwhile, the light intensity and voltage sampling module 13 collects the voltage value of the photocell, feeds the voltage value back to the feedback communication module 14, sends the voltage value to the power control module 11 through the feedback communication module 14, and then the power control module 11 outputs a control instruction based on the voltage value, so that the self-adjustment of the whole power supply system is realized.
The control command may be a command for controlling the photoelectric conversion module 12 to turn off, or may be a command for increasing or decreasing the light energy output by the photoelectric conversion module. Therefore, when the voltage value on the photocell is detected to be abnormally changed, the photoelectric conversion module can be controlled to be turned off, and the photoelectric conversion module is prevented from being damaged.
Specifically, on the basis of the foregoing embodiment, as shown in fig. 2, this embodiment further provides a specific implementation structure of a power control module 11, including: a control chip 21, a first digital-to-analog conversion chip 22 and a second digital-to-analog conversion chip 23.
The working principle is as follows: the control chip 21 sends a control instruction of voltage output, the first digital-to-analog conversion chip 22 outputs a corresponding voltage value to the photoelectric conversion module 12 based on the control instruction, and the photoelectric conversion module 12 is in a standby state, and at this time, no laser is output.
The control chip 21 sends an enable signal to the photoelectric conversion module 12, so that the photoelectric conversion module 12 outputs a laser current corresponding to the voltage value based on the enable signal. The second digital-to-analog conversion chip 23 collects the laser current output by the photoelectric conversion module 12, and sends the laser current to the control chip 21, that is, the working state of the photoelectric conversion module 12 is determined by collecting the laser current.
It should be noted that, in this embodiment, the control chip 21 may be an FPGA, and the first digital-to-analog conversion chip 22 and the second digital-to-analog conversion module 23 may be AD chips.
In addition, in the protection circuit for a photoelectric conversion module provided in this embodiment, the light intensity and voltage sampling module further includes a switch, and the switch is disposed between the control chip and the photoelectric conversion module and is configured to disconnect or connect the control chip and the photoelectric conversion module.
On the basis of the foregoing embodiments, as shown in fig. 3, this embodiment further provides a specific implementation structure of the light intensity and voltage sampling module, including: a divider resistor R1, a voltage follower (composed of an operational amplifier U1 and a resistor R2), and a modulus chip I1.
The voltage follower and the divider resistor are connected with the photocell and used for collecting voltage values on the photocell and sending the voltage values to the control chip through the analog-digital chip, and light intensity and voltage collection and feedback communication functions are sequentially completed.
In addition, as shown in fig. 4, the present embodiment further provides a method for controlling a protection circuit of a photoelectric conversion module, which is applied to any one of the protection circuits of the photoelectric conversion module, and includes the steps of:
s41, acquiring a voltage value on the photocell;
s42, when the voltage value is greater than or equal to a preset lower voltage limit and smaller than a preset reference standard voltage, sending a first control instruction to the photoelectric conversion module so that the voltage value of the photocell is increased to the preset reference standard voltage;
s43, when the voltage value is larger than the preset reference standard voltage and smaller than or equal to the preset voltage upper limit, sending a second control instruction to the photoelectric conversion module so as to reduce the voltage value of the photocell to the preset reference standard voltage;
and S44, when the voltage value is smaller than the preset lower voltage limit or the voltage value is larger than the preset upper voltage limit, sending a third control instruction to the photoelectric conversion module to turn off the photoelectric conversion module.
Illustratively, as shown in fig. 5, the power control module 11 presets three voltage values, which are respectively recorded as a preset lower voltage limit V1, a preset reference standard voltage V2, and a preset upper voltage limit V3, where V1 < V2 < V3. The voltage value of the photocell collected by the light intensity and voltage sampling module 13 is set to be V4.
