CN104977447A - Electricity stealing analog simulation device and method - Google Patents

Abstract

The invention provides a power stealing simulation device and method. The method includes: the microprocessor MCU module receives the power stealing parameters set by the client, and the power stealing parameters include: simulated power stealing type, simulated power stealing point and wiring mode, voltage, current, and phase; the MCU module analyzes the power stealing parameters, Instructions corresponding to electric stealing parameters are called in the electric stealing mathematical model database, and instructions for wiring mode are sent to the relay matrix module, and instructions for simulated electric stealing types, simulated electric stealing points, voltage instructions, current instructions, and phases are sent to the impedance transformation module Instructions; according to the instructions sent by the MCU module, the relay matrix module connects the corresponding voltage and current loops through the actions of the relevant relays in the relay matrix; the impedance conversion module adjusts the impedance values of the relevant resistors and inductors in the module according to the instructions sent by the MCU module. Complete the simulation of the electricity stealing type, electricity stealing point, voltage, current, and phase.

Description

A power stealing simulation device and method

technical field

The invention relates to the field of electric power technology, in particular to a power stealing simulation device and method.

Background technique

With the development of social economy and the increase of electricity consumption, the problem of stealing electricity has become more and more prominent in society, and the methods of stealing electricity have become more and more hidden. The loss caused by electricity theft to power supply enterprises is huge. According to a conservative estimate, China's annual economic loss due to theft of electric energy reaches 20 billion yuan.

However, as the on-site personnel (especially new employees) of power supply companies have insufficient on-site experience and weak anti-stealing skills, it is difficult to find hidden stealing behaviors.

On the other hand, with the development of science and technology, simulation technology and models have become more and more mature. It has become possible to develop a set of simulation technology and models based on typical power theft methods. Anti-stealing skills are an effective means to make up for the lack of on-site experience of young electricity inspectors.

Contents of the invention

In order to solve the problems of insufficient on-site experience and weak anti-stealing skills of the on-site personnel of power supply enterprises, the present invention, from a practical point of view, is as close as possible to the actual production site, and highly simulates and demonstrates the process of stealing electricity and anti-stealing of various user metering devices on site. Stealing process. The electricity stealing simulation simulation device and method provided by the present invention can simulate and restore various electricity stealing means, and achieve the current situation of on-site personnel training for power supply enterprises by realizing the simulation of mainstream, typical, and high-tech electricity stealing methods. Solve the problems of insufficient on-site experience and weak anti-stealing skills of on-site personnel. At the same time, the electricity stealing simulation simulation device and method provided by the present invention can be used to conduct in-depth analysis of various electricity stealing methods, and use actual simulation to analyze the data change trend of the electric energy meter and the electric energy metering circuit after the electricity stealing, and verify, Special research will help provide a scientific basis and platform for the research and analysis of anti-stealing measures.

The principles of the electricity stealing simulation device and method provided by the present invention are as follows: through the research on the electric energy metering device and the principle of electric energy metering, analyze and summarize the electricity stealing simulation mathematical model, establish a dynamic database of various electricity stealing methods, and use client software to automatically Set the gear of the output voltage, according to the power stealing method to be simulated, independently select the change mode of the wiring elements, automatically call out the corresponding power stealing wiring combination, and control the power output to the corresponding hook-up meter.

Specifically, the power stealing simulation method provided by the present invention includes:

The microprocessor MCU module receives the power stealing parameters set by the client, and the power stealing parameters include: simulated power stealing type, simulated power stealing point and connection mode, voltage, current, and phase;

The MCU module analyzes the electricity-stealing parameters, calls the instructions corresponding to the electricity-stealing parameters in the electricity-stealing mathematical model database, and sends the wiring mode instruction to the relay matrix module, and sends the simulated electricity-stealing type instruction and simulated electricity-stealing instruction to the impedance transformation module. Electric point command, voltage command, current command, phase command;

According to the instruction sent by the MCU module, the relay matrix module connects the corresponding voltage and current loop through the action of the relay matrix related relays;

According to the instructions sent by the MCU module, the impedance transformation module completes the simulation of the electricity stealing type, electricity stealing point, voltage, current, and phase by adjusting the impedance values of the relevant resistors and inductors in the module.

Wherein, the impedance transformation module, according to the instructions sent by the MCU module, adjusts the impedance value of the relevant resistance and inductance in the module, and after completing the simulation of the electricity stealing type, electricity stealing point, voltage, current, and phase, it also includes: The control output module outputs the voltage, current and phase parameters simulated by the impedance transformation module to the simulated electric energy meter.

