CN117110702A - Electricity larceny detection system - Google Patents

Abstract

The invention provides an electricity larceny detection system. The system comprises: the power data acquisition device is arranged on the primary side of the power consumer transformer, and is used for acquiring the primary side power consumption data of the power consumer transformer and transmitting the primary side power consumption data to the power data receiver arranged on the secondary side of the transformer in a wireless transmission mode; the electric energy data receiver is also used for detecting external interference information of the electric energy data receiver, and when the external interference information exists, the electric energy data receiver sends out alarm sound or sends out alarm information to the main control computer in a wireless transmission mode; the acquisition terminal is used for acquiring primary side electricity utilization data received by the electric energy data receiver, acquiring secondary side electricity utilization data of the transformer acquired by the electric energy meter and uploading the data to the main control computer in a wireless transmission mode; and the main control machine is used for judging whether the electricity stealing behavior exists in the power user according to the received primary side electricity utilization data and the secondary side electricity utilization data. The invention can accurately judge whether the electricity stealing behavior exists in the power consumer.

Description

Electricity larceny detection system

Technical Field

The invention relates to the technical field of electricity larceny prevention, in particular to an electricity larceny detection system.

Background

Along with the rapid development of economy, the electric power demand is also continuously increased, the electric power sales market is continuously expanded, intelligent electric meters are widely applied to the electric power field for metering conveniently and accurately and collecting corresponding electric charges, but partial electric power users are driven by benefits, various different means are adopted for stealing electricity, the electric quantity read in the electric meters is greatly different from the actual electric quantity, the normal operation of an electric network is interfered, and the economic benefits of the electric power market are seriously damaged, so that it is very important to detect whether the electricity stealing behavior exists.

At present, various electricity larceny detection methods exist, such as power personnel do not regularly perform electricity inspection, ceny is performed on electricity consumption conditions of all power consumers, metering devices such as electricity meters of the power consumers are inspected, but the methods all require a large amount of manpower, and the electricity larceny detection cannot be continuously performed, so that it is difficult to ensure that the consumers always use electricity normally.

Disclosure of Invention

The embodiment of the invention provides a power stealing detection system for accurately judging whether a power user has power stealing behavior.

In a first aspect, an embodiment of the present invention provides an electricity theft detection system, including:

The power data acquisition device is arranged on the primary side of the power consumer transformer, and is used for acquiring the primary side power consumption data of the power consumer transformer and transmitting the primary side power consumption data to the power data receiver arranged on the secondary side of the power consumer transformer in a wireless transmission mode; the electric energy data receiver is also used for detecting external interference information of the electric energy data receiver, and when the external interference information exists, the electric energy data receiver sends out alarm sound or sends out alarm information to the main control computer in a wireless transmission mode;

the acquisition terminal is used for acquiring the primary side electricity utilization data received by the electric energy data receiver, acquiring the secondary side electricity utilization data of the power consumer transformer acquired by the electric energy meter and uploading the secondary side electricity utilization data to the main control computer in a wireless transmission mode; and the main control machine is used for judging whether the electricity stealing behavior exists in the power user according to the received primary side electricity utilization data and the secondary side electricity utilization data.

In one possible implementation, the electric energy data acquirer comprises a current transformer module, a current processing module, a circuit control module, a timing module, a singlechip and a first communication module;

the input end of the current transformer module is used for collecting primary side current data of the power consumer voltage device; the output end of the current transformer module is connected with the input end of the current processing module and is used for converting primary side current data into secondary transformation ratio current and transmitting the secondary transformation ratio current to the current processing module;

The signal output end of the current processing module is connected with the signal input end of the singlechip and is used for converting the received secondary transformation ratio current into a voltage signal and then sending the voltage signal to the singlechip; the electric energy output end of the current processing module is connected with the input end of the circuit control module and is used for providing electric energy for the circuit control module;

the output end of the circuit control module is connected with the electric energy input end of the singlechip and is used for providing electric energy for the singlechip;

the output end of the singlechip is connected with the input end of the first communication module and is used for calculating the instantaneous power of the primary side of the transformer according to the received voltage signal to obtain primary side power utilization data and transmitting the primary side power utilization data to the first communication module;

the output end of the first communication module is used for sending the primary side power consumption data to the electric energy data receiver;

the input end of the timing module is used for acquiring time setting information; the output end of the timing module is connected with the input end of the singlechip and is used for sending a restarting signal to the singlechip every preset time, and the singlechip is restarted according to the restarting signal.

In one possible implementation, the current processing module includes a protection unit, a conversion unit, a charging unit, and an energy storage unit;

The input end of the protection unit is connected with the output end of the current transformer module and is used for receiving the secondary transformation ratio current;

the output end of the protection unit is connected with the input end of the conversion unit and is used for limiting the potential of the output end of the protection unit and transmitting the secondary transformation ratio current after limiting the potential to the conversion unit;

the output end of the conversion unit is used as a signal output end of the current processing module;

the input end of the charging unit is connected with the output end of the protection unit and is used for rectifying the alternating current output by the protection unit; the input end of the charging unit is also connected with the output end of the singlechip and is used for charging and discharging according to the instruction of the singlechip; the output end of the charging unit is connected with the input end of the energy storage unit and is used for discharging to the energy storage unit so that the energy storage unit can store energy;

the output end of the energy storage unit is connected with the input end of the circuit control module and is used for providing electric energy for the circuit control module; the output end of the energy storage unit is also connected with the signal input end of the singlechip and is used for transmitting voltage change signals to the singlechip so that the singlechip can send charge and discharge instructions according to the voltage change signals.

In one possible implementation, the protection unit includes a diode D1, a diode D2, a diode D3, and a diode D4;

The anode of the diode D1 is connected with the cathode of the diode D2 in parallel and then is respectively connected with the output end of the current transformer module and the input end of the conversion unit;

the cathode of the diode D1 is connected with the anode of the diode D3, the anode of the diode D2 is connected with the cathode of the diode D4, and the cathode of the diode D3 and the anode of the diode D4 are connected in parallel and then are respectively connected with the input end of the charging unit and the input end of the conversion unit.

