CN215007142U - Electricity stealing simulator based on effect comparison of two current transformers - Google Patents
Electricity stealing simulator based on effect comparison of two current transformers Download PDFInfo
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- CN215007142U CN215007142U CN202121341193.9U CN202121341193U CN215007142U CN 215007142 U CN215007142 U CN 215007142U CN 202121341193 U CN202121341193 U CN 202121341193U CN 215007142 U CN215007142 U CN 215007142U
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Abstract
The utility model provides an electricity stealing analogue means based on two kinds of current transformer effect contrast, include: the power module, the single-phase voltage regulator, the transformer and the rectifier are connected in sequence; the rectifier is respectively connected with the first current transformer and the second current transformer; the first current transformer is connected with the first electric energy meter; the second current transformer is connected with the second electric energy meter. The device of the utility model is simple in structure, can show the principle and can carry out anti-theft demonstration and data show directly perceived again, and the portability is considerable understandable.
Description
Technical Field
The utility model relates to an electricity-stealing analogue means technical field, specific theory relates to an electricity-stealing analogue means based on two kinds of current transformer effect contrast.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The social harmfulness of electricity stealing is great, the legal rights and interests of power supply enterprises are damaged, and a great amount of loss and economic loss of national assets are caused. Therefore, electricity stealing is not only related to the economic benefit and public image of power supply enterprises, but also related to the safety of the whole power grid and the harmony and stability of the society. At present, the electricity stealing means are increasingly high-tech, industrialized and concealed, and in the face of severe electricity stealing situation, electricity utilization inspectors need to be updated