Among them, when the control output module outputs the voltage, current and phase parameters simulated by the impedance transformation module to the simulated electric energy meter, the protection module performs overall leakage detection, overcurrent detection, and grounding detection on each output of the control output module. If abnormality is found, the MCU module will send an alarm signal and automatically cut off the input power of the power module.

Wherein, before the microprocessor MCU module receives the power stealing parameters set by the client, it also includes: according to the variation characteristics of voltage, current and power factor of various power stealing methods, establishing a description of electric energy metering wiring through the function P=UIcosΦ Electricity stealing mathematical model database; parameter P is active power, unit is kW; parameter U is voltage effective value, unit is kV; parameter I is current effective value, unit is A; parameter cosΦ is power factor.

Wherein, the electricity stealing type includes: voltage loss, current loss, phase shifting and/or meter internal counting; the wiring mode includes: single-phase wiring, three-phase four-wire and/or three-phase three-wire wiring; the The simulated energy meter includes: including single-phase, three-phase three-wire and\or three-phase four-wire simulated energy meter.

Correspondingly, the present invention also provides a power stealing simulation device, including: an MCU module, a relay matrix module and an impedance transformation module;

The MCU module is an embedded single-chip processing unit, which is used to receive the electricity stealing parameters set by the client, and after analyzing the electricity stealing parameters, transfer the instructions corresponding to the electricity stealing parameters through the electricity stealing mathematical model database Send to the relay matrix module and impedance transformation module;

The relay matrix module is a matrix composed of many relays; it is used to drive the relay action according to the instructions of the MCU module to complete the conversion of the wiring mode;

The impedance transformation module is integrated with various resistance resistors, diodes, and inductance coils; it is used to perform voltage division or current limitation through impedance transformation in the voltage loop or current loop according to the instructions of the MCU module, so that the load in the voltage loop The voltage value at the simulated electric energy meter is lower than the actual normal voltage value, and the current value in the current loop is lower than the actual normal current value.

Wherein, the device also includes: a control output module, which is used to output the voltage, current and phase parameters in the circuit built by the relay matrix module and the impedance transformation module to the simulated electric energy meter.

Among them, the device also includes: a protection module, which is used to perform overall leakage detection, overcurrent detection, grounding detection, etc. for each output of the control output module. If abnormality is found, the MCU module sends an alarm signal and automatically cuts off the input power of the power module.

Wherein, the device also includes: electricity stealing mathematical model database module, which is used to establish a electricity stealing mathematical model database describing electric energy metering wiring through the function P=UIcosΦ according to the variation characteristics of voltage, current and power factor of various electricity stealing methods.

Wherein, the device further includes: a power module, which is used to connect three-phase mains power to the power stealing simulation device, and perform rectification and filtering control on the three-phase mains power.

The power stealing simulation device and method provided by the present invention can make up for the shortcomings of some on-site workers in power supply enterprises who have insufficient experience in anti-power stealing and weak anti-power stealing skills. The device and method provided by the present invention simulate the stealing behavior of changing the wiring mode by establishing a mathematical model, adopt methods such as embedded single-chip microcomputer processing data, integrated communication module and computer exchange data, and supplemented with necessary functions such as protection and control programs to realize The electricity theft points are inside the energy meter, voltage transformer, and current transformer of the metering device of the single-phase meter billing user, the three-phase three-wire electric energy meter billing user, and the three-phase four-wire electric energy meter billing user. Simulation of power stealing methods.

Furthermore, in the device and method provided by the present invention, the power supply is provided by the mains after passing through the isolated power supply module and the dynamic monitoring control module, and the overload protection function and the leakage protection function are realized through the dynamic monitoring control module. Supplemented by the control program based on the hardware organization structure and the active control mode of PC software, the power-stealing points are divided into single-phase meter billing users, three-phase three-wire electric energy meter billing users, and three-phase four-wire electric energy meter billing users. Simulation of power theft methods such as inside the electric energy meter of the user's metering device, inside the voltage transformer, and inside the current transformer.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic flow chart of the first embodiment of the power stealing simulation method provided by the present invention;

Fig. 2 is a schematic flow chart of the second embodiment of the power stealing simulation method provided by the present invention;

Fig. 3 is the structural schematic diagram of the first embodiment of the power stealing simulation device provided by the present invention;

FIG. 4 is a schematic structural diagram of a second embodiment of a power stealing simulation device provided by the present invention;

Fig. 5 is a schematic diagram of a power stealing simulation device provided by an embodiment of the present invention;

Fig. 6 is a working logic diagram of the electricity stealing simulation device module provided by the present invention;

Fig. 7 is a program control logic diagram of the electricity stealing simulation device and method provided by the present invention.

