CN114709113B - Intelligent low-voltage circuit breaker - Google Patents
Intelligent low-voltage circuit breaker Download PDFInfo
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- CN114709113B CN114709113B CN202210311779.3A CN202210311779A CN114709113B CN 114709113 B CN114709113 B CN 114709113B CN 202210311779 A CN202210311779 A CN 202210311779A CN 114709113 B CN114709113 B CN 114709113B
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- 238000004891 communication Methods 0.000 claims abstract description 52
- 239000003990 capacitor Substances 0.000 claims description 41
- 238000001514 detection method Methods 0.000 claims description 36
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000012937 correction Methods 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 238000011897 real-time detection Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- Computer Security & Cryptography (AREA)
- Power Engineering (AREA)
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- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses an intelligent low-voltage circuit breaker, which comprises: the system comprises an encryption unit, a power carrier unit and a main controller, wherein the encryption unit is used for encrypting data information; the power carrier unit is used for transmitting data information through a power line; the main controller is respectively connected with the encryption unit and the power carrier unit and is used for encrypting the data information of the circuit breaker through the encryption unit and sending the encrypted data information to the external equipment through the power carrier unit. Therefore, the data information power carrier is transmitted to the external equipment through the power carrier unit and the encryption unit in an encrypted manner, the defect that data cannot be transmitted remotely is effectively overcome, the data information acquisition communication range is expanded, meanwhile, communication data can be prevented from being illegally acquired, and the safety of data transmission is improved.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to an intelligent low-voltage circuit breaker.
Background
Along with the rapid development of the power system, the power system has higher requirements on communication and intellectualization of power distribution equipment, and a circuit breaker is used as key node equipment of the power system, can be used for switching load current in the power system, realizes reliable and rapid cutting of short-circuit current, and is an optimal detection point of the power distribution system.
However, the traditional circuit breaker is affected by a plurality of environmental factors such as field bus arrangement, communication distance and the like, and can only be installed in the same power distribution cabinet or equipment around the power distribution cabinet, so that the communication range of data information acquisition is severely limited, and the communication content transmitted by the traditional circuit breaker is easily obtained by a third party illegally, so that potential data safety hazards exist.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the invention aims to provide the intelligent low-voltage circuit breaker, which is used for encrypting and transmitting the data information power carrier to the external equipment through the power carrier unit and the encryption unit, so that the defect that data cannot be transmitted remotely is effectively overcome, the data information acquisition communication range is expanded, meanwhile, communication data can be prevented from being illegally acquired, and the safety of data transmission is improved.
In order to achieve the above object, an embodiment of the present invention provides an intelligent low-voltage circuit breaker, the circuit breaker including: an encryption unit configured to encrypt data information; the power carrier unit is used for transmitting data information through a power line; and the main controller is respectively connected with the encryption unit and the power carrier unit and is used for encrypting the data information of the circuit breaker through the encryption unit and sending the encrypted data information to the external equipment through the power carrier unit.
According to the intelligent low-voltage circuit breaker disclosed by the embodiment of the invention, the main controller controls the encryption unit to encrypt the data information of the circuit breaker, and controls the power carrier unit to send the encrypted data information to the external equipment. Therefore, the data information power carrier is transmitted to the external equipment through the power carrier unit and the encryption unit in an encrypted manner, the defect that data cannot be transmitted remotely is effectively overcome, the data information acquisition communication range is expanded, meanwhile, communication data can be prevented from being illegally acquired, and the safety of data transmission is improved.
According to one embodiment of the present invention, an encryption unit includes: the data input and output end of the encryption chip is connected with the main controller; the control end of the switching tube is connected with the main controller, the first end of the switching tube is connected with a preset power supply, the second end of the switching tube is connected with the power supply end of the encryption chip, and the main controller is further used for controlling the switching tube to be turned on or off so as to control the encryption chip to work or stop working.
According to one embodiment of the invention, the encryption unit further comprises: and the filter capacitor is connected between the second end of the switch tube and the ground.
