CN112583123A - Intelligent molded case circuit breaker - Google Patents
Intelligent molded case circuit breaker Download PDFInfo
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- CN112583123A CN112583123A CN202011477444.6A CN202011477444A CN112583123A CN 112583123 A CN112583123 A CN 112583123A CN 202011477444 A CN202011477444 A CN 202011477444A CN 112583123 A CN112583123 A CN 112583123A
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- circuit breaker
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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
- H02J13/00032—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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The application provides an intelligence moulded case circuit breaker, this circuit breaker includes: a pulse current communication unit for generating a pulse current signal; the metering unit is in communication connection with the ammeter and is used for sending a pulse current signal to the ammeter and receiving a feedback signal of the ammeter; and the central processing unit is in communication connection with the pulse current communication unit and the metering unit and is used for sending pulse current signals and determining power utilization data and working state data according to the feedback signals. In this circuit breaker, impulse current communication unit generates impulse current signal, impulse current signal sends to the ammeter through central processing unit and metering unit, then receives the feedback signal of above-mentioned ammeter and sends to central processing unit, and central processing unit confirms power consumption data and operating condition data according to above-mentioned feedback signal, need not external equipment, can realize power consumption data acquisition and equipment operating condition's monitoring function, has solved the running state of monitoring platform district among the prior art and has required external equipment's problem.
Description
Technical Field
The application relates to the technical field of power distribution network monitoring, in particular to an intelligent molded case circuit breaker.
Background
The circuit breaker is a switching device capable of closing, bearing and opening a current under a normal circuit condition and closing, and bearing and opening a current under an abnormal circuit condition within a specified time, wherein a molded case circuit breaker is capable of automatically cutting off the current after the current exceeds a trip setting, a molded case is a case using a plastic insulator as a device for isolating between conductors and a grounding metal part, and an auxiliary contact, an undervoltage release, a shunt release and the like of the molded case circuit breaker are mostly modularized. The molded case circuit breaker is widely applied to power control of low-voltage transformer areas and various mechanical equipment and control and protection of electric terminals, and is a switching apparatus capable of conducting connection and disconnection operations on normal load current, overload current and short-circuit current.
In order to improve lean management level of metering and collecting services, improve high-quality service level of customers and improve data asset utilization value, power companies gradually find that the power line topology of a low-voltage distribution area only realizes a logic topology function, only master a central node and a user node of a power network, and have unclear connection relation among the nodes. Due to the characteristics of plug and play, the network physical topology is extremely disordered; when the low-voltage transformer area is failed and abnormal energy is consumed due to the lack of the grading monitoring function, a fault point cannot be accurately positioned, the rush-repair progress is influenced, and inconvenience is brought to users.
The current plastic case circuit breaker operating mechanism is operated in a simulation mode, and does not have the physical topology recognition function and the communication function of a low-voltage transformer area power network or adopt RS485 and Modbus-RTU protocols.
The traditional molded case circuit breaker does not have the functions of physical topology identification of a low-voltage transformer area power network, metering, HPLC communication and pulse current communication. The system can not provide physical topological data of a power network in a low-voltage distribution area, has no functions of metering box management, electricity stealing early warning, power failure event reporting, line loss analysis and study, terminal temperature detection, automatic fault diagnosis and the like, and can not perform data measurement and data recording on related circuits of the molded case circuit breaker. If the functions and the functions of data measurement and data recording of related circuits are realized, excessive equipment needs to be connected externally, so that the cost is too high, the size is too large, and the installation is inconvenient.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The main aim of this application provides an intelligence moulded case circuit breaker to the running state who monitors the platform district among the solution prior art needs external equipment's problem.
According to an aspect of an embodiment of the present invention, there is provided an intelligent molded case circuit breaker including: a pulse current communication unit for generating a pulse current signal; the metering unit is in communication connection with an electric meter and is used for sending the pulse current signal to the electric meter and receiving a feedback signal of the electric meter; and the central processing unit is in communication connection with the pulse current communication unit and the metering unit and is used for sending the pulse current signal and determining power utilization data and working state data according to the feedback signal.
