CN113472070A - Switch control method, system and storage medium - Google Patents

Switch control method, system and storage medium Download PDF

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Publication number
CN113472070A
CN113472070A CN202110575545.5A CN202110575545A CN113472070A CN 113472070 A CN113472070 A CN 113472070A CN 202110575545 A CN202110575545 A CN 202110575545A CN 113472070 A CN113472070 A CN 113472070A
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China
Prior art keywords
information
threshold
characteristic
power utilization
control instruction
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CN202110575545.5A
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Chinese (zh)
Inventor
刘定忠
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Guangdong Fanfan Industrial Investment Co ltd
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Guangdong Fanfan Industrial Investment Co ltd
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Priority to CN202110575545.5A priority Critical patent/CN113472070A/en
Publication of CN113472070A publication Critical patent/CN113472070A/en
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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
    • H02J13/00001—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 the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
    • 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
    • H02J13/0004—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 involved in a protection system
    • 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
    • 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
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Human Computer Interaction (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The application relates to a switch control method, which is applied to a switch controller, wherein the switch controller is connected with an electric circuit and used for controlling the on or off of the electric circuit, and the method comprises the following steps: detecting a characteristic signal of the electric circuit; comparing the characteristic signal with a preset threshold value, and generating a first control instruction and/or characteristic information according to a comparison result; when the feature information is generated, the feature information is sent to the external equipment; and when the first control instruction is generated, controlling the electric loop to be disconnected according to the first control instruction. The application also relates to a switch controller, a system and a storage medium applying the method. The invention has high use reliability and high safety.

Description

Switch control method, system and storage medium
Technical Field
The present application relates to the field of switch control technologies, and in particular, to a method, a system, and a storage medium for controlling a switch.
Background
With the continuous development of switch control technology, relays are widely applied to various power utilization occasions.
In the conventional technology, a relay is connected between an input end and an output end of an electricity utilization loop, the relay is provided with a controller, the controller generates an opening instruction or a disconnection instruction, and the relay controls a contact of the relay to be connected or disconnected under the instruction of the opening instruction or the disconnection instruction so as to realize the connection or disconnection of the electricity utilization loop.
However, because the relay lacks the ability to monitor the phenomena of early warning, alarming, short circuit and the like, when the phenomena of early warning, alarming, power failure protection and the like occur in the power utilization circuit, the relay cannot perform protective disconnection aiming at the phenomena of early warning, alarming, short circuit and the like, so that the power failure of the power utilization circuit is caused untimely, and therefore, the reliability and the safety of the use of the relay are low.
Disclosure of Invention
In view of the above, it is desirable to provide a switch control method, system and storage medium with high reliability and safety.
The invention discloses a switch control method, which is applied to a switch controller, wherein the switch controller is connected with an electricity utilization loop and used for controlling the conduction or the disconnection of the electricity utilization loop, and the method comprises the following steps:
detecting a characteristic signal of the power utilization loop; wherein the characteristic signal comprises a voltage signal and/or a current signal in the power utilization circuit;
comparing the characteristic signal with a preset threshold value, and generating a first control instruction and/or characteristic information according to a comparison result; the characteristic information is used for representing the running state of the power utilization circuit;
when the feature information is generated, the feature information is sent to external equipment; the external equipment is used for displaying the running state of the power utilization circuit according to the characteristic information;
and when the first control instruction is generated, controlling the power utilization circuit to be disconnected according to the first control instruction.
In one embodiment, when the characteristic signal is a voltage signal, the preset threshold includes at least one of a first voltage threshold, a second voltage threshold and a third voltage threshold, the first voltage threshold is smaller than the second voltage threshold, the second voltage threshold is smaller than the third voltage threshold, and the characteristic information includes at least one of first information, second information and third information;
the steps of comparing the characteristic signal with a preset threshold value and generating a first control instruction and/or characteristic information according to the comparison result comprise:
when the voltage signal is greater than the first voltage threshold and less than the second voltage threshold, generating first information; the first information is used for representing that an early warning event occurs in the power utilization circuit;
when the voltage signal is greater than the second voltage threshold and smaller than the third voltage threshold, generating second information and the first control instruction; wherein the second information is used for representing that an alarm event occurs in the power utilization loop;
when the voltage signal is greater than the third voltage threshold, generating third information and the first control instruction; wherein the third information is used for representing that the electric circuit is short-circuited.
In one embodiment, when the characteristic signal is a current signal, the preset threshold includes at least one of a first current threshold, a second current threshold and a third current threshold, the first current threshold is smaller than the second current threshold, the second current threshold is smaller than the third current threshold, and the characteristic information includes at least one of first information, second information and third information;
the steps of comparing the characteristic signal with a preset threshold value and generating a first control instruction and/or characteristic information according to the comparison result comprise:
when the current signal is larger than the first current threshold and smaller than the second current threshold, generating first information; the first information is used for representing that an early warning event occurs in the power utilization circuit;
when the current signal is larger than the second current threshold and smaller than the third current threshold, generating second information and the first control instruction; wherein the second information is used for representing that an alarm event occurs in the power utilization loop;
when the current signal is larger than the third current threshold, generating third information and the first control instruction; wherein the third information is used for representing that the electric circuit is short-circuited.
