CN113867217A - DC24V power carrier quick shutoff control system - Google Patents
DC24V power carrier quick shutoff control system Download PDFInfo
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- CN113867217A CN113867217A CN202111176316.2A CN202111176316A CN113867217A CN 113867217 A CN113867217 A CN 113867217A CN 202111176316 A CN202111176316 A CN 202111176316A CN 113867217 A CN113867217 A CN 113867217A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000012546 transfer Methods 0.000 claims abstract description 6
- 230000000007 visual effect Effects 0.000 claims abstract description 5
- 230000000977 initiatory effect Effects 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 8
- 101100350389 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) OPY1 gene Proteins 0.000 claims description 3
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- 238000010586 diagram Methods 0.000 description 7
- 230000007175 bidirectional communication Effects 0.000 description 3
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- 239000012050 conventional carrier Substances 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
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Abstract
The invention provides a DC24V power carrier rapid turn-off control system, which comprises a rapid turn-off device, a button box, a data gateway and a cloud background, wherein the button box is connected with the data gateway; when the quick breaker is powered on, the connected photovoltaic modules and monitoring data acquisition thereof are conducted, and data are transmitted back to the connected button boxes in a DC24V carrier communication mode; when the power is off, the connected photovoltaic modules and monitoring data acquisition thereof are turned off; the button box transfers the data returned by the connected quick turn-off device and transmits the data to the cloud background through the data gateway; receiving a remote control instruction initiated by the cloud background or/and a local control instruction initiated by a local user, and realizing power supply or power failure control of the quick breaker; the data gateway transfers data and instructions; the cloud background receives and processes the transit data to provide visual service for the user; and initiating a remote control instruction according to the user command. The invention can not only overcome the problem of high failure rate brought by the traditional quick turn-off device, but also accelerate the turn-off response speed.
Description
Technical Field
The invention relates to the technical field of photovoltaic and new energy systems, in particular to a control system for a DC24V power carrier quick turn-off device.
Background
In the photovoltaic system, the group string voltage is very high, so that when in overhaul or fire disaster, the electric shock injury is easily caused to maintainers and firefighters. At the moment, the fast turn-off device can be controlled to realize the turn-off of the component level and cut off the connection among each block of components, thereby reducing the highest voltage of the string and protecting the personal safety. It follows that the reliability requirements of a fast shutdown are crucial.
At present, in order to save construction cost, a fast turn-off device in the market usually adopts a photovoltaic line PLC carrier mode to control turn-off, but the failure rate is higher. In addition, the rapid turn-off device in the market also has a delayed turn-off design, which seriously affects the turn-off response speed.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a DC24V power carrier fast turn-off control system, which can not only overcome the problem of high failure rate caused by the conventional fast turn-off device, but also accelerate the turn-off response speed.
In order to solve the technical problem, an embodiment of the present invention provides a DC24V power carrier fast turn-off control system, including a fast turn-off device, a button box, a data gateway, and a cloud background;
one end of the rapid breaker is connected with the photovoltaic module, the other end of the rapid breaker is connected with one end of the button box through a DC24V power line, and the rapid breaker is used for conducting the connected photovoltaic module and monitoring data acquisition thereof when being electrified, and realizing data return to the connected button box through a DC24V carrier communication mode; and when the power is off, the connected photovoltaic module and monitoring data acquisition thereof are turned off;
the other end of the button box is connected with the cloud background through the data gateway and used for transferring data returned by the connected quick breaker and transmitting the data to the cloud background through the data gateway when the button box is communicated with the connected quick breaker; receiving a remote control instruction initiated by the cloud background or/and a local control instruction initiated by a local user forwarded by the data gateway to realize power supply or power failure control of the connected fast shutoff;
the data gateway is used for transferring data and instructions;
the cloud background is used for receiving and processing the data gateway transfer data so as to provide visual service for users; and initiating a remote control instruction to the button box according to a user command.
The button boxes are at least one, and each button box is connected with at least one quick turn-off device.
If each button box is connected with a plurality of quick turn-off devices, two adjacent quick turn-off devices are connected through a DC24V power line, and communication is achieved through a DC24V carrier communication mode.