In one possible implementation, the conversion unit includes a conversion resistor R1, a conversion resistor R2, a current limiting resistor R3, a current limiting resistor R4, a capacitor C1, and a capacitor C2;

one end of the switching resistor R1 and one end of the switching resistor R2 which are connected in parallel are respectively connected with the output end of the protection unit and one end of the current-limiting resistor R3; the other end of the parallel connection of the conversion resistor R1 and the conversion resistor R2 is respectively connected with the output end of the protection unit and one end of the current-limiting resistor R4;

the other end of the current-limiting resistor R3 is respectively connected with the signal input end of the singlechip and one end of the capacitor C1;

the other end of the current-limiting resistor R4 is respectively connected with the signal input end of the singlechip and one end of the capacitor C2;

the other end of the capacitor C1 is connected with the other end of the capacitor C2 and then grounded.

In one possible implementation, the charging unit includes a rectifying diode Ds1, a rectifying diode Ds2, a rectifying diode Ds3, a rectifying diode Ds4, a charging diode Ds6, a charging diode Ds7, a charging diode Ds8, a charging diode Ds9, a charging diode Ds10, a charging diode Ds11, a resistor Rs1, and a MOS transistor Vs1;

The anode of the diode Ds1 is connected with the anode of the diode Ds3 and then grounded, and the cathode of the diode Ds1 is connected with the anode of the diode Ds2 and then connected with the protection unit; the cathode of the diode Ds3 is connected with the anode of the diode Ds4 and then is connected with the output end of the current transformer module;

the cathode of the diode Ds2 is connected with the cathode of the diode Ds4 and then is respectively connected with the anode of the diode Ds6, and the drain of the MOS tube is connected with the input end of the energy storage unit; the source electrode of the MOS tube is grounded;

the grid electrode of the MOS tube is respectively connected with the CTR pin of the singlechip and one end of the resistor Rs 1;

the other end of the resistor Rs1 is connected with the cathode of the diode Ds11 and then grounded;

the diode Ds6, the diode Ds7, the diode Ds8, the diode Ds9, the diode Ds10 and the diode Ds11 are sequentially connected in series, and the cathode of the diode Ds11 is also connected with the input end of the energy storage unit.

In one possible implementation, the energy storage unit includes a diode Ds5, a supercapacitor Cs4, a capacitor Cs3, a resistor Rs2, and a resistor Rs3;

the anode of the diode Ds5 is connected with the output end of the charging unit, and the cathode of the diode Ds5 is respectively connected with the anode of the supercapacitor Cs4, one end of the capacitor Cs3, one end of the resistor Rs2 and the input end of the circuit control module;

The negative electrode of the super capacitor Cs4 and the other end of the capacitor Cs3 are connected in parallel and then grounded;

one end of the resistor Rs3 is grounded; the other end of the resistor Rs3 is connected with the other end of the resistor Rs2 and then is connected with the signal input end of the singlechip.

In one possible implementation, the power data receiver includes a second communication module, a spread spectrum data storage module, a detection module, and a clock module;

the input end of the second communication module is used for receiving the primary side power utilization data sent by the power data acquirer;

the second communication module is connected with the expansion data storage module and is used for storing the primary side power consumption data into the expansion data storage module and acquiring the power consumption information of the power user from the expansion data storage module; the output end of the second communication module is used as the output end of the electric energy data receiver;

the input end of the clock module is used for acquiring time setting information; the output end of the clock module is connected with the input end of the detection module and is used for sending the time setting information to the detection module so that the detection module can acquire and send the time setting information;

the detection module is used for detecting whether an electromagnetic field and an alternating magnetic field exist outside the electric energy data receiver or not, and whether the intensity of the electromagnetic field and the intensity of the alternating magnetic field exceed a preset intensity threshold value or not, and obtaining external interference information of the electric energy data receiver;

The output end of the detection module is connected with the second communication module and is used for sending external interference information to the second communication module; the output end of the detection module is also connected with the input end of the external data storage module and is used for storing external interference information into the external data storage module.

In one possible implementation, the detection module includes a frequency detection unit and a high voltage field detection unit;

the frequency detection unit collects continuous electromagnetic wave signals, converts the electromagnetic wave signals into first analog electric signals, judges whether the frequency of the first analog electric signals exceeds a preset frequency threshold, and determines that high-power electromagnetic field interference exists outside the electric energy data receiver if the frequency exceeds the preset frequency threshold;

the high-voltage field detection unit acquires a second voltage signal, converts the second voltage signal into a pulse signal, judges whether the pulse number of the pulse signal is not less than a preset pulse threshold, and if the pulse number is more than the preset pulse threshold, determines that the outside of the electric energy data receiver is interfered by an alternating magnetic field.

In one possible implementation manner, when the main control computer judges whether the user has electricity stealing behavior according to the primary side electricity consumption data and the secondary side electricity consumption data, the main control computer is used for:

According to the received primary side power consumption data and secondary side power consumption data, respectively determining a primary side historical power consumption curve and a secondary side historical power consumption curve of a power user;

and determining the difference value of the power utilization data corresponding to the primary side historical power utilization curve and the secondary side historical power utilization curve respectively at any moment, judging that the power user has power stealing behaviors if the difference value exceeds a preset threshold value, and displaying alarm information.

The embodiment of the invention provides a power theft detection system, which is convenient for subsequent comparison by installing an electric energy data acquirer on the primary side of a power consumer transformer to acquire the primary side power utilization data of the power consumer transformer, namely, the data before passing through a voltmeter; installing an electric energy data receiver on the secondary side of the power consumer transformer, receiving the primary side power utilization data of the power consumer transformer, detecting whether external interference information exists outside the electric energy data receiver, wherein the external interference information can influence the normal operation of the electricity larceny detection system, and if the external interference information exists, the electric energy data receiver sends out an alarm sound to prompt an electricity larceny person to stop larceny, or sends out alarm information to a main control computer in a wireless transmission mode to prompt the possible existence of electricity larceny condition of the staff; the acquisition terminal receives primary side electricity utilization data, acquires secondary side electricity utilization data acquired by the electric energy meter and uploads the secondary side electricity utilization data to the main control computer, and the main control computer compares the received primary side electricity utilization data with the secondary side electricity utilization data to judge whether the electricity stealing behavior exists in the power consumer or not, namely, the actual electricity utilization data of the power consumer is compared with the electricity data of the electric energy meter of the power consumer, and whether the electricity stealing behavior exists in the power consumer or not can be accurately judged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a power theft detection system provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a power data acquirer according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a current processing module according to an embodiment of the present invention;

FIG. 4 is a circuit diagram of a current processing module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a power data receiver according to an embodiment of the present invention.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an electricity theft detection system according to an embodiment of the present invention, which is described in detail below:

the power data acquirer 1 is arranged on the primary side of the power consumer transformer, is used for acquiring the primary side power consumption data of the power consumer transformer, and is transmitted to the power data receiver 2 arranged on the secondary side of the power consumer transformer in a wireless transmission mode.