In one embodiment, the feature information includes fourth information; the method further comprises the following steps:
detecting fault electric arcs according to the characteristic signals;
when the fault arc characteristic is detected, generating the fourth information and the first control instruction; wherein the fourth information is used to characterize a fault arc event occurring with the electrical circuit.
In one embodiment, the method further comprises:
receiving a second control instruction sent by the external equipment;
and controlling the power utilization loop according to the second control instruction.
In one embodiment, the method further comprises:
performing zero-crossing detection according to the characteristic signal to obtain a zero-crossing point of the power utilization circuit; wherein the zero-crossing points comprise voltage zero-crossing points and/or current zero-crossing points of the power utilization circuit;
acquiring a characteristic protection point according to the zero crossing point and a preset action time threshold;
when the first control instruction and/or the second control instruction are/is acquired, controlling the power utilization loop at the characteristic protection point according to the first control instruction or the second control instruction; wherein the second control instruction is received by the switch controller from the external device.
In one embodiment, the step of performing zero-crossing detection according to the characteristic signal to obtain a zero-crossing point of the power utilization circuit includes:
judging the current on-off state of the power utilization loop; wherein the on-off state comprises a power-off state and a conducting state;
when the circuit is in a power-off state, detecting a voltage zero crossing point according to the voltage signal; and/or the presence of a gas in the gas,
and when the circuit using loop is in a conducting state, detecting a current zero crossing point according to the current signal.
In one embodiment, the step of comparing the characteristic signal with a preset threshold value comprises:
receiving a threshold updating instruction sent by the external equipment;
and updating the current preset threshold according to the threshold updating instruction.
A switch control system comprises a switch controller and a relay, wherein the relay is connected between an input end and an output end of an electric circuit; the switch controller comprises an electrical detection module, a calculation module, a communication module and a control module, wherein the electrical detection module is connected with the calculation module, the calculation module is respectively connected with the communication module and the control module, the communication module is connected with the control module and is in communication connection with external equipment, and the control module is connected with the relay, wherein:
the electrical detection module is used for detecting a characteristic signal of the power utilization loop; wherein the characteristic signal is a voltage signal and/or a current signal in the power utilization loop;
the calculation module is used for comparing the characteristic signal with a preset threshold value and generating a first control instruction and/or characteristic information according to a comparison result; the characteristic information is used for representing the running state of the power utilization circuit;
the communication module is used for sending the characteristic information to external equipment when the characteristic information is generated; the external equipment is used for displaying the running state of the power utilization circuit according to the characteristic information;
and the control module is used for controlling the power utilization circuit to be disconnected according to the first control instruction when the first control instruction is generated.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned switch control method.
In the switch control method, the switch control system and the storage medium, before use, a user can preset a plurality of preset thresholds respectively associated with the events of early warning, alarming, power-off protection and the like of the power utilization circuit by detecting the characteristic signal, compare the characteristic signal with the preset thresholds and send characteristic information and/or a first control instruction to external equipment according to the comparison result; when the characteristic information is generated, the characteristic information is sent to the external equipment, so that conditions are provided for monitoring the running state of the power utilization loop on the external equipment by a user according to the characteristic information, a basis is provided for the user to remotely monitor and control the power utilization loop, and the operation convenience of the user on the switch controller is improved; when the first control instruction is generated, namely a power-off protection event occurs to the power utilization loop, the power utilization loop is controlled to be disconnected according to the first control instruction, so that the power utilization loop is effectively protected, and the use reliability and safety are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for controlling a switch according to an embodiment;
FIG. 2 is a schematic flow chart diagram illustrating one embodiment of step 104 of FIG. 1;
FIG. 3 is a schematic flow chart illustrating control steps based on fault arc monitoring in one embodiment;
FIG. 4 is a flow diagram illustrating control steps based on a second control command according to one embodiment;
FIG. 5 is a flowchart illustrating the updating step of the preset threshold according to an embodiment;
FIG. 6 is a schematic flow chart of the zero crossing point protection control step in one embodiment;
FIG. 7 is a schematic flow chart of the zero-crossing point detecting step in one embodiment;
FIG. 8 is a diagram illustrating an application scenario of a switch controller according to an embodiment;
FIG. 9 is a block diagram of a switch controller according to one embodiment;
fig. 10 is a schematic block diagram of a switch controller according to another embodiment.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
As shown in fig. 1 and 8, in one embodiment, the present invention provides a method for controlling a switch, which is applied to a switch controller 810.
The switch controller 810 is used for connecting with the power utilization circuit 820 to control the on/off of the power utilization circuit 820, a relay 830 (including but not limited to a magnetic latching relay) is arranged between the input end and the output end of the power utilization circuit 820, the switch controller 810 is connected with the relay 830, the switch controller 810 sends a control command to the relay 830, and the relay 830 performs the engagement action or the disengagement action of the contact points according to the control command.
