CN110988592A - Electric leakage safety monitoring device and method - Google Patents
Electric leakage safety monitoring device and method Download PDFInfo
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- CN110988592A CN110988592A CN201911178235.9A CN201911178235A CN110988592A CN 110988592 A CN110988592 A CN 110988592A CN 201911178235 A CN201911178235 A CN 201911178235A CN 110988592 A CN110988592 A CN 110988592A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/02—Monitoring continuously signalling or alarm systems
- G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
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- 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
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- 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
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- 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
- H02H3/26—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 responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- Computer Security & Cryptography (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
An electrical leakage safety monitoring device and method, the device comprising: the system comprises an electric leakage acquisition module, a switch state monitoring module, a data analysis processing module, a power supply module, an early warning device, a switch trip module, an electric leakage monitoring platform cloud server, a Bluetooth module and a mobile terminal; the leakage monitoring system comprises a leakage acquisition module, a switch state monitoring module, a data analysis and processing module, a switch trip module, a switch state detection module, a pre-alarm module, a leakage monitoring platform cloud server and a mobile terminal, wherein the leakage acquisition module and the switch state monitoring module respectively monitor leakage current and a switch state of a low-voltage circuit, the data analysis and processing module carries out analog-digital conversion on monitored data to obtain a leakage current value and a switch state, then different command signals are sent out by judging sections with the leakage current value being at a preset threshold value, the pre-alarm is respectively controlled to send out an early warning signal and the switch; the device can give an alarm or trip in time when electric leakage occurs, and can store and check the running state, thereby improving the practicability and reliability of low-voltage circuit monitoring.
Description
Technical Field
The invention belongs to the technical field of low-voltage power distribution of an electric power system, and particularly relates to a leakage safety monitoring device and method.
Background
The leakage monitoring is mainly aimed at a low-voltage power distribution system and is used for predicting electric fire accidents in advance. The installation of a residual current operated circuit breaker, commonly known as a leakage protector, in a low-voltage distribution system is one of effective measures for preventing direct contact electric shock accidents and indirect contact electric shock accidents, and is also a technical measure for preventing electrical fire and electrical equipment damage accidents caused by grounding faults of electrical circuits or electrical equipment.
The residual current operated circuit breaker lacks the monitoring to running state among the practical application, can not audio-visually look over running state, also can not show a large amount of electric leakage fault information simultaneously, and maintenance personal is difficult to know information such as the concrete time, place, the leakage current size that take place the electric leakage in the short time, and then is difficult to carry out effectual electric leakage trouble shooting and recovery, has constituted very big threat to personal safety.
Therefore, it is necessary to introduce a real-time monitoring technology to monitor the leakage data and perform leakage safety protection, so as to provide an accurate basis for removing and recovering the leakage fault of the low-voltage power grid, thereby affecting the safe and reliable operation of the low-voltage power grid.
Disclosure of Invention
In view of the problems in the prior art, the present invention provides a leakage safety monitoring device and method.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
according to a first aspect of embodiments of the present invention, there is provided an electrical leakage safety monitoring device, the device including:
the leakage current acquisition module is connected to a low-voltage distribution line to monitor the leakage current of the low-voltage distribution line in real time;
the switch state monitoring module is used for being connected to a low-voltage switch in the low-voltage distribution line so as to monitor the switching-on and switching-off states of the low-voltage switch in real time;
the data analysis processing module is used for receiving the monitoring data of the electric leakage acquisition module and the switch state monitoring module, performing analog-digital conversion to obtain an electric leakage current value and a switch state, analyzing a preset threshold section where the electric leakage current value is located, and then sending a command signal, wherein when the electric leakage current value is greater than or equal to an early warning threshold value and less than a trip threshold value, a first command signal is sent, and when the electric leakage current value is greater than or equal to the trip threshold value, a second command signal is sent;
the power supply module obtains electricity from the low-voltage distribution circuit and supplies the electricity to the data analysis processing module;
the early warning device is connected with the data analysis processing module and used for sending out an early warning signal according to the first command signal;
the switch tripping module is connected with the data analysis processing module and used for controlling the switching-off action of the low-voltage switch according to the second command signal and the switching state;
the electric leakage monitoring platform cloud server is in communication connection with the data analysis processing module and is used for storing the electric leakage current value and the switch state transmitted by the data analysis module;
the Bluetooth module is arranged on the data processing module and is used for transmitting the leakage current value and the switch state of the data processing module;
the mobile terminal can be connected with the data analysis processing module through the Bluetooth module to obtain the leakage current value and the on-off state; the system can be in communication connection with the electric leakage monitoring platform cloud server to obtain the electric leakage current value and the on-off state stored in the electric leakage monitoring platform cloud server.