Detailed ways

From a practical point of view, the present invention is as close as possible to the actual production site, and highly simulates and demonstrates the electricity stealing process and the anti-electricity stealing process of various user metering devices on the site. The electricity stealing simulation simulation device and method provided by the present invention can simulate and restore various electricity stealing means, and achieve the current situation of on-site personnel training for power supply enterprises by realizing the simulation of mainstream, typical, and high-tech electricity stealing methods. Solve the problems of insufficient on-site experience and weak anti-stealing skills of on-site personnel.

Referring to Fig. 1, it is a schematic flow chart of the first embodiment of the power stealing simulation method provided by the present invention. As shown in the figure, the power stealing simulation method includes:

In step S101, the microprocessor (MCU, Micro Control Unit) module receives the power stealing parameters set by the client, and the power stealing parameters include: simulated power stealing type, simulated power stealing point and connection mode, voltage, current, and phase.

Step S102, the MCU module analyzes the electricity stealing parameters, retrieves the instructions corresponding to the electricity stealing parameters in the electricity stealing mathematical model database, and sends a wiring mode instruction to the relay matrix module, and sends an analog electricity stealing type instruction to the impedance transformation module , Analog stealing point command, voltage command, current command, phase command.

In step S103, the relay matrix module connects the corresponding voltage and current loops through actions of relays related to the relay matrix according to the instructions sent by the MCU module.

In step S104, the impedance transformation module completes the simulation of electricity stealing type, electricity stealing point, voltage, current, and phase by adjusting the impedance values of relevant resistors and inductors in the module according to the instructions sent by the MCU module.

The power stealing simulation method provided by the present invention is as close to the actual production site as possible from a practical point of view, and highly simulates and demonstrates the power stealing process and anti-theft process of various user metering devices on site. The electricity stealing simulation method provided by the present invention can simulate and restore various electricity stealing methods, and realize the simulation of mainstream, typical, and high-tech electricity stealing methods, so as to achieve the current situation of on-site personnel training for power supply enterprises and solve on-site problems. Insufficient field experience of personnel and weak anti-stealing skills.

Referring to FIG. 2 , it is a schematic flow chart of the second embodiment of the power stealing simulation method provided by the present invention. In this embodiment, the power stealing simulation method will be described in more detail, specifically as follows:

Step S201, according to the variation characteristics of voltage, current and power factor of various ways of stealing electricity, establish a mathematical model database of stealing electricity describing electric energy metering wiring through the function P=UIcosΦ; wherein the parameter P is active power, and the unit is kW; the parameter U is The effective value of the voltage, the unit is kV; the parameter I is the effective value of the current, the unit is A; the parameter cosΦ is the power factor.

Those skilled in the art can understand that, from the basic metering principle and electric power (P=UIcosΦ) of the electric energy meter, whether an electric energy meter can measure correctly is determined by the product of the three elements of voltage, current, power factor and time, installation and The correctness of the wiring is determined. Therefore, breaking any one of these conditions can make the energy meter run slowly, stop or even reverse, so as to achieve the purpose of stealing electricity. According to the conditions of electric energy metering, combined with the components of electric energy metering, it can be attributed to the influence of the following three wiring elements: voltage transformer (TV) wiring, current transformer (TA) wiring, and electric energy meter tail wiring. In the case of stable power supply voltage and load, when any wiring element changes, the voltage phasor applied to the voltage coil of the electric energy meter or the current phasor applied to the current coil will also change accordingly, and a certain voltage applied to the electric energy meter The voltage phasor or current phasor on a component can be regarded as a mathematical function of the above three elements. Therefore, combined with the change characteristics of voltage, current and power factor of each typical electricity stealing method, through P=UIcosΦ(P: active power, the unit is kW; U: voltage effective value, the unit is kV; I: voltage effective value, The unit is A; cosΦ is the power factor) This function can establish a database of electric stealing mathematical models describing electric energy metering wiring.

At the same time, those skilled in the art should understand that this step S201 is a preset step, and this step does not need to be performed every time the power stealing simulation method provided in this embodiment is implemented. Meanwhile, the power stealing mathematical model database can be implemented according to actual needs. Supplement, modify, adjust and other operations.

Step S202, the microprocessor (MCU, Micro Control Unit) module receives the power stealing parameters set by the client, and the power stealing parameters include: simulated power stealing type, simulated power stealing point and wiring mode, voltage, current, phase, etc. . More specifically, in this embodiment, the user can select electricity stealing parameters at the client end (PC end). The main parameters are wiring mode (single-phase wiring, three-phase four-wire, three-phase three-wire wiring mode), electricity stealing type (voltage loss, current loss, phase shift, meter internal counting, etc.), analog electricity stealing point, voltage and current Output amplitude, phase, etc. The MCU module receives these power-stealing parameters set by the user on the client side.