In this embodiment, the electric energy data acquirer 1 is disposed on the primary side of the power consumer transformer, and is capable of acquiring the primary side electricity consumption data of the power consumer transformer, that is, acquiring the electric energy data before the electric energy meter of the power consumer, so as to facilitate comparing the primary side electricity consumption data with the electricity consumption data of the electric energy meter, thereby determining whether the power consumer has electricity stealing behavior.

The electric energy data receiver 2 is also used for detecting external interference information of the electric energy data receiver 2, and when the external interference information exists, the electric energy data receiver 2 sends out alarm sound or sends out alarm information to the main control computer in a wireless transmission mode.

In this embodiment, the electric energy data receiver 2 is disposed on the secondary side of the power consumer transformer, and receives the primary side power consumption data in a wireless transmission manner, so as to facilitate subsequent transmission; the electric energy data receiver 2 can also detect external interference information of the electric energy data receiver 2, wherein the external interference information refers to interference information which can influence the normal operation of the electric energy data receiver 2, such as high-power electromagnetic field interference and alternating magnetic field interference, if the external interference information exists, it is indicated that an electric power user can interfere with the normal operation of the electric energy meter 5 by using the high-power electromagnetic field or the alternating magnetic field, so as to steal electricity, that is, it is indicated that the electric power user can have electricity stealing behavior, at this moment, the electric energy data receiver 2 can send an alarm sound to prompt an electricity stealer to stop stealing electricity, or send alarm information to the main control computer 4 in a wireless transmission mode to prompt the staff that the electric power user can have electricity stealing behavior, and verification and further reminding are needed.

The electric energy meter 5 is positioned on the secondary side of the power consumer transformer and is used for collecting the secondary side electricity consumption data of the power consumer transformer, namely the electricity consumption data of the power consumer needing to pay fees; if the primary side electricity consumption data of the power consumer is different from the secondary side electricity consumption data, the power consumer is indicated to have possible electricity stealing behavior.

The acquisition terminal 3 is used for acquiring primary side electricity utilization data received by the electric energy data receiver 2, acquiring secondary side electricity utilization data of the power consumer transformer acquired by the electric energy meter 5 and uploading the secondary side electricity utilization data to the main control computer 4 in a wireless transmission mode.

In this embodiment, the acquisition terminal 3 is located at the user side, and is capable of acquiring primary side power consumption data received by the electric energy data receiver, acquiring secondary side power consumption data of the power consumer transformer acquired by the electric energy meter 5, that is, acquiring power consumption data to be compared, and transmitting the power consumption data to the main control computer 4, so as to facilitate further comparison.

And the main control computer 4 is used for judging whether the electricity stealing behavior exists in the power user according to the received primary side electricity utilization data and the secondary side electricity utilization data.

In this embodiment, the main control computer 4 compares the received primary side power consumption data with the secondary side power consumption data, and if the primary side power consumption data is consistent with the secondary side power consumption data and the main control computer 4 does not receive the alarm information sent by the electric energy data receiver 2, it is indicated that the electric power user is normally powered on, and no electricity stealing behavior exists; if the primary power consumption data is inconsistent with the secondary power consumption data, or the main control computer 4 receives the alarm information sent by the electric energy data receiver 2, it is indicated that the power user may have abnormal power consumption, that is, may have electricity stealing behavior, and further verification is required by staff.

According to the embodiment of the invention, the electric energy data acquirer 1 is arranged on the primary side of the power consumer transformer to acquire the primary side power consumption data of the power consumer transformer, namely, the data before passing through the voltmeter 5, so that the subsequent comparison is facilitated; the method comprises the steps that an electric energy data receiver 2 is arranged on a secondary side of a power consumer transformer, primary side power utilization data of the power consumer transformer are received, whether external interference information exists outside the electric energy data receiver 2 or not is detected, the external interference information can influence the normal operation of a power stealing detection system, if the external interference information exists, the electric energy data receiver 2 sends out alarm sounds to prompt power stealing personnel to stop stealing electricity, or alarm information is sent to a main control computer 4 in a wireless transmission mode to prompt that the power stealing situation possibly exists for the staff; the acquisition terminal 3 receives primary side electricity consumption data, acquires secondary side electricity consumption data acquired by the electric energy meter 5, uploads the secondary side electricity consumption data to the main control computer 4, and the main control computer 4 compares the received primary side electricity consumption data with the secondary side electricity consumption data to judge whether the electricity stealing behavior exists for the electricity consumer or not, namely, the actual electricity consumption data of the electricity consumer is compared with the electricity data of the electric energy meter 5 of the electricity consumer, and whether the electricity stealing behavior exists for the electricity consumer or not can be accurately judged.

In one possible implementation, referring to the schematic structure of the electrical energy data acquirer shown in fig. 2, the electrical energy data acquirer 1 includes a current transformer module 11, a current processing module 12, a circuit control module 13, a timing module 16, a single-chip microcomputer 14, and a first communication module 15.

The input end of the current transformer module 11 is used for collecting primary side current data of the power consumer voltage device; the output end of the current transformer module 11 is connected with the input end of the current processing module 12, and is used for converting primary side current data into secondary transformation ratio current and transmitting the secondary transformation ratio current to the current processing module 12.

In this embodiment, the current transformer 11 includes an iron core made of a magnetically conductive material and a coil wound around the iron core, and the iron core may be a silicon steel iron core, permalloy, or a core made of ultracrystalline material.

The following describes a magnetic core made of permalloy, which has a wide magnetic permeability range and a high magnetic permeability of a weak magnetic field, so that a high-precision sensing current signal can be obtained when the current on the power line is about 2A; meanwhile, the magnetic core has higher saturation magnetic induction intensity, the saturation magnetic induction intensity is generally between 0.6 and 1.0T, and the saturation phenomenon can not occur when the sensing power line reaches a large current of more than 300A.

The coil wire diameter can be selected by adopting a relatively thicker QZ-2/180 type high-voltage-resistant and high-temperature-resistant polyester enameled wire, the overload capacity of 20 times of the current of the power line can be instantly born, and the coil is ensured not to be damaged within 1 minute.

