CN111398740A - Low-voltage power distribution network electricity stealing leakage detection device, monitoring system and monitoring method - Google Patents
Low-voltage power distribution network electricity stealing leakage detection device, monitoring system and monitoring method Download PDFInfo
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- CN111398740A CN111398740A CN202010355237.7A CN202010355237A CN111398740A CN 111398740 A CN111398740 A CN 111398740A CN 202010355237 A CN202010355237 A CN 202010355237A CN 111398740 A CN111398740 A CN 111398740A
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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
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
Abstract
The invention relates to a low-voltage distribution network electricity stealing leakage detection device, a monitoring system and a monitoring method. A low voltage distribution network electricity theft detection device comprising: the device comprises a controller, a communicator, a current sampler, an image collector, a GPS (global positioning system) positioner, a fault recorder, a memory and a power supply; the controller is used for receiving the current data collected by the current sampler, the image data collected by the image collector, the wave recording data collected by the fault wave recorder and the communication information transmitted by the communicator, and transmitting the communication information through the communicator. According to the low-voltage distribution network electricity stealing detection device, the monitoring system and the monitoring method, the low-voltage distribution network electricity stealing monitoring system and the monitoring method based on edge calculation are used for realizing quick and accurate detection and real-time positioning of electricity stealing, data collection, processing and analysis are all the detection devices provided by the invention, power grid resources are not occupied, and the requirements of intelligent application are met.
Description
Technical Field
The invention relates to the field of power distribution network monitoring, in particular to a low-voltage power distribution network electricity stealing detection device, a low-voltage power distribution network electricity stealing monitoring system and a low-voltage power distribution network electricity stealing monitoring method.
Background
The electricity phenomenon is stolen very seriously to national grid electric power company feedback platform district couple, leads to platform district line loss to be high and not down, and enterprise economic benefits receives the harm, and the couple is stolen the electricity condition and is taken place occasionally, is difficult to in time discover to deal with, causes the benefit of electric wire netting enterprise to run off. The monitoring and the investigation are carried out by lacking effective technical means for a long time, and a lot of troubles are brought to power grid enterprises.
Secondly, at present, line electric leakage is a pain point and a difficulty which troubles the safe and economic operation of a low-voltage rural distribution network, the traditional leakage current investigation mainly depends on the experience of workers, time and labor are wasted, and the situation of hidden and accidental electric leakage is difficult to discover. The monitoring and the investigation are carried out by lacking effective technical means for a long time, and a lot of troubles are brought to power grid enterprises.
The power supply business rule carries out responsibility regulation on punishment of the electricity stealing behavior, and the device can provide scientific and powerful support for the implementation of the rule when being put into use.
The method comprises the following steps that (1) manual line patrol inspection is time-consuming and labor-consuming, and difficult to search and high in pressure of operation and maintenance personnel, and (2) manual line patrol inspection is poor in real-time performance and incapable of quickly and accurately positioning electricity stealing points.
Patent document Z L201910708050.8 discloses an edge calculation method and device for preventing electricity stealing based on the ubiquitous power internet of things, which starts from the abnormality of a magnetic field and further judges whether an electricity stealing behavior occurs, and data to be detected and calculated are still complex, slow in data updating, poor in real-time performance, and incapable of being processed and positioned in time.
Therefore, the present invention is not satisfactory, and the inventors are in need of further development and innovation.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a low-voltage distribution network electricity stealing detection device, a monitoring system and a monitoring method, which can acquire current data of a line and image data of the surrounding environment and can quickly determine the position of electricity stealing under the condition of electricity stealing.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low voltage distribution network electricity theft detection device comprising: the device comprises a controller, a communicator, a current sampler, an image collector, a GPS (global positioning system) positioner, a fault recorder, a memory and a power supply;
the current sampler is used for detecting line current data and sending the current data to the controller;
the image collector is used for collecting surrounding image data and sending the image data to the controller;
the communicator is used for receiving and sending communication information according to the instruction of the controller;
the GPS positioner transmits positioning information to the controller;
the fault recorder is used for recording faults according to the instructions of the controller and feeding fault recording data back to the controller;
the memory is used for storing a characteristic database and is connected with the controller;
the controller is used for receiving the current data collected by the current sampler, the image data collected by the image collector, the wave recording data collected by the fault wave recorder and the communication information transmitted by the communicator, and transmitting the communication information through the communicator;
the power supply is used for respectively supplying power to the controller, the communicator, the image collector and the fault recorder.
