CN211349837U - Electricity stealing simulation device for changing internal devices of meter - Google Patents
Electricity stealing simulation device for changing internal devices of meter Download PDFInfo
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- CN211349837U CN211349837U CN202020016191.1U CN202020016191U CN211349837U CN 211349837 U CN211349837 U CN 211349837U CN 202020016191 U CN202020016191 U CN 202020016191U CN 211349837 U CN211349837 U CN 211349837U
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Abstract
An electricity stealing simulation device for changing internal devices of a meter comprises a simulation meter body, a simulation meter internal module and a simulation electricity stealing unit, the analog meter internal module comprises a CPU main control unit, a meter metering unit, an RTC clock unit, a liquid crystal display unit, a data storage unit and a local communication unit, the CPU main control unit is respectively and electrically connected with the meter metering unit, the RTC clock unit, the liquid crystal display unit, the data storage unit and the local communication unit, the simulation electricity stealing unit is electrically connected with the meter metering unit, the utility model can simulate electricity stealing for changing wiring electricity stealing, changing sampling resistance electricity stealing, cutting sampling chip power source electricity stealing and changing CT transformation ratio electricity stealing module, the system can train workers to know various electricity stealing modes, and improve the electricity stealing investigation capability of the workers.
Description
Technical Field
The utility model relates to an electricity stealing simulation technology field, concretely relates to electricity stealing simulation device is stolen in change of meter gauge internal part.
Background
Along with the continuous development of electric power enterprises, the workload of the electric power enterprises is gradually increased, great challenges are provided for electric power workers, the popularization and application of the intelligent electric energy meter can bring convenience to the electric power workers, the power consumption demand is continuously increased, correspondingly existing power stealing behaviors are in a situation of becoming serious day by day, the power stealing behaviors are not only power consumption demands which harm normal users, but also serious illegal behaviors, and typical behaviors which damage people and benefit people are achieved. At present, electric power enterprises adopt measures for preventing electricity stealing, such as electromagnetic induction and the like, although the electricity stealing prevention effect can be enhanced, the electricity stealing measures are continuously updated, so that the electricity stealing prevention technology still has a leak, and for this reason, in order to maintain the legitimate rights and interests of the electric power enterprises, the discussion of the electricity stealing prevention problem needs to be enhanced, so as to better control and restrict the electricity stealing behavior.
The application of the intelligent electric energy meter enables a user electricity stealing method to be more diversified, and the method is mainly shown in the following aspects: firstly, the phase-shifting electricity stealing method of voltage or current is characterized in that a user reversely connects a voltage coil and a current coil in an intelligent electric energy meter, and realizes phase-staggered wiring by utilizing a voltage loop principle so as to achieve the purpose of electricity stealing.
Disclosure of Invention
Technical problem to be solved
An object of the utility model is to provide an electricity analogue means is stolen in change of meter gauge internal part to mention the actual problem in solving the background art.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an electricity analogue means is stolen in change of meter internal device, steals the electricity unit including simulation ammeter table body, the inside module of simulation table and simulation, the inside module of simulation table includes CPU main control unit, meter measurement unit, RTC clock unit, liquid crystal display unit, data storage unit and local communication unit, the CPU main control unit respectively with meter measurement unit RTC clock unit the liquid crystal display unit the data storage unit with the local communication unit electricity is connected, the electricity unit is stolen in the simulation with meter measurement unit electricity is connected.
Further, the local communication unit comprises RS485 communication and infrared communication.
Furthermore, the simulation electricity stealing unit comprises a wiring electricity stealing module, a sampling resistance electricity stealing module, a sampling chip power supply disconnection electricity stealing module and a CT ratio changing electricity stealing module.
Further, the meter metering unit adopts an AT7022 chip.
Further, the CPU main control unit adopts a low-power consumption 32-bit microprocessor.
