CN116682705A - Intelligent circuit breaker and control method thereof - Google Patents
Intelligent circuit breaker and control method thereof Download PDFInfo
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- CN116682705A CN116682705A CN202310852127.5A CN202310852127A CN116682705A CN 116682705 A CN116682705 A CN 116682705A CN 202310852127 A CN202310852127 A CN 202310852127A CN 116682705 A CN116682705 A CN 116682705A
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- Prior art keywords
- circuit board
- circuit breaker
- wiring board
- control module
- circuit
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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
- H01H71/04—Means for indicating condition of the switching device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
- H02J13/00026—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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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
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2213/00—Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network
- H02J2213/10—Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network using simultaneously two or more different transmission means
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Breakers (AREA)
Abstract
The application provides an intelligent circuit breaker and a control method thereof, which belong to the technical field of circuit breakers, wherein the circuit breaker comprises three main switch loops, an operating mechanism in linkage fit with the main switch loops, a first circuit board, a second circuit board, a control module, a multimode communication module, a release, a relay and a switch power supply.
Description
Technical Field
The application relates to the technical field of circuit breakers, in particular to an intelligent circuit breaker and a control method thereof.
Background
A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and closing, carrying and opening a current under abnormal circuit conditions within a prescribed time.
The low-voltage intelligent circuit breaker has normal connection and disconnection of a power distribution line, overload and short-circuit protection functions, integrates a metering module and a carrier communication module with high precision and high stability, has the functions of automatically identifying a platform area topology, encrypting communication, quickly determining low-voltage fault information and the like, realizes the visualization of the platform area, real-time analysis of dynamic topology, line loss lean analysis, fault accurate positioning, power failure and phase failure monitoring, visual emergency repair process, comprehensive energy service and the like through liquid crystal display, has high integration level, flexible configuration and friendly interface, can be widely applied to a three-phase four-wire power distribution network with 400V alternating voltage, and protects the safe and effective operation of the power distribution line and power supply equipment.
In order to realize monitoring such as electric energy, temperature among the prior art intelligent circuit breaker need set up a plurality of detecting element and a plurality of circuit board, need be connected through a large amount of pencil between detecting element and the circuit board, the inside originally structure of circuit breaker is complicated moreover, space is tension, the wire harness is redundant to lead to the inside temperature rise of circuit breaker easily, still can influence the action of main switch return circuit, especially still need install parts that occupy a large amount of spaces such as current transformer, therefore the inside reasonable overall arrangement of circuit breaker is very important.
Disclosure of Invention
The application aims to overcome the defects and the shortcomings of the prior art and provides an intelligent circuit breaker and a control method thereof.
The technical scheme adopted by the application is as follows: the intelligent circuit breaker comprises three main switch loops, an operating mechanism in linkage fit with the main switch loops, a first circuit board, a second circuit board, a control module, a multimode communication module, a release, a relay and a switching power supply, wherein the control module comprises a liquid crystal display screen, the main switch loops comprise front-end wiring boards, flexible wires, rotating shafts, arc extinguishing chambers and rear-end wiring boards, the arc extinguishing chambers comprise breaking channels, one ends of the front-end wiring boards extend into the breaking channels and are provided with fixed contacts, and one ends of the rotating shafts extend into the breaking channels and are provided with moving contacts;
the multi-mode communication module comprises an independent shell, wherein the independent shell is arranged above the second circuit board and is connected with the control module in an inserting mode, the second circuit board is arranged above the rear end circuit board, and the second circuit board is provided with a rear end temperature signal acquisition structure and a rear end electric energy acquisition signal structure corresponding to each rear end circuit board;
the rotating shaft is arranged above a first circuit board, two micro switches in linkage fit with the rotating shaft are arranged on the first circuit board, three piezoresistors are arranged on the first circuit board side by side with the micro switches, the tripper is assembled with the operating mechanism and is connected to a second circuit board in a switching mode, a neutral line interface is arranged on the second circuit board, and a signal switching structure is arranged between the first circuit board and the second circuit board.
The circuit board is characterized by further comprising a shell, wherein independent cavities are arranged in the shell, and the first circuit board, the second circuit board and the control module are respectively installed and used for being isolated from the main switch loop.