Preferably, the low-voltage distribution network electricity stealing detection device further comprises a temperature and humidity sensor for detecting temperature and humidity data of the surrounding environment and transmitting the temperature and humidity data to the controller.
Preferably, the communicator is a 4G module.
Preferably, in the low-voltage distribution network electricity stealing detection device, the power supply supplies power for solar energy or power taking and clamping.
A low voltage distribution network leakage monitoring system comprising: the system comprises a monitoring master station, a total measuring device, a plurality of sub-measuring devices and a plurality of executing devices;
the total measuring device and the branch measuring device both adopt the detecting device;
the branch measuring device is arranged in each branch line and used for collecting and sending current data and image data of the branch line to the total measuring device;
the main measuring device is arranged in a bus of the station area, is used for carrying out current data detection and fault recording on the bus of the station area, simultaneously receives current data and image data measured by the plurality of sub measuring devices, and is communicated with the monitoring master station;
the execution device is used for indicating the electricity stealing information according to the instruction of the detection master station;
and the monitoring master station is used for communicating with the total measurement device and sending a control instruction to the execution device.
Preferably, the low-voltage distribution network electricity stealing and leakage monitoring system is characterized in that a plurality of branch measuring devices are respectively arranged for a switch cabinet line, a branch box line and a household line according to installation positions and are arranged according to a tree-shaped topological structure;
the branch testing device is arranged on the line of the home and used for collecting and sending current data and image data of the line of the home to the branch testing device arranged on the branch box line connected with the line of the home;
the branch testing device is arranged on the branch box circuit and used for acquiring current data and image data of the branch box circuit, receiving detection data of the branch testing device of the line to the home connected with the branch box circuit and sending the detection data to the branch testing device of the switch cabinet circuit connected with the branch box;
install divide on the cubical switchboard circuit and survey the device for detect this cubical switchboard circuit's current data and image data, and receive the branch case circuit of being connected with this cubical switchboard branch case circuit's that survey the device's detection data, and send and be connected with this cubical switchboard on the platform district bus in the total survey device.
A low-voltage distribution network electricity stealing monitoring method for the monitoring system comprises the following steps:
s1, data acquisition: the plurality of branch measuring devices respectively detect the branch measuring current data of the electricity consumption of the line of the user at a preset frequency and send the data to the main measuring device; the total measuring device detects the total measuring current data of the electricity consumption of the local area at a preset frequency, and simultaneously collects the measuring current data transmitted by a plurality of the measuring devices in the local area;
s2, the total measuring device carries out current synthesis calculation, whether the calculated current value of the synthesis calculation is larger than a first preset value or not is judged, and if yes, the step S4 is executed; if not, go to step S3;
s3, the total test device detects whether there is abnormal current in the circuit, if yes, step S4 is executed; if not, go to step S1;
s4, the total measurement device judges whether the current difference value of the total measurement data and the sum of the plurality of measurement data is larger than a second preset value, if yes, the step S5 is executed; if not, go to step S1;
s5, characteristic judgment: the total measurement device starts current recording, compares the current recording with load characteristic data, judges whether the total measurement current data is electricity stealing characteristic data or electric leakage characteristic data, and if the total measurement current data is the electricity stealing characteristic data, executes the step S6; if the leakage characteristic data is the leakage characteristic data, executing step S7;
s6, image positioning: the plurality of branch measuring devices respectively acquire image data of the environment, acquire and send the image data to the total measuring device, the total measuring device summarizes the image data and determines the electricity stealing position, and the step S8 is executed;
s7, data positioning: the total measurement device executes multilevel data comparison operation, determines the electric leakage position and executes the step S8;
s8, the electricity stealing position or the electricity leakage position is transmitted to the monitoring main station, and the monitoring main station pushes the information of the electricity stealing position or the electricity leakage position to an execution device.