Wherein, a signal repeater is arranged between two of the plurality of quick turn-off devices connected with each button box; wherein the content of the first and second substances,
the signal repeater is used for increasing the DC24V voltage when the carrier distance is too far or the voltage drop of the output of the DC24V is too large so as to increase the number of the series connection of the quick interrupters connected with each button box.
Each quick breaker comprises a quick breaker body and a power supply module, wherein the power supply module is internally provided with a DC24V carrier signal loading circuit; wherein the content of the first and second substances,
the DC24V carrier signal loading circuit comprises a signal data loading processing chip and a quick turn-off response circuit connected with the signal data loading processing chip;
the signal data loading processing chip adopts a PB721 chip;
the quick turn-off response circuit comprises a switching transistor Q1, a switching transistor Q2, a triode T4, a triode T5, a resistor R31, a resistor R32 and a zener diode Z3; the sources of the switching transistor Q1 and the switching transistor Q2 are both connected with a DC24V power supply line, the gates of the switching transistor Q1 and the switching transistor Q2 are both connected with a pin 4 of a PB721 chip, the drain of the switching transistor Q1 is connected with the emitter of a triode T4, and the drain of the switching transistor Q2 is connected with a pin 3 of the PB721 chip; the collector of the triode T4 is connected with the pin 5 of the PB721 chip and the base of the triode T5, and the base of the triode T4 is connected with one end of the resistor R32; the emitter of the triode T5 is connected with the other end of the resistor R32, and is also connected with the connection line between the drain of the switching transistor Q2 and pin 3 of the PB721 chip through the resistor 31, and the collector of the triode T5 is grounded; one end of the zener diode Z3 is grounded, and the other end is connected to pin 3 of the PB721 chip.
The power module of each quick cut-off device is also provided with a circuit power supply rectifying and signal extracting and receiving circuit; wherein the content of the first and second substances,
the line power supply rectifying, signal extracting and receiving circuit is connected between a DC24V power line and a DC24V carrier signal loading circuit and comprises a rectifying bridge T1, a first voltage division circuit formed by a resistor R1 and a resistor R2, a second voltage division circuit formed by a triode Q1 and a resistor R3, a signal data receiving and processing chip U2, a photoelectric coupler OPY1 and a photoelectric coupler OPY 2.
And the user command of the cloud background comes from an APP end of the user mobile phone.
The embodiment of the invention has the following beneficial effects:
1. according to the invention, the component-level turn-off or turn-on control of the button box on the quick turn-off device is realized through the DC24V power line, and a carrier signal is also applied to the DC24V power line, so that the data bidirectional communication between the button box and the quick turn-off device is realized, and the problem of high failure rate caused by the traditional quick turn-off device can be solved;
2. according to the invention, the DC24V carrier signal loading circuit is arranged in the quick breaker, so that the operation stability of the quick breaker is improved, the cut-off of the DC24V is used as a cut-off signal, the reliability is very high, the cut-off speed is high, and the cut-off response speed is accelerated;
3. the invention realizes the non-polar wiring of the power supply of the turn-off device by adding the rectifier bridge into the fast turn-off device; 4. the invention realizes the enhancement of the carrier signal by adding the signal repeater between the quick turn-off devices.
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 introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a DC24V power carrier fast turn-off control system according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a DC24V power carrier fast turn-off control system according to an embodiment of the present invention;
FIG. 3 is a diagram of the application scenario of FIG. 2;
fig. 4 is a circuit connection diagram of a DC24V carrier signal loading circuit in a power module arranged inside a fast switch body in a DC24V power carrier fast switch control system according to an embodiment of the present invention;
fig. 5 is a circuit connection diagram of a circuit power rectifying, signal extracting, and receiving circuit in a power module disposed inside a fast switch body in a DC24V power carrier fast switch control system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment of the present invention, a DC24V power carrier fast turn-off control system includes a fast turn-off device 1, a button box 2, a data gateway 3, and a cloud background 4;
one end of the quick breaker 1 is connected with a photovoltaic module (not shown), the other end of the quick breaker is connected with one end of the button box 2 through a DC24V power line, and the quick breaker is used for conducting the connected photovoltaic module and monitoring data acquisition thereof when being electrified, and realizing data return to the connected button box 2 through a DC24V carrier communication mode; and when the power is off, the connected photovoltaic module and monitoring data acquisition thereof are turned off;
the other end of the button box 2 is connected with a cloud background 4 through a data gateway 3 and is used for transferring data returned by the connected fast breaker 1 and transmitting the data to the cloud background 4 through the data gateway 3 when communicating with the connected fast breaker 1; receiving a remote control instruction initiated by the data gateway 3 forwarding the cloud background 4 or/and a local control instruction (such as a button on the body box) initiated by a local user, so as to realize power supply or power failure control of the connected fast breaker 1;
the data gateway 3 is used for transferring data and instructions;
the cloud background 4 is used for receiving and processing the transfer data in the data gateway 3 so as to provide visual service for users; and initiating a remote control instruction to the button box 2 according to the user command. The user command can be from an APP end of the user mobile phone or initiated by the user remotely logging in the cloud background 4.