Step S203, the MCU module analyzes the electricity stealing parameters, calls the instructions corresponding to the electricity stealing parameters in the electricity stealing mathematical model database, and sends a wiring mode instruction to the relay matrix module; sends an analog electricity stealing type instruction to the impedance transformation module , Simulate power-stealing point commands, voltage commands, current commands, phase commands, etc.

Step S204, according to the instructions sent by the MCU module, the relay matrix module connects the corresponding voltage and current loop through the action of the relevant relays of the relay matrix, and completes the transformation of the wiring mode, such as single-phase, three-phase three-wire, three-phase four-wire line etc.

In step S205, the impedance transformation module completes the type of electricity theft (loss of voltage, loss of current, phase shift, meter internal counting, etc.) Electric point and voltage, current, phase simulation.

Step S206, controlling the output module to output the parameters of voltage, current and phase simulated by the impedance transformation module to the simulated electric energy meter. Preferably, when the control output module outputs the voltage, current, and phase parameters simulated by the impedance transformation module to the simulated electric energy meter, the protection module performs overall leakage detection, overcurrent detection, and ground detection on each output of the control output module etc. When an abnormality is found, the MCU module is notified to send an alarm signal and automatically cut off the input power of the power module.

Those skilled in the art can understand that, in this embodiment, the electricity stealing types include: voltage loss, current loss, phase shifting and/or meter internal counting; the wiring methods include: single-phase wiring, three-phase four wire and/or three-phase three-wire connection; the simulated electric energy meter includes: including single-phase, three-phase three-wire and/or three-phase four-wire simulated electric energy meter.

The embodiment of the present invention analyzes and summarizes the electricity stealing simulation mathematical model through the research on the electric energy metering device and the electric energy metering principle, and establishes a dynamic database of various electricity stealing methods, and the PC software automatically calls out the corresponding Stealing power wiring combination, and automatically set the output voltage gear, power stealing mode, and wiring mode, and control the output module to control the power output to the corresponding hook-up meter, so that the operating data of the simulation meter is consistent with the setting, so as to achieve stealing Simulation of electrical simulation.

In this embodiment, the electricity-stealing mathematical model database is a necessary module. For the convenience of the public and those skilled in the art to understand and implement the technical solutions provided by the present invention, the electricity-stealing mathematical model database is further explained and illustrated as follows.

From the basic metering principle and electric power (P=UIcosΦ) of the electric energy meter, it can be known that whether an electric energy meter can be measured correctly is determined by the product of the three elements of voltage, current, power factor and time, and the correctness of installation and wiring. Therefore, breaking any one of these conditions can make the energy meter run slowly, stop or even reverse, so as to achieve the purpose of stealing electricity.

According to the conditions of electric energy metering, combined with the components of electric energy metering, it can be attributed to the influence of the following three wiring elements: voltage transformer (TV) wiring, current transformer (TA) wiring, and electric energy meter tail wiring. In the case of stable power supply voltage and load, when any wiring element changes, the voltage phasor applied to the voltage coil of the electric energy meter or the current phasor applied to the current coil will also change accordingly, and a certain voltage applied to the electric energy meter The voltage phasor or current phasor on a component can be regarded as a mathematical function of the above three elements. Therefore, combined with the change characteristics of voltage, current and power factor of each typical electricity stealing method, through P=UIcosΦ(P: active power, the unit is kW; U: voltage effective value, the unit is kV; I: voltage effective value, The unit is A; cosΦ is the power factor) This function can establish a database of electric stealing mathematical models describing electric energy metering wiring.

Establish a mathematical model database for stealing electricity, design the switching of actual wiring methods, design and develop computer operating software, and transform the previous manual wiring method into a combination of computer software and electricity stealing simulation hardware platform. When a variable input by the client changes, the MCU module can calculate the phase relationship and amplitude relationship between voltages and currents according to the electricity stealing mathematical model database, so as to obtain various combinations of wiring diagrams and phasors. Graphs, power expressions and correction factors.

According to the electricity stealing mathematical model database, we realize it through the combination of computer software and electricity stealing simulator. The computer software is embedded in the database function, and sends instructions to the relay matrix module and the impedance transformation module according to the electricity stealing simulation wiring requirements. The relay matrix module and the impedance transformation module accept the instructions to switch the corresponding relay access impedance and complete the wiring. The output results are displayed on the simulation electric energy meter. .

Correspondingly, the present invention also provides a power stealing simulation simulation device, which can implement the aforementioned power stealing simulation simulation method. details as follows:

Referring to FIG. 3, it is a schematic structural diagram of a first embodiment of a power stealing simulation device provided by the present invention. As shown in FIG. 3, the power stealing simulation device includes: an MCU module 1, a relay matrix module 2 and an impedance transformation module 3;

The MCU module 1 is an embedded single-chip processing unit, which is used to receive the power-stealing parameters set by the client, and after analyzing the power-stealing parameters, transfer the instructions corresponding to the power-stealing parameters through the power-stealing mathematical model database are sent to the relay matrix module 2 and the impedance transformation module 3 respectively.