Preferably, in the method for monitoring leakage of a low-voltage distribution network, the multistage data comparison operation is:
the general testing device collects all the detection data sent by the branch testing devices arranged on the switch cabinet lines, compares the current data of all the branches of the tree-shaped topological structure respectively, and locates the electric leakage position.
Preferably, in the method for monitoring leakage of a low-voltage distribution network, the abnormal current is: and calculating the average current value of the current detected within 10-50ms, wherein the current value detected this time exceeds the average current value 12A or above to be the abnormal current.
According to the preferred method for monitoring the electricity stealing leakage of the low-voltage distribution network, the first preset value and the second preset value are adjusted up and down along with the rise of the environmental temperature and humidity; and the data tables of the first preset value and the second preset value which change along with the temperature and the humidity are respectively stored in a memory of the total measuring device and a memory of the separate measuring device.
Compared with the prior art, the low-voltage distribution network electricity stealing detection device, the monitoring system and the monitoring method provided by the invention have the advantages that the low-voltage distribution network electricity stealing monitoring system and the monitoring method based on edge calculation realize the rapid and accurate detection and real-time positioning of electricity stealing, the data acquisition, processing and analysis are the detection device provided by the invention, the power grid resources are not occupied, and the requirements of intelligent application are met.
Drawings
FIG. 1 is a block diagram of an apparatus for detecting electrical leakage according to the present invention;
fig. 2 is a block diagram of the structure of the system for monitoring leakage of electricity provided by the present invention;
fig. 3 is a schematic diagram of an embodiment of a tree topology of a system for monitoring leakage current according to the present invention;
fig. 4 is a flowchart of a low-voltage distribution network electricity theft monitoring method provided by the invention.
GPS (Global Positioning System), Flash (Flash Memory)
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to fig. 1, the present invention provides a device for detecting leakage of a low voltage distribution network, including: a controller 51, a communicator 52, a current sampler 53, an image collector 54, a GPS locator 55, a fault recorder 56, a memory 57 and a power supply 58;
the current sampler 53 is used for detecting line current data and sending the current data to the controller 51; the preferred scheme of the current sampler 53 is a current transformer, and more preferably a sleeve-type current transformer;
the image collector 54 is configured to collect surrounding image data and send the image data to the controller 51; the image collector 54 is mainly used for collecting images of the surrounding environment, and preferably adopts a digital camera, which can convert image data into digital data and transmit the digital data to the controller 51, and the controller 51 further processes the digital data;
the communicator 52 is configured to receive and transmit communication information according to an instruction of the controller 51; the communicator 52 may be a wired communicator and a wireless communicator, and as a preferable scheme, the communicator 52 in this embodiment is a wireless communicator, and meanwhile, an independent communication protocol needs to be matched during communication; the communication protocol is not limited in this embodiment, as long as data can be transmitted without error or transmission failure;
the GPS positioner 55 transmits positioning information to the controller 51; since a part of the electricity theft detection device is installed on the service line, but the service line is not completely determined, a positioning device needs to be installed for positioning and transmitting the positioning information to the controller 51;
the fault recorder 56 is configured to record a fault according to an instruction of the controller 51, and feed back fault recording data to the controller 51; the fault recorder 56 is not limited in this embodiment,
the memory 57 is used for storing a characteristic database and is connected with the controller 51; the memory 57 is preferably a flash memory;
the Controller 51 is used for receiving the current data collected by the current sampler 53, the image data collected by the image collector 54, the recording data collected by the fault recorder 56 and the communication information transmitted by the communicator 52, and transmitting the communication information through the communicator 52, wherein the Controller 51 is preferably a logic Controller 51, and the logic Controller 51 is preferably a P L C (Programmable L logic Controller) Controller 51;
the power supply 58 is configured to respectively supply power to the controller 51, the communicator 52, the image collector 54, and the fault recorder 56. Specifically, the power source 58 for electricity stealing may be an independent power source or a commercial power source; the independent power supply is a rechargeable lithium battery or solar power supply, and the mains supply is connected to a power grid line for supplying power; in the present embodiment, the first and second electrodes are,
specifically, the electricity stealing detection device is mainly used for detecting the current of the line and recording the fault wave under the condition that the line has electricity stealing. In the use process of the electricity stealing detection device, one part of the electricity stealing detection device is used for a main detection device, the other part of the electricity stealing detection device is used for a branch detection device, and the main detection device is used for summarizing detection data of the branch detection device and carrying out corresponding processing, so that a controller 51 of the electricity stealing detection device needs to have a certain logic processing function; of course, the present invention is not limited to the above-described exemplary embodiments, and the present invention may be applied to any other exemplary embodiments.
