CN111342427B - Topology identification method of circuit breaker and circuit breaker - Google Patents
Topology identification method of circuit breaker and circuit breaker Download PDFInfo
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- CN111342427B CN111342427B CN202010133591.5A CN202010133591A CN111342427B CN 111342427 B CN111342427 B CN 111342427B CN 202010133591 A CN202010133591 A CN 202010133591A CN 111342427 B CN111342427 B CN 111342427B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/005—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for remote controlled apparatus; for lines connecting such apparatus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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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
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/14—Protecting elements, 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
- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
Abstract
The application provides a topology identification method of a circuit breaker and the circuit breaker, and relates to the technical field of low-voltage electrical appliances. Wherein the method can be applied to a controller of a circuit breaker, the circuit breaker comprising: the device comprises a controller, a sampling unit and a mutual inductor, wherein the controller is connected with the sampling unit, a primary side of the mutual inductor is connected with a power line, and a secondary side of the mutual inductor is connected with the sampling unit, and the method comprises the following steps: reading a current signal induced by the secondary side of the mutual inductor through a sampling unit; acquiring a signal waveform according to the current signal; the signal waveform is matched with the preset topological characteristic signal waveform to obtain a topological matching result, so that the random preset topological characteristic signal waveform can be detected, a special topological identification module is prevented from being configured in the breaker, the internal space of the breaker is saved, the manufacturability of the breaker can be improved to a certain extent, and the manufacturing cost is reduced.
Description
Technical Field
The application relates to the technical field of low-voltage electrical appliances, in particular to a topology identification method of a circuit breaker and the circuit breaker.
Background
The ubiquitous power internet of things surrounds each link of a power system, modern information technologies such as mobile interconnection, artificial intelligence and the like and advanced communication technologies are fully applied, all things interconnection and man-machine interaction in each link of the power system are achieved, and the intelligent service system has the characteristics of comprehensive state sensing, efficient information processing and convenient and flexible application.
With the ubiquitous power internet of things of national grid construction, the distribution equipment is required to have a topology identification function.
The circuit breaker is an important protection electrical apparatus in the low-voltage distribution network, generally does not have the topology recognition function, and if the topology recognition function is to be realized, then the circuit breaker is required to be internally provided with a special topology recognition module, so that the circuit breaker can occupy the internal space of the circuit breaker, the manufacturability of the circuit breaker is poor, and the cost is increased.
Disclosure of Invention
The purpose of the present application is to provide a topology identification method for a circuit breaker and a circuit breaker, aiming at the defects in the prior art, which can solve the technical problems that the manufacturability of the circuit breaker is poor and the cost is increased due to the fact that a special topology identification module needs to be configured inside the circuit breaker in the prior art.
In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:
in a first aspect, an embodiment of the present application provides a topology identification method for a circuit breaker, which is applied to a controller of the circuit breaker, where the circuit breaker includes: the device comprises a controller, a sampling unit and a mutual inductor, wherein the controller is connected with the sampling unit, a primary side of the mutual inductor is connected with a power line, and a secondary side of the mutual inductor is connected with the sampling unit, and the method comprises the following steps: reading a current signal induced by the secondary side of the mutual inductor through the sampling unit; acquiring a signal waveform according to the current signal; and matching the signal waveform with a preset topological characteristic signal waveform to obtain a topological matching result.
Optionally, the circuit breaker further comprises: a communication unit to which the controller is connected; after the signal waveform is matched with the preset topological characteristic signal waveform and a topological matching result is obtained, the method further comprises the following steps: and sending a topology identification instruction to an upper computer through the communication unit, wherein the topology identification instruction carries the topology matching result.
Optionally, the communication unit includes a power carrier communication module and/or an RS485 communication module.
Optionally, the matching the signal waveform with the preset topological characteristic signal waveform to obtain a topological matching result includes: matching the signal waveform with the characteristics of a preset topological characteristic signal waveform to obtain a topological matching result, wherein the characteristics comprise at least one of the following items: amplitude, pulse width, frequency, number of waveforms.
Optionally, the obtaining a signal waveform according to the current signal includes: filtering fundamental waves in the current signals to obtain filtered current signals; and acquiring a signal waveform according to the filtered current signal.