The switch control method comprises the following steps:
in step 102, a characteristic signal of the electrical circuit 820 is detected.
In step 102, the characteristic signal includes a voltage signal and/or a current signal in the power utilization circuit 820, when the power utilization circuit 820 is in a power-off state, the power utilization circuit 820 has a voltage but no current, the voltage detection device is used, when the power utilization circuit 820 is in a power-on state, the power utilization circuit 820 has a voltage and a current, the voltage signal and/or the current signal are detected, and the specific detected signal can be specifically determined according to a preset threshold.
And 104, comparing the characteristic signal with a preset threshold value, and generating a first control instruction and/or characteristic information according to a comparison result.
In step 104, the specific number and value of the preset threshold may be specifically set according to the actual use condition, before the switch controller 810 is used, a user may analyze the voltage value and/or the current value of the power consumption circuit 820 in the current power consumption scenario according to the power consumption scenario in which the power consumption circuit 820 is located, and preset a plurality of preset thresholds respectively associated with the events of the power consumption circuit 820 such as the early warning, the alarm, and the power failure protection according to the analysis result, where the power failure protection time includes but is not limited to a short-circuit event and a fault arc event of the power consumption circuit 820; it is worth mentioning that, for example, in a common power utilization scenario (e.g., a household power utilization scenario), a user may specifically set different preset threshold values according to events such as early warning, alarming, power-off protection and the like that may occur in the power utilization loop 820 in the common power utilization scenario in advance, and for a factory power utilization scenario with a strict fire protection requirement, in order to better avoid occurrence of fire time due to an operation fault (e.g., a line short circuit burnout) of the power utilization loop 820, the preset threshold value may be adaptively adjusted to be lower than the preset threshold value in the common power utilization scenario.
In addition, the switch controller 810 may determine a power-off protection requirement of the power consumption circuit 820 according to a comparison result of the characteristic signal and the preset threshold, and when the power consumption circuit 820 needs to perform power-off protection under the condition of abnormal power consumption, the switch controller 810 generates a first control instruction for controlling the power-off of the power consumption circuit 820, where the first control instruction is substantially a disconnection instruction.
Step 106, when the feature information is generated, the feature information is sent to the external device 840.
In step 106, the characteristic information is used to characterize the operation state of the power consumption circuit 820, and the specific setting of the characteristic information is not limited, for example, in some embodiments, the characteristic information includes but is not limited to at least one of warning information (used to characterize that a warning event occurs on the power consumption circuit 820), and power failure protection information (used to characterize that a power failure protection event occurs on the power consumption circuit 820), and the power failure protection information includes but is not limited to short circuit warning information (used to characterize that a short circuit event occurs on the power consumption circuit 820) and fault arc warning information (used to characterize that a fault arc event occurs on the power consumption circuit 820).
Specifically, the switch controller 810 transmits the characteristic information to the external device 840 through a PLC (power line carrier communication) module, a communication line, or a wireless communication module, and the external device 840 is configured to display the operating state of the power consumption circuit 820 according to the characteristic information; the external device 840 includes, but is not limited to, a terminal device or a gateway device, for example, in some embodiments, the switch controller 810 is connected to the gateway device through a PLC module, uploads the characteristic information to the gateway device in a power line carrier communication manner, the gateway device uploads the characteristic information to the cloud server, and the characteristic information is sent to the terminal device by the cloud server, the terminal device (which includes, but is not limited to, at least one of a laptop, a tablet computer, and a mobile communication device) receives and displays the characteristic information, and a user can know an operation state of the power utilization circuit 820 according to the characteristic information; of course, in other embodiments, the switch controller 810 may also transmit the feature information directly to the terminal device through the wireless communication module.
In step 108, when the first control command is generated, the power utilization circuit 820 is controlled to be disconnected according to the first control command.
In step 108, if the power consumption circuit 820 generates a power failure protection requirement when power consumption abnormality occurs, the switch controller 810 controls the relay 830 to be turned off according to the first control instruction, and the power failure protection circuit 820 is powered off to protect the power consumption circuit 820.
In the above switch control method, the switch controller 810, the system and the storage medium, by detecting the characteristic signal, before use, a user may preset a plurality of preset thresholds respectively associated with the events of the power utilization circuit 820, such as early warning, alarming, power-off protection, and the like, compare the characteristic signal with the preset thresholds, and send characteristic information and/or a first control instruction to the external device 840 according to the comparison result; when the feature information is generated, the feature information is sent to the external device 840, so that a condition is provided for a user to monitor the running state of the power utilization circuit 820 on the external device 840 according to the feature information, a basis is provided for the user to remotely monitor and control the power utilization circuit 820, and the operation convenience of the user on the switch controller 810 is improved; when the first control instruction is generated, that is, when the power-off protection event occurs to the power utilization circuit 820, the power utilization circuit 820 is controlled to be disconnected according to the first control instruction, so that the power utilization circuit 820 is effectively protected, and the use reliability and the safety are improved.