The shell is internally provided with a switching housing, the second circuit board is arranged in the switching housing, the rear end temperature signal acquisition structure comprises a rear end temperature acquisition element, the tail end of the rear end temperature acquisition element is abutted to a rear end wiring board, the switching housing is provided with an isolation cylinder corresponding to the rear end temperature acquisition element, and the isolation cylinder wraps the rear end temperature acquisition element.
The rear-end electric energy collection signal structure comprises a pin socket, one end of the pin socket is connected with three rear-end wiring boards respectively, and the other end of the pin socket is connected with a second wiring board in an inserting mode.
The front-end temperature signal acquisition structure comprises a front-end temperature acquisition element and an insulating cover, wherein the insulating cover is used for isolating the front-end temperature acquisition element from the front-end electric energy signal acquisition structure, the tail end of the front-end temperature acquisition element is abutted to a front-end wiring board, and the insulating cover wraps the front-end temperature acquisition element.
The arc extinguishing chamber comprises a plurality of arc extinguishing grid plates, and one side, close to the front end wiring board, of each arc extinguishing grid plate is inclined upwards.
The control method applied to the intelligent circuit breaker comprises the following steps:
the steps are as follows: the switching power supply is connected into each module by the front-end wiring board;
the steps are as follows: the front-end temperature signal acquisition structure and the front-end electric energy signal acquisition structure acquire current, voltage and temperature signals of the front end of the circuit breaker to a first circuit board, and the first circuit board transfers the signals to a second circuit board;
the steps are as follows: the rear-end temperature signal acquisition structure and the rear-end electric energy acquisition signal structure acquire current, voltage and temperature signals of the rear end of the circuit breaker to the second circuit board;
the steps are as follows: the integrated current transformer collects current and voltage signals of the main switch loop to the second circuit board;
the steps are as follows: the second circuit board transfers all the collected signals to the control module, the control module monitors, and when various abnormal states occur, the control module controls the main switch circuit to trip.
The beneficial effects of the application are as follows: 1. according to the application, the front and rear ends of the circuit breaker and the main switch loop are subjected to electric energy signal acquisition, so that the monitoring of electric energy quality is enhanced, meanwhile, the temperature signals of the front and rear ends are acquired, the acquired signals are transferred to the control module to realize data analysis, self-diagnosis, topology identification and the like, and the multimode communication module can realize remote monitoring and control of the circuit breaker.
2. According to the application, the static contact and the moving contact are positioned in the arc extinguishing chamber to be disconnected, so that the arc extinguishing efficiency is improved, meanwhile, the circuit boards with the acquisition function are arranged close to the acquisition end, the circuit boards with the processing function are integrated in the control module, a large number of wire harnesses are reduced, the production cost is reduced, and the internal temperature rise of the circuit breaker is avoided.
3. The control module adopts a module structure of an independent shell, and the multimode communication module is a standard component and is directly inserted into the control module, so that standardized production is facilitated, and meanwhile, the module is convenient to assemble and disassemble and convenient to maintain and repair.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that it is within the scope of the application to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is an exploded view of the present application;
FIG. 2 is a second exploded view of the present application;
FIG. 3 is a cross-sectional view of the present application;
FIG. 4 is a schematic view of a transfer housing of the present application;
FIG. 5 is a schematic diagram of a first circuit board according to the present application;
FIG. 6 is a block diagram of a control method according to the present application;
FIG. 7 is a graph of power quality monitoring requirements in accordance with the present application;
FIG. 8 is a schematic diagram of a constant-resistance load characteristic code bit according to the present application;
FIG. 9 is a waveform diagram of constant resistance load characteristics in the present application;
FIG. 10 is a schematic diagram of a constant current load feature bit in the present application;
fig. 11 is a waveform diagram of a constant current load characteristic in the present application.
Detailed Description
The application will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the application and therefore show only the structures which are relevant to the application.
In the description of the present application, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the description of the present application, it should be noted that, in the embodiments of the present application, all the expressions "first" and "second" are used for distinguishing two entities with the same name and non-same parameters, and it is noted that the "first" and "second" are merely for convenience of description, and should not be construed as limiting the embodiments of the present application, and the following embodiments are not described in any way.
As shown in fig. 1 to 11, an embodiment of the present application is provided:
the intelligent circuit breaker comprises three main switch loops 1 and an operating mechanism 2 in linkage fit with the main switch loops 1, wherein the operating mechanism 2 can simultaneously control the opening and closing of the three main switch loops 1, and the structure of the operating mechanism 2 can refer to a three-phase three-wire molded case circuit breaker in the prior art.