In a second aspect, an embodiment of the present application provides a circuit breaker, including: the circuit breaker comprises a circuit breaker body, a mutual inductor, a controller and a sampling unit;
the controller, the mutual inductor and the sampling unit are all arranged in the circuit breaker body, the controller is connected with the sampling unit, the primary side of the mutual inductor is connected with a power line, and the secondary side of the mutual inductor is connected with the sampling unit;
the sampling unit is used for reading a current signal induced by the secondary side of the mutual inductor;
the controller is used for acquiring a signal waveform according to the current signal; and matching the signal waveform with a preset topological characteristic signal waveform to obtain a topological matching result.
Optionally, the circuit breaker further comprises: a communication unit to which the controller is connected;
and the communication unit is used for sending a topology identification instruction to the upper computer, and the topology identification instruction carries the topology matching result.
Optionally, the communication unit includes a power carrier communication module and/or an RS485 communication module.
Optionally, the controller is specifically configured to match the signal waveform with a feature of a preset topological characteristic signal waveform to obtain a topological matching result, where the feature includes at least one of the following: amplitude, pulse width, frequency, number of waveforms.
Optionally, the controller is specifically configured to filter a fundamental wave in the current signal, and obtain a filtered current signal; and acquiring a signal waveform according to the filtered current signal.
The beneficial effect of this application is:
the topology identification method of the circuit breaker and the circuit breaker provided by the embodiment of the application can be applied to a controller of the circuit breaker, and the circuit breaker comprises the following steps: the device comprises a controller, a sampling unit and a mutual inductor, wherein the controller is connected with the sampling unit, a primary side of the mutual inductor is connected with a power line, and a secondary side of the mutual inductor is connected with the sampling unit, and the method comprises the following steps: reading a current signal induced by the secondary side of the mutual inductor through a sampling unit; acquiring a signal waveform according to the current signal; the signal waveform is matched with the preset topological characteristic signal waveform to obtain a topological matching result, so that the random preset topological characteristic signal waveform can be detected, a special topological identification module is prevented from being configured in the breaker, the internal space of the breaker is saved, the manufacturability of the breaker can be improved to a certain extent, and the manufacturing cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic flowchart of a topology identification method for a circuit breaker according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart of another topology identification method for a circuit breaker according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of a topology identification method for a circuit breaker according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a circuit breaker according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another circuit breaker according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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 some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Fig. 1 is a schematic flowchart of a topology identification method for a circuit breaker according to an embodiment of the present application, where the method is applicable to a controller of the circuit breaker, and the circuit breaker includes: the method comprises the following steps that a controller, a sampling unit and a mutual inductor are connected, wherein the controller is connected with the sampling unit, a primary side of the mutual inductor is connected with a power line, and a secondary side of the mutual inductor is connected with the sampling unit, as shown in figure 1, the method comprises the following steps:
and S101, reading a current signal induced by the secondary side of the transformer through a sampling unit.
The mutual inductor can be a current mutual inductor, a primary side of the current mutual inductor can be connected with a power line, a secondary side of the current mutual inductor can be connected with the sampling unit, signals on the power line pass through the mutual inductor, current signals can be induced on the secondary side of the mutual inductor, and then the sampling unit can read the current signals induced on the secondary side of the mutual inductor. Optionally, the sampling unit may be implemented based on an operational amplifier, for example, a current signal induced by a secondary side of the transformer may flow through a sampling element (e.g., a resistor) to form a differential voltage signal, and then the differential voltage signal may be output to the controller through the operational amplifier.
And S102, acquiring a signal waveform according to the current signal.
Optionally, after the current signal is obtained, a corresponding signal waveform can be obtained according to the obtained current signal in a fitting manner, and the change condition of the secondary side current signal of the transformer can be reflected through the signal waveform.
S103, matching the signal waveform with a preset topological characteristic signal waveform to obtain a topological matching result.
The preset topological characteristic signal waveform is an identification waveform for topological networking, can be sent to the circuit breaker through an external special topological sending module, and can also be generated through the circuit breaker, and the application is not limited herein. After the signal waveform is obtained, the signal waveform can be matched with a preset topological characteristic signal waveform to obtain a topological matching result, and the topological matching result can reflect a topological identification result of the circuit breaker.
The topology identification result can display whether the waveform is matched with the preset topology characteristic signal.
To sum up, the topology identification method for a circuit breaker provided by the embodiment of the present application may be applied to a controller of the circuit breaker, where the circuit breaker includes: the device comprises a controller, a sampling unit and a mutual inductor, wherein the controller is connected with the sampling unit, a primary side of the mutual inductor is connected with a power line, and a secondary side of the mutual inductor is connected with the sampling unit, and the method comprises the following steps: reading a current signal induced by the secondary side of the mutual inductor through a sampling unit; acquiring a signal waveform according to the current signal; the signal waveform is matched with the preset topological characteristic signal waveform to obtain a topological matching result, so that the random preset topological characteristic signal waveform can be detected, a special topological identification module is prevented from being configured in the breaker, the internal space of the breaker is saved, the manufacturability of the breaker can be improved to a certain extent, and the manufacturing cost is reduced.