According to one embodiment of the invention, the circuit breaker further comprises: the switch is connected in a main loop of the circuit breaker through an internal wiring terminal of the circuit breaker; the built-in temperature detection piece is arranged corresponding to the internal wiring terminal and is used for detecting the temperature of the internal wiring terminal and outputting a corresponding first voltage signal; the built-in temperature collector is connected with the built-in temperature detection piece and used for collecting a first voltage signal; the main controller is also connected with the built-in temperature collector and is used for acquiring the temperature of the internal wiring terminal according to the first voltage signal and performing over-temperature protection.
According to one embodiment of the invention, the internal wiring terminals comprise a plurality of internal incoming wiring terminals and a plurality of internal outgoing wiring terminals, the built-in temperature detection piece comprises a plurality of first thermocouples, and each internal incoming wiring terminal and/or each internal outgoing wiring terminal is provided with one first thermocouple respectively.
According to one embodiment of the invention, the circuit breaker further comprises: the first optical coupler isolator is arranged between the built-in temperature collector and the main controller and is used for carrying out optical coupler isolation on the first voltage signal.
According to one embodiment of the invention, the circuit breaker further comprises: the internal communication module is communicated with the external temperature collector and is used for receiving a second voltage signal acquired by the external temperature collector, wherein the external temperature collector is connected with the external temperature detection piece, and the external temperature detection piece is arranged corresponding to an external wiring terminal of the circuit breaker and is used for detecting the temperature of the external wiring terminal and outputting a corresponding second voltage signal; the main controller is also connected with the internal communication module and is used for acquiring the temperature of the external wiring terminal according to the second voltage signal and performing over-temperature protection.
According to one embodiment of the invention, the external connection terminal comprises a plurality of external incoming connection terminals and a plurality of external outgoing connection terminals, the external temperature detection piece comprises a plurality of second thermocouples, and each external incoming connection terminal and/or each external outgoing connection terminal is provided with a second thermocouple respectively.
According to one embodiment of the invention, the circuit breaker further comprises: and the second optical coupler isolator is arranged between the internal communication module and the main controller and is used for carrying out optical coupler isolation on the second voltage signal.
According to one embodiment of the invention, the circuit breaker further comprises: the voltage detection part is arranged on the main loop and used for acquiring the voltage of the main loop; the current detection piece is arranged on the main loop and used for acquiring the current of the main loop; and the processor is respectively connected with the voltage detection part, the current detection part and the main controller and is used for acquiring active power, reactive power and a power factor according to the voltage of the main loop and the current of the main loop and transmitting the active power, the reactive power and the power factor to the main controller.
According to one embodiment of the invention, the internal communication module is further in communication with the external communication module, the external communication module is connected with the capacitor switching switch, the capacitor switching switch is arranged between the power factor correction capacitor and the main loop, and the main controller is further used for generating a capacitor switching signal according to reactive power and the power factor and sending the capacitor switching signal to the capacitor switching switch through the internal communication module and the external communication module so as to switch the power factor correction capacitor to the main loop or cut the power factor correction capacitor from the main loop through the capacitor switching switch.
According to one embodiment of the invention, the circuit breaker further comprises: the actuator is connected with the main controller, and the main controller is also used for controlling the on/off of the main loop by controlling the actuator to drive the switch to be on/off
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural view of an intelligent low-voltage circuit breaker according to a first embodiment of the present invention;
Fig. 2 is a schematic structural view of an intelligent low-voltage circuit breaker according to a second embodiment of the present invention;
Fig. 3 is a schematic structural view of an intelligent low-voltage circuit breaker according to a third embodiment of the present invention;
Fig. 4 is a schematic structural view of an intelligent low-voltage circuit breaker according to a fourth embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The intelligent low-voltage circuit breaker according to the embodiment of the invention is described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of an intelligent low-voltage circuit breaker according to a first embodiment of the present invention, and referring to fig. 1, the intelligent low-voltage circuit breaker 10 includes: an encryption unit 100, a power carrier unit 110, and a main controller 120.
Wherein the encryption unit 100 is used for encrypting data information; the power carrier unit 110 is configured to perform transmission of data information through a power line; the main controller 120 is connected to the encryption unit 100 and the power carrier unit 110, and is configured to encrypt the data information of the circuit breaker by the encryption unit 100, and send the encrypted data information to an external device by the power carrier unit 110.