Through above-mentioned magnetic core and coil can make current transformer module 11 realize wide range current sensing and get can accomplish 1:1000, and then transmitting the secondary transformation ratio current to the current processing module 12.

The signal output end of the current processing module 12 is connected with the signal input end of the singlechip 14 and is used for converting the received secondary transformation ratio current into a voltage signal and then sending the voltage signal to the singlechip 14; the power output end of the current processing module 12 is connected with the input end of the circuit control module 13, and is used for providing power for the circuit control module 13.

In this embodiment, the current processing module 12 receives the secondary transformation ratio current transmitted by the current transformer module 11, and further, the secondary transformation ratio current transmission is divided into two aspects, on one hand, the secondary transformation ratio current transmission is used for providing sampling current, and the sampling current is converted to obtain a voltage signal and is sent to the singlechip 14; on the other hand, the device is used for providing electric energy for the circuit control module 13 in the electric energy data acquirer 1, so as to support the singlechip 14, the first communication module 15 and the timing module 16 in the electric energy data acquirer 1 to work normally.

The output end of the circuit control module 13 is connected with the electric energy input end of the singlechip 14 and is used for providing electric energy for the singlechip 14.

In this embodiment, the electric energy control module 13 can convert the front-stage voltage into the voltage required by the back-stage during normal operation, that is, into the voltage required by the normal operation of the singlechip 14, and provides electric energy for the singlechip 14.

Specifically, a chip in the electric energy control module 13 can be an LTC2525ESC6-3 chip, the chip can convert 1V-6V input voltage into 3V output voltage, when the current level voltage drops to a certain value, the normal working voltage of the singlechip can be maintained, and when the current level voltage drops to a certain value, the singlechip 14 in the electric energy data acquirer 1 is prevented from immediately stopping working; and meanwhile, the power supply time of the chip can be prolonged.

In addition, the electric energy control module 13 further includes capacitors Cs1 and Cs2, and the capacitors Cs1 and Cs2 can be used for storing energy, filtering and reducing power supply ripple.

The output end of the singlechip 14 is connected with the input end of the first communication module 15, and is used for calculating the instantaneous power of the primary side of the transformer according to the received voltage signal, obtaining primary side power consumption data, and transmitting the primary side power consumption data to the first communication module 15.

In this embodiment, the singlechip 14 receives the voltage signal sent by the voltage processing module 12, calculates the instantaneous power of the primary side of the power consumer transformer according to the voltage signal, and obtains the primary side power consumption data of the power consumer transformer, so as to transmit the primary side power consumption data to the first communication module 15.

The input end of the singlechip 14 is also connected with the output end of the electric energy control module 13, and the electric energy control module 13 provides electric energy for the singlechip 14, so that the singlechip 14 can work normally; and the output end of the singlechip 14 is also respectively connected with the input end of the timing module 16 and the input end of the first communication module 15, so as to provide the electric energy required by normal operation for the timing module 16 and the first communication module 15.

The output of the first communication module 15 is used to transmit primary-side power consumption data to the power data receiver 2.

In this embodiment, the first communication module 15 sends the received primary electricity data to the electric energy data receiver 2, so as to facilitate subsequent electricity theft detection for the electric power consumer. Specifically, the first communication module 15 may employ an NRF905 chip.

The input end of the timing module 16 is used for acquiring time setting information; the output end of the timing module 16 is connected with the input end of the singlechip 14, and is used for sending a restarting signal to the singlechip 14 every preset time, and the singlechip 14 restarts according to the restarting signal.

In this embodiment, the timing module 16 sends a restart signal to the singlechip 14, so that the singlechip 14 can restart at intervals of a preset time, thereby ensuring normal use of the singlechip 14 and avoiding the dead halt of the singlechip 14.

In one possible implementation, referring to the schematic structural diagram of the current processing module shown in fig. 3, the current processing module 12 includes a protection unit 121, a conversion unit 122, a charging unit 123, and an energy storage unit 124.

The input end of the protection unit 121 is connected with the output end of the current transformer module 11 and is used for receiving the secondary transformation ratio current; the output end of the protection unit 121 is connected to the input end of the conversion unit 122, and is used for limiting the potential of the output end of the protection unit 121 and transmitting the secondary transformation ratio current after limiting the potential to the conversion unit 122.

In this embodiment, the protection unit 121 receives the secondary transformation ratio current output by the current transformer 11, limits the potential of the output end of the protection unit 121, and avoids affecting the normal operation of the conversion unit 122 and the charging unit 123 due to the larger current or voltage.

The output of the conversion unit 122 serves as a signal output of the current processing module 12.

In this embodiment, the conversion unit 122 receives the secondary transformation ratio current processed by the protection unit 121, and converts the secondary transformation ratio current into a voltage signal and transmits the voltage signal to the singlechip 14 for data acquisition.

The input end of the charging unit 123 is connected with the output end of the protection unit 121, and is used for rectifying the alternating current output by the protection unit 121; the input end of the charging unit 123 is also connected with the output end of the singlechip 14, and is used for charging and discharging according to the instruction of the singlechip 14; the output end of the charging unit 123 is connected to the input end of the energy storage unit 124, and is used for discharging to the energy storage unit 124 so that the energy storage unit 124 stores energy.

In this embodiment, the charging unit 123 controls the circuit to be in a charging or discharging state according to the instruction of the singlechip 14, and when in the charging state, the charging unit 123 charges the energy storage unit 124, and when in the discharging state, the energy storage unit 124 provides the electric energy required by normal operation for the subsequent stage.

The output end of the energy storage unit 124 is connected with the input end of the circuit control module 13 and is used for providing electric energy for the circuit control module 13; the output end of the energy storage unit 124 is also connected to the signal input end of the singlechip 14, and is used for transmitting a voltage change signal to the singlechip 14, so that the singlechip 4 sends a charge-discharge instruction according to the voltage change signal.

In this embodiment, the energy storage unit 124 transmits a unit change signal to the singlechip 14, and the singlechip 14 sends a charging or discharging instruction to the charging unit 123 according to the received voltage change signal, so as to perform subsequent operations.

In one possible implementation, see the circuit diagram of the current processing module shown in fig. 4, wherein the protection unit 121 includes a diode D1, a diode D2, a diode D3, and a diode D4; the anode of the diode D1 is connected with the cathode of the diode D2 in parallel and then is respectively connected with the output end of the current transformer module 11 and the input end of the conversion unit 122; the cathode of the diode D1 is connected with the anode of the diode D3, the anode of the diode D2 is connected with the cathode of the diode D4, and the cathode of the diode D3 and the anode of the diode D4 are connected in parallel and then connected with the input end of the charging unit 123 and the input end of the converting unit 122 respectively.