It should be noted that the preset threshold may be specifically set according to an actual use condition, and the specific setting of the preset threshold is associated with the characteristic signal detected by the switch controller 810, when the characteristic signal detected by the switch controller 810 is a voltage signal, the preset threshold is a preset voltage threshold, and when the characteristic signal is a current signal, the preset threshold is a preset current threshold.
As shown in fig. 2 and 8, in one embodiment, when the characteristic signal detected by the switch controller 810 is a voltage signal, the preset threshold is a preset voltage threshold.
For example, the preset threshold includes at least one of a first voltage threshold, a second voltage threshold and a third voltage threshold, the first voltage threshold is smaller than the second voltage threshold, and the second voltage threshold is smaller than the third voltage threshold, for example, the first voltage threshold is a value associated with an early warning event of the power utilization circuit 820, the second voltage threshold is a value associated with an alarm event, and the third voltage threshold is a value associated with a short-circuit alarm event of the power utilization circuit 820; the characteristic information includes at least one of first information, second information, and third information.
Comparing the characteristic signal with a preset voltage threshold value, and generating a first control instruction and/or characteristic information according to a comparison result, wherein the method comprises the following steps:
step 202, when the voltage signal is greater than the first voltage threshold and less than the second voltage threshold, first information is generated.
When the voltage signal is greater than the first voltage threshold and less than the second voltage threshold, and the power consumption circuit 820 has an early warning event at this time, the switch controller 810 generates first information used for representing the occurrence of the early warning event of the power consumption circuit 820, sends the first information to the terminal device for display, and also can send the first information to the cloud server through the gateway device, so that a basis is provided for unified monitoring.
It should be mentioned that, if the power utilization circuit 820 operates under the condition of the occurrence of the early warning event, the possibility of the occurrence of the operation fault of the power utilization circuit 820 is low, and the operation risk degree is low, but the power utilization circuit 820 also has a certain risk of the occurrence of the operation fault when operating under the condition of the early warning event for a long time, so in practical application, a user can determine whether to send a disconnection instruction to the switch controller 810 through the external device 840 according to the own requirement, and the switch controller 810 can control the relay 830 to be disconnected according to the disconnection instruction so as to cut off the power of the power utilization circuit 820.
And step 204, when the voltage signal is greater than the second voltage threshold and smaller than the third voltage threshold, generating second information and a first control instruction.
When the voltage signal is greater than the second voltage threshold and less than the third voltage threshold, and an alarm event occurs in the power utilization circuit 820 at this time, the switch controller 810 generates second information used for representing the alarm event occurring in the power utilization circuit 820, sends the second information to the terminal device for display, and also sends the second information to the cloud server through the gateway device, so that a basis is provided for unified monitoring.
It should be noted that, if the electric circuit 820 operates when an alarm event occurs, the electric circuit 820 has a high possibility of operating failure and a high risk, and in order to better protect the electric circuit 820, the switch controller 810 generates a first control command, and controls the relay 830 to open according to the first control command so as to power off the electric circuit 820, specifically, the control method includes, but is not limited to, the following two methods:
the first, delay control mode:
presetting a delay time, and generating a first control instruction by the switch controller 810 from the moment when the power utilization circuit 820 just generates an alarm event until the delay control time is reached;
the second, the duration monitoring control mode:
the switch controller 810 monitors the duration of the alarm event and generates a first control command if the duration exceeds a preset safe time voltage threshold.
And step 206, when the voltage signal is greater than the third voltage threshold, generating third information and a first control instruction.
When the voltage signal is greater than the third voltage threshold, and a short-circuit event occurs in the power utilization circuit 820 at this time, the switch controller 810 generates third information for representing the occurrence of the short-circuit event in the power utilization circuit 820, sends the third information to the terminal device for display, and also sends the third information to the cloud server through the gateway device, so that a basis is provided for unified monitoring.
If the electric circuit 820 is operated when a short-circuit event occurs, the electric circuit 820 has an operation failure and a high risk, and in order to protect the electric circuit 820 better, the switch controller 810 generates a first control command, and controls the relay 830 to be turned off according to the first control command, so as to cut off the electric circuit 820.
It should be noted that in the above steps 204 and 206, if the user determines whether to send the opening command to the switch controller 810 through the external device 840 according to his own requirement on the premise of ensuring that the alarm event and the short circuit event are eliminated, the switch controller 810 may control the relay 830 to engage according to the opening command so as to turn on the power utilization circuit 820.
Of course, in other embodiments, when the characteristic signal is a current signal, the preset threshold includes at least one of a first current threshold, a second current threshold and a third current threshold, the first current threshold is smaller than the second current threshold, the second current threshold is smaller than the third current threshold, and the characteristic information includes at least one of first information, second information and third information;
the steps of comparing the characteristic signal with a preset threshold value and generating a first control instruction and/or characteristic information according to the comparison result comprise:
when the current signal is larger than the first current threshold and smaller than the second current threshold, generating first information; the first information is used for representing the occurrence of an early warning event of the power utilization circuit;
when the current signal is greater than the second current threshold and smaller than a third current threshold, generating second information and a first control instruction; the second information is used for representing that an alarm event occurs in the power utilization circuit;
when the current signal is larger than a third current threshold, generating third information and a first control instruction; and the third information is used for representing the occurrence of a short-circuit event of the power utilization loop.