Then, when the power control module 11 receives the voltage value V4, it compares it with V1, V2 and V3 as follows:
(1) when V1 is not less than V4 and V2 is less than V, the power control module 11 sends a first control command to the photoelectric conversion module 12 to increase the output voltage until V4 is equal to V2;
(2) when V2 is greater than V4 and less than or equal to V3, the power control module 11 sends a second control command to the photoelectric conversion module 12 to decrease the output voltage until V4 is equal to V2;
(3) when V4 < V1 or V4 > V3, the power control module 11 sends a third control command to the photoelectric conversion module 12 to lower the output voltage to 0V and turn off the laser ENABLE signal (ENABLE), thereby turning off the laser output.
Besides, in this embodiment, as shown in fig. 6, the method further includes the steps of: and S61, when a third control command is sent to the photoelectric conversion module, sound and light alarm is carried out.
That is, when the laser output is turned off, the power control module 11 may also report a laser abnormal signal to a higher-level device or an upper computer, or display an abnormal state by using a light emitting diode corresponding to the device.
Therefore, the protection circuit for the photoelectric conversion module provided by the embodiment can control the output light energy of the photoelectric conversion module based on the voltage value of the photocell, specifically, the protection circuit can turn off the photoelectric conversion module, or increase or decrease the light energy output by the photoelectric conversion module, so as to prevent the photoelectric conversion module from being damaged.
On the basis of the above embodiment, as shown in fig. 7, this embodiment further provides a schematic structural diagram of a control device of a protection circuit of a photoelectric conversion module, including:
an obtaining module 71, configured to obtain a voltage value across the photovoltaic cell;
the first control module 72 is configured to send a first control instruction to the photoelectric conversion module when the voltage value is greater than or equal to a preset lower voltage limit and smaller than a preset reference standard voltage, so that the voltage value on the photovoltaic cell is increased to the preset reference standard voltage;
the second control module 73 is configured to send a second control instruction to the photoelectric conversion module when the voltage value is greater than the preset reference standard voltage and less than or equal to a preset voltage upper limit, so that the voltage value of the photovoltaic cell is reduced to the preset reference standard voltage;
and a third control module 74, configured to send a third control instruction to the photoelectric conversion module to turn off the photoelectric conversion module when the voltage value is smaller than the preset lower voltage limit or the voltage value is greater than the preset upper voltage limit.
In addition, the control device for the protection circuit of the photoelectric conversion module provided in this embodiment may further include:
and the alarm module is used for giving an audible and visual alarm when a third control instruction is sent to the photoelectric conversion module.
The working principle of the control device is described in the above embodiments of the method, and will not be described repeatedly.
In addition, the present embodiment also provides a control system of a protection circuit of a photoelectric conversion module, including any one of the control devices of the protection circuit of the photoelectric conversion module. The working principle of the control system is described in the above method embodiment, and will not be described repeatedly.
In summary, the present invention provides a protection circuit, a control method, an apparatus and a system for a photoelectric conversion module, wherein the protection circuit comprises: the device comprises a power control module, a photoelectric conversion module, a light intensity and voltage sampling module and a feedback communication module. The light intensity and voltage sampling module is connected with the photocell and the feedback communication module, collects the voltage value of the photocell and sends the voltage value to the power control module through the feedback communication module so that the power control module outputs a control instruction based on the voltage value. Then, the power control module is connected with the photoelectric conversion module and sends a control instruction to the photoelectric conversion module, and the photoelectric conversion module outputs light energy based on the control instruction to supply power to the photocell. Therefore, the protection circuit for the photoelectric conversion module provided by the embodiment can control the output light energy of the photoelectric conversion module based on the voltage value of the photocell, specifically, the protection circuit can turn off the photoelectric conversion module, or increase or decrease the light energy output by the photoelectric conversion module, so as to prevent the photoelectric conversion module from being damaged.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A protection circuit for a photoelectric conversion module, comprising: the device comprises a power control module, a photoelectric conversion module, a light intensity and voltage sampling module and a feedback communication module;
the power control module is connected with the photoelectric conversion module and sends a control instruction to the photoelectric conversion module, and the photoelectric conversion module outputs light energy based on the control instruction and supplies power to the photocell;
the light intensity and voltage sampling module is connected with the photocell and the feedback communication module, collects the voltage value of the photocell and sends the voltage value to the power control module through the feedback communication module, so that the power control module outputs the control instruction based on the voltage value.