Further, the switch trip module is further configured to:
and after the switching-off action of the low-voltage switch is controlled and preset time is passed, the switch tripping module controls the switching-on action of the low-voltage switch.
Further, the mobile terminal is further configured to: and after the Bluetooth module is connected with the data analysis processing module, setting the preset threshold.
Further, the mobile terminal is further configured to: after the electric leakage current value stored in the electric leakage monitoring platform cloud server is obtained;
analyzing a preset threshold section where the leakage current value is located;
if the leakage current value is greater than or equal to the early warning threshold value and less than the trip threshold value, sending an early warning message;
if the leakage current value is greater than or equal to the tripping threshold value, sending a tripping message;
and if the leakage current value is 0 and lasts for the preset time, sending a message of permanent trip.
Further, the early warning signal sent by the early warning device comprises a sound early warning, a bright light early warning and/or a vibration early warning.
According to a second aspect of the embodiments of the present invention, there is provided an electrical leakage safety monitoring method, using the electrical leakage safety monitoring device provided in the first aspect of the embodiments of the present invention, the method including:
monitoring the leakage current of the low-voltage distribution line by using a leakage acquisition module;
converting the leakage current analog-digital into a leakage current value by using a data analysis processing module;
analyzing a preset threshold section where the leakage current value is located by using a data analysis processing module;
if the leakage current value is smaller than the early warning threshold value, the data processing module uploads the leakage current value and the on-off state to a leakage monitoring platform cloud server in real time;
if the leakage current value is greater than or equal to the early warning threshold value and smaller than the trip threshold value, the data analysis processing module sends a first command signal to an early warning device, the early warning device sends an early warning signal according to the first command signal, meanwhile, the leakage current value and the switch state are uploaded to a leakage monitoring platform cloud server, and the low-voltage circuit continues to normally operate after the signals are reset;
and if the leakage current value is greater than or equal to the tripping threshold value, the data analysis processing module sends a second command signal to the switch tripping module, and the switch tripping module performs a switching-off action according to the second command signal.
Further, after the switch trip module controls the low-voltage switch to perform the opening action, the method further comprises the following steps:
the switch state monitoring module monitors the state of the low-voltage switch, transmits information to the data analysis processing module, judges whether the switching-off is successful,
and if the low-voltage switch is not successfully switched off, the data analysis processing module continuously sends the second command signal to the switch tripping module, and the switch tripping module continuously performs the switching-off action according to the second command signal.
Further, after the switch trip module successfully controls the low-voltage switch to open, the method further comprises the following steps:
after the preset time, the switch tripping module controls the low-voltage switch to carry out closing action,
the switch state monitoring module monitors whether the low-voltage switch is successfully switched on,
if the low-voltage switch is successfully switched on, the low-voltage circuit is judged to normally operate,
and if the low-voltage switch is not successfully switched on, judging that the low-voltage switch is permanently tripped.
Further, after determining that the low-voltage switch is permanently tripped, the method further comprises:
the electric leakage current value stored by the electric leakage monitoring platform cloud server is 0;
and after the mobile terminal acquires that the leakage current value is 0 and lasts for a preset time from the leakage monitoring platform cloud server, the mobile terminal sends information of permanent tripping to operation and maintenance personnel.
Based on the above embodiments, the leakage safety monitoring device and method provided by the embodiments of the present invention construct a set of complete leakage monitoring and early warning device for a low-voltage power distribution system; the leakage current of the low-voltage distribution line can be monitored and analyzed in real time through the leakage current acquisition module and the data analysis processing module, then early warning is sent out or a switch is automatically turned off, monitored data are stored and checked through the leakage current monitoring platform cloud server and the mobile terminal, and the mobile terminal can also send a reminding message to operation and maintenance personnel when a leakage accident occurs; the leakage protection device effectively overcomes the defect that operation and maintenance personnel who exist in the current low-voltage power distribution system leakage protection are difficult to know information such as specific time, place and leakage current of leakage in a short time, and has high practicability and application value.