The circuit breaker is characterized by further comprising a first circuit board 3, a second circuit board 4, a control module 5, a multimode communication module 6, a release 7, a relay and a switching power supply, wherein the release 7 and the relay adopt devices commonly used for a molded case circuit breaker in the prior art, the control module 5 comprises a liquid crystal display screen, the main switching circuit 1 comprises a front-end wiring board 101, a flexible wire 102, a rotating shaft 103, an arc extinguishing chamber 104 and a rear-end wiring board 105, the arc extinguishing chamber 104 comprises a breaking channel 106, one end of the front-end wiring board 101 extends into the breaking channel 106 and is provided with a fixed contact, and one end of the rotating shaft 103 extends into the breaking channel 106 and is provided with a movable contact; the static contact and the moving contact are positioned in the arc extinguishing chamber to be disconnected, so that the arc extinguishing efficiency is improved.
The first circuit board 3 sets up in front end wiring board 101 below, correspond every front end wiring board 101 on the first circuit board 3 and all be provided with front end temperature signal acquisition structure 8 and front end electric energy signal acquisition structure 9, first circuit board 3 is close to rear end wiring board 105 one side and is provided with integral type current transformer 10, flexible conductor 102 passes integral type current transformer 10 and both ends respectively with pivot 103 and rear end wiring board 105 are connected, second circuit board 4 sets up in integral type current transformer 10 top and both peg graft mutually, control module 5 is including independent casing, and it sets up in second circuit board 4 top and both peg graft mutually, control module 6 peg graft in control module 5, and control module 5 adopts the module structure of independent casing, and multimode communication module is the standard part and directly peg graft in control module 5, and both can support hot plug, are favorable to standardized production, and the dismouting is convenient simultaneously, and maintenance are convenient, and control module 5 keep away from the explosion chamber setting in addition, produces the influence of high temperature when breaking.
The second circuit board 4 is located above the rear-end wiring boards 105, the second circuit board 4 is provided with a rear-end temperature signal acquisition structure 11 and a rear-end electric energy acquisition signal structure 12 corresponding to each rear-end wiring board 105, the rotating shaft 103 is arranged above the first circuit board 3, the first circuit board 3 is provided with two micro switches 13 which are in linkage fit with the rotating shaft 103, the first circuit board 3 is provided with three piezoresistors 14 side by side with the micro switches 13, the tripper 7 is assembled with the operating mechanism 2 and is connected to the second circuit board 4in an adapting way, the second circuit board 4 is provided with a neutral line interface 15, a signal switching structure 16 is arranged between the first circuit board 3 and the second circuit board 4, the signal switching structure 16 can be a male-row bus connection structure or a socket pin structure, the monitoring of the electric energy quality is enhanced by carrying out electric energy signal acquisition on the front and rear ends of the circuit breaker and a main switch loop, meanwhile, the acquired signals are switched to a control module, a self-diagnosis module, a communication module can realize the monitoring of the circuit breaker, and the remote control module can realize the monitoring of the circuit breaker; the circuit boards with the collection function are all close to the collection end, the circuit boards with the processing function are integrated in the control module, a large number of wire harnesses are omitted, production cost is reduced, internal temperature rise of the circuit breaker is avoided, front-end signals are sequentially transferred through the first circuit board, the second circuit board and the control module, wire harness routing and wiring are prevented from penetrating through the main switch loop to interfere with actions of the main switch loop, and the circuit breaker is reasonable in layout and fully utilizes the internal space of the circuit breaker.
The circuit board is characterized by further comprising a shell, wherein independent cavities are arranged in the shell, the first circuit board 3, the second circuit board 4 and the control module 5 are respectively installed, and are used for being isolated from the main switch loop 1, so that strong and weak electricity can be isolated, the circuit board is prevented from being damaged by strong electricity in the main switch loop, and corresponding installation cavities are also arranged corresponding to the three main switch loops 1.