It should be noted that the data carrier communication is implemented on the DC24V power line, and some disadvantages (signal crosstalk and interference with AFCI operation) of the conventional carrier on the photovoltaic cable are eliminated.
It can be understood that the fast breaker 1 serves as a main component for turning on the photovoltaic module and monitoring data acquisition of the photovoltaic module when the power is on, for realizing data return by communicating with the button box 2 through the DC24V carrier wave, and for turning off the photovoltaic module and monitoring data acquisition thereof when the power is off.
The button box 2 communicates with the quick-acting switch 1 and also supplies power to the quick-acting switch 1. The button box 2 can also communicate with the data gateway 3, transfer the data of the rapid breaker 1 to the data gateway 3, and simultaneously can receive the remote control instruction transferred by the data gateway 3, thereby realizing the remote control of the rapid breaker 1. Meanwhile, the button box 2 is also provided with a local control button, and the DC24V output can be cut off through the button in the field.
The cloud background 4 can communicate with the mobile phone APP, and at the moment, the cloud background 4 and the mobile phone APP process data through the background and provide visual service for users, so that data such as the running state and the generated electricity quantity of the photovoltaic module can be checked; meanwhile, the user has the set authority, and can initiate a remote control instruction to the button box 2 so as to remotely control the component to be turned off.
As shown in fig. 2, when there is at least one button cartridge 2, at least one quick-acting shutter 1 is connected to each button cartridge 2. If each button box 2 is connected with a plurality of fast breakers 1, two adjacent fast breakers 1 are connected through a DC24V power line and communicate through a DC24V carrier communication mode, and a signal repeater 5 is arranged between two of the fast breakers connected to each button box 2. The signal repeater 5 is used for increasing the DC24V voltage when the carrier distance is too far or the voltage drop of the DC24V output is too large, so as to increase the number of the series connection of the quick breakers 1 connected with each button box 2.
Therefore, the signal repeater 5 can be serially connected to the DC24V power line when the carrier distance is too far or the voltage drop of the output of the DC24V is too large, so as to repeat the signal and raise the voltage of the DC24V, thereby increasing the number of the fast interrupters 1 carried by each button box 2. Therefore, compared with the traditional photovoltaic PLC communication mode which cannot realize signal enhancement under the condition of weak signals, the photovoltaic PLC communication method can enhance the reliability of data communication through the signal repeater 5 under the severe conditions of poor construction environment and long wiring distance.
Fig. 3 is a diagram of an application scenario of a DC24V power carrier fast turn-off control system according to an embodiment of the present invention. Data bidirectional communication is realized through a DC24V carrier communication mode, the operation states of all the quick breakers 1 can be monitored, in the topological structure diagram, the loading capacity of each button box 2 can exceed 255 points, each data gateway 3 can carry more than 255 button boxes 2, and the maximum number of the quick breakers 1 which can be carried by the whole system reaches 65025.
In the embodiment of the invention, the button box 2 is used for providing a control voltage source and carrier signal transmission line for the quick breaker 1, so that the operation stability of the quick breaker 1 is improved. And a DC24V carrier signal loading circuit is introduced into a power supply module of the quick turn-off device, and the cut-off of the DC24V is used as a turn-off signal, so that the reliability is very high, the turn-off speed is high, and the turn-off response speed can be accelerated.