Drawings
The invention is further described below with reference to the figures and examples.
Fig. 1 is a schematic diagram of a basic structure of an electrical leakage safety monitoring device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a leakage safety monitoring method according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, 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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic diagram of a basic structure of an electrical leakage safety monitoring device according to an embodiment of the present invention. As shown in fig. 1, the monitoring device includes an electric leakage collecting module 1, a switch state monitoring module 2, a data analyzing and processing module 3, a power module 4, an early warning device 5, a switch tripping module 6, an electric leakage monitoring platform cloud server 7, a bluetooth module 8, and a mobile terminal 9.
Specifically, electric leakage collection module 1 for connect in low pressure distribution lines, carry out real-time supervision to the electric leakage current of low pressure distribution lines, then transmit the electric leakage current data that detect to data analysis and processing module 3. The leakage current acquisition module 1 provides leakage current basic data for the whole detection device, and the accuracy of the detection device is ensured.
And the switch state monitoring module 2 is used for connecting the low-voltage switch in the low-voltage distribution line to monitor the closing and opening states of the low-voltage switch in real time. The method is mainly used for judging whether reclosing is successful after the low-voltage switch is opened; meanwhile, the tripping action of the switch tripping module 6 can be completed in an auxiliary mode, namely, the low-voltage switch is ensured to be in a switching-off state after switching-off action is carried out, so that more dangerous accidents caused by unsuccessful switching-off or disordered switching-on and switching-off actions are avoided. The provision of the module enhances the safety of the low voltage circuit.
And the data analysis processing module 3 is used for receiving the leakage current and the switching state data monitored by the leakage current acquisition module 1 and the switching state monitoring module 2, and performing analog-digital conversion to obtain a leakage current value and a switching state. And further, analyzing a preset threshold section where the leakage current value is located, and then sending out a command signal, wherein when the leakage current value is greater than or equal to the early warning threshold and less than the trip threshold, a first command signal is sent out, and when the leakage current value is greater than or equal to the trip threshold, a second command signal is sent out. The data analysis processing module 3 plays a role of a brain in the monitoring device, receives data information, processes the data information and sends command signals.
And the power supply module 4 is used for getting power from the low-voltage distribution circuit and supplying the power to the data analysis processing module 3.
And the early warning device 5 is connected with the data analysis processing module 3 and is used for sending out an early warning signal according to the first command signal. The early warning signals comprise sound early warning, highlight early warning and/or vibration early warning, and a proper early warning mode can be selected according to the external environmental characteristics of the monitoring point, for example, the combination of sound, highlight and vibration early warning signals can be selected outdoors with noisy external environment, and one or more early warning devices 5 can also be selected to be installed, so that field workers can obtain early warning information in time and leave the field.
And the switch tripping module 6 is also connected with the data analysis processing module 3 and is used for controlling the low-voltage switch to perform a switching-off action according to the second command signal. The switching-off and switching-on actions of the low-voltage switch are controlled by the switch tripping module 6 according to a second command signal sent by the data analysis processing module 3, the switching-off state of the low-voltage switch is monitored by the switch state monitoring module 2 after the actions are finished, if the switching-off is unsuccessful, the switching-off actions are carried out again until the switching-off is successful, the switching-off actions can be more accurately carried out, and the low-voltage switch is ensured to be switched off when the electric leakage danger occurs. In addition, after the low-voltage switch is successfully switched off and preset time passes, the switch tripping module 6 tries to control the low-voltage switch to make a switching-on action again.
And the electric leakage monitoring platform cloud server 7 is in communication connection with the data analysis processing module 3 and is used for storing the electric leakage current value and the switch state transmitted by the data analysis module. The storage of the leakage current value and the on-off state by the leakage monitoring platform cloud server 7 is the basis for visually checking the operation state and simultaneously displaying a large amount of leakage fault information by the device.
And the Bluetooth module 8 is installed on the data analysis processing module 3 and used for transmitting the leakage current value and the switch state.