In the present embodiment, the diodes D1, D2, D3 and D4 function as the protection switching unit 122, and when an abnormal condition, i.e., a current or voltage, occurs, the diodes D1 and D3 are turned on, allowing a current to flow from the diodes D1 and D3, or the diodes D2 and D4 are turned on, allowing a current to flow from the diodes D2 and D4, thereby reducing the voltage clamp by about ±0.6v.

In one possible implementation, the conversion unit 122 includes a conversion resistor R1, a conversion resistor R2, a current limiting resistor R3, a current limiting resistor R4, a capacitor C1, and a capacitor C2; one end of the switching resistor R1 and one end of the switching resistor R2 which are connected in parallel are respectively connected with the output end of the protection unit 121 and one end of the current limiting resistor R3; the other end of the parallel connection of the conversion resistor R1 and the conversion resistor R2 is respectively connected with the output end of the protection unit 121 and one end of the current limiting resistor R4; the other end of the current limiting resistor R3 is respectively connected with the signal input end of the singlechip 14 and one end of the capacitor C1; the other end of the current limiting resistor R4 is respectively connected with the signal input end of the singlechip 14 and one end of the capacitor C2; the other end of the capacitor C1 is connected with the other end of the capacitor C2 and then grounded.

In this embodiment, the secondary transformation ratio current is converted into a voltage signal through the conversion resistor R1 and the conversion resistor R2, the current limiting resistor R3 and the current limiting resistor R4 play a role in current limiting, and then the voltage signal is transmitted to the signal input end of the singlechip 14, and the singlechip 14 performs data acquisition through digital-to-analog conversion.

In one possible implementation, the charging unit 123 includes a rectifying diode Ds1, a rectifying diode Ds2, a rectifying diode Ds3, a rectifying diode Ds4, a charging diode Ds6, a charging diode Ds7, a charging diode Ds8, a charging diode Ds9, a charging diode Ds10, a charging diode Ds11, a resistor Rs1, and a MOS transistor Vs1; the anode of the diode Ds1 is connected with the anode of the diode Ds3 and then grounded, and the cathode of the diode Ds1 is connected with the anode of the diode Ds2 and then connected with the protection unit 121; the cathode of the diode Ds3 is connected with the anode of the diode Ds4 and then is connected with the output end of the current transformer module 11; the cathode of the diode Ds2 is connected with the cathode of the diode Ds4 and then is respectively connected with the anode of the diode Ds6, the drain of the MOS tube and the input end of the energy storage unit 124; the source electrode of the MOS tube is grounded; the grid electrode of the MOS tube is respectively connected with the CTR pin of the singlechip 14 and one end of the resistor Rs 1; the other end of the resistor Rs1 is connected with the cathode of the diode Ds11 and then grounded; the diode Ds6, the diode Ds7, the diode Ds8, the diode Ds9, the diode Ds10 and the diode Ds11 are sequentially connected in series, and the cathode of the diode Ds11 is also connected to the input terminal of the energy storage unit 124.

In this embodiment, the rectifying diode Ds1, the rectifying diode Ds2, the rectifying diode Ds3 and the rectifying diode Ds4 are used for completing rectification of the whole circuit, so as to obtain rectified direct current, and facilitate the subsequent charging of the energy storage unit 124; the charging diodes Ds6, ds7, ds8, ds9, ds10 and Ds11 play a role in stabilizing voltage, the conduction voltage drop of each charging diode is about 0.6V, the voltage drop of the six charging diodes after being connected in series is about 3.6V, and damage to the energy storage unit 124 caused by overlarge voltage can be avoided by connecting the six charging diodes in series; according to the instruction of charging or discharging the singlechip 14, the CTR pin of the singlechip 14 is correspondingly set high or low, so that the circuit is in a charging or discharging state.

In one possible implementation, the energy storage unit 124 includes a diode Ds5, a supercapacitor Cs4, a capacitor Cs3, a resistor Rs2, and a resistor Rs3; the anode of the diode Ds5 is connected with the output end of the charging unit 123, and the cathode of the diode Ds5 is respectively connected with the anode of the supercapacitor Cs4, one end of the capacitor Cs3, one end of the resistor Rs2 and the input end of the circuit control module 13; the negative electrode of the super capacitor Cs4 and the other end of the capacitor Cs3 are connected in parallel and then grounded; one end of the resistor Rs3 is grounded; the other end of the resistor Rs3 is connected with the other end of the resistor Rs2 and then connected with the signal input end of the singlechip 14.

In this embodiment, the supercapacitor Cs4 is used for storing energy and providing the singlechip 14 with required electric energy through the circuit control module 13; the diode Ds5 is used to prevent the current from flowing backward, that is, when the supercapacitor Cs4 starts to supply electric power, the current from flowing backward into the charging unit 123.

Referring to the circuit diagram of the energy storage unit 124 in the current processing module 12 in fig. 4, a VC is labeled with a circuit control module 13, and is used for providing the singlechip 14 with electric energy for normal operation through the circuit control module 13; the labeled VOL is connected to the signal input end of the singlechip 14, and can be specifically connected to an a/D port, so that the singlechip 14 can conveniently detect the voltage change of the supercapacitor Cs4 after discharging, obtain a voltage change signal, and adjust the charge and discharge instruction according to the voltage change signal.

Specifically, when the voltage at VOL increases or decreases to the corresponding preset voltage threshold, the CTR pin of the singlechip 14 is correspondingly set high or low, so that the circuit is in a charging or discharging state, and the supercapacitor Cs4 is charged or discharged. The switch MOS tube Vs1 provides a drainage channel, and when the switch MOS tube Vs1 is closed, the whole circuit is in a charging state to charge the super capacitor Cs 4; when the switch MOS tube Vs1 is in a conducting state, the whole circuit is in a current collection state, the super capacitor Cs4 starts to discharge, electric energy required by normal operation is provided for the circuit control module 13, and at the moment, current passing through the rectifier diode is discharged through the MOS tube Vs1, so that the super capacitor Cs4 is not charged.

In one possible implementation, referring to the schematic diagram of the power data receiver 2 shown in fig. 5, the data receiver includes a second communication module 21, a spread data storage module 22, a detection module 23, and a clock module 24.