In the using process, the current sampler 53 detects current value data of a line in real time and transmits the current value data to the controller 51, the controller 51 further judges whether abnormal current data exists, if so, the fault recorder 56 is started to record a fault and feeds the record data back to the controller 51, the controller 51 judges whether the situation of electric leakage exists according to the characteristic database, if so, the controller 51 drives the image collector 54 to collect image data of the surrounding environment, the controller 51 judges whether the situation of electric leakage exists in the environment of the line section and reports the situation of analysis, or the electric leakage detection device of the section does not judge, and after uploading the detected data, the upper computer judges whether the situation of electric leakage exists. The upper computer can be a server or a superior electric leakage detection device, namely the total detection device.
Preferably, in this embodiment, the system further includes a temperature and humidity sensor, configured to detect temperature and humidity data of the surrounding environment, and transmit the temperature and humidity data to the controller 51. Specifically, because the change in the temperature and humidity of the environment affects the leakage amount of the line leakage, the controller 51 may determine whether there is a situation of electricity theft according to the temperature and humidity of the environment.
Preferably, in this embodiment, the communicator 52 is a 4G module. Specifically, for the convenience of installation, the communication method of the communicator 52 is wireless communication, preferably 4G module communication, and further, a connection destination can be selected or set, which contributes to the construction of a communication network. The specific 4G module is not particularly limited as long as the above functions are accomplished.
Preferably, in this embodiment, the power source 58 supplies power to solar energy or to a power-taking clamp. The solar power supply is characterized in that the solar power generation device supplies power to the device, and the power taking clamp takes power to supply power to the device for obtaining electric energy in a power grid line. In a further embodiment, the power taking mode of the power taking clamp is that a puncture thimble takes power.
Example 2
Referring to fig. 2 to 4, the present invention also provides a system for monitoring leakage of a low voltage distribution network, including: the system comprises a monitoring main station 1, a total measuring device 2, a plurality of sub-measuring devices 3 and a plurality of executing devices 4;
the total measuring device 2 and the branch measuring device 3 both adopt the detecting device;
the branch measuring device 3 is arranged in each branch line and is used for collecting and sending current data and image data of the branch line to the total measuring device 2;
the main measuring device 2 is arranged in a bus of the station area, is used for carrying out current data detection and fault recording on the bus of the station area, simultaneously receives current data and image data measured by the sub measuring devices 3, and is communicated with the monitoring main station 1;
the execution device 4 is configured to indicate the electricity stealing information according to the instruction of the detection master station; the executive device 4 is a manually-used device, and the monitoring central station sends a corresponding instruction to the executive device 4 to indicate electricity stealing information, wherein the electricity stealing information comprises information such as whether a circuit is normal, whether electricity stealing and leakage occurs, and the position of electricity stealing and leakage;
and the monitoring master station 1 is used for communicating with the total measurement device 2 and sending a control instruction to the execution device 4. The monitoring central station can be a server with a display, a host computer and other devices, and can also be other equipment with similar functions.