Therefore, each fast shutter 1 includes a fast shutter body (not shown) and a power module (not shown) in which a DC24V carrier signal loading circuit is disposed; wherein the content of the first and second substances,
as shown in fig. 4, the DC24V carrier signal loading circuit includes a signal data loading processing chip and a fast turn-off response circuit connected thereto;
the signal data loading processing chip adopts a PB721 chip;
the quick turn-off response circuit comprises a switching transistor Q1, a switching transistor Q2, a triode T4, a triode T5, a resistor R31, a resistor R32 and a zener diode Z3; the sources S of the switching transistor Q1 and the switching transistor Q2 are both connected with a DC24V power supply line, the gates G of the switching transistor Q1 and the switching transistor Q2 are both connected with a pin 4 of a PB721 chip, the drain D of the switching transistor Q1 is connected with an emitter of a triode T4, and the drain D of the switching transistor Q2 is connected with a pin 3 of the PB721 chip; the collector of the triode T4 is connected with the pin 5 of the PB721 chip and the base of the triode T5, and the base of the triode T4 is connected with one end of the resistor R32; the emitter of the triode T5 is connected with the other end of the resistor R32, and is also connected with the connection line between the drain of the switching transistor Q2 and pin 3 of the PB721 chip through the resistor 31, and the collector of the triode T5 is grounded; one end of the zener diode Z3 is grounded, and the other end is connected to pin 3 of the PB721 chip.
In the embodiment of the invention, in order to prevent the quick breaker 1 from being damaged due to improper construction, the power supply part of the quick breaker 1 is subjected to redundancy processing, so that the quick breaker 1 rectifies the input of the DC24V, and the DC24V can be accessed into the quick breaker 1 without dividing the polarity, so that a constructor can conveniently access the DC24V power supply for the quick breaker 1 without paying attention to the polarity.
At this time, the power module of each fast cut-off device 1 is also provided with a circuit power supply rectifying and signal extracting and receiving circuit; wherein the content of the first and second substances,
as shown in fig. 5, the line power rectifying, signal extracting and receiving circuit is connected between the DC24V power line and the DC24V carrier signal loading circuit, and includes a rectifier bridge T1, a first voltage dividing circuit formed by a resistor R1 and a resistor R2, a second voltage dividing circuit formed by a transistor Q1 and a resistor R3, a signal data receiving and processing chip U2, a photo coupler OPY1, and a photo coupler OPY 2.
The embodiment of the invention has the following beneficial effects:
1. according to the invention, the component-level turn-off or turn-on control of the button box on the quick turn-off device is realized through the DC24V power line, and a carrier signal is also applied to the DC24V power line, so that the data bidirectional communication between the button box and the quick turn-off device is realized, and the problem of high failure rate caused by the traditional quick turn-off device can be solved;
2. according to the invention, the DC24V carrier signal loading circuit is arranged in the quick breaker, so that the operation stability of the quick breaker is improved, the cut-off of the DC24V is used as a cut-off signal, the reliability is very high, the cut-off speed is high, and the cut-off response speed is accelerated;
3. the invention realizes the non-polar wiring of the power supply of the turn-off device by adding the rectifier bridge into the fast turn-off device;
4. the invention realizes the enhancement of the carrier signal by adding the signal repeater between the quick turn-off devices.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (7)
1. A DC24V power carrier rapid turn-off control system is characterized by comprising a rapid turn-off device, a button box, a data gateway and a cloud background;
one end of the rapid breaker is connected with the photovoltaic module, the other end of the rapid breaker is connected with one end of the button box through a DC24V power line, and the rapid breaker is used for conducting the connected photovoltaic module and monitoring data acquisition thereof when being electrified, and realizing data return to the connected button box through a DC24V carrier communication mode; and when the power is off, the connected photovoltaic module and monitoring data acquisition thereof are turned off;
the other end of the button box is connected with the cloud background through the data gateway and used for transferring data returned by the connected quick breaker and transmitting the data to the cloud background through the data gateway when the button box is communicated with the connected quick breaker; receiving a remote control instruction initiated by the cloud background or/and a local control instruction initiated by a local user forwarded by the data gateway to realize power supply or power failure control of the connected fast shutoff;
the data gateway is used for transferring data and instructions;
the cloud background is used for receiving and processing the data gateway transfer data so as to provide visual service for users; and initiating a remote control instruction to the button box according to a user command.