The input end of the second communication module 21 is used for receiving the primary side power consumption data sent by the power data acquirer 1; the second communication module 21 is connected with the external expansion data storage module 22, and is used for storing primary side power consumption data into the external expansion data storage module 22 and acquiring power consumption information of a power user from the external expansion data storage module 22; the output of the second communication module 21 serves as the output of the power data receiver 2.

In this embodiment, the second communication module 21 is configured to receive the primary-side power consumption data sent by the first communication module 15, so as to implement communication between the power data acquirer 1 and the power data receiver 2, where the communication frequency may be 433MHZ or 915MHZ; the second communication module 21 also sends the primary side electricity consumption data to the acquisition terminal 3 to realize the communication between the electric energy data receiver 2 and the acquisition terminal 3, specifically, the communication can be carried out through a 485 channel DL645 protocol; the second communication module 21 can also exchange data with a handheld terminal of a worker through wireless communication, and the handheld terminal can acquire power user power utilization information and primary side power utilization data stored in the expansion data storage module 22 through communication with the second communication module 21; the staff can also communicate with the second communication module 21 through the handheld terminal, set up the electric energy data receiver 2, and remotely extract the primary side electricity consumption data stored in the electric energy data receiver 2 and the electricity consumption information of the power consumer through the handheld terminal.

The second communication module 21 further stores primary-side electricity consumption data into the spread data storage module 22 with the spread data storage module 22, and acquires electricity consumption information of the power consumer from the spread data storage module 22.

The input end of the clock module 24 is used for acquiring time setting information; the output end of the clock module 24 is connected with the input end of the detection module 23, and is used for sending the time setting information to the detection module 23, so that the detection module 23 obtains and sends the time setting information.

The detection module 23 is configured to detect whether an electromagnetic field and an alternating magnetic field exist outside the electric energy data receiver 2, and whether the strength of the electromagnetic field and the strength of the alternating magnetic field both exceed a preset strength threshold value, and obtain external interference information of the electric energy data receiver 2; the output end of the detection module 23 is connected with the second communication module 21 and is used for sending external interference information to the second communication module 21; the output end of the detection module 23 is also connected to the input end of the external data storage module 22, for storing external interference information into the external data storage module 22.

In this embodiment, the detection module 23 is configured to detect whether an electromagnetic field and an alternating magnetic field exist outside the electric energy data receiver 2, and if the electromagnetic field or the alternating magnetic field exists, it indicates that the electric power user may interfere with the normal operation of the electric energy meter by using a high-power electromagnetic field or an alternating magnetic field, so as to steal electricity, that is, it indicates that the electric power user may have electricity stealing behavior, the detection module 23 may send an alarm sound to prompt an electricity stealer to stop stealing electricity, or the detection module 23 transmits alarm information to the second communication module 21 and time synchronization information when the electricity stealing information is detected according to the measured electricity stealing information, so that the second communication module 21 sends alarm information to the main control computer 4.

In one possible implementation, the detection module 23 includes a frequency detection unit 231 and a high voltage field detection unit 232.

In the present embodiment, the detection module 23 includes a frequency detection unit 231 and a high-voltage field detection unit 232, the frequency detection unit 231 can detect whether an electromagnetic field exists outside the power data receiver 2, and the high-voltage field detection unit 232 can detect whether an alternating magnetic field exists outside the power data receiver 2.

The frequency detection unit 231 collects continuous electromagnetic wave signals, converts the electromagnetic wave signals into first analog electric signals, judges whether the frequency of the first analog electric signals exceeds a preset frequency threshold, and if so, determines that high-power electromagnetic field interference exists outside the electric energy data receiver 2.

In this embodiment, the maximum frequency of the electromagnetic field detection tool is about 3GHZ, and the power of the electromagnetic field detection tool is about 30dBm to 90dBm, and because the power of the electromagnetic field detection tool is relatively high, the chip cannot bear such high-power signals, so the detection signal of the electromagnetic field detection tool needs to be attenuated before entering the electromagnetic field detection chip, so that the power of the detection signal reaches a reasonable level that the detection chip can detect. Therefore, the attenuator is built by using a resistor to attenuate the detection signal, and specifically, 7 pi-type attenuators are built by using a resistor, and each pi-type attenuator attenuates the signal by about 10 dBm. In order to detect the frequency of the detection signal at the same time, the detection signal must be subjected to two power division, namely, two power dividers are needed to be used, and similarly, the two power dividers are built by self by adopting a diode and a capacitor, so that the cost is saved.

Further, the electromagnetic field intensity detection chip used in the frequency detection unit 231 may be an AD8318 chip for measuring radio frequency power of 1MHz to 8GHz in a measuring range of about 60dB. The frequency detection unit 231 further includes an analog-to-digital converter (Analog to Digital Converter, ADC), a frequency (RF) detector, an emitter follower, and a single chip microcomputer; the output end of the ADC outputs a 12-bit measurement result digital code, and the ADC is provided with a serial interface and an integrated reference voltage source; the output lead of the RF detector has the function of realizing seamless with the ADC module, in order to increase the driving capability of the output end of the chip, the output end of the chip is provided with an emitter follower, and signals passing through the emitter follower directly enter an A/D port of the singlechip for identification and processing, so that the high-power electromagnetic field interference exists outside the electric energy data receiver 2.

The high voltage field detection unit 232 obtains the second voltage signal, converts the second voltage signal into a pulse signal, judges whether the pulse number of the pulse signal is not less than a preset pulse threshold, and if the pulse number exceeds the preset pulse threshold, determines that the external of the electric energy data receiver 2 has the interference of the alternating magnetic field.

A high-voltage field detection chip is also used in the high-voltage field detection unit 232, and in this embodiment, an MLX91209 chip is used, and the output of the chip is a sine-wave-like voltage signal with a dc bias, that is, a high-voltage field detection signal, but since the high-voltage field detection unit 232 detects an alternating magnetic field, the amplitude of the peak and the trough of the sine-wave-like high-voltage field detection signal varies in different levels. After the signals enter the singlechip, the singlechip cannot recognize, so that the high-voltage field detection signals are subjected to comparison shaping and follow-up filtering processing, and the high-voltage field detection signals are processed into pulse signals which can be recognized by the singlechip; the MLX91209 chip envelopes part of dense voltage signal peaks into an integral peak signal, converts voltage signals higher than 2.15V into positive pulse signals, converts voltage signals lower than 2.15V into negative pulse signals, and outputs the pulse signals to a singlechip at a later stage for pulse counting after finally passing through a following filter circuit. When the number of pulses reaches or exceeds a preset pulse threshold, the interference of the alternating magnetic field exists around the pulse.