The casing is internally provided with a transfer housing 17, the second circuit board 4 is arranged in the transfer housing 17, the transfer housing 17 is adopted to wrap and protect the second circuit board 4, breaking gas is prevented from being reversely sprayed to damage the second circuit board 4, the rear end temperature signal acquisition structure 11 comprises a rear end temperature acquisition element 111, the tail end of the rear end temperature acquisition element 111 is abutted to a rear end wiring board 105, the transfer housing 17 is provided with a separation barrel 171 corresponding to the rear end temperature acquisition element 111, the separation barrel 171 wraps the rear end temperature acquisition element 111, in the embodiment, the temperature acquisition element 111 is cylindrical, the separation barrel 171 is matched with the shape of the temperature acquisition element 111 and sleeved outside the separation barrel, temperature signals are acquired through the temperature acquisition element 111, a lead wire and wiring are avoided, the internal regularity of the circuit breaker is ensured, and the temperature acquisition element 111 is wrapped with the separation barrel 171, so that the temperature acquisition element 111 only acquires temperature signals through the tail end, and the accuracy of temperature detection is prevented from being influenced by multipoint acquisition.
Specifically, the adapter housing 17 is provided with an acquisition circuit board installation cavity, the isolation cylinder 171 is provided with a channel 172 for the temperature acquisition element 111 to pass through, the isolation cylinder 171 and the adapter housing 17 are integrally formed, the adapter housing 17 is an insulating piece made of plastic materials, and can be integrally injection molded, so that the production efficiency is improved, the channel 172 is communicated with the acquisition circuit board installation cavity, and the second circuit board 4 is embedded in the acquisition circuit board installation cavity, so that effective protection and stable support are formed.
The rear-end wiring board 105 is provided with a wiring terminal, a separation plate 173 is arranged between the wiring terminal and the separation barrel 172, the wiring position is prevented from generating electric arcs to influence the acquisition of temperature signals, the separation plate 173 and the transfer housing 17 are integrally formed, the assembly process is simplified, and the production efficiency is improved.
The collection circuit board installation cavity diapire is provided with support rib and fixed column, second circuit board 4 sets up on the support rib and is connected with the fixed column through the fastener, reduces the area of contact of second circuit board 4 and collection circuit board installation cavity diapire, leaves the heat dissipation space, prolongs the life of second circuit board 4.
The rear-end electric energy collection signal structure 12 comprises a pin strip 121, one end of the pin strip 121 is respectively connected with the three rear-end wiring boards 105, the other end of the pin strip is spliced with the second wiring board 4, the connection is convenient, and the collection structure is simplified.
The front-end temperature signal acquisition structure 8 comprises a front-end temperature acquisition element 81 and an insulating cover 18, wherein the insulating cover 18 is used for isolating the front-end temperature acquisition element 81 from the front-end electric energy signal acquisition structure 9 and preventing breakdown of a current acquisition signal and a temperature acquisition signal; the end of the front end temperature collecting element 81 is abutted to the front end wiring board 101, the insulating cover 18 wraps the front end temperature collecting element 81, and the structure has the same effect as the rear end temperature signal collecting structure 11.
The arc extinguishing chamber 104 comprises a plurality of arc extinguishing grid plates 107, and one side of the arc extinguishing grid plates 107 close to the front end wiring board 101 is inclined upwards, so that breaking gas is discharged out of the shell rapidly, and damage to the first circuit board 3 is avoided.
The control method applied to the intelligent circuit breaker comprises the following steps:
step 1: the switching power supply is accessed to each module by the front-end wiring board 101; the front-end electric energy signal acquisition structure 9 can be used for taking electricity, and under the condition of no voltage power supply or no external auxiliary power supply, all phase currents of the main circuit are not less than 0.4In, and the control module 5 can reliably work and has a basic protection function; when the current of any phase of the main circuit is less than 0.4In, the circuit breaker should not malfunction. The circuit breaker also comprises a backup power supply, when the main power supply of the circuit breaker is insufficient in power supply or has a power failure, the backup power supply should ensure that the electric quantity data before the power failure and the power failure event are stored and not lost; when the backup power supply works, and when the main power supply of the circuit breaker is restored, the circuit breaker can work normally; the backup power supply life should be synchronized with the control module 5 life.