Optionally, the intelligent molded case circuit breaker further comprises: and the HPLC communication unit is in communication connection with the concentrator and the central processing unit and is used for receiving the instruction signal of the concentrator and sending the instruction signal to the pulse current communication unit.
Optionally, the intelligent molded case circuit breaker further comprises: the RS-485 communication unit is in communication connection with the central processing unit and is used for receiving the power utilization data and the working state data; and the memory is in communication connection with the RS-485 communication unit and is used for storing the electricity utilization data and the working state data.
Optionally, the operating state data includes voltage, current, electrical quantity, active power, and power factor.
Optionally, the HPLC communication unit is further configured to upload the power usage data and the operating status data to the concentrator.
Optionally, the central processor unit is further configured to determine an equipment fault according to the operating state data.
Optionally, the sampling frequency of the metering unit is 1-10 Hz.
In the embodiment of the invention, in the intelligent molded case circuit breaker, the pulse current communication unit generates a pulse current signal, the pulse current signal is sent to the ammeter through the central processing unit and the metering unit, then a feedback signal of the ammeter is received and sent to the central processing unit, the central processing unit determines the electricity consumption data and the working state data according to the feedback signal, and the functions of electricity consumption data acquisition and equipment working state monitoring can be realized without external equipment, so that the equipment volume and the cost of a power distribution network are reduced, and the problem that the external equipment is needed for monitoring the running state of a station area in the prior art is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 shows a schematic diagram of a smart molded case circuit breaker according to an embodiment of the present application;
fig. 2 shows a schematic diagram of a power distribution network of a low-voltage area according to the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As mentioned in the background, in the prior art, the monitoring of the operation state of the station area requires an external device, and in order to solve the above problems, in an exemplary embodiment of the present application, an intelligent molded case circuit breaker is provided.
According to an embodiment of the present application, there is provided an intelligent molded case circuit breaker.
Fig. 1 is a schematic view of a smart molded case circuit breaker according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:
a pulse current communication unit for generating a pulse current signal;
the metering unit is in communication connection with an ammeter and is used for sending the pulse current signal to the ammeter and receiving a feedback signal of the ammeter;
and the central processing unit is in communication connection with the pulse current communication unit and the metering unit and is used for sending the pulse current signal and determining power utilization data and working state data according to the feedback signal.
Among the above-mentioned intelligence moulded case circuit breaker, impulse current communication unit generates impulse current signal, impulse current signal sends to the ammeter through central processing unit and measurement unit, then receive the feedback signal of above-mentioned ammeter and send to central processing unit, central processing unit confirms power consumption data and operating condition data according to above-mentioned feedback signal, need not external equipment, can realize power consumption data acquisition and equipment operating condition's monitoring function, distribution network equipment volume and cost have been reduced, the problem that the running state of monitoring platform district needs external equipment among the prior art has been solved.
It should be noted that, the central processing unit adopts GD32F405RGT6 chip, the chip adopts Cortex-M4 ARM core, the dominant frequency is up to 168mhz, the chip has 144 pins in total, the volume is small, the operation and interface resources are abundant, including 4 USARTs, 2 UARTs, 3 SPIs, 3 fast I2C, 2I 2S,1 SDIO, 1 fast ethernet Media Access Controller (MAC) 10/100M, etc., and can provide multiple transmission modes such as Device, HOST, OTG, etc. The external debugging interface is connected with the external connector of the product, and the functions of upgrading and debugging the program of the molded case circuit breaker can be realized. The central processing unit adopts a multi-parameter characteristic extraction algorithm based on frequency domain slice wavelet transformation to process the pulse current signal in one step so as to ensure that the address of the electric meter is correctly received.