The total measuring device 2 and the partial measuring device 3 are different in that: firstly, in a communication state, the total measurement device 2 is in communication with a plurality of the branch measurement devices 3, and the branch measurement devices 3 are only in communication with the total measurement device 2; the second is to monitor the line, in general, the total measurement device 2 detects the line of the whole station area, the station area generally uses a three-phase four-wire (three fire and one zero) line, the branch measurement device 3 detects the line of the home, and the line of the home generally uses a two-phase two-wire (one fire and one zero) line, so the current sampler 53 in the total measurement device 2 needs to detect the current of the four lines at the same time, and the current sampler in the branch measurement device 3 needs to detect the current of the two lines. Meanwhile, the controller 51 in the sub-measurement device 3 does not perform logic analysis of data, and all logic analysis parts are delivered to the controller 51 of the main measurement device 2 for processing.
Correspondingly, please refer to fig. 4, the present invention further provides a low voltage distribution network electricity stealing monitoring method for the monitoring system, comprising the steps of:
s1, data acquisition: the plurality of branch measuring devices 3 respectively detect the branch measuring current data of the electricity consumption of the line of the user at a preset frequency and send the data to the main measuring device 2; the total measuring device 2 detects the total measuring data of the electricity consumption of the local area at a preset frequency, and simultaneously collects the measuring data transmitted by a plurality of the measuring devices 3 in the local area;
s2, the total measuring device 2 carries out current synthesis calculation, whether the calculated current value of the synthesis calculation is larger than a first preset value or not is judged, and if yes, the step S4 is executed; if not, go to step S3; this step is used to determine whether there is a possibility of electrical leakage, and finally determine whether electrical leakage needs to be qualitatively determined in step S5; the formula of the synthesis calculation is:
IA+IB+IC+IN＝I0；
wherein, IA、IB、IC、INThe current values of A, B, C, N four phases, A, B, C three phases and N phases are current values of live wire and zero wire, respectively, and the directions of the currents are different, so that if I is detectedA、IB、ICIn the case of positive values, INThen is negative, and the value I is obtained after adding0A calculated current value calculated for the synthesis; however, in normal situations, there is a certain leakage situation, so that the first preset value needs to be set, and when the calculated value is greater than the first preset value, it is determined that the leakage situation may occur;
s3, the total test device 2 detects whether there is abnormal current in the circuit, if yes, the step S4 is executed; if not, go to step S1; the abnormal current is a rapidly changing current; the rapid change is that the current value measured at this time exceeds the average current value in a certain time before the current measurement by a certain value, namely the rapid change is obtained; the certain time and the certain data are specifically set according to actual conditions; it should be noted that the electricity stealing judgment in this step is a preliminary judgment, and is finally determined as the criterion for the identification in step S5;
s4, the total measurement device 2 judges whether the current difference value of the total measurement data and the sum of a plurality of the measurement data is larger than a second preset value, if yes, the step S5 is executed; if not, go to step S1; specifically, the calculation formula of the current difference is as follows:
wherein, IzA total measured current value measured for the total measuring device 2; i isnDetecting a branch current value for the nth branch line (the sequence of the nth branch line is not limited, as long as the currents of all the branch lines are always added together, and the current data of each branch line only participates in calculation once) in the N branch lines; i isjIs the current difference;
s5, characteristic judgment: the total measuring device 2 starts current wave recording, compares the current wave recording with load characteristic data, judges whether the total measuring current data is electricity stealing characteristic data or electric leakage characteristic data, and if the total measuring current data is the electricity stealing characteristic data, executes the step S6; if the leakage characteristic data is the leakage characteristic data, executing step S7; the electricity stealing characteristic is an abnormal current in a short time caused by the instant starting of the electricity stealing equipment, and the state of stabilizing at a certain current value after a certain time is the electricity stealing characteristic; the electricity stealing feature data is a set of electricity stealing feature sets of different types; the leakage characteristic data comprises continuous leakage characteristic data, short-time leakage characteristic data and electric shock leakage characteristic data;
s6, image positioning: the plurality of branch measuring devices 3 respectively acquire image data of the environment, acquire and send the image data to the total measuring device 2, the total measuring device 2 collects the image data and determines the electricity stealing position, and step S8 is executed;
s7, data positioning: the total testing device 2 executes multi-level data comparison operation, determines the electric leakage position, and executes the step S8; specifically, the multi-level data comparison is to perform summary analysis on data of devices installed at different positions;
s8, transmitting the electricity stealing position or the electricity leakage position to the monitoring main station 1, and pushing the electricity stealing position or the electricity leakage position information to an execution device 4 by the monitoring main station 1.