2. The DC24V power carrier fast shutdown control system of claim 1, wherein there is at least one of the button boxes, and at least one fast shutdown is connected to each button box.
3. The DC24V power carrier fast turn-off control system of claim 2, wherein if a plurality of fast turn-off devices are connected to each button box, two adjacent fast turn-off devices are connected via a DC24V power line and communicate via a DC24V carrier communication.
4. The DC24V power carrier fast shutter control system of claim 3, wherein a signal repeater is disposed between two of the plurality of fast shutters to which each button box is connected; wherein the content of the first and second substances,
the signal repeater is used for increasing the DC24V voltage when the carrier distance is too far or the voltage drop of the output of the DC24V is too large so as to increase the number of the series connection of the quick interrupters connected with each button box.
5. The DC24V power carrier fast turn-off control system of claim 4, wherein each fast turn-off includes a fast turn-off body and a power module having a DC24V carrier signal loading circuit disposed therein; wherein the content of the first and second substances,
the DC24V carrier signal loading circuit comprises a signal data loading processing chip and a quick turn-off response circuit connected with the signal data loading processing chip;
the signal data loading processing chip adopts a PB721 chip;
the quick turn-off response circuit comprises a switching transistor Q1, a switching transistor Q2, a triode T4, a triode T5, a resistor R31, a resistor R32 and a zener diode Z3; the sources of the switching transistor Q1 and the switching transistor Q2 are both connected with a DC24V power supply line, the gates of the switching transistor Q1 and the switching transistor Q2 are both connected with a pin 4 of a PB721 chip, the drain of the switching transistor Q1 is connected with the emitter of a triode T4, and the drain of the switching transistor Q2 is connected with a pin 3 of the PB721 chip; the collector of the triode T4 is connected with the pin 5 of the PB721 chip and the base of the triode T5, and the base of the triode T4 is connected with one end of the resistor R32; the emitter of the triode T5 is connected with the other end of the resistor R32, and is also connected with the connection line between the drain of the switching transistor Q2 and pin 3 of the PB721 chip through the resistor 31, and the collector of the triode T5 is grounded; one end of the zener diode Z3 is grounded, and the other end is connected to pin 3 of the PB721 chip.
6. The DC24V power carrier fast turn-off control system of claim 5, wherein the power module of each fast turn-off further comprises a line power rectification and signal extraction, receiving circuit; wherein the content of the first and second substances,
the line power supply rectifying, signal extracting and receiving circuit is connected between a DC24V power line and a DC24V carrier signal loading circuit and comprises a rectifying bridge T1, a first voltage division circuit formed by a resistor R1 and a resistor R2, a second voltage division circuit formed by a triode Q1 and a resistor R3, a signal data receiving and processing chip U2, a photoelectric coupler OPY1 and a photoelectric coupler OPY 2.
7. The DC24V power carrier fast turn-off control system of claim 1, wherein the user command of the cloud background comes from a user handset APP side.
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| CN202111176316.2A CN113867217A (en) | 2021-10-09 | 2021-10-09 | DC24V power carrier quick shutoff control system |
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| CN202111176316.2A CN113867217A (en) | 2021-10-09 | 2021-10-09 | DC24V power carrier quick shutoff control system |
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2021
- 2021-10-09 CN CN202111176316.2A patent/CN113867217A/en active Pending
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| CN105429834A (en) * | 2015-11-09 | 2016-03-23 | 浙江大学 | Smoke control and exhaust monitoring system based on 24V DC power line carrier communication |
| US20170271875A1 (en) * | 2016-03-21 | 2017-09-21 | Solarcity Corporation | Rapid shutdown and safety disconnect for hybrid pv systems |
| CN108390643A (en) * | 2018-02-09 | 2018-08-10 | 杭州网策通信技术有限公司 | The remote monitoring system and method for solar photovoltaic assembly |
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