As shown in fig. 3 and 8, in an embodiment, the method further includes a control step based on fault arc monitoring, specifically including:
and step 302, detecting the fault arc according to the characteristic signal.
And analyzing the characteristic signals by using a fault arc detector, and detecting whether fault arc characteristics exist in the characteristic signals.
Step 304, when the fault arc characteristic is detected, generating fourth information and a first control instruction.
When the characteristics of the fault arc are detected, that is, when the fault arc occurs in the electric circuit 820, the switch controller 810 generates fourth information for representing the fault arc occurrence in the electric circuit 820, and sends the fourth information to the terminal device for display, or sends the fourth information to the cloud server through the gateway device, so that a basis is provided for unified monitoring.
It should be noted that, in order to avoid a dangerous situation, the switch controller 810 generates a first control command and controls the relay 830 to open according to the first control command so as to cut off the power utilization circuit 820, because the fault arc is likely to cause an operation fault (e.g., a short circuit, a severe arcing phenomenon, a fire, etc.) of the power utilization circuit 820.
It should be noted that if the user determines whether to send an opening command to the switch controller 810 through the external device 840 according to his own requirement on the premise of ensuring that the short-circuit event is eliminated, the switch controller 810 may control the relay 830 to engage according to the opening command so as to turn on the power utilization circuit 820.
Preferably, in order to facilitate the maintenance of the power utilization circuit 820 for the on-site personnel to accurately find the power utilization circuit 820 with the occurrence of the pre-warning event, the alarm event, the short-circuit event or the fault arc event, the switch controller 810 is further provided with an audible and visual alarm device, and when the power utilization circuit 820 has the occurrence of the pre-warning event, the alarm event, the short-circuit event or the fault arc event, the audible and visual alarm device is used for performing audible and visual alarm.
As shown in fig. 4 and 8, in an embodiment, the method further includes a control step based on a second control instruction, specifically including:
step 402, receiving a second control instruction sent by the external device 840.
The second control instruction includes an opening instruction and/or a breaking instruction, the user sends the second control instruction to the switch controller 810 by operating and controlling on the terminal device, and the switch controller 810 may directly receive the second control instruction from the terminal device through the wireless communication module, or may receive the second control instruction sent from the terminal device to the gateway device through a PLC (power line carrier communication) module or a communication line.
In step 404, the power circuit 820 is controlled according to the second control command.
When the second control instruction is an opening instruction, the switch controller 810 controls the contact of the relay 830 to be engaged according to the opening instruction, so as to control the conduction of the electric circuit 820; when the second control instruction is an open instruction, the switch controller 810 controls the contacts of the relay 830 to open according to the open instruction, so as to control the power consumption circuit 820 to be powered off.
As shown in fig. 5 and 8, in an embodiment, before the step of comparing the characteristic signal with the preset threshold (i.e., the step 104), an updating step of the preset threshold is further included, which specifically includes:
step 502, receiving a threshold update instruction sent by external device 840.
When a user needs to update the preset threshold of the switch controller 810, the external device 840 may input an update value of the preset threshold on the external device 840, and generate a threshold update instruction according to the update value of the preset threshold, and send the threshold update instruction to the switch controller 810. The switch controller 810 may receive the threshold value update instruction directly from the terminal device through the wireless communication module, or may receive the threshold value update instruction transmitted from the terminal device to the gateway device through a PLC (power line carrier communication) module or a communication line.
And step 504, updating the current preset threshold according to the threshold updating instruction.
The switch controller 810 obtains an update value of the preset threshold according to the threshold update instruction, updates the current preset threshold based on the update value of the preset threshold, and compares the characteristic signal with the updated preset threshold in step 104.
The setting of step 502 and step 504 is beneficial for the user to adaptively adjust the preset threshold according to the change of the power utilization rule of the power utilization loop 820, so that the switch control method can adapt to the power utilization rules of different power utilization scenarios, and the applicability of the method is provided.
As shown in fig. 6 and 8, in an embodiment, the method further includes a zero-crossing point protection control step, which specifically includes:
and step 602, performing zero-crossing detection according to the characteristic signal, and acquiring a zero-crossing point of the power utilization loop 820.
The zero-crossing point is a voltage zero-crossing point and/or a current zero-crossing point of the power consumption circuit 820.
It should be noted that the zero crossing point specifically detected by the switch controller 810 is associated with the on-off state of the power utilization circuit 820, when the power utilization circuit 820 is in the power-off state, the power utilization circuit 820 has voltage but no current, the switch controller 810 may detect the zero crossing point of the voltage according to the voltage signal, and when the power utilization circuit 820 is in the on state, the power utilization circuit 820 has voltage and has current, the switch controller 810 may detect the zero crossing point of the voltage and the zero crossing point of the current according to the voltage signal and the current signal, respectively.