Preferably, in this embodiment, the abnormal current is: and calculating the average current value of the current detected within 10-50ms, wherein the current value detected this time exceeds the average current value 12A or above to be the abnormal current. Specifically, the predetermined frequency is preferably 4000Hz, that is, 4000 times of current values are detected within 1s, an average current value of the current within 10-50ms is calculated, and if the current value detected this time exceeds the average current value 12A, the current value can be determined as an abnormal current. In general, the current for electricity stealing is obvious, and the current changes from a few a or more than a dozen a, but the condition of electricity leakage is complex, and the current is data of mA level, therefore, in the method provided by the invention, the current of each branch line in the local area is synthesized and calculated, whether the condition of electricity leakage occurs or not is determined, then the condition of electricity stealing is judged, if not, no operation is performed, and if one of the conditions occurs, the positioning determination is started.
Specifically, the electricity stealing feature data set includes:
turning on an air conditioner: the abnormal current is 44A, the duration time of the sudden change current is 280ms, and the current after the steady state is 6A;
starting a single-phase motor: the abnormal current is 26A, the duration time of the sudden change current is 240ms, and the steady-state post-current is 9A;
opening the fishpond oxygen conveyor: the abnormal current is 40A, the duration time of the sudden change current is 30ms, and the steady-state post-current is 5A;
heating the water kettle: the abnormal current was 12A, the sudden current duration was 30ms, and the post-steady state current was 12A.
The above four types are only some exemplary electricity stealing feature data, and are not limited, and in a specific implementation, the electricity stealing feature data set may include electricity stealing feature data of a plurality of devices.
The abnormal current value generated by the electricity stealing behavior in the general case is more than 12A, therefore, the current value detected this time can be preliminarily determined as long as the current value exceeds 12A or more than the average current value, but after the current value is determined more finely, two-step determination can be used, wherein the first step determines whether the current value detected this time exceeds 12A or more than the average current value, and the second step determines whether the current value detected this time exceeds 5A or more than the average current value in the steady state condition.
As a preferable scheme, in this embodiment, the first preset value and the second preset value are adjusted up and down along with the rise of the ambient temperature and humidity; data tables of the first preset value and the second preset value which change along with the temperature and the humidity are respectively stored in the memory 57 of the total measuring device 2 and the memory 57 of the branch measuring device 3. The data table is obtained according to big data statistics or scientific research, and is not limited herein, and generally, the data table in which the corresponding first preset value and the second preset value change with the temperature and humidity only needs to be stored in the total measuring device 2 and the separate measuring device 3. It should be noted that the data table may be a linear table, or may be a numerical table, and is not limited herein.
Please refer to fig. 3, as a preferred solution, in the present embodiment, a plurality of the branch testing devices 3 are respectively installed for a switch cabinet line, a branch box line and a service line according to installation positions, and are arranged according to a tree topology structure; the installation is specifically installed between the upper level position and the current level position of the corresponding installation position in the figure, or installed at the position shown by the arrow in figure 3;
the branch testing device 3 is arranged on the line of the house and used for collecting and sending current data and image data of the line of the house to the branch testing device 3 arranged on the branch box line connected with the line of the house;
the branch testing device 3 is arranged on the branch box circuit and is used for acquiring current data and image data of the branch box circuit, receiving detection data of the branch testing device 3 of the service line connected with the branch box circuit and sending the detection data to the branch testing device 3 of the switch cabinet circuit connected with the branch box;
install branch on the cubical switchboard circuit surveys device 3 for detect this cubical switchboard circuit's current data and image data, and receive the branch case circuit of being connected with this cubical switchboard branch survey device 3's detection data, and send and be connected with this cubical switchboard on the platform district bus in the total survey device 2.