In one possible implementation manner, the main control computer 4 is configured to, when determining whether the user has electricity stealing behavior according to the primary electricity consumption data and the secondary electricity consumption data: according to the received primary side power consumption data and secondary side power consumption data, respectively determining a primary side historical power consumption curve and a secondary side historical power consumption curve of a power user; and determining the difference value of the power utilization data corresponding to the primary side historical power utilization curve and the secondary side historical power utilization curve respectively at any moment, judging that the power user has power stealing behaviors if the difference value exceeds a preset threshold value, and displaying alarm information.

In this embodiment, the difference value of the power consumption data corresponding to the primary side historical power consumption curve and the secondary side historical power consumption curve at any moment is determined, if the difference value exceeds the preset threshold value, it is indicated that the difference between the primary side power consumption data and the secondary side power consumption data may be caused by power stealing of the power user, that is, the power user may have power stealing behavior, alarm information is displayed, and further processing is facilitated for related staff.

According to the embodiment of the invention, the primary side electricity consumption data of the power consumer transformer, namely the data before passing through the voltmeter 5, is acquired by installing the electric energy data acquirer 1 on the primary side of the power consumer transformer, so that the subsequent comparison is facilitated; the primary side current data of the power consumer transformer is obtained through the current transformer module 11, the primary side current data are processed through the current processing module 12 to obtain corresponding voltage signals, the corresponding voltage signals are transmitted to the singlechip 14 for subsequent calculation, meanwhile, the current processing module 12 also stores energy, and the circuit control module 13 provides electric energy for the singlechip 14 to ensure the normal operation of the singlechip 14; the singlechip 14 obtains primary side power consumption data according to voltage signal processing, and sends the primary side power consumption data to the electric energy data receiver 2 arranged on the secondary side of the power consumer transformer through the first communication module 15; the electric energy data receiver 2 comprises a second communication module 21, a spread spectrum data storage module 22, a detection module 23 and a clock module 24; the second communication module 21 receives primary side power consumption data of the power consumer transformer, and the detection module 23 detects whether external interference information exists outside the power data receiver 2; specifically, the frequency detection unit 231 detects whether a high-power electromagnetic field exists outside the electric energy data receiver 2, the high-voltage field detection unit 232 detects whether an alternating magnetic field exists outside the electric energy data receiver 2, and if the high-power electromagnetic field or the alternating magnetic field exists, the normal operation of the electricity stealing detection system is affected, so that when the external interference information exists, the electric energy data receiver 2 sends out alarm sounds to prompt electricity stealing personnel, or sends out alarm information to the main control machine 4 in a wireless transmission mode to prompt the personnel that electricity stealing is possible; the acquisition terminal 3 receives primary side electricity consumption data, acquires secondary side electricity consumption data acquired by the electric energy meter 5, uploads the secondary side electricity consumption data to the main control computer 4, and the main control computer 4 compares the received primary side electricity consumption data with the secondary side electricity consumption data to judge whether the electricity stealing behavior exists for the electricity consumer or not, namely, the actual electricity consumption data of the electricity consumer is compared with the electricity data of the electric energy meter 5 of the electricity consumer, and whether the electricity stealing behavior exists for the electricity consumer or not can be accurately judged.

The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.

Claims (10)

1. An electricity theft detection system, comprising:

the power data acquisition device is arranged on the primary side of the power consumer transformer, and is used for acquiring the primary side power consumption data of the power consumer transformer and transmitting the primary side power consumption data to the power data receiver arranged on the secondary side of the power consumer transformer in a wireless transmission mode; the electric energy data receiver is also used for detecting external interference information of the electric energy data receiver, and when the external interference information exists, the electric energy data receiver sends out alarm sound or sends out alarm information to the main control computer in a wireless transmission mode;

The acquisition terminal is used for acquiring the primary side electricity utilization data received by the electric energy data receiver, acquiring the secondary side electricity utilization data of the power consumer transformer acquired by the electric energy meter and uploading the secondary side electricity utilization data to the main control computer in a wireless transmission mode; and the main control machine is used for judging whether the electricity stealing behavior exists in the power user according to the received primary side electricity utilization data and the secondary side electricity utilization data.

2. The electricity theft detection system of claim 1, wherein the electrical energy data acquirer comprises a current transformer module, a current processing module, a circuit control module, a timing module, a single chip microcomputer, and a first communication module;

the input end of the current transformer module is used for collecting primary side current data of the power consumer voltage device; the output end of the current transformer module is connected with the input end of the current processing module and is used for converting the primary side current data into secondary transformation ratio current and transmitting the secondary transformation ratio current to the current processing module;

the signal output end of the current processing module is connected with the signal input end of the singlechip and is used for converting the received secondary transformation ratio current into a voltage signal and then sending the voltage signal to the singlechip; the electric energy output end of the current processing module is connected with the input end of the circuit control module and is used for providing electric energy for the circuit control module;

The output end of the circuit control module is connected with the electric energy input end of the singlechip and is used for providing electric energy for the singlechip;

the output end of the singlechip is connected with the input end of the first communication module and is used for calculating the instantaneous power of the primary side of the transformer according to the received voltage signal to obtain primary side power utilization data and transmitting the primary side power utilization data to the first communication module;

the output end of the first communication module is used for sending the primary side electricity consumption data to the electric energy data receiver;

the input end of the timing module is used for acquiring time setting information; the output end of the timing module is connected with the input end of the singlechip and is used for sending a restarting signal to the singlechip at preset time intervals, and the singlechip is restarted according to the restarting signal.

3. The electricity theft detection system of claim 2, wherein the current processing module comprises a protection unit, a conversion unit, a charging unit, and an energy storage unit;

the input end of the protection unit is connected with the output end of the current transformer module and is used for receiving the secondary transformation ratio current;

the output end of the protection unit is connected with the input end of the conversion unit and is used for limiting the electric potential of the output end of the protection unit and transmitting the secondary transformation ratio current after the electric potential limiting to the conversion unit;

The output end of the conversion unit is used as a signal output end of the current processing module;

the input end of the charging unit is connected with the output end of the protection unit and is used for rectifying the alternating current output by the protection unit; the input end of the charging unit is also connected with the output end of the singlechip and is used for charging and discharging according to the instruction of the singlechip; the output end of the charging unit is connected with the input end of the energy storage unit and is used for discharging the energy to the energy storage unit so that the energy storage unit can store energy;

the output end of the energy storage unit is connected with the input end of the circuit control module and is used for providing electric energy for the circuit control module; the output end of the energy storage unit is also connected with the signal input end of the singlechip and is used for transmitting a voltage change signal to the singlechip so that the singlechip can send a charge and discharge instruction according to the voltage change signal.