(III) advantageous effects
The utility model provides an electricity analogue means is stolen in change of inside device of table meter, the utility model discloses can steal the electricity to change the wiring, change sampling resistance and steal the electricity, disconnected sampling chip power steals electricity and change CT transformation ratio and steal electricity modes such as electricity module and simulate and steal the electricity, can train the staff and know and be familiar with various electricity modes of stealing, improve staff's the ability of stealing the electric reconnaissance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments 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 it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the internal modules of the present invention;
FIG. 2 is a schematic circuit diagram of the present invention;
FIG. 3 is a power supply control circuit diagram of the sampling chip of the meter metering unit of FIG. 2;
FIG. 4 is a circuit diagram of an electric energy sampling and electricity stealing mode of the voltage loop in FIG. 2;
fig. 5 is a circuit diagram of an electric energy sampling and electricity stealing mode of the current loop in fig. 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a meter internal device change electricity stealing simulation device comprises a simulation meter body, a simulation meter internal module and a simulation electricity stealing unit, wherein the simulation meter internal module comprises a CPU (central processing unit) main control unit, a meter metering unit, an RTC (real time clock) unit, a liquid crystal display unit, a data storage unit and a local communication unit, and the CPU main control unit is directly connected with the meter metering unit and used for processing sampling data; the CPU main control unit is directly connected with the RTC clock, so that the clock parameter of the analog electric meter can be ensured to run normally; the CPU main control unit is connected with the liquid crystal display unit, visually displays various data in an interface display mode, is connected with the data storage unit and stores important data and parameters of the meter; the meter metering unit is connected with an external electric energy wire, and is used for collecting real-time voltage and current electric energy, transmitting the sampled data to the CPU main control unit and analyzing the data; the meter metering unit is also directly connected with a meter internal simulation electricity stealing unit and is used as an electricity stealing data acquisition module for simulating an actual field; the meter metering unit performs numerical value calibration on sampling data of voltage, current and power of the analog electric meter, the RTC clock unit is connected with the CPU main control unit and receives a timing instruction to ensure that a data acquisition task is performed on time, and the liquid crystal display unit is connected with the CPU main control unit and displays various acquired data and meter parameters in turn; the liquid crystal display unit has a backlight function, the backlight is controlled by the CPU, and the data storage unit is connected with the CPU main control unit and stores electric energy acquisition data; the data storage unit also stores meter parameters and working states of the analog meter; the data storage unit has the function of preventing power failure data from being lost, and the local communication unit comprises RS485 communication and infrared communication. RS485 communication is a link used by a terminal for collecting analog meter data; the infrared communication is used for eliminating the shortage of people to inquire data and parameters when a fault occurs in the simulation field use.
The CPU main control unit is the core of the whole device system, performs data interaction with each subunit, has working voltage suitable for 3.3V and 5V direct current voltage, is a reliable low-power consumption 32-bit microprocessor, can adapt to the temperature range of minus 40 ℃ to 85 ℃, and has excellent performance.
The RTC clock unit is the running time of a meter and is also standard Beijing time so that the CPU freezes the acquired data according to the day on time, the RTC clock unit adopts an IIC communication protocol, the data transmission is stable and reliable, and when other IIC equipment exists in the system, the accuracy of the data transmission can be ensured so as to ensure that the system clock can not be interfered.
The local communication unit comprises infrared communication and RS485 communication, the infrared communication and the RS485 communication are both established on the basis of UART communication, extra hardware is used, the remote control device has RS485 transmission capability and an infrared communication protocol, in order to ensure that the analog meter can correctly receive and respond to a control command, the communication mode must be stable and reliable, and the remote control device has the function of verifying data frames.
The analog electricity stealing unit comprises a wiring electricity stealing module, a sampling resistance electricity stealing module, a sampling chip power supply disconnection electricity stealing module and a CT transformation ratio electricity stealing module, wherein the wiring electricity stealing is realized by changing the voltage and current wiring in the meter so as to achieve the purpose that the measured data is less than the standard data; the purpose of electricity stealing is achieved by changing the sampling resistance to ensure that the voltage and the current on the line are lower than the standard value; cutting off the power source of the sampling chip to steal electricity refers to a power stealing mode that the power pin of the sampling chip is disabled, so that the sampling chip does not work any more, and the voltage and current values cannot be obtained; changing the CT ratio to steal electricity is a way of steal electricity which reduces the actual current value by times.
Referring to fig. 2, the voltage loop and the current loop belong to the modification of the internal wiring mode of the meter for changing the internal wiring mode of the electricity stealing unit, and mainly focus on voltage wiring and current wiring adjustment. When the three-phase voltage of the analog meter has the conditions of phase error, reverse, phase failure, reverse phase sequence, voltage loss and the like, the data of the electric energy generated by metering is less, and a user finishes the electricity stealing operation; when the three-phase current of the analog meter is in the conditions of reverse direction, phase error, short circuit and the like, the electric energy data generated by metering is less, and therefore a user finishes the electricity stealing operation.
The AT7022 chip is adopted in the meter metering unit control loop in FIG. 3, data of the meter is obtained through the metering chip, and in order to use a more concealed electricity stealing mode, a user may damage a power supply pin of the sampling chip, so that part or all of the electric energy data of the meter is lost.
In the figure, a 5V power supply is connected to a voltage stabilizing chip SP6205EM5-3.3, then 3.3V voltage is output, secondary filtering is carried out through 2 capacitors C2 and C3 to ground (C2:1uF, C3:10uF), the output 3.3V voltage is connected to a relay coil JK1, a control pin CTL1 of a relay JK1 is connected to a CPU main control unit, when the coil of the relay JK1 is controlled to be attracted, a multi-way switch is switched to a standby loop from a VCC loop, the metering unit loses power, and electricity stealing is carried out in a simulated actual pin cut-off mode.