In an embodiment of the present application, as shown in fig. 1, the intelligent molded case circuit breaker further includes an HPLC communication unit, the HPLC communication unit is in communication connection with a concentrator and the central processing unit, and the HPLC communication unit is configured to receive a command signal from the concentrator and send the command signal to the pulse current communication unit. Specifically, the HPLC communication unit transmits the instruction signal of the concentrator to the pulsed current communication unit, and the pulsed current communication unit generates the pulsed current signal of the designated frequency and the designated amplitude according to the instruction. The central processing unit communicates with the HPLC communication unit through a UART serial port to realize the data receiving and transmitting function with the HPLC chip.
It should be noted that, as shown in fig. 2, the distribution network in the low-voltage distribution area includes a concentrator, a transformer, a circuit breaker and an electric meter, the transformer supplies power to the concentrator and the electric meter through three-phase four-line pairs, and the circuit breaker is disposed on the power supply line to ensure the safety of power consumption. The intelligent transformer also has a low-voltage transformer area physical topology identification function, firstly, user transformation relation identification is completed, and the transformer area identification function based on an HPLC communication unit is adopted; secondly, branch recognition is carried out, and a pulse current method is adopted. The HPLC communication unit and the carrier chip of the molded case circuit breaker can generate a pulse current signal with specified frequency and amplitude after receiving the instruction signal of the concentrator, and the existing product structure does not need to be changed or a hardware module does not need to be added; and finally, meter box identification is carried out, pulse current and a big data algorithm are combined, the coding and mapping processing is carried out on the address of the electric meter on the pulse current signal of the HPLC communication unit, the plastic case circuit breaker extracts the pulse current signal by adopting a multi-parameter characteristic extraction algorithm based on frequency domain slice wavelet transformation, the address of the electric meter is decoded, and the identification of the electric meter in the meter box is realized.
In an embodiment of the present application, as shown in fig. 1, the intelligent molded case circuit breaker further includes an RS-485 communication unit and a memory, wherein the RS-485 communication unit is in communication connection with the central processing unit, and the RS-485 communication unit is configured to receive the power consumption data and the operating state data; the memory is in communication connection with the RS-485 communication unit and is used for storing the electricity utilization data and the working state data. Specifically, the RS-485 communication unit receives the power consumption data and the operating state data of the central processing unit, and sends the power consumption data and the operating state data to the memory for storage.
When the power consumption data and the operating state data are stored, firstly, whether a storage area corresponding to data to be stored in a memory is full is judged, the data are stored in an available sector, otherwise, a part of the sector is erased for storage, for example, at an interval of 15 minutes, current state data are stored, half-year event record data can be stored, and a cyclic recording mode is adopted, and after half a year, the data are written from an initial position of the memory; the event records of any day can be uploaded according to the command, and the records with relevant sizes are erased after the state data are uploaded.
It should be further noted that the central processing unit is further configured to determine a time point when the operating state of the device changes, generate an event to be stored in the memory, and store the event in a cyclic recording manner. When the event happens, the event is written from the initial position of the memory after the memory is half a year or the memory space is full, and the event record of any day can be uploaded according to the command. For example, before recording an event, the metering unit initializes the metering IC, initializes the platform area device, collects working state data, changes the device state to start when the current is greater than zero and the current device state is off, records the event, changes the device state to start when the current is greater than a working current threshold and the current device state is on, records the event, changes the device state to end when the current is less than the working current threshold and the current device state is on, records the event, powers off the device, changes the device state to off, and records the event.
In an embodiment of the present application, the operating state data includes voltage, current, electric quantity, active power and power factor. Specifically, the working state of the platform area equipment can be comprehensively grasped by collecting the working state data, and of course, the working state data is also limited thereto, and a person skilled in the art can select the data as needed.
In an embodiment of the application, the HPLC communication unit is further configured to upload the power consumption data and the operating state data to the concentrator. Specifically, the working state data and the power utilization data of the transformer area are acquired regularly, so that the equipment of the transformer area is updated and maintained conveniently.