Fig. 2 is a schematic flowchart of another topology identification method for a circuit breaker according to an embodiment of the present application. Optionally, the circuit breaker further comprises: the communication unit is connected with the controller; as shown in fig. 2, after the matching of the signal waveform with the preset topological characteristic signal waveform and the obtaining of the topological matching result, the method further includes:
s201, sending a topology identification instruction to an upper computer through a communication unit, wherein the topology identification instruction carries a topology matching result.
Optionally, when the circuit breaker includes the communication unit, the controller can also send the topology identification instruction carrying the topology matching result to the host computer through the communication unit, and then the host computer is after receiving this topology identification instruction, and data platform (for example, platform server) will know the position of every circuit breaker in the electric wire netting to and the network structure of whole circuit breaker, and then can draw the hierarchical relation of circuit breaker in the electric wire netting system, carry out the network deployment of electric wire netting topology. In addition, through communication unit's setting, can realize the remote communication between circuit breaker and the host computer, further improve the intelligent degree of circuit breaker.
It should be noted that the communication unit may also be directly connected to the upper computer, that is, the circuit breaker and the upper computer may share one communication unit, and of course, according to an actual application scenario, the circuit breaker and the upper computer may be respectively provided with respective communication units, and according to the communication unit of the circuit breaker, the upper computer may additionally be provided with a communication unit matched with the communication unit of the circuit breaker, which is not limited herein.
Optionally, the communication unit includes a power carrier communication module and/or an RS485 communication module.
The communication unit may select the power line carrier communication module and/or the RS485 communication module to communicate according to an actual application scenario, which is not limited herein, and of course, other communication units, such as an RS232 communication module, may also be included.
Optionally, the matching the signal waveform with the preset topological characteristic signal waveform to obtain a topological matching result includes: matching the signal waveform with the characteristics of a preset topological characteristic signal waveform to obtain a topological matching result, wherein the characteristics comprise at least one of the following items: amplitude, pulse width, frequency, number of waveforms.
Optionally, when matching is performed, the characteristics of the signal waveform may be matched with the characteristics of the preset topology signal waveform, and a corresponding topology matching result may be obtained through matching. It should be noted that, in the matching, one or more features may be matched, and the present application is not limited herein. For example, the frequency of the signal waveform and the frequency of the preset topological characteristic signal waveform can be matched, so as to obtain a topological matching result; or, the amplitude, the pulse width, the frequency and the number of the waveforms of the signal waveform and the preset topological characteristic signal waveform can be respectively matched, so as to obtain a topological matching result.
Fig. 3 is a schematic flowchart of another topology identification method for a circuit breaker according to an embodiment of the present application. Optionally, as shown in fig. 3, the obtaining the signal waveform according to the current signal includes:
s301, filtering the fundamental wave in the signal to obtain a filtered current signal.
And S302, acquiring a signal waveform according to the filtered current signal.
Alternatively, the fundamental wave may be a signal satisfying a preset frequency, and the preset frequency may be 50Hz, but is not limited thereto, and may also be other preset frequencies according to the actual application scenario. Wherein, through filtering, can filter the interference of fundamental wave to signal waveform, and then match signal waveform with predetermineeing topological characteristic signal waveform, can obtain comparatively accurate topology matching result, improve the accuracy of topology identification.
Fig. 4 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application, the basic principle and the technical effect of the circuit breaker are the same as those of the corresponding method embodiment, and for brief description, the corresponding contents in the method embodiment may be referred to for the parts not mentioned in this embodiment. As shown in fig. 4, the circuit breaker 100 includes: the circuit breaker comprises a circuit breaker body 110, a mutual inductor 120, a controller 130 and a sampling unit 140;
the mutual inductor 120, the controller 130 and the sampling unit 140 are all arranged in the circuit breaker body 110, the controller 130 is connected with the sampling unit 140, the primary side of the mutual inductor 120 is connected with a power line (not shown in the figure), and the secondary side of the mutual inductor 120 is connected with the sampling unit 140;
a sampling unit 140, configured to read a current signal induced at a secondary side of the transformer 120;
a controller 130 for acquiring a signal waveform according to the current signal; and matching the signal waveform with a preset topological characteristic signal waveform to obtain a topological matching result.