And step 604, calculating and acquiring the characteristic protection point according to the zero crossing point and a preset action time threshold.
Wherein the characteristic protection points comprise a first protection point Tm1And/or a second protection point Tm2First protective Point Tm1Based on voltage zero crossingCalculating point and action time threshold value to obtain second protection point Tm2And calculating and obtaining the current zero crossing point and the action time threshold.
It should be noted that, because the contact of the relay 830 is engaged or disengaged as a mechanical movement process, the relay 830 consumes a certain movement execution time from the process of receiving the control command, executing the engagement or disengagement movement according to the control command, and finally actually engaging or actually disengaging the contact, which directly results in that the process from the power-off to the power-on or from the power-on to the power-off of the control power circuit 820 of the relay 830 needs a certain time, the movement execution times of different relays 830 are determined according to the conditions of the relay 830, and the engagement movement execution time and the disengagement movement execution time of the same relay 830 may be the same or different. The above-mentioned motion execution time may be obtained by actual measurement, or, of course, other obtaining methods are also possible.
In order to avoid missing a zero crossing point when the relay 830 is controlled to be turned on or off due to the existence of the action execution time, the action time threshold value is specifically set in advance according to the action execution time of the relay 830 in step 604, and of course, the user may also perform customized adjustment on the action time threshold value during the use of the switch controller 810.
Further, the specific calculation step in step 604 above is:
step one, acquiring a zero crossing point and an action time threshold t0The time difference between them;
and step two, determining the characteristic protection point according to the time difference.
Wherein, in the above step, the time difference is obtained by subtracting the action time threshold t from the zero crossing point0The difference obtained, for example, in some embodiments, the zero crossing of the voltage minus a time threshold t of actuation corresponding to the engagement action01The obtained difference is the first protection point Tm1Current zero crossing minus action time threshold t corresponding to engagement action02The obtained difference is the second protection point Tm2。
Step 606, when the first control instruction and/or the second control instruction are/is acquired, controlling the power utilization loop 820 at the characteristic protection point according to the first control instruction or the second control instruction; wherein the second control instruction is received and obtained by the switch controller from the external device.
Wherein the first control command is a turn-off command and the second control command includes at least one of a turn-on command and a turn-off command, and specifically, the switch controller 810 starts to execute the turn-on command at the first protection point and starts to execute the turn-off command at the second protection point.
In the above-mentioned switch control method, the zero crossing point is detected, the characteristic protection point is obtained based on the zero crossing point and the preset action time threshold, when the control instruction (the first control instruction or the second control instruction) is obtained, that is, the on-off state of the power utilization circuit 820 needs to be controlled, the switch controller 810 starts to execute the opening instruction at the first protection point and starts to execute the opening instruction at the second protection point, because the characteristic protection point is advanced by an action time threshold compared with the zero crossing point, that is, the switch controller 810 starts to execute the control instruction before the zero crossing point of the power utilization circuit 820, so that the relay 830 is controlled to execute the engaging or disengaging action before the zero crossing point, a condition is provided for the contact of the relay 830 to engage or disengage at the zero crossing point, which is beneficial to ensuring that the contact of the relay 830 engages at the zero crossing point, or the current is cut off at the zero crossing point, so that the arcing phenomenon generated when the contacts are separated and the sparking phenomenon generated when the contacts are contacted are avoided, and the use reliability and safety are improved.
As shown in fig. 7-8, in one embodiment, the step of detecting a zero crossing of the electrical circuit 820 comprises:
in step 702, the current on/off state of the power utilization circuit 820 is determined.
The on-off state comprises a power-off state and a conducting state; specifically, it is determined whether the current signal is input to the power consumption circuit 820, and if yes, the power consumption circuit is turned on, and if not, the power consumption circuit is turned off.
In step 704, when the power consumption circuit 820 is in a power-off state, a voltage zero crossing point is detected according to the voltage signal.
In step 706, when the power utilization circuit 820 is in a conducting state, the current zero crossing point is detected according to the current signal.
In the above steps, when performing zero-crossing detection, a series of signal processing needs to be performed on the voltage signal or the current signal, and the signal processing process consumes a certain time, actually, when the power consumption circuit 820 is in the power-off state, the switch controller 810 only needs to detect the voltage zero-crossing point, and when the power consumption circuit 820 is in the conducting state, the switch controller 810 only needs to detect the current zero-crossing point, so through the setting of the step 702 and 706, the switch controller 810 adaptively adjusts the zero-crossing detection step according to the current on-off state of the power consumption circuit 820, thereby effectively avoiding that the switch controller 810 consumes much time due to performing redundant signal processing or calculation processes (for example, a process of performing current zero-crossing point detection when the power consumption circuit 820 is in the power-off state, or a process of performing voltage zero-crossing point detection when the power consumption circuit 820 is in the conducting state), the switch controller 810 can accurately and quickly perform zero-crossing detection, obtain the zero-crossing point matched with the current on-off state, and reduce the time for detecting the zero-crossing point, so that the switch controller 810 can more accurately and quickly generate the control instruction matched with the current on-off state.