The relay matrix module 2 is a matrix composed of many relays; it is used to drive the relays according to the instructions of the MCU module 1 to complete the conversion of the wiring mode.

The impedance transformation module 3 is integrated with various resistance resistors, diodes, and inductance coils; it is used to perform voltage division or current limitation through impedance transformation in the voltage loop or current loop according to the instructions of the MCU module 1, so that the voltage loop The voltage value loaded on the simulated energy meter is lower than the actual normal voltage value, and the current value in the current loop is lower than the actual normal current value.

From a practical point of view, the power stealing simulation device provided by the present invention is as close as possible to the actual production site, and highly simulates and demonstrates the power stealing process and anti-theft process of various user metering devices on site. The power stealing simulation device provided by the present invention can simulate and restore various power stealing means, and realize the simulation of mainstream, typical and high-tech power stealing methods, so as to achieve the current situation of on-site personnel training for power supply enterprises, and solve on-site Insufficient field experience of personnel and weak anti-stealing skills.

Referring to FIG. 4 , it is a schematic structural diagram of a second embodiment of a power stealing simulation device provided by the present invention. In this embodiment, the specific structure and implementation of each functional module in the electricity stealing simulation simulation device will be described in more detail. As shown in Figure 4, the power stealing simulation device includes: MCU module 1, relay matrix module 2 and impedance transformation module 3; for the convenience of description, in some contexts, MCU module 1, relay matrix module 2 and The impedance transformation module 3 is collectively referred to as a "stealing electricity simulator".

The MCU module 1 of the electric stealing simulator can send instructions to each relevant internal module after analysis according to the requirements of the client (PC, single-chip) human-computer interaction interface software parameter setting, and switch to the corresponding electric stealing simulation mode. The internal relay matrix module 2 is combined according to the software dynamic database commands to simulate a variety of power-stealing wiring methods to meet the flexible and diverse requirements of the anti-stealing method simulation of the metering device. Impedance transformation module 3 simulates voltage and current output amplitudes and phase angles by transforming impedance values according to software dynamic database commands.

The MCU module 1 is an embedded single-chip processing unit, which is used to receive the power stealing parameters set by the client, and after analyzing the power stealing parameters, transfer the instructions corresponding to the power stealing parameters through the power stealing mathematical model database are sent to the relay matrix module 2 and the impedance transformation module 3 respectively. More specifically, in this embodiment, the user can select electricity stealing parameters at the client end (PC end). The main parameters are wiring mode (single-phase wiring, three-phase four-wire, three-phase three-wire wiring mode), electricity stealing type (voltage loss, current loss, phase shift, meter internal counting, etc.), analog electricity stealing point, voltage and current Output amplitude, phase, etc. The MCU module 1 then receives the electricity-stealing parameters set by the user on the client side, and then the MCU module 1 analyzes the electricity-stealing parameters, and calls the instructions corresponding to the electricity-stealing parameters in the electricity-stealing mathematical model database, and sends them to the relay The matrix module sends the wiring mode command; sends the analog stealing type command, the simulated power stealing point command, the voltage command, the current command, the phase command, etc. to the impedance transformation module.

The relay matrix module 2 is a matrix composed of many relays; according to the instructions sent by the MCU module 1, through the action of the relay matrix related relays, the corresponding voltage and current loops are connected to complete the transformation of the wiring mode, such as single phase, three-phase three-wire, three-phase four-wire, etc.

The impedance transformation module 3 is integrated with various resistance resistors, diodes, and inductance coils; it is used to perform voltage division or current limitation through impedance transformation in the voltage loop or current loop according to the instructions of the MCU module 1, so that the voltage loop The voltage value loaded on the simulated energy meter is lower than the actual normal voltage value, and the current value in the current loop is lower than the actual normal current value, which affects the correct measurement of the energy meter and achieves the purpose of electricity stealing demonstration.

In addition, the power stealing simulation device also includes: a power stealing mathematical model database module 4, a control output module 5, a protection module 6, a power supply module 7, and a communication module 8 for completing information interaction between various modules in the device. Fig. 5 is a schematic diagram of a power stealing simulation device provided by an embodiment of the present invention.

The electricity-stealing mathematical model database module 4 is an important module. In order to facilitate the public and those skilled in the art to understand and implement the technical solution provided by the present invention, the electricity-stealing mathematical model database is further explained and illustrated as follows.