The mobile terminal 9 can be connected with the data analysis processing module 3 through the bluetooth module 8 to obtain a leakage current value and a switch state, and can set a preset threshold value. The leakage current monitoring system can be in communication connection with the leakage current monitoring platform cloud server 7, the leakage current value and the on-off state stored in the leakage current monitoring platform cloud server 7 are obtained, and the preset threshold section where the leakage current value is located is analyzed. If the leakage current value is greater than or equal to the early warning threshold value and less than the tripping threshold value, sending out an early warning message; if the current value of the leakage current is larger than or equal to the tripping threshold value, sending a tripping push message; and if the leakage current value is 0 and lasts for a preset time, sending a push message of permanent tripping. The mobile terminal 9 is introduced, so that operation and maintenance personnel can conveniently check the running state of the low-voltage circuit in real time, and the preset threshold value can be adjusted according to changes of actual circuits and power grid bearing capacity of different measuring points, so that the safe running of the circuit can be ensured when the circuit is aged. In addition, when an electric leakage accident occurs, the mobile terminal 9 can send information such as early warning to operation and maintenance personnel in time, so that the operation and maintenance personnel can obtain information such as specific time, place and magnitude of leakage current of the electric leakage at the first time, and further effective leakage fault removal and recovery are performed, personal safety is guaranteed, and influences on life and production are reduced.
The leakage collection module 1, the switch state monitoring module 2, the data analysis processing module 3, the power module 4, the early warning device 5, the switch tripping module 6 and the Bluetooth module 8 form part of the device and can be installed on a plurality of low-voltage circuits. The electric leakage monitoring platform cloud server 7 can store electric leakage current values and on-off states of communication transmission of the data analysis processing modules 3. And the mobile terminal 9 is in communication connection with the electric leakage monitoring platform cloud server 7, acquires all electric leakage current values and on-off states stored in the electric leakage monitoring platform cloud server 7, simultaneously displays a large amount of electric leakage fault information, and can selectively check the electric leakage fault information.
This electric leakage safety monitoring device not only can send the early warning and carry out the action of switch separating brake, timely warning and power-off protection when realizing that low-voltage circuit takes place electric leakage danger, the effectual difficult problem of threat to personal safety when having solved low-voltage circuit and taking place electric leakage danger. And can also store the low-voltage circuit leakage current value and the on-off state of different monitoring points through electric leakage monitoring platform cloud ware, fortune dimension staff can carry out audio-visual looking over to the leakage current value and the on-off state of a plurality of monitoring points through mobile terminal at any time, the circuit running state of each monitoring point of acquisition that can be timely accurate. When the early warning or the switch is tripped, operation and maintenance personnel can obtain information such as specific time, place and leakage current of leakage at the first time through reminding information sent by the mobile terminal, so that effective leakage fault removal and recovery can be carried out timely, and the threat to personal safety is reduced. Therefore, the electric leakage safety monitoring device effectively solves the problems that in the prior art, the running state cannot be visually checked, a large amount of electric leakage fault information cannot be displayed at the same time, and maintenance personnel cannot know the specific time, place, magnitude of electric leakage current and other information of electric leakage in a short time, so that effective electric leakage fault removal and recovery are difficult to carry out, and the personal safety is greatly threatened.
Fig. 2 is a schematic flow chart of a leakage safety monitoring method according to an embodiment of the present invention, where the monitoring method includes the steps of:
and the S01 data acquisition module acquires the leakage current of the low-voltage line.
In this embodiment, the leakage current of the low-voltage line is collected in real time by the leakage current collecting module, and the leakage current data is transmitted to the data analyzing and processing module.
The S02 data analysis processing module converts the leakage current into the leakage current value in an analog-digital mode.
And the S03 data analysis processing module analyzes a preset threshold section where the leakage current value is located.
In this embodiment, the data analysis processing module may preset the leakage current value as different threshold segments. And when the leakage current value is smaller than the preset early warning threshold value, executing the step S04. And when the leakage current value is greater than or equal to the preset early warning threshold value and less than the preset trip threshold value, executing the steps S04 and S06 at the same time. When the leakage current value reaches the preset trip threshold value, the step S08 is executed.
And S04, transmitting the electric leakage current value to an electric leakage monitoring platform cloud server for storage.
S05 the mobile terminal checks the operation status.
In this embodiment, the mobile terminal is in communication connection with the electric leakage monitoring platform cloud server, obtains the electric leakage current value on the electric leakage monitoring platform cloud server, and can check at any time.
And S06, sending a command to the early warning device, and sending an early warning signal by the early warning device.