Step 2: the front-end temperature signal acquisition structure 8 and the front-end electric energy signal acquisition structure 9 acquire current, voltage and temperature signals of the front end of the circuit breaker to the first circuit board 3, and the first circuit board 3 transfers the signals to the second circuit board 4;
step 3: the rear-end temperature signal acquisition structure 11 and the rear-end electric energy acquisition signal structure 12 acquire current, voltage and temperature signals of the rear end of the circuit breaker to the second circuit board 4;
step 4: the integrated current transformer 10 collects current and voltage signals of the main switch loop 1 to the second circuit board 4;
step 5: the second circuit board 4 transfers all the collected signals to the control module 5, the control module 5 monitors, and when various abnormal states occur, the control module 5 controls the main switch loop 1 to trip. For example, when the panel temperature exceeds a threshold, the circuit breaker should sound an alarm and trip.
The multimode communication module 6 uploads the signal to a server and can remotely control a breaker, such as opening and closing; the multimode communication module 7 adopts a communication module commonly used in the market, supports low-power consumption Bluetooth communication of 5.0 and above, has at least 1 path of RS-485 communication, has serial port rate of 2400 bps-115200 bps, preferably 9600 bps, and has even check, and stop bit of 1; the high-speed power line carrier communication is provided, and three-phase line simultaneous communication can be supported.
In the embodiment, on the basis of the limited internal space of a conventional three-phase three-wire molded case circuit breaker, the electric energy quality monitoring, basic protection, state monitoring, communication functions, data recording, parameter setting and query, self-diagnosis, information safety protection, functional integration are integrated, the space arrangement is reasonable, the control module 5, the multimode communication module 6 and the switch are designed in a modularized manner, the modularized assembly is convenient to realize, the automatic assembly is convenient, and the module can be assembled for a plurality of times simply.
Specifically, the basic protection includes overload long-delay protection, short-circuit short-delay protection and short-circuit instantaneous protection; the electric energy quality monitoring comprises steady state characteristic indexes such as voltage effective values, current effective values, frequency, power, three-phase unbalance, harmonic waves and the like of each phase, and the corresponding requirements are shown in figure 7.
The control module 5 comprises a clock unit, and the data record comprises frozen data, statistical data and zero clearing, wherein the frozen data is as follows: the freezing function should include at least minute-scale freezing, day-freezing, and month-freezing.
Specifically, the minute scale freezes: the storage space of the circuit breaker is at least defaultly recorded with total and all split-phase forward active power, total and all split-phase reverse active power, split-phase voltage, split-phase current, total and all split-phase active power, total and all split-phase reactive power and total and all split-phase power factors, the minute freezing interval time can be set within the range of 1 min-60 min, and the data volume of not less than 20 days can be recorded under the condition that the interval time is 1 min; day freezing: storing the total power of the forward and reverse active power at zero point of each day, wherein the data can be stored for at least 62 days; and (5) freezing: the forward and reverse active total electric energy of the zero point of 1 day per month is stored, and 12 times of the storage can be circularly carried out.
The data recording requirements are: the statistical record at least comprises an accumulated record, a daily maximum and minimum value record and an event record; the total tripping times, the protection tripping times, the manual tripping times and the remote tripping times which are to be recorded are accumulated and recorded; the daily maximum and minimum value records should record the maximum and minimum values of each phase voltage, each phase current and occurrence time which occur at any time of the system under normal running conditions, and do not include transient voltages, for example, voltage values which occur due to switching operation and transient change of a switch of the system; an amount of data that should be storable for at least 30 days; the event record should support protection actions, protection function switching, gate change, protection alarm, power failure, self-diagnosis alarm, low-voltage breaker failure and online upgrade event record. The single event record at least comprises: the occurrence time, the occurrence reason, the occurrence phase and the occurrence time electric parameter of the event can circularly store the protection action event for at least 20 times and other events for at least 10 times; the log file at least comprises information such as equipment restarting, software upgrading operation and the like, and is suitable for supporting information such as software function abnormality and the like, and the generated log is suitable for supporting an export function.
The zero clearing function requirement is as follows:
and (3) data clearing: the breaker should support clearing stored freeze data, accumulated records, daily maximum and minimum records, event records; the zero clearing operation is used as an event permanent record, and security measures for preventing unauthorized operation are required;
event clearing: the breaker should support clearing the stored event record, can support the clearing of the sub-event; the zeroing operation is permanently recorded as an event, and security measures should be taken to prevent unauthorized operation.