From the basic metering principle and electric power (P=UIcosΦ) of the electric energy meter, it can be known that whether an electric energy meter can be measured correctly is determined by the product of the three elements of voltage, current, power factor and time, and the correctness of installation and wiring. Therefore, breaking any one of these conditions can make the energy meter run slowly, stop or even reverse, so as to achieve the purpose of stealing electricity.

According to the conditions of electric energy metering, combined with the components of electric energy metering, it can be attributed to the influence of the following three wiring elements: voltage transformer (TV) wiring, current transformer (TA) wiring, and electric energy meter tail wiring. In the case of stable power supply voltage and load, when any wiring element changes, the voltage phasor applied to the voltage coil of the electric energy meter or the current phasor applied to the current coil will also change accordingly, and a certain voltage applied to the electric energy meter The voltage phasor or current phasor on a component can be regarded as a mathematical function of the above three elements. Therefore, combined with the change characteristics of voltage, current and power factor of each typical electricity stealing method, through P=UIcosΦ(P: active power, the unit is kW; U: voltage effective value, the unit is kV; I: voltage effective value, The unit is A; cosΦ is the power factor) This function can establish a database of electric stealing mathematical models describing electric energy metering wiring.

Establish a mathematical model database for stealing electricity, design the switching of actual wiring methods, design and develop computer operating software, and transform the previous manual wiring method into a combination of computer software and electricity stealing simulation hardware platform. When a variable input by the client changes, the MCU module can calculate the phase relationship and amplitude relationship between voltages and currents according to the electricity stealing mathematical model database, so as to obtain various combinations of wiring diagrams and phasors. Graphs, power expressions and correction factors.

According to the electricity stealing mathematical model database, we realize it through the combination of computer software and electricity stealing simulator. The computer software is embedded in the database function, and sends instructions to the relay matrix module and the impedance transformation module according to the electricity stealing simulation wiring requirements. The relay matrix module and the impedance transformation module accept the instructions to switch the corresponding relay access impedance and complete the wiring. The output results are displayed on the simulation electric energy meter. .

The control output module 5 is used to output the parameters of voltage, current and phase in the circuit built by the relay matrix module and the impedance transformation module to the simulated electric energy meter.

The protection module 6 is used to perform overall leakage detection, overcurrent detection, grounding detection, etc. on each output of the control output module, and notify the MCU module to send an alarm signal and automatically cut off the input power of the power module if any abnormality is found. The power supply module 7 is powered by the mains power supply to each power stealing simulator after passing through the isolated power supply module and the dynamic monitoring control module. The protection module 6 has an overload protection function and an electric leakage protection function. The output of this module directly acts on the power supply circuit, and this technology can effectively protect equipment and operators. In order to ensure safety, the power supply of the device is isolated, so that no loop can be formed between the ground and the isolated power supply stage. Through the dynamic protection power isolation technology, the personal safety of equipment can be effectively protected. It is a safety barrier for equipment, and it provides reliable safety protection under correct operation conditions. The three-phase five-wire power supply provides working power to the device through the main power circuit breaker and the power isolation protection module. Input to the fault simulator, and realize the output to the electric energy meter terminal through the transformation of the wiring mode.

The power supply module 7 is used to connect the three-phase mains power to the power stealing simulation device, and perform rectification and filtering control on the three-phase mains power.

Those skilled in the art can understand that, according to the hardware organization structure, the electricity stealing simulation simulation device provided by the present invention adopts the active control of the software in the MCU module, that is, the software in the MCU module actively reports to the protection module of the electricity stealing simulator in real time. state, if an abnormality is found, the protection mode will be automatically activated to cut off the source circuit. When there is no abnormality, the software sends it to the electric stealing simulator according to the wiring mode set by the operation, and the software outputs the power according to the instruction.

According to the above functional requirements, the software design is divided into serial communication module, database module, communication protocol module, interface view module, etc. The functions of each module are as follows:

Serial communication module: This module is mainly responsible for the data communication between the software and the F86 cabinet (single-chip microcomputer). Send the prepared command to the cabinet, and the cabinet executes corresponding actions according to the command analysis; or receives the data returned by the cabinet.

Database module: This module is mainly responsible for various faults according to the requirements, generating data instructions according to the communication protocol specification and storing them in the database for software use.

Communication protocol module: This module is mainly responsible for calling corresponding instructions from the database according to the user's choice, and then encapsulating according to the communication protocol to generate the most complete data package. It is sent to the cabinet by the serial port communication module. Or, after the serial port communication module receives the data packet, it transfers it to this module, analyzes it according to the communication protocol, and displays it on the delivery interface.