Fig. 4 is a circuit diagram of the voltage sampling loop in fig. 2, in the diagram, the voltage sampling loop is formed by Ua passing through a resistor R11 and then to a voltage transformer PT, the actual size of the output voltage of the secondary loop is determined by R + and R-, and the resistance value after R15 is connected in parallel, R + and R-are formed by a control relay group JK4, the normally open coil of JK4 is respectively connected in series with resistors of different gears, and the larger the resistance value of the series connection is, the higher the obtained voltage gear is. After the gear voltage is output, the gear voltage is connected with R10, R12, R20 and R19 in series-parallel connection, and is subjected to energy storage filtering through capacitors C7 and C8, and then the voltage is output.
In the figure, the state quantity switch controls the V2N and the V2P, the default state is Normally Open (NO), when a control signal is sent, the V2N and the V2P are disconnected, and the action is Normally Closed (NC).
In the figure, V2N and V2P are normal, and the standard output voltage is 220V; when the circuit simulates electricity stealing, the relay set JK4 is controlled to be selectively attracted, when R11 is attracted, the resistance of 1K omega and the resistance of 220 omega are connected in parallel, and the output voltage is about 180V; when R13 is absorbed, two groups of 220 omega resistors are connected in parallel, and the output voltage is about 110V; the output voltage can be obtained by the metering sampling unit in the form of analog quantity, and finally the purpose of stealing electricity is achieved. The design is not limited to UA, including UB and UC, and the simulation electricity stealing can be combined with the current electricity stealing mode.
FIG. 5 is a circuit diagram of the current sampling circuit in FIG. 2, in which CT is a multi-output multi-transformation-ratio CT, the control relay set JK2 is used to control Ia +0 to be connected with Ia + and the transformation ratio output by Ia +0 is the transformation ratio (1.5A: 5mA, 300) measured normally, when the simulated electricity-stealing fault occurs, the control relay set JK2 is used to switch Ia +0 to be disconnected with Ia + so that any one of Ia +1 to Ia +3 is connected with Ia +, Ia +1 is (1.5A: 2.5mA, 600) and Ia +2 is (1.5A: 2mA, 750) and Ia +3 is (1.5A: 1.5mA, 1000), at this time, if the control relay set JK2 is connected with Ia +1 and the input current IA is 1.5A, the secondary side current measured by the sampling circuit is 2.5mA, the sampling circuit is changed to half of the current by the sampling resistor 6R and 6, when the current reaches the metering chip, the acquired current value is half of the original current value, and the effect of simulating the CT transformation ratio to change the electricity stealing is achieved. The design is not limited to A, and comprises IB and IC, and the simulation of electricity stealing can be carried out in combination with a voltage electricity stealing mode.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. The utility model provides a table meter internal part changes electricity stealing analogue means which characterized in that: the electric meter comprises an analog electric meter body, an analog meter internal module and an analog electric larceny unit, wherein the analog meter internal module comprises a CPU main control unit, a meter metering unit, an RTC clock unit, a liquid crystal display unit, a data storage unit and a local communication unit, the CPU main control unit is respectively connected with the meter metering unit, the RTC clock unit, the liquid crystal display unit, the data storage unit and the local communication unit are electrically connected, and the analog electric larceny unit is electrically connected with the meter metering unit.
2. The electricity stealing simulation device for changing the internal devices of the meter according to claim 1, wherein: the local communication unit comprises RS485 communication and infrared communication.
3. The electricity stealing simulation device for changing the internal devices of the meter according to claim 1, wherein: the analog electricity stealing unit comprises a wiring electricity stealing changing module, a sampling resistance electricity stealing changing module, a sampling chip power supply disconnection electricity stealing module and a CT transformation ratio electricity stealing changing module.
4. The electricity stealing simulation device for changing the internal devices of the meter according to claim 1, wherein: the meter metering unit adopts an AT7022 chip.
5. The electricity stealing simulation device for changing the internal devices of the meter according to claim 1, wherein: the CPU main control unit adopts a low-power consumption 32-bit microprocessor.
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| CN202020016191.1U CN211349837U (en) | 2020-01-06 | 2020-01-06 | Electricity stealing simulation device for changing internal devices of meter |
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| CN202020016191.1U CN211349837U (en) | 2020-01-06 | 2020-01-06 | Electricity stealing simulation device for changing internal devices of meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542076A (en) * | 2020-12-04 | 2021-03-23 | 广东电网有限责任公司江门供电局 | Anti-electricity-stealing skill training device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542076A (en) * | 2020-12-04 | 2021-03-23 | 广东电网有限责任公司江门供电局 | Anti-electricity-stealing skill training device |
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