Preferably, in this embodiment, the multi-level data comparison operation is:
the total testing device 2 collects all the detection data sent by the branch testing devices 3 which are arranged on the switch cabinet lines, compares the current data of all the branches of the tree-shaped topological structure respectively, and locates the leakage position. The multi-stage data comparison mainly aims at the determination of specific leakage positions, can clearly master the current condition of the line of each branch, and carries out comparison step by step, or uses the synthetic calculation step by step for determination, or starts current recording step by step, and then carries out judgment on load characteristic data, or only needs the total measurement device 2 to carry out synthetic calculation step by step on each branch, and finally determines the leakage position.
Preferably, in this embodiment, the executing device 4 is a mobile phone, which is convenient to use and quick in response.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. A low voltage distribution network electric leakage detection device, characterized by comprising: the device comprises a controller, a communicator, a current sampler, an image collector, a GPS (global positioning system) positioner, a fault recorder, a memory and a power supply;
the current sampler is used for detecting line current data and sending the current data to the controller;
the image collector is used for collecting surrounding image data and sending the image data to the controller;
the communicator is used for receiving and sending communication information according to the instruction of the controller;
the GPS positioner transmits positioning information to the controller;
the fault recorder is used for recording faults according to the instructions of the controller and feeding fault recording data back to the controller;
the memory is used for storing a characteristic database and is connected with the controller;
the controller is used for receiving the current data collected by the current sampler, the image data collected by the image collector, the wave recording data collected by the fault wave recorder and the communication information transmitted by the communicator, and transmitting the communication information through the communicator;
the power supply is used for respectively supplying power to the controller, the communicator, the image collector, the GPS positioner and the fault recorder.
2. The low-voltage distribution network electricity theft detection device of claim 1, further comprising a temperature and humidity sensor for detecting temperature and humidity data of the surrounding environment and transmitting the temperature and humidity data to the controller.
3. The low voltage distribution network electricity theft detection device of claim 1, wherein the communicator is a 4G module.
4. The low voltage distribution network electricity theft detection device of claim 1, wherein the power supply is solar powered or power-taking clamp powered.
5. A low voltage distribution network electric leakage monitoring system, comprising: the system comprises a monitoring master station, a total measuring device, a plurality of sub-measuring devices and a plurality of executing devices;
the total measuring device and the branch measuring device both adopt the detecting device of any one of claims 1 to 4;
the branch measuring device is arranged in each branch line and used for collecting and sending current data and image data of the branch line to the total measuring device;
the main measuring device is arranged in a bus of the station area, is used for carrying out current data detection and fault recording on the bus of the station area, simultaneously receives current data and image data measured by the plurality of sub measuring devices, and is communicated with the monitoring master station;
the execution device is used for indicating the electricity stealing information according to the instruction of the detection master station;
and the monitoring master station is used for communicating with the total measurement device and sending a control instruction to the execution device.
6. The system for monitoring the electric leakage of the low-voltage distribution network according to claim 5, wherein a plurality of the branch testing devices are respectively installed for a switch cabinet line, a branch box line and a service line according to installation positions and are arranged according to a tree topology structure;
the branch testing device is arranged on the line of the home and used for collecting and sending current data and image data of the line of the home to the branch testing device arranged on the branch box line connected with the line of the home;
the branch testing device is arranged on the branch box circuit and used for acquiring current data and image data of the branch box circuit, receiving detection data of the branch testing device of the line to the home connected with the branch box circuit and sending the detection data to the branch testing device of the switch cabinet circuit connected with the branch box;
install divide on the cubical switchboard circuit and survey the device for detect this cubical switchboard circuit's current data and image data, and receive the branch case circuit of being connected with this cubical switchboard branch case circuit's that survey the device's detection data, and send and be connected with this cubical switchboard on the platform district bus in the total survey device.