Interface View Module: This module is mainly responsible for some functional selection, control, and result display, including the selection and control of single-phase stealing simulation; the selection and control of three-phase three-wire stealing simulation; three-phase four-wire and its typical stealing Selection and control of electrical simulation; copying of instantaneous information of electric energy meters and display of results, etc.

The electric stealing simulation device provided by the present invention develops corresponding control software according to the working logic of each module and the established electric stealing simulation mathematical model library, and realizes electric stealing simulation control based on the electric stealing simulation mathematical model library. Through the software setting, the electric stealing simulation equipment can be controlled to automatically simulate various forms of electric stealing methods of the metering device. The working logic of the module is shown in Figure 7.

The power stealing simulation device provided by the present invention realizes man-machine dialogue through the interface view module, and configures the power source form on the view interface, and sets the power stealing method, and calls the power stealing simulation mathematical model by communicating with the database module to control The simulated electric energy meter is used to simulate electricity stealing, and the program control logic is shown in Figure 7.

The power stealing simulation device and method provided by the present invention can realize the power stealing simulation functions as follows:

1. Single-phase electric energy meter stealing simulation function

(1) The way of stealing electricity where the electricity stealing point is in the electric energy meter:

Normal, voltage coil disconnected, voltage coil connected with diode, voltage coil connected with resistor, current coil reversed, zero fire reversed, current coil shorted, two households united.

(2) The stealing method of the electricity stealing point in the voltage transformer:

Normal, disconnected, series diodes, series resistance, reverse connection, reverse series diodes, reverse series resistance, the voltage is measured by the low end of CT.

(3) The stealing method of the electricity stealing point in the current transformer:

Normal, disconnected, series diodes, series resistors, reverse connection, reverse connection series diodes, reverse series connection resistors, change ratio, change ratio series diodes, change ratio series resistors, change ratio and reverse connection, change ratio And connect the series of diodes in reverse, replace the transformation ratio and connect the series of resistors in reverse, and short-circuit the transformer.

2. Three-phase three-wire electric energy meter stealing simulation function

(1) The way of stealing electricity where the electricity stealing point is in the electric energy meter:

Normal, current coil short circuit, voltage coil disconnected, voltage coil connected with diode, voltage coil connected with resistor, current coil reversed.

(2) The stealing method of the electricity stealing point in the voltage transformer:

Normal, disconnected, series diodes, series resistors, change voltage phase sequence.

(3) The stealing method of the electricity stealing point in the current transformer:

Normal, series diode, series resistance, reverse connection, reverse series diode, reverse series resistance, transformation ratio, transformation ratio series diode, transformation ratio series resistance, transformation ratio reverse connection, transformation ratio reverse connection series diode , Transformation ratio Reverse series resistance, disconnection, short circuit at the end of the meter, secondary short circuit of transformer, change of current phase sequence.

3. Three-phase four-wire electric energy meter stealing simulation function

(1) The way of stealing electricity where the electricity stealing point is in the electric energy meter:

Normal, current coil short circuit, voltage coil disconnection, voltage coil series diode, voltage coil series resistance, current coil reverse connection, change voltage phase sequence.

(2) The stealing method of the electricity stealing point in the voltage transformer:

Normal, disconnection, series diode, series resistance, change voltage phase sequence.

(3) The stealing method of the electricity stealing point in the current transformer:

Normal, series diode, series resistance, reverse connection, reverse series diode, reverse series resistance, transformation ratio, transformation ratio series diode, transformation ratio series resistance, transformation ratio reverse connection, transformation ratio reverse connection series diode , Transformation ratio Reverse series resistance, disconnection, short circuit at the end of the meter, secondary short circuit of transformer, change of current phase sequence.

The power stealing simulation device provided by the invention can make up for the shortcomings of some on-site workers in power supply enterprises who have insufficient experience in anti-power stealing and weak anti-power stealing skills. The device provided by the invention simulates the stealing behavior of changing the wiring mode by establishing a mathematical model, adopts methods such as processing data with an embedded single-chip computer, exchanging data with an integrated communication module and a computer, and supplemented with necessary functions such as protection and control programs. The electric points are respectively stolen from the electric energy meters, voltage transformers, and current transformers of user metering devices such as single-phase meter billing users, three-phase three-wire electric energy meter billing users, and three-phase four-wire electric energy meter billing users. Electrical simulation.