In this embodiment, the data analysis processing module sends out the first command signal when the preset threshold section where the leakage current value is located is greater than or equal to the preset early warning threshold and less than the preset trip threshold, and the early warning device receives the first command signal and sends out the early warning signal. And meanwhile, the leakage current value is transmitted to the leakage safety monitoring operation platform for storage. After the signal is restored, step S07 is executed.
S07 low voltage line is operating normally.
S08 sends command to the switch tripping module, the low voltage switch is opened.
In this embodiment, the data analysis processing module sends out the second command signal when the preset threshold section where the leakage current value is located is greater than or equal to the preset trip threshold, and the switch trip module receives the second command signal and controls the low-voltage switch to perform the opening operation. Step S09 is executed after this step.
S09 judges if the opening is successful.
In this embodiment, when the switch trip module receives the second command signal, the low-voltage switch is controlled to perform switching-off, but whether switching-off is really successful cannot be guaranteed. When the opening is successful, step S10 is executed. Otherwise, the process continues to S08 until the switch is successfully opened.
And S10, the switch tripping module tries reclosing action after a certain preset time.
In the embodiment, after the switch is successfully opened, the switch tripping module tries to perform reclosing action after a certain preset time, and the step is set to recover power supply in time when the electric leakage accident is eliminated in a short time, so that normal operation of life and production is guaranteed.
S11 judges whether or not the switch coincidence is successful.
In this embodiment, when the leakage accident is eliminated in a short time, the switch coincidence can be performed normally. When the leakage accident is not eliminated in a short time, the switch coincidence cannot be normally carried out. Therefore, the switch state monitoring module judges and monitors the state of the switch and judges whether the switch is successfully superposed or not. If the coincidence is successful, step S07S is performed, i.e., the low-voltage line is normally operated. Otherwise, step S12 is executed.
And the S12 switch is tripped permanently and is processed by operation and maintenance personnel.
In this embodiment, when the low-voltage switch is unsuccessfully overlapped, the leakage current value stored by the cloud server of the leakage monitoring platform is continuously 0. And after the leakage current value acquired by the mobile terminal is 0 and lasts for a preset time, sending permanent trip pushing information to operation and maintenance personnel, and carrying out troubleshooting work by intervention of the operation and maintenance personnel.
The leakage safety monitoring device and the leakage safety monitoring method can not only send out early warning and carry out switching-off and switching-off actions, realize timely reminding and power-off protection when the low-voltage circuit is in leakage danger, and effectively solve the problem of threat to personal safety when the low-voltage circuit is in leakage danger. And can also store the low-voltage circuit leakage current value and the on-off state of different monitoring points through electric leakage monitoring platform cloud ware, fortune dimension staff can carry out audio-visual looking over to the leakage current value and the on-off state of a plurality of monitoring points through mobile terminal at any time, the circuit running state of each monitoring point of acquisition that can be timely accurate. When the early warning or the switch is tripped, operation and maintenance personnel can obtain information such as specific time, place and leakage current of leakage at the first time through reminding information sent by the mobile terminal, so that effective leakage fault removal and recovery can be carried out timely, and the threat to personal safety is reduced. Therefore, the leakage safety monitoring device and the leakage safety monitoring method effectively solve the problems that in the prior art, the running state cannot be visually checked, a large amount of leakage fault information cannot be displayed at the same time, maintenance personnel cannot know the specific time, place, leakage current and other information of leakage in a short time, and further cannot effectively eliminate and recover the leakage fault, so that the personal safety is greatly threatened, and the like.
The embodiments in this specification are described in a progressive manner. Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (9)
1. An electrical leakage safety monitoring device, comprising:
the leakage current acquisition module is connected to a low-voltage distribution line to monitor the leakage current of the low-voltage distribution line in real time;
the switch state monitoring module is used for being connected to a low-voltage switch in the low-voltage distribution line so as to monitor the switching-on and switching-off states of the low-voltage switch in real time;
the data analysis processing module is used for receiving the monitoring data of the electric leakage acquisition module and the switch state monitoring module, performing analog-digital conversion to obtain an electric leakage current value and a switch state, analyzing a preset threshold section where the electric leakage current value is located, and then sending a command signal, wherein when the electric leakage current value is greater than or equal to an early warning threshold value and less than a trip threshold value, a first command signal is sent, and when the electric leakage current value is greater than or equal to the trip threshold value, a second command signal is sent;
the power supply module obtains electricity from the low-voltage distribution circuit and supplies the electricity to the data analysis processing module;
the early warning device is connected with the data analysis processing module and used for sending out an early warning signal according to the first command signal;
the switch tripping module is connected with the data analysis processing module and used for controlling the switching-off action of the low-voltage switch according to the second command signal and the switching state;
the electric leakage monitoring platform cloud server is in communication connection with the data analysis processing module and is used for storing the electric leakage current value and the switch state transmitted by the data analysis module;
the Bluetooth module is arranged on the data processing module and is used for transmitting the leakage current value and the switch state of the data processing module;
the mobile terminal can be connected with the data analysis processing module through the Bluetooth module to obtain the leakage current value and the on-off state; the system can be in communication connection with the electric leakage monitoring platform cloud server to obtain the electric leakage current value and the on-off state stored in the electric leakage monitoring platform cloud server.