In an embodiment of the present application, the central processing unit is further configured to determine an equipment fault according to the working state data. Specifically, the central processing unit may perform analysis according to the operating state data to determine whether the power distribution network device is faulty, and may invoke an event stored in the memory to analyze and locate the fault.
In an embodiment of the present application, the sampling frequency of the metering unit is 1 to 10 Hz. Specifically, the metering unit collects metering data in turns, and those skilled in the art can select an appropriate sampling frequency according to actual conditions. For example, the sampling frequency of the metering unit is 2Hz, i.e. the period is 500 milliseconds.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
in the intelligent molded case circuit breaker, the pulse current communication unit generates a pulse current signal, the pulse current signal is sent to the ammeter through the central processing unit and the metering unit, then receives the feedback signal of the ammeter and sends the feedback signal to a central processing unit, the central processing unit determines the electricity consumption data and the working state data according to the feedback signal without external equipment, the functions of collecting the electricity data and monitoring the working state of the equipment can be realized, the volume and the cost of the power distribution network equipment are reduced, the problem that external equipment is needed for monitoring the running state of the transformer area in the prior art is solved, and the intelligent molded case circuit breaker can further realize the functions of HPLC communication, high-precision alternating current sampling, power supply relation topology identification, metering box management, electricity stealing early warning, power failure event reporting, line loss analysis and study, terminal temperature detection, automatic fault diagnosis and the like.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. An intelligent molded case circuit breaker, comprising:
a pulse current communication unit for generating a pulse current signal;
the metering unit is in communication connection with an electric meter and is used for sending the pulse current signal to the electric meter and receiving a feedback signal of the electric meter;
and the central processing unit is in communication connection with the pulse current communication unit and the metering unit and is used for sending the pulse current signal and determining power utilization data and working state data according to the feedback signal.
2. The circuit breaker of claim 1, wherein the intelligent molded case circuit breaker further comprises:
and the HPLC communication unit is in communication connection with the concentrator and the central processing unit and is used for receiving the instruction signal of the concentrator and sending the instruction signal to the pulse current communication unit.
3. The circuit breaker of claim 1, wherein the intelligent molded case circuit breaker further comprises:
the RS-485 communication unit is in communication connection with the central processing unit and is used for receiving the power utilization data and the working state data;
and the memory is in communication connection with the RS-485 communication unit and is used for storing the electricity utilization data and the working state data.
4. The circuit breaker of claim 1, wherein the operating condition data includes voltage, current, charge, active power, and power factor.
5. The circuit breaker of claim 2, wherein the HPLC communication unit is further configured to upload the power usage data and the operating condition data to the concentrator.
6. The circuit breaker of claim 1, wherein said central processor unit is further configured to determine an equipment fault based on said operating condition data.
7. The circuit breaker according to claim 1, wherein the sampling frequency of the metering unit is 1-10 HZ.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011477444.6A CN112583123A (en) | 2020-12-15 | 2020-12-15 | Intelligent molded case circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011477444.6A CN112583123A (en) | 2020-12-15 | 2020-12-15 | Intelligent molded case circuit breaker |
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| CN112583123A true CN112583123A (en) | 2021-03-30 |
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| CN202011477444.6A Pending CN112583123A (en) | 2020-12-15 | 2020-12-15 | Intelligent molded case circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113410104A (en) * | 2021-05-14 | 2021-09-17 | 国网河北省电力有限公司邯郸供电分公司 | Cloud wisdom breaker based on HPLC |
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| CN111352028A (en) * | 2020-04-14 | 2020-06-30 | 山东德源电力科技股份有限公司 | Molded case circuit breaker and line loss analysis method |
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| CN110311711A (en) * | 2019-06-10 | 2019-10-08 | 深圳市国电科技通信有限公司 | A kind of intelligent distribution transformer terminals based on HPLC communication channel and intelligent electric meter exchange method |
| CN111342425A (en) * | 2020-04-14 | 2020-06-26 | 山东德源电力科技股份有限公司 | Residual current operated circuit breaker and platform area network topology identification method |
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Application publication date: 20210330 |