Further, in the device provided by the present invention, its power supply is provided by the mains after passing through the isolated power supply module and the dynamic monitoring control module, and the overload protection function and the leakage protection function are realized through the dynamic monitoring control module. Supplemented by the control program based on the hardware organization structure and the software active control method, the electricity stealing points are respectively divided into single-phase meter billing users, three-phase three-wire electric energy meter billing users, three-phase four-wire electric energy meter billing users, etc. Simulation of power theft methods such as inside the energy meter of the user's metering device, inside the voltage transformer, and inside the current transformer.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in computer-readable storage media. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (10)

1. A simulation method for stealing electricity, is characterized in that, comprises: The microprocessor MCU module receives the power stealing parameters set by the client, and the power stealing parameters include: simulated power stealing type, simulated power stealing point and connection mode, voltage, current, and phase; The MCU module analyzes the electricity-stealing parameters, calls the instructions corresponding to the electricity-stealing parameters in the electricity-stealing mathematical model database, and sends the wiring mode instruction to the relay matrix module, and sends the simulated electricity-stealing type instruction and simulated electricity-stealing instruction to the impedance transformation module. Electric point command, voltage command, current command, phase command; According to the instruction sent by the MCU module, the relay matrix module connects the corresponding voltage and current loop through the action of the relay matrix related relays; According to the instructions sent by the MCU module, the impedance transformation module completes the simulation of the electricity stealing type, electricity stealing point, voltage, current, and phase by adjusting the impedance values of the relevant resistors and inductors in the module. 2. The power stealing simulation method according to claim 1, wherein the impedance transformation module completes the type of power stealing by adjusting the impedance value of the relevant resistance and inductance in the module according to the instruction sent by the MCU module. , Stealing points, and voltage, current, and phase simulations, it also includes: The control output module outputs the voltage, current and phase parameters simulated by the impedance transformation module to the simulated electric energy meter. 3. The power stealing simulation method as claimed in claim 2, characterized in that, in the process of outputting the voltage, current and phase parameters simulated by the impedance transformation module to the simulated electric energy meter by the control output module, the protection module controls the The overall leakage detection, overcurrent detection, grounding detection, etc. are carried out for each output of the output module. If any abnormality is found, the MCU module will send an alarm signal and automatically cut off the input power of the power module. 4. electricity stealing simulation method as claimed in claim 3, is characterized in that, before the electricity stealing parameter that described microprocessor MCU module receives client setting, also comprises: According to the change characteristics of voltage, current and power factor in various ways of stealing electricity, a mathematical model database of stealing electricity is established through the function P=UIcosΦ to describe the connection of electric energy metering; the parameter P is the active power, and the unit is kW; the parameter U is the effective value of the voltage , the unit is kV; the parameter I is the effective value of the current, the unit is A; the parameter cosΦ is the power factor. 5. the electric stealing simulation method as described in any one in claim 1 to 4, it is characterized in that, The types of stealing electricity include: loss of voltage, loss of current, phase shift and/or internal counting of meters; The connection methods include: single-phase connection, three-phase four-wire and/or three-phase three-wire connection; The simulated electric energy meter includes: including single-phase, three-phase three-wire and/or three-phase four-wire simulated electric energy meters. 6. A simulation device for stealing electricity, comprising: an MCU module, a relay matrix module and an impedance transformation module; The MCU module is an embedded single-chip processing unit, which is used to receive the power-stealing parameters set by the client, and after analyzing the power-stealing parameters, transfer the instructions corresponding to the power-stealing parameters through the power-stealing mathematical model database. Send to the relay matrix module and impedance transformation module; The relay matrix module is a matrix composed of many relays; it is used to drive the relay action according to the instructions of the MCU module to complete the conversion of the wiring mode; The impedance transformation module is integrated with various resistance resistors, diodes, and inductance coils; it is used to perform voltage division or current limitation through impedance transformation in the voltage loop or current loop according to the instructions of the MCU module, so that the load in the voltage loop The voltage value at the simulated electric energy meter is lower than the actual normal voltage value, and the current value in the current loop is lower than the actual normal current value. 7. The electricity stealing simulation simulation device as claimed in claim 6, is characterized in that, this device also comprises: The control output module is used to output the parameters of voltage, current and phase in the circuit built by the relay matrix module and the impedance transformation module to the simulated electric energy meter. 8. The electric stealing simulation device as claimed in claim 7, is characterized in that, the device also comprises: The protection module is used to conduct overall leakage detection, over-current detection, grounding detection, etc. for each output of the control output module. If abnormality is found, the MCU module will send an alarm signal and automatically cut off the input power of the power module. 9. electricity theft simulation simulation device as claimed in claim 8, is characterized in that, this device also comprises: The electricity stealing mathematical model database module is used to establish a electricity stealing mathematical model database describing electric energy metering wiring through the function P=UIcosΦ according to the variation characteristics of voltage, current and power factor of various electricity stealing methods. 10. The electric stealing simulation device according to any one of claims 6 to 8, wherein the device further comprises: The power supply module is used to connect the three-phase commercial power to the power stealing simulation device, and perform rectification and filtering control on the three-phase commercial power.