7. A method for monitoring the electricity theft of a low voltage distribution network, used in a monitoring system according to any of claims 5 to 6, characterized in that it comprises the steps of:
s1, data acquisition: the plurality of branch measuring devices respectively detect the branch measuring current data of the electricity consumption of the line of the user at a preset frequency and send the data to the main measuring device; the total measuring device detects the total measuring current data of the electricity consumption of the local area at a preset frequency, and simultaneously collects the measuring current data transmitted by a plurality of the measuring devices in the local area;
s2, the total measuring device carries out current synthesis calculation, whether the calculated current value of the synthesis calculation is larger than a first preset value or not is judged, and if yes, the step S4 is executed; if not, go to step S3;
s3, the total test device detects whether there is abnormal current in the circuit, if yes, step S4 is executed; if not, go to step S1;
s4, the total measurement device judges whether the current difference value of the total measurement data and the sum of the plurality of measurement data is larger than a second preset value, if yes, the step S5 is executed; if not, go to step S1;
s5, characteristic judgment: the total measurement device starts current recording, compares the current recording with load characteristic data, judges whether the total measurement current data is electricity stealing characteristic data or electric leakage characteristic data, and if the total measurement current data is the electricity stealing characteristic data, executes the step S6; if the leakage characteristic data is the leakage characteristic data, executing step S7;
s6, image positioning: the plurality of branch measuring devices respectively acquire image data of the environment, acquire and send the image data to the total measuring device, the total measuring device summarizes the image data and determines the electricity stealing position, and the step S8 is executed;
s7, data positioning: the total measurement device executes multilevel data comparison operation, determines the electric leakage position and executes the step S8;
s8, the electricity stealing position or the electricity leakage position is transmitted to the monitoring main station, and the monitoring main station pushes the information of the electricity stealing position or the electricity leakage position to an execution device.
8. The method for monitoring leakage of low voltage distribution network according to claim 7, wherein the multi-level data comparison operation is:
the general testing device collects all the detection data sent by the branch testing devices arranged on the switch cabinet lines, compares the current data of all the branches of the tree-shaped topological structure respectively, and locates the electric leakage position.
9. The method for monitoring leakage of low-voltage distribution network according to claim 7, wherein the abnormal current is: and calculating the average current value of the current detected within 10-50ms, wherein the current value detected this time is more than 12A or more than the average current value to be the abnormal current.
10. The method for monitoring leakage of a low-voltage distribution network according to claim 7, wherein the first preset value and the second preset value are adjusted up and down as the temperature and humidity of the environment rise; and the data tables of the first preset value and the second preset value which change along with the temperature and the humidity are respectively stored in a memory of the total measuring device and a memory of the separate measuring device.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113642858A (en) * | 2021-07-29 | 2021-11-12 | 河南北斗电气设备有限公司 | Intelligent power utilization management system based on cloud platform database |
| CN113933585A (en) * | 2021-11-26 | 2022-01-14 | 长沙理工大学 | Detection method for zero-breaking electricity-stealing users in electricity leakage platform area based on Euclidean distance |
| CN114113915A (en) * | 2021-12-09 | 2022-03-01 | 广东电网有限责任公司 | Low-voltage transformer area electric leakage detection method, system, equipment and storage medium |
| CN116699318A (en) * | 2023-07-27 | 2023-09-05 | 成都汉度科技有限公司 | Electric leakage detection method and system based on edge calculation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113642858A (en) * | 2021-07-29 | 2021-11-12 | 河南北斗电气设备有限公司 | Intelligent power utilization management system based on cloud platform database |
| CN113642858B (en) * | 2021-07-29 | 2024-02-27 | 河南北斗电气设备有限公司 | Intelligent electricity management system based on cloud platform database |
| CN113933585A (en) * | 2021-11-26 | 2022-01-14 | 长沙理工大学 | Detection method for zero-breaking electricity-stealing users in electricity leakage platform area based on Euclidean distance |
| CN114113915A (en) * | 2021-12-09 | 2022-03-01 | 广东电网有限责任公司 | Low-voltage transformer area electric leakage detection method, system, equipment and storage medium |
| CN116699318A (en) * | 2023-07-27 | 2023-09-05 | 成都汉度科技有限公司 | Electric leakage detection method and system based on edge calculation |
| CN116699318B (en) * | 2023-07-27 | 2023-10-20 | 成都汉度科技有限公司 | Electric leakage detection method and system based on edge calculation |
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