It should be understood that although the various steps in the flow charts of fig. 1-7 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-7 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
Referring to fig. 8-9, in an embodiment, the invention provides a switch controller 810 to which the above-mentioned switch control method can be applied, and the switch controller 810 is applied to a switch control system.
In one embodiment, the switch control system includes a switch controller 810 and a relay 830 coupled to the switch controller 810.
The relay 830 is connected between the input end and the output end of the power utilization circuit 820, and the specific structural form of the relay 830 may be specifically set according to the actual use requirement, for example, in some embodiments, the relay 830 is specifically a magnetic latching relay; switch controller 810 is used for being connected with power consumption circuit 820 and relay 830 respectively, control with the switching on or off of power consumption circuit 820, specifically, switch controller 810 includes electric detection module 811, calculation module 812, communication module 813 and control module 814, electric detection module 811 is connected with calculation module 812, calculation module 812 is still connected with communication module 813 and control module 814 respectively, communication module 813 is still connected with control module 814 and is connected with external equipment 840 communication, control module 814 is still connected with relay 830. Wherein:
the electrical detection module 811 is configured to detect a characteristic signal of the power utilization circuit 820, where the characteristic signal includes a voltage signal and/or a current signal in the power utilization circuit 820.
And the calculating module 812 is configured to compare the characteristic signal with a preset threshold, and generate a first control instruction and/or characteristic information according to a comparison result. The characteristic information is used to characterize the operating state of the power utilization circuit 820.
A communication module 813, configured to send the feature information to the external device 840 when the feature information is generated. The external device 840 is configured to display an operating state of the power consumption circuit 820 according to the characteristic information.
The control module 814 is configured to control the power utilization circuit 820 to be turned off according to the first control instruction when the first control instruction is generated.
In one embodiment, the preset threshold includes at least one of a first threshold and a second threshold, the first threshold is smaller than the second threshold, and the second threshold is smaller than the third threshold;
a calculating module 812, configured to generate first information when the characteristic signal is greater than a first threshold and smaller than a second threshold; when the characteristic signal is greater than the second threshold and smaller than a third threshold, generating second information and a first control instruction; and when the characteristic signal is larger than a third threshold value, generating third information and a first control instruction.
In one embodiment, the electrical detection module 811 is further configured to perform fault arc detection based on the characteristic signal; a calculation module 812 for generating fourth information and a first control instruction when the fault arc characteristic is detected.
In one embodiment, the communication module 813 is further configured to receive a second control instruction sent by the external device 840, where the second control instruction includes an open instruction and/or a disconnect instruction; the control module 814 is further configured to control the power utilization circuit 820 to be turned on or off according to the second control instruction.
In one embodiment, the communication module 813 is further configured to receive a threshold updating instruction sent by the external device 840; the control module 814 is further configured to update the current preset threshold according to the threshold update instruction.
As shown in fig. 8 and 10, in one embodiment, the switch controller 810 further comprises a zero crossing detection module 815, wherein:
a zero-crossing detection module 815, which is respectively connected to the electrical detection module 811 and the calculation module 812, and configured to perform zero-crossing detection according to the characteristic signal, and obtain a zero-crossing point of the power consumption circuit 820, where the zero-crossing point is a voltage zero-crossing point and/or a current zero-crossing point of the power consumption circuit 820;
the calculating module 812 is further configured to calculate and obtain a feature protection point according to the zero crossing point and a preset action time threshold;
the control module 814 is further configured to control the power utilization circuit 820 to be turned on or off at the feature protection point according to the first control instruction or the second control instruction when the first control instruction and/or the second control instruction are obtained; wherein the second control instruction comprises an opening instruction and/or a disconnection instruction.
Further, in an embodiment, the zero-crossing detection module 815 is further configured to determine a current on-off state of the power utilization circuit 820, where the on-off state includes a power-off state and a power-on state; when the power utilization circuit 820 is in a power-off state, detecting a voltage zero crossing point according to the voltage signal; when the utilization circuit 820 is in the on state, the zero crossing of the current is detected according to the current signal.
Those skilled in the art will appreciate that the configurations shown in fig. 8-10 are merely block diagrams of some configurations relevant to the present teachings and do not constitute a limitation on the switch controller 810 to which the present teachings are applied, and that a particular switch controller 810 may include more or fewer components than shown, or combine certain components, or have a different arrangement of components.
A switch control system comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the switch control method when executing the computer program.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned switch control method.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A switch control method applied to a switch controller, the switch controller being connected to an electricity utilization loop and being used for controlling the conduction or the disconnection of the electricity utilization loop, the method comprising:
detecting a characteristic signal of the power utilization loop; wherein the characteristic signal comprises a voltage signal and/or a current signal in the power utilization circuit;
comparing the characteristic signal with a preset threshold value, and generating a first control instruction and/or characteristic information according to a comparison result; the characteristic information is used for representing the running state of the power utilization circuit;
when the feature information is generated, the feature information is sent to external equipment; the external equipment is used for displaying the running state of the power utilization circuit according to the characteristic information;
and when the first control instruction is generated, controlling the power utilization circuit to be disconnected according to the first control instruction.