The state monitoring requirement of the circuit breaker is as follows: the circuit breaker supports a switch position state monitoring function, including a brake opening state monitoring function and a brake closing state monitoring function; the circuit breaker supports an operation state monitoring function, including protection action, protection alarm, self-diagnosis alarm, remote and manual action state monitoring, and the operation state can be actively reported according to an active reporting mode word of the circuit breaker; the circuit breaker supports temperature of the controller and voltage data monitoring of the clock battery; the circuit breaker supports each phase of terminal or contact temperature monitoring.
The circuit breaker adopts a lightweight operating system to support basic functions such as process/thread management, memory management, inter-thread communication, thread synchronization, time management, equipment management and the like; support POSIX standard interface form; and supporting the system security functions such as kernel application separation, system resource access control and the like.
The control module 5 comprises a topology identification unit, adopts a hardware topology method, specifically, the server transmits a characteristic signal transmitting instruction to the circuit breaker, and the circuit breaker controls the on-off of a load to generate a characteristic signal on a power line after receiving the instruction.
In this embodiment, the signal characteristic frequency is 833.3 Hz, the duty ratio of the transmission signal is 1/3, the initiator is aah=10101010b, and the control code is e9h=11101001B, where there is no characteristic transmission when the code bit is 0, and there is a characteristic transmission when the code bit is 1.
The transmission time of each bit of code defaults to 600 ms +/-15 ms, and if the load is a constant-resistance load, specific time sequence wave diagrams in the signal transmission process are shown in fig. 8 and 9; if the load is a constant current load, specific timing waveform diagrams in the signal transmission process are shown in fig. 10 and 11.
For constant resistance loads, the characteristic signal peaks range between 0.5A and 0.65A. For constant current loads, the peak value range of the characteristic signal is between 0.38 and A and 0.45 and A, and the circuit breaker can store at least 10 pieces of transmission characteristic information, including characteristic signal transmission time and the phase.
The circuit breaker receives the command of sending the feature code, the feature code sending interval time is not less than 3 min, and the command is received again to reply the negative acknowledgement within the period of less than 3 min.
The circuit breaker collects signals on the power line in real time, and analyzes and identifies characteristic signals; the circuit breaker samples the signal, the frequency is not lower than 6.4 kHz, ADC precision is not lower than 22 bits, the characteristic signal sent by the subordinate equipment is identified, when the signal is received, the information such as the clock of the circuit breaker, the receiving phase, the signal intensity and the like is stored as a record for the server to read, and the characteristic signal specified in the signal sending figure 8 can be identified; the breaker should be able to store at least 200 pieces of identification information, including information of characteristic signal identification time, belonging phase, signal strength, etc., wherein the signal strength is not more than 1A.
The foregoing disclosure is illustrative of the present application and is not to be construed as limiting the scope of the application, which is defined by the appended claims.
Claims (8)
1. The intelligent circuit breaker comprises three main switch loops (1) and an operating mechanism (2) in linkage fit with the main switch loops (1), and is characterized by further comprising a first circuit board (3), a second circuit board (4), a control module (5), a multimode communication module (6), a release (7), a relay and a switching power supply, wherein the control module (5) comprises a liquid crystal display screen, the main switch loops (1) comprise a front-end wiring board (101), a flexible wire (102), a rotating shaft (103), an arc extinguishing chamber (104) and a rear-end wiring board (105), the arc extinguishing chamber (104) comprises a breaking channel (106), one end of the front-end wiring board (101) extends into the breaking channel (106) and is provided with a fixed contact, and one end of the rotating shaft (103) extends into the breaking channel (106) and is provided with a moving contact;
the first circuit board (3) is arranged below the front-end wiring board (101), a front-end temperature signal acquisition structure (8) and a front-end electric energy signal acquisition structure (9) are arranged on the first circuit board (3) corresponding to each front-end wiring board (101), an integrated current transformer (10) is arranged on one side, close to the rear-end wiring board (105), of the first circuit board (3), the flexible wires (102) penetrate through the integrated current transformer (10) and are respectively connected with the rotating shaft (103) and the rear-end wiring board (105) at two ends, the second circuit board (4) is arranged above the integrated current transformer (10) and is connected with the rear-end wiring board (105) in an inserting mode, the control module (5) comprises an independent shell, the independent shell is arranged above the second circuit board (4) and is connected with the front-end electric energy signal acquisition structure (12) corresponding to each rear-end wiring board (105), and the multimode communication module (6) is connected with the control module (5) in an inserting mode, and the second circuit board (4) is positioned above the rear-end wiring board (105);
the rotary shaft (103) is arranged above the first circuit board (3), two micro switches (13) which are in linkage fit with the rotary shaft (103) are arranged on the first circuit board (3), three piezoresistors (14) are arranged on the first circuit board (3) side by side with the micro switches (13), the release (7) is assembled with the operating mechanism (2) and is connected to the second circuit board (4) in a switching mode, a neutral line interface (15) is arranged on the second circuit board (4), and a signal switching structure (16) is arranged between the first circuit board (3) and the second circuit board (4).