2. The electrical leakage safety monitoring device of claim 1, wherein the switch trip module is further configured to:
and after the switching-off action of the low-voltage switch is controlled and preset time is passed, the switch tripping module controls the switching-on action of the low-voltage switch.
3. The electrical leakage safety monitoring device according to claim 1, wherein the mobile terminal is further configured to: and after the Bluetooth module is connected with the data analysis processing module, setting the preset threshold.
4. The electrical leakage safety monitoring device according to claim 1, wherein the mobile terminal is further configured to: after the electric leakage current value stored in the electric leakage monitoring platform cloud server is obtained;
analyzing a preset threshold section where the leakage current value is located;
if the leakage current value is greater than or equal to the early warning threshold value and less than the trip threshold value, sending an early warning message;
if the leakage current value is greater than or equal to the tripping threshold value, sending a tripping message;
and if the leakage current value is 0 and lasts for the preset time, sending a message of permanent trip.
5. The electrical leakage safety monitoring device according to claim 1, wherein the warning signal from the warning device comprises a sound warning, a glare warning and/or a vibration warning.
6. An electrical leakage safety monitoring method, using the electrical leakage safety monitoring device according to any one of claims 1 to 5, the method comprising:
monitoring the leakage current of the low-voltage distribution line by using a leakage acquisition module;
converting the leakage current analog-digital into a leakage current value by using a data analysis processing module;
analyzing a preset threshold section where the leakage current value is located by using a data analysis processing module;
if the leakage current value is smaller than the early warning threshold value, the data processing module uploads the leakage current value and the on-off state to a leakage monitoring platform cloud server in real time;
if the leakage current value is greater than or equal to the early warning threshold value and smaller than the trip threshold value, the data analysis processing module sends a first command signal to an early warning device, the early warning device sends an early warning signal according to the first command signal, meanwhile, the leakage current value and the switch state are uploaded to a leakage monitoring platform cloud server, and the low-voltage circuit continues to normally operate after the signals are reset;
and if the leakage current value is greater than or equal to the tripping threshold value, the data analysis processing module sends a second command signal to the switch tripping module, and the switch tripping module performs a switching-off action according to the second command signal.
7. The electrical leakage safety monitoring method according to claim 6, wherein after the switch trip module controls the low-voltage switch to perform the opening action, the method further comprises:
the switch state monitoring module monitors the state of the low-voltage switch, transmits information to the data analysis processing module and judges whether the switching-off is successful;
and if the low-voltage switch is not successfully switched off, the data analysis processing module continuously sends a second command signal to the switch tripping module, and the switch tripping module continuously performs switching-off action according to the second command signal.
8. The electrical leakage safety monitoring method according to claim 7, wherein after the switch trip module controls the low-voltage switch to complete opening, the method further comprises:
after the preset time, the switch tripping module controls the low-voltage switch to carry out closing action,
the switch state monitoring module monitors whether the low-voltage switch completes the switching-on action or not,
if the low-voltage switch is successfully switched on, the low-voltage circuit is judged to normally operate,
and if the low-voltage switch is not successfully switched on, judging that the low-voltage switch is permanently tripped.
9. The electrical leakage safety monitoring method according to claim 8, wherein after determining that the low voltage switch is permanently tripped, the method further comprises:
the electric leakage current value stored by the electric leakage monitoring platform cloud server is 0;
and after the mobile terminal acquires that the leakage current value is 0 and lasts for a preset time from the leakage monitoring platform cloud server, the mobile terminal sends information of permanent tripping to operation and maintenance personnel.
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