2. The switch control method according to claim 1, wherein when the characteristic signal is a voltage signal, the preset threshold includes at least one of a first voltage threshold, a second voltage threshold and a third voltage threshold, the first voltage threshold is smaller than the second voltage threshold, the second voltage threshold is smaller than the third voltage threshold, and the characteristic information includes at least one of first information, second information and third information;
the steps of comparing the characteristic signal with a preset threshold value and generating a first control instruction and/or characteristic information according to the comparison result comprise:
when the voltage signal is greater than the first voltage threshold and less than the second voltage threshold, generating first information; the first information is used for representing that an early warning event occurs in the power utilization circuit;
when the voltage signal is greater than the second voltage threshold and smaller than the third voltage threshold, generating second information and the first control instruction; wherein the second information is used for representing that an alarm event occurs in the power utilization loop;
when the voltage signal is greater than the third voltage threshold, generating third information and the first control instruction; wherein the third information is used for representing that the electric circuit is short-circuited.
3. The switch control method according to claim 1, wherein when the characteristic signal is a current signal, the preset threshold includes at least one of a first current threshold, a second current threshold and a third current threshold, the first current threshold is smaller than the second current threshold, the second current threshold is smaller than the third current threshold, and the characteristic information includes at least one of first information, second information and third information;
the steps of comparing the characteristic signal with a preset threshold value and generating a first control instruction and/or characteristic information according to the comparison result comprise:
when the current signal is larger than the first current threshold and smaller than the second current threshold, generating first information; the first information is used for representing that an early warning event occurs in the power utilization circuit;
when the current signal is larger than the second current threshold and smaller than the third current threshold, generating second information and the first control instruction; wherein the second information is used for representing that an alarm event occurs in the power utilization loop;
when the current signal is larger than the third current threshold, generating third information and the first control instruction; wherein the third information is used for representing that the electric circuit is short-circuited.
4. The switch control method according to claim 1, wherein the characteristic information includes fourth information; the method further comprises the following steps:
detecting fault electric arcs according to the characteristic signals;
when the fault arc characteristic is detected, generating the fourth information and the first control instruction; wherein the fourth information is used to characterize a fault arc event occurring with the electrical circuit.
5. The switch control method of claim 1, further comprising:
receiving a second control instruction sent by the external equipment; and controlling the power utilization loop according to the second control instruction.
6. The switch control method according to any one of claims 1-5, characterized in that the method further comprises:
performing zero-crossing detection according to the characteristic signal to obtain a zero-crossing point of the power utilization circuit; wherein the zero-crossing points comprise voltage zero-crossing points and/or current zero-crossing points of the power utilization circuit;
acquiring a characteristic protection point according to the zero crossing point and a preset action time threshold;
when the first control instruction and/or the second control instruction are/is acquired, controlling the power utilization loop at the characteristic protection point according to the first control instruction or the second control instruction; wherein the second control instruction is received by the switch controller from the external device.
7. The switching control method according to claim 6, wherein the step of performing zero-crossing detection based on the characteristic signal to obtain a zero-crossing point of the power utilization loop comprises:
judging the current on-off state of the power utilization loop; wherein the on-off state comprises a power-off state and a conducting state;
when the circuit is in a power-off state, detecting a voltage zero crossing point according to the voltage signal; and/or the presence of a gas in the gas,
and when the circuit using loop is in a conducting state, detecting a current zero crossing point according to the current signal.
8. The switch control method according to any one of claims 1 to 5, wherein the step of comparing the characteristic signal with a preset threshold value is preceded by the steps of:
receiving a threshold updating instruction sent by the external equipment;
and updating the current preset threshold according to the threshold updating instruction.
9. A switch control system is characterized by comprising a switch controller and a relay, wherein the relay is connected between an input end and an output end of an electric circuit; the switch controller comprises an electrical detection module, a calculation module, a communication module and a control module, wherein the electrical detection module is connected with the calculation module, the calculation module is respectively connected with the communication module and the control module, the communication module is connected with the control module and is in communication connection with external equipment, and the control module is connected with the relay, wherein:
the electrical detection module is used for detecting a characteristic signal of the power utilization loop; wherein the characteristic signal is a voltage signal and/or a current signal in the power utilization loop;
the calculation module is used for comparing the characteristic signal with a preset threshold value and generating a first control instruction and/or characteristic information according to a comparison result; the characteristic information is used for representing the running state of the power utilization circuit;
the communication module is used for sending the characteristic information to external equipment when the characteristic information is generated; the external equipment is used for displaying the running state of the power utilization circuit according to the characteristic information;
and the control module is used for controlling the power utilization circuit to be disconnected according to the first control instruction when the first control instruction is generated.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the switch control method according to any one of claims 1 to 8.
CN202110575545.5A 2021-05-26 2021-05-26 Switch control method, system and storage medium Pending CN113472070A (en)

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