2. The intelligent circuit breaker according to claim 1, further comprising a housing (19), wherein the housing (19) is provided with independent chambers for respectively mounting the first circuit board (3), the second circuit board (4) and the control module (5) for isolation from the main switching circuit (1).
3. The intelligent circuit breaker according to claim 2, wherein a transfer cover shell (17) is arranged in the shell, the second circuit board (4) is arranged in the transfer cover shell (17), the rear end temperature signal acquisition structure (11) comprises a rear end temperature acquisition element (111), the tail end of the rear end temperature acquisition element (111) is abutted to the rear end circuit board (105), the transfer cover shell (17) is provided with an isolation cylinder (171) corresponding to the rear end temperature acquisition element (111), and the isolation cylinder (171) wraps the rear end temperature acquisition element (111).
4. The intelligent circuit breaker according to claim 1, wherein the rear-end electric energy collection signal structure (12) comprises a pin strip (121), one end of the pin strip (121) is respectively connected with three rear-end wiring boards (105), and the other end of the pin strip is plugged with the second wiring board (4).
5. The intelligent circuit breaker according to claim 1, wherein the front-end temperature signal collection structure (8) comprises a front-end temperature collection element (81) and an insulating cover (18), the insulating cover (18) is used for isolating the front-end temperature collection element (81) from the front-end electric energy signal collection structure (9), the tail end of the front-end temperature collection element (81) is abutted to the front-end wiring board (101), and the insulating cover (18) wraps the front-end temperature collection element (81).
6. The intelligent circuit breaker according to claim 1, wherein the arc extinguishing chamber (104) comprises a plurality of arc extinguishing bars (107), and one side of the arc extinguishing bars (107) close to the front end wiring board (101) is inclined upwards.
7. A control method applied to the intelligent circuit breaker as claimed in any one of claims 1 to 6, comprising the steps of:
step 1: the switching power supply is powered by a front-end wiring board (101) to be connected into each module;
step 2: the front-end temperature signal acquisition structure (8) and the front-end electric energy signal acquisition structure (9) acquire current, voltage and temperature signals of the front end of the circuit breaker to the first circuit board (3), and the first circuit board (3) transfers the signals to the second circuit board (4);
step 3: the rear-end temperature signal acquisition structure (11) and the rear-end electric energy acquisition signal structure (12) acquire current, voltage and temperature signals of the rear end of the circuit breaker to the second circuit board (4);
step 4: the integrated current transformer (10) collects current and voltage signals of the main switch loop (1) to the second circuit board (4);
step 5: the second circuit board (4) transfers all collected signals to the control module (5), the control module (5) monitors, and when various abnormal states occur, the control module (5) controls the main switch loop (1) to trip.
8. The control method according to claim 7, characterized in that the multimode communication module (6) uploads the signal to a server and can remotely control the circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310852127.5A CN116682705A (en) | 2023-07-11 | 2023-07-11 | Intelligent circuit breaker and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310852127.5A CN116682705A (en) | 2023-07-11 | 2023-07-11 | Intelligent circuit breaker and control method thereof |
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| Publication Number | Publication Date |
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| CN116682705A true CN116682705A (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310852127.5A Pending CN116682705A (en) | 2023-07-11 | 2023-07-11 | Intelligent circuit breaker and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118645405A (en) * | 2024-06-24 | 2024-09-13 | 广州市美硕生富能源科技有限公司 | Circuit breaker |
-
2023
- 2023-07-11 CN CN202310852127.5A patent/CN116682705A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118645405A (en) * | 2024-06-24 | 2024-09-13 | 广州市美硕生富能源科技有限公司 | Circuit breaker |
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