2. The protection circuit for a photoelectric conversion module according to claim 1, wherein the power control module comprises: the device comprises a control chip, a first digital-to-analog conversion chip and a second digital-to-analog conversion chip;
the control chip sends a voltage output instruction, the first digital-to-analog conversion chip outputs a corresponding voltage value to the photoelectric conversion module based on the control instruction, and the photoelectric conversion module is in a standby state;
the control chip sends an enable signal to the photoelectric conversion module so that the photoelectric conversion module outputs laser current corresponding to the voltage value based on the enable signal;
the second digital-to-analog conversion chip collects the laser current output by the photoelectric conversion module and sends the laser current to the control chip.
3. The protection circuit of claim 2, wherein the light intensity voltage sampling module comprises: the circuit comprises a divider resistor, a voltage follower and a modulus chip;
the voltage follower and the divider resistor are connected with the photocell and used for collecting a voltage value on the photocell and sending the voltage value to the control chip through the analog-digital chip.
4. The protection circuit of claim 3, wherein the light intensity voltage sampling module further comprises: a switch is arranged on the base plate, and the switch,
the switch is arranged between the control chip and the photoelectric conversion module and used for disconnecting or connecting the control chip and the photoelectric conversion module.
5. A control method of a protection circuit of a photoelectric conversion module, applied to the protection circuit of the photoelectric conversion module according to any one of claims 1 to 4, comprising:
acquiring a voltage value on the photovoltaic cell;
when the voltage value is greater than or equal to a preset voltage lower limit and smaller than a preset reference standard voltage, sending a first control instruction to the photoelectric conversion module so that the voltage value of the photocell is increased to the preset reference standard voltage;
when the voltage value is greater than the preset reference standard voltage and less than or equal to the preset voltage upper limit, sending a second control instruction to the photoelectric conversion module so as to reduce the voltage value on the photocell to the preset reference standard voltage;
and when the voltage value is smaller than the lower preset voltage limit or the voltage value is larger than the upper preset voltage limit, sending a third control instruction to the photoelectric conversion module so as to turn off the photoelectric conversion module.
6. The method for controlling the protection circuit of the photoelectric conversion module according to claim 5, further comprising:
and when a third control instruction is sent to the photoelectric conversion module, sound and light alarm is carried out.
7. A control device for a protection circuit of a photoelectric conversion module, comprising:
the acquisition module is used for acquiring a voltage value on the photocell;
the first control module is used for sending a first control instruction to the photoelectric conversion module when the voltage value is greater than or equal to a preset voltage lower limit and smaller than a preset reference standard voltage so as to increase the voltage value on the photocell to the preset reference standard voltage;
the second control module is used for sending a second control instruction to the photoelectric conversion module when the voltage value is greater than the preset reference standard voltage and less than or equal to the preset voltage upper limit so as to reduce the voltage value on the photocell to the preset reference standard voltage;
and the third control module is used for sending a third control instruction to the photoelectric conversion module when the voltage value is smaller than the preset lower voltage limit or the voltage value is larger than the preset upper voltage limit so as to turn off the photoelectric conversion module.
8. The control device of the protection circuit of the photoelectric conversion module according to claim 7, further comprising:
and the alarm module is used for giving an audible and visual alarm when a third control instruction is sent to the photoelectric conversion module.
9. A control system of a protection circuit of a photoelectric conversion module, comprising the control device of the protection circuit of the photoelectric conversion module according to any one of claims 7 to 8.
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| CN201911059285.5A CN112769095A (en) | 2019-11-01 | 2019-11-01 | Protection circuit, control method, device and system for photoelectric conversion module |
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| CN201878048U (en) * | 2010-11-04 | 2011-06-22 | 中电普瑞科技有限公司 | Device for transmitting energy by multimode communication optical fiber |
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