4. A theft detection system according to claim 3, wherein the protection unit comprises a diode D1, a diode D2, a diode D3 and a diode D4;

the anode of the diode D1 is connected with the cathode of the diode D2 in parallel and then is respectively connected with the output end of the current transformer module and the input end of the conversion unit;

The cathode of the diode D1 is connected with the anode of the diode D3, the anode of the diode D2 is connected with the cathode of the diode D4, and the cathode of the diode D3 and the anode of the diode D4 are connected in parallel and then are respectively connected with the input end of the charging unit and the input end of the conversion unit.

5. A theft detection system according to claim 3, wherein the switching unit comprises a switching resistor R1, a switching resistor R2, a current limiting resistor R3, a current limiting resistor R4, a capacitor C1 and a capacitor C2;

one end of the switching resistor R1 and one end of the switching resistor R2 which are connected in parallel are respectively connected with the output end of the protection unit and one end of the current limiting resistor R3; the other end of the parallel connection of the conversion resistor R1 and the conversion resistor R2 is respectively connected with the output end of the protection unit and one end of the current-limiting resistor R4;

the other end of the current limiting resistor R3 is respectively connected with the signal input end of the singlechip and one end of the capacitor C1;

the other end of the current limiting resistor R4 is respectively connected with the signal input end of the singlechip and one end of the capacitor C2;

the other end of the capacitor C1 is connected with the other end of the capacitor C2 and then grounded.

6. A theft detection system according to claim 3, wherein the charging unit comprises a rectifier diode Ds1, a rectifier diode Ds2, a rectifier diode Ds3, a rectifier diode Ds4, a charger diode Ds6, a charger diode Ds7, a charger diode Ds8, a charger diode Ds9, a charger diode Ds10, a charger diode Ds11, a resistor Rs1 and a MOS transistor Vs1;

The anode of the diode Ds1 is connected with the anode of the diode Ds3 and then grounded, and the cathode of the diode Ds1 is connected with the anode of the diode Ds2 and then connected with the protection unit; the cathode of the diode Ds3 is connected with the anode of the diode Ds4 and then connected with the output end of the current transformer module;

the cathode of the diode Ds2 is connected with the cathode of the diode Ds4 and then is respectively connected with the anode of the diode Ds6, and the drain of the MOS tube is connected with the input end of the energy storage unit; the source electrode of the MOS tube is grounded;

the grid electrode of the MOS tube is respectively connected with the CTR pin of the singlechip and one end of the resistor Rs 1;

the other end of the resistor Rs1 is connected with the cathode of the diode Ds11 and then grounded;

the diode Ds6, the diode Ds7, the diode Ds8, the diode Ds9, the diode Ds10 and the diode Ds11 are sequentially connected in series, and the cathode of the diode Ds11 is also connected with the input end of the energy storage unit.

7. A theft detection system according to claim 3, wherein the energy storage unit comprises a diode Ds5, a supercapacitor Cs4, a capacitor Cs3, a resistor Rs2 and a resistor Rs3;

the anode of the diode Ds5 is connected with the output end of the charging unit, and the cathode of the diode Ds5 is respectively connected with the anode of the supercapacitor Cs4, one end of the capacitor Cs3, one end of the resistor Rs2 and the input end of the circuit control module;

The negative electrode of the supercapacitor Cs4 and the other end of the capacitor Cs3 are connected in parallel and then grounded;

one end of the resistor Rs3 is grounded; the other end of the resistor Rs3 is connected with the other end of the resistor Rs2 and then connected with the signal input end of the singlechip.

8. The theft detection system of claim 1, wherein the power data receiver comprises a second communication module, a spread spectrum data storage module, a detection module, and a clock module;

the input end of the second communication module is used for receiving the primary side power utilization data sent by the power data acquirer;

the second communication module is connected with the expansion data storage module and is used for storing the primary side power consumption data into the expansion data storage module and acquiring power consumption information of a power user from the expansion data storage module; the output end of the second communication module is used as the output end of the electric energy data receiver;

the input end of the clock module is used for acquiring time setting information; the output end of the clock module is connected with the input end of the detection module and is used for sending the time setting information to the detection module so that the detection module can acquire and send the time setting information;

The detection module is used for detecting whether an electromagnetic field and an alternating magnetic field exist outside the electric energy data receiver or not, and whether the intensity of the electromagnetic field and the intensity of the alternating magnetic field exceed a preset intensity threshold value or not, and obtaining external interference information of the electric energy data receiver;

the output end of the detection module is connected with the second communication module and is used for sending the external interference information to the second communication module; the output end of the detection module is also connected with the input end of the external data storage module and is used for storing the external interference information into the external data storage module.

9. The electricity theft detection system of claim 8, wherein the detection module comprises a frequency detection unit and a high voltage field detection unit;

the frequency detection unit collects continuous electromagnetic wave signals, converts the electromagnetic wave signals into first analog electric signals, judges whether the frequency of the first analog electric signals exceeds a preset frequency threshold, and determines that high-power electromagnetic field interference exists outside the electric energy data receiver if the frequency exceeds the preset frequency threshold;

the high-voltage field detection unit acquires a second voltage signal, converts the second voltage signal into a pulse signal, judges whether the pulse number of the pulse signal is not less than a preset pulse threshold, and determines that the outside of the electric energy data receiver is interfered by an alternating magnetic field if the pulse number of the pulse signal is more than the preset pulse threshold.

10. The electricity theft detection system according to claim 1, wherein the main control unit is configured to, when determining whether the electricity theft behavior exists for the user based on the primary-side electricity consumption data and the secondary-side electricity consumption data:

according to the received primary side power consumption data and secondary side power consumption data, respectively determining a primary side historical power consumption curve and a secondary side historical power consumption curve of a power user;

and determining the difference value of the power consumption data corresponding to the primary side historical power consumption curve and the secondary side historical power consumption curve respectively at any moment, judging that the power user has power stealing behaviors if the difference value exceeds a preset threshold value, and displaying alarm information.