Fig. 5 is a schematic structural diagram of another circuit breaker according to an embodiment of the present application. Optionally, as shown in fig. 5, the circuit breaker 100 further includes: a communication unit 150, the controller 130 being connected to the communication unit 150; and the communication unit 150 is used for sending a topology identification instruction to the upper computer 200, wherein the topology identification instruction carries a topology matching result.
Optionally, the communication unit 150 includes a power carrier communication module and/or an RS485 communication module.
Optionally, the controller 130 is specifically configured to match the signal waveform with a feature of a preset topological characteristic signal waveform to obtain a topological matching result, where the feature includes at least one of the following: amplitude, pulse width, frequency, number of waveforms.
Optionally, the controller 130 is specifically configured to filter a fundamental wave in the current signal to obtain a filtered current signal; and acquiring a signal waveform according to the filtered current signal.
The above-mentioned apparatus is used for executing the method provided by the foregoing embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
These above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Optionally, the present application further provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the computer program performs the steps of the above method embodiments. The specific implementation and technical effects are similar, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
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. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. 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 (8)
1. A topology identification method of a circuit breaker is characterized by being applied to a controller of the circuit breaker, wherein the circuit breaker comprises the following steps: the circuit breaker comprises a controller, a sampling unit and a mutual inductor, wherein the controller is connected with the sampling unit, a primary side of the mutual inductor is connected with a power line, a secondary side of the mutual inductor is connected with the sampling unit, and the controller, the mutual inductor and the sampling unit are all arranged in a circuit breaker body, and the method comprises the following steps:
reading a current signal induced by the secondary side of the mutual inductor through the sampling unit;
acquiring a signal waveform according to the current signal;
matching the signal waveform with a preset topological characteristic signal waveform to obtain a topological matching result;
wherein, the matching the signal waveform with the preset topological characteristic signal waveform to obtain the topological matching result comprises: matching the signal waveform with the characteristics of a preset topological characteristic signal waveform to obtain a topological matching result, wherein the characteristics comprise at least one of the following items: amplitude, pulse width, frequency, number of waveforms.
2. The method of claim 1, wherein the circuit breaker further comprises: a communication unit to which the controller is connected;
after the signal waveform is matched with the preset topological characteristic signal waveform and a topological matching result is obtained, the method further comprises the following steps:
and sending a topology identification instruction to an upper computer through the communication unit, wherein the topology identification instruction carries the topology matching result.
3. The method of claim 2, wherein the communication unit comprises a power carrier communication module and/or an RS485 communication module.
4. The method of claim 1, wherein said deriving a signal waveform from said current signal comprises:
filtering fundamental waves in the current signals to obtain filtered current signals;
and acquiring a signal waveform according to the filtered current signal.
5. A circuit breaker, comprising: the circuit breaker comprises a circuit breaker body, a mutual inductor, a controller and a sampling unit;
the controller, the mutual inductor and the sampling unit are all arranged in the circuit breaker body, the controller is connected with the sampling unit, the primary side of the mutual inductor is connected with a power line, and the secondary side of the mutual inductor is connected with the sampling unit;
the sampling unit is used for reading a current signal induced by the secondary side of the mutual inductor;
the controller is used for acquiring a signal waveform according to the current signal; matching the signal waveform with a preset topological characteristic signal waveform to obtain a topological matching result;
the controller is specifically configured to match the signal waveform with a feature of a preset topological characteristic signal waveform to obtain a topological matching result, where the feature includes at least one of the following: amplitude, pulse width, frequency, number of waveforms.
6. The circuit breaker of claim 5, further comprising: a communication unit to which the controller is connected;
and the communication unit is used for sending a topology identification instruction to an upper computer, and the topology identification instruction carries the topology matching result.
7. The circuit breaker of claim 6, wherein the communication unit comprises a power carrier communication module and/or an RS485 communication module.
8. The circuit breaker of claim 5, wherein the controller is specifically configured to filter a fundamental wave in the current signal to obtain a filtered current signal;
and acquiring a signal waveform according to the filtered current signal.
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| CN114552584A (en) * | 2022-01-14 | 2022-05-27 | 珠海多创科技有限公司 | Low-voltage power grid distribution area topology identification system and identification method |
| CN116165427B (en) * | 2023-02-17 | 2023-08-11 | 山东国信电力科技有限公司 | Power distribution low-voltage transformer area topology signal identification circuit and identification method |
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