Specifically, the existing circuit breaker and external equipment are usually communicated in an RS-485 wired connection mode, and are affected by a plurality of environmental factors such as field bus arrangement, communication distance and the like, the low-voltage circuit breaker can only be installed in the same power distribution cabinet or very close equipment, so that the data information acquisition communication range is severely limited, the acquired data is transmitted in a plaintext mode, and the communication content is easy to be illegally acquired by a third party, so that potential safety hazards of the data exist.
Based on the above, in the present application, the encryption unit 100, the power carrier unit 110 and the main controller 120 are disposed inside the intelligent low-voltage circuit breaker 10, and in the working process of the intelligent low-voltage circuit breaker 10, the main controller 120 controls the encryption unit 100 to encrypt the obtained data information and sends the encrypted data information to the external device through the power carrier unit 110, so as to realize the power carrier encryption transmission of the data, and the inspection personnel is not required to go to the scene to check the circuit breaker, and the running state or the fault condition of the intelligent low-voltage circuit breaker can be obtained through the external device at a far distance, thereby effectively solving the defect that the wired connection communication cannot be transmitted remotely, expanding the data information acquisition communication range, simultaneously avoiding the illegal acquisition of the communication data and improving the safety of the data transmission.
In some embodiments, as shown in fig. 2, the encryption unit 100 includes: the data input and output ends of the encryption chip IC and the switch tube Q1 are connected with the main controller 120; the control end of the switching tube Q1 is connected with the main controller 120, the first end of the switching tube Q1 is connected with a preset power supply VCC, the second end of the switching tube Q1 is connected with the power end of the encryption chip IC, and the main controller 120 is also used for controlling the on or off of the switching tube Q1 so as to control the encryption chip IC to work or stop working
Further, as shown with continued reference to fig. 2, the encryption unit 100 further includes: and the filter capacitor C1 is connected between the second end of the switch tube Q1 and the ground.
Specifically, when the intelligent low-voltage circuit breaker 10 works, the main controller 120 controls the switching tube Q1 to be turned on to power on the encryption chip IC, the encryption chip IC receives data information from the main controller 120 through the data input end after being powered on, the encryption chip IC encrypts the obtained data information while obtaining the data, the main controller 120 controls the encryption chip IC to encrypt the obtained data information, the encrypted data information is fed back to the main controller 120 again through the data output end of the encryption chip IC, and the main controller 120 transmits the encrypted data to the external device through the power carrier unit 110, so that the power carrier encryption transmission of the data is realized. The selected encryption chip IC has a plurality of security protection mechanisms such as SM1, SM2, SM3 cryptographic algorithm, true random number generator, etc., and the encryption chip IC is not particularly limited herein, and can effectively ensure confidentiality and integrity of data transmission and storage.
In some embodiments, as shown in fig. 3, the circuit breaker further comprises: the switch 130, the built-in temperature detecting member 140 and the built-in temperature collector 150, wherein the switch 130 is connected in a main circuit of the circuit breaker through an internal wiring terminal of the circuit breaker; the built-in temperature detecting member 140 is disposed corresponding to the internal connection terminal, and is configured to detect a temperature of the internal connection terminal and output a corresponding first voltage signal; the built-in temperature collector 150 is connected with the built-in temperature detecting element 140 and is used for collecting a first voltage signal; the main controller 120 is further connected to a built-in temperature collector 150, and is configured to obtain the temperature of the internal connection terminal according to the first voltage signal and perform over-temperature protection.
Further, as shown in fig. 3, the internal connection terminal includes a plurality of internal incoming connection terminals and a plurality of internal outgoing connection terminals, and the built-in temperature detecting member 140 includes a plurality of first thermocouples V1, where each internal incoming connection terminal and/or each internal outgoing connection terminal is respectively and correspondingly provided with a first thermocouple V1.
Further, as shown with continued reference to fig. 3, the circuit breaker further includes: the first optocoupler isolator 160 is disposed between the built-in temperature collector 150 and the main controller 120, and is used for optocoupler isolating the first voltage signal.
It should be noted that, in the distribution circuit layout of the conventional circuit breaker, various temperature sensors are arranged outside the conventional circuit breaker, and temperature sensors provided by different manufacturers adopt different communication protocols, and are required to be installed and debugged respectively, so that the problems of longer construction period, disordered wiring, higher failure rate and the like are caused.
Based on this, in the present application, a switch 130, an internal temperature detecting member 140 and an internal temperature collector 150 are further disposed inside the intelligent low-voltage circuit breaker 10, specifically, the internal wiring terminals include a plurality of internal wiring terminals and a plurality of internal wiring terminals, as shown in fig. 3, the internal wiring terminals of the circuit breaker include four internal wiring terminals and four internal wiring terminals, and each internal wiring terminal and/or each internal wiring terminal is respectively and correspondingly provided with a first thermocouple V1, the description is given by taking the case that each internal wiring terminal and each internal wiring terminal are respectively and correspondingly provided with a first thermocouple V1 as an example, namely, eight first thermocouples V1 are correspondingly disposed on the four internal wiring terminals and the four internal wiring terminals, when the circuit breaker works, the switch 130 is closed, the temperature of the internal wiring terminals of the main circuit is detected by the first thermocouples V1 in the internal temperature detecting member 140, and corresponding first voltage signals are generated and transmitted to the internal temperature collector 150, the internal temperature collector 150 feeds back the obtained first voltage signals to the internal temperature collector, wherein if the temperature collector is connected to the main controller 120, and if the main controller is connected to the main controller 120, the main controller is provided with a normal voltage signal, the main controller is encrypted, and if the temperature signal is encrypted, the normal voltage signal is obtained by the main controller chip, the main controller is encrypted by the first thermocouple 120, and the normal voltage signal is obtained by the main controller 120, and the remote detection of the temperature information of the internal wiring terminal of the circuit breaker is facilitated.
It should be noted that, in the above embodiment, only the case that each internal wire inlet connection terminal and each internal wire outlet connection terminal are respectively and correspondingly provided with one first thermocouple V1 is described, and in the present application, only each internal wire inlet connection terminal is respectively and correspondingly provided with one first thermocouple V1, and each internal wire outlet connection terminal is not correspondingly provided with one first thermocouple V1; or each internal outgoing line wiring terminal is respectively and correspondingly provided with a first thermocouple V1, and each internal incoming line wiring terminal is not correspondingly provided with the first thermocouple V1, and the working process is similar to that of each internal incoming line wiring terminal and each internal outgoing line wiring terminal which are respectively and correspondingly provided with the first thermocouple V1, and the details are not repeated here.
Therefore, through integrating the switch, the built-in temperature detection piece, the built-in temperature collector and the first optocoupler isolator inside the intelligent low-voltage circuit breaker so as to realize the real-time detection of the temperature of the internal wiring terminal of the intelligent low-voltage circuit breaker, the temperature monitoring of the low-voltage circuit breaker can be realized without arranging a temperature sensor in a distribution circuit, so that the equipment types can be reduced, the construction period and the fault point can be shortened, the purpose of greatly saving the construction cost of the distribution circuit can be achieved, meanwhile, the temperature detection information can be transmitted to external equipment through the encryption of a power carrier, the remote monitoring of the temperature information of the internal wiring terminal of the circuit breaker is realized, and the working state or the fault condition of the intelligent low-voltage circuit breaker can be obtained without the need of inspection personnel to spot inspection on site.
In some embodiments, as shown in fig. 3, the circuit breaker further comprises: the internal communication module 170 is in communication with the external temperature collector 180, and is used for receiving a second voltage signal collected by the external temperature collector 180, wherein the external temperature collector 180 is connected with the external temperature detection element 190, and the external temperature detection element 190 is arranged corresponding to an external wiring terminal of the circuit breaker and is used for detecting the temperature of the external wiring terminal and outputting a corresponding second voltage signal; the main controller 120 is further connected to the internal communication module 170, and is configured to obtain the temperature of the external connection terminal according to the second voltage signal and perform over-temperature protection.
Further, as shown in fig. 3, the external connection terminal includes a plurality of external incoming connection terminals and a plurality of external outgoing connection terminals, and the external temperature detecting member 190 includes a plurality of second thermocouples V2, where each external incoming connection terminal and/or each external outgoing connection terminal is respectively and correspondingly provided with a second thermocouple V2.
Further, as shown with continued reference to fig. 3, the circuit breaker further includes: the second optocoupler isolator 200, the second optocoupler isolator 200 is disposed between the internal communication module 170 and the main controller 120, for optocoupler isolating the second voltage signal.
Specifically, in order to detect the temperature of the external important connection terminal of the low-voltage circuit breaker, the circuit breaker further comprises an internal communication module 170, the internal communication module 170 is used for communicating with the external temperature collector 180 to obtain the temperature of the external connection terminal detected by the external temperature detection piece 190, in this implementation, the external connection terminal comprises a plurality of external wire connection terminals and a plurality of external wire connection terminals, as shown in fig. 3, the external connection terminal of the circuit breaker comprises four external wire connection terminals and four external wire connection terminals, and each external wire connection terminal and/or each external wire connection terminal is correspondingly provided with a second thermocouple V2, taking each external wire connection terminal and each external wire connection terminal as an example, namely, the four external wire connection terminals and the four external wire connection terminals are correspondingly provided with eight second thermocouples V2, when the circuit breaker works, the temperature of the external connection terminal around the main circuit is detected by the second thermocouples V2 in the external temperature detection piece 190, and corresponding second voltage signals are generated and transmitted to the external temperature collector 180, if the temperature of the circuit breaker is detected by the second thermocouples 180, the second thermocouple signals are obtained by the second thermocouples, if the temperature collector 180 is normally connected with the main controller, the circuit breaker is isolated by the normal temperature collector, and the circuit breaker is controlled by the second thermocouple 120, if the normal temperature signals are obtained by the second thermocouple connection terminal, and the normal temperature collector is obtained, meanwhile, the obtained temperature information can be transmitted to external equipment through the power carrier unit 110 after being encrypted by the encryption chip IC, so that remote detection of the temperature information of the external terminals around the circuit breaker is facilitated.
It should be noted that, in the above embodiment, only the case that each external incoming wire connecting terminal and each external outgoing wire connecting terminal are respectively and correspondingly provided with one second thermocouple V2 is described, and in the present application, only each external incoming wire connecting terminal is respectively and correspondingly provided with one second thermocouple V2, and each external outgoing wire connecting terminal is not correspondingly provided with one second thermocouple V2; or each external outgoing line wiring terminal is respectively and correspondingly provided with a second thermocouple V2, and each external incoming line wiring terminal is not correspondingly provided with the second thermocouple V2, and the working process is similar to that of each external incoming line wiring terminal and each external outgoing line wiring terminal which are respectively and correspondingly provided with the second thermocouple V2, and the details are not repeated here.
Therefore, the external temperature collector is used for acquiring the temperature information of the external wiring terminals around the circuit breaker, the temperature data is transmitted to the main controller through the internal communication module, the real-time detection of the temperature of the external wiring terminals around the intelligent low-voltage circuit breaker is realized, the temperature detection information can be transmitted to external equipment through current carrier encryption, the remote monitoring of the temperature information of the external wiring terminals around the circuit breaker is realized, and the working state or fault condition of the external key external wiring terminal nodes around the intelligent low-voltage circuit breaker can be obtained without the need of inspection personnel to check on site.
In some embodiments, as shown in fig. 4, the circuit breaker further includes: the voltage detection element 210, the current detection element 220 and the processor 230, wherein the voltage detection element 210 is disposed on the main loop for obtaining the voltage of the main loop; the current detecting element 220 is disposed on the main circuit, and is used for obtaining the current of the main circuit; the processor 230 is connected to the voltage detecting unit 210, the current detecting unit 220 and the main controller 120, respectively, and is used for obtaining active power, reactive power and power factor according to the voltage of the main loop and the current of the main loop, and sending the active power, reactive power and power factor to the main controller 120.
That is, the voltage detecting element 210, the current detecting element 220 and the processor 230 are used in the intelligent low-voltage circuit breaker 10 to monitor the main circuit, specifically, when the circuit breaker works, the processor 230 works in cooperation with the voltage detecting element 210 and the current detecting element 220, and can precisely measure the electric signals such as the voltage, the current, the active power, the reactive power, the power factor and the like of the main circuit, and send the obtained electric signal data information to the main controller 120, and the main controller 120 controls the encryption unit 100 to encrypt the obtained electric signal data information and wirelessly transmit the encrypted electric signal data information to the external device through the power carrier unit 110, thereby realizing the power carrier encryption transmission of the electric signal data information. Alternatively, the voltage detecting element and the current detecting element may be a high-precision voltage transformer and a high-precision current transformer, respectively, which is not particularly limited.
Therefore, the voltage detection part, the current detection part and the processor are integrated in the intelligent low-voltage circuit breaker, so that the intelligent low-voltage circuit breaker can detect internal electric signals in real time, the electric signal data information can be transmitted to external equipment through power carrier encryption, the remote monitoring of the electric signals in the circuit breaker is realized, and the working state or fault condition of the intelligent low-voltage circuit breaker can be obtained without the need of inspection personnel to check on site.
In some embodiments, as shown in fig. 4, the internal communication module 170 is further in communication with the external communication module 240, the external communication module 240 is connected to the capacitor switching switch 250, the capacitor switching switch 250 is disposed between the pfc capacitor C2 and the main loop, and the main controller 120 is further configured to generate a capacitor switching signal according to reactive power and the pfc and send the capacitor switching signal to the capacitor switching switch 250 through the internal communication module 170 and the external communication module 240, so as to switch the pfc capacitor C2 to the main loop or cut the capacitor switching switch 250 from the main loop.
Specifically, referring to fig. 4, the intelligent low voltage circuit breaker 10 may obtain reactive power and power factor of the main circuit through the built-in voltage detecting part 210, the current detecting part 220 and the processor 230, the main controller 120 may generate a capacitor switching signal according to the obtained reactive power and power factor, and transmit the capacitor switching signal to the capacitor switching switch 250 through the external communication module 240 through the internal communication module 170, and the capacitor switching switch 250 switches the power factor correction capacitor C2 to or from the main circuit according to the capacitor switching signal, thereby realizing the control of the intelligent low voltage circuit breaker directly to the capacitor switching switch without the need of controlling the capacitor switching switch through externally adding a conventional capacitor controller.
In some embodiments, as shown in fig. 4, the circuit breaker further includes: the actuator 260, the actuator 260 is connected with the main controller 120, and the main controller 120 is further configured to control the switch 130 to be turned on or off by controlling the actuator 260, so as to control the main circuit to be turned on or off. That is, when the circuit breaker is operated, the main controller 120 drives the switch to be turned on by controlling the actuator 260 to control the main circuit to be turned on, and when the circuit breaker is not operated, the main controller 120 drives the switch to be turned off by controlling the actuator 260 to control the main circuit to be turned off, thereby realizing flexible control of the circuit breaker.
In summary, according to the intelligent low-voltage circuit breaker provided by the embodiment of the invention, the corresponding temperature detection device is built in the intelligent low-voltage circuit breaker to realize real-time detection of the temperature of the internal and external wiring terminals of the intelligent low-voltage circuit breaker, the electric signal detection device is built in the intelligent low-voltage circuit breaker to realize real-time detection of the internal electric signal, and the intelligent low-voltage circuit breaker is used for directly controlling the capacitor switching switch, so that the control of the capacitor switching switch by externally adding a traditional capacitor controller is avoided, meanwhile, acquired data information such as voltage, current and temperature is transmitted to external equipment through the power carrier unit and the encryption unit through the power carrier encryption, the defect that the data cannot be transmitted remotely is effectively solved, the data information acquisition communication range is expanded, meanwhile, illegal acquisition of communication data can be avoided, and the safety of data transmission is improved.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a ordered listing of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. An intelligent low voltage circuit breaker, characterized in that the circuit breaker comprises:
an encryption unit configured to encrypt data information;
The power carrier unit is used for transmitting data information through a power line;
The main controller is respectively connected with the encryption unit and the power carrier unit and is used for encrypting the data information of the circuit breaker through the encryption unit and sending the encrypted data information to external equipment through the power carrier unit;
the encryption unit includes:
the data input and output end of the encryption chip is connected with the main controller;
The circuit breaker further comprises:
The voltage detection piece is arranged on the main loop and used for acquiring the voltage of the main loop;
The current detection piece is arranged on the main loop and used for acquiring the current of the main loop;
the processor is respectively connected with the voltage detection part, the current detection part and the main controller, and is used for acquiring active power, reactive power and a power factor according to the voltage of the main loop and the current of the main loop and sending the active power, the reactive power and the power factor to the main controller;
The internal communication module is communicated with the external communication module, the external communication module is connected with the capacitor switching switch, the capacitor switching switch is arranged between the power factor correction capacitor and the main loop, and the main controller is further used for generating a capacitor switching signal according to reactive power and the power factor and sending the capacitor switching signal to the capacitor switching switch through the internal communication module and the external communication module so as to switch the power factor correction capacitor to the main loop or cut the power factor correction capacitor from the main loop through the capacitor switching switch.
2. The intelligent low voltage circuit breaker according to claim 1, wherein the encryption unit comprises:
The control end of the switching tube is connected with the main controller, the first end of the switching tube is connected with a preset power supply, the second end of the switching tube is connected with the power supply end of the encryption chip, and the main controller is further used for controlling the switching tube to be turned on or off so as to control the encryption chip to work or stop working.
3. The intelligent low voltage circuit breaker according to claim 2, wherein the encryption unit further comprises:
And the filter capacitor is connected between the second end of the switch tube and the ground.
4. The intelligent low voltage circuit breaker of claim 1, wherein the circuit breaker further comprises:
the switch is connected in a main loop of the circuit breaker through an internal wiring terminal of the circuit breaker;
the built-in temperature detection piece is arranged corresponding to the internal wiring terminal and is used for detecting the temperature of the internal wiring terminal and outputting a corresponding first voltage signal;
the built-in temperature collector is connected with the first temperature detection piece and used for collecting the first voltage signal;
the main controller is also connected with the built-in temperature collector and is used for acquiring the temperature of the internal wiring terminal according to the first voltage signal and performing over-temperature protection.
5. The intelligent low-voltage circuit breaker according to claim 4, wherein the internal wiring terminals comprise a plurality of internal incoming wiring terminals and a plurality of internal outgoing wiring terminals, the built-in temperature detecting member comprises a plurality of first thermocouples, and each internal incoming wiring terminal and/or each internal outgoing wiring terminal is provided with one corresponding first thermocouple.
6. The intelligent low voltage circuit breaker according to claim 4 or 5, characterized in that said circuit breaker further comprises:
The first optical coupler isolator is arranged between the built-in temperature collector and the main controller and is used for carrying out optical coupler isolation on the first voltage signal.
7. The intelligent low voltage circuit breaker of claim 1, wherein the circuit breaker further comprises:
The internal communication module is communicated with the external temperature collector and is used for receiving a second voltage signal acquired by the external temperature collector, wherein the external temperature collector is connected with an external temperature detection piece, and the external temperature detection piece is arranged corresponding to an external wiring terminal of the circuit breaker and is used for detecting the temperature of the external wiring terminal and outputting the corresponding second voltage signal;
The main controller is also connected with the internal communication module and is used for acquiring the temperature of the external wiring terminal according to the second voltage signal and performing over-temperature protection.
8. The intelligent low-voltage circuit breaker according to claim 7, wherein the external connection terminals comprise a plurality of external incoming connection terminals and a plurality of external outgoing connection terminals, the external temperature detection member comprises a plurality of second thermocouples, and each external incoming connection terminal and/or each external outgoing connection terminal is provided with one second thermocouple respectively.
9. The intelligent low voltage circuit breaker according to claim 7 or 8, characterized in that said circuit breaker further comprises:
the second optical coupler isolator is arranged between the internal communication module and the main controller and is used for carrying out optical coupler isolation on the second voltage signal.
10. The intelligent low voltage circuit breaker of claim 4, wherein the circuit breaker further comprises:
And the actuator is connected with the main controller, and the main controller is also used for controlling the main loop to be switched on or off by controlling the actuator to drive the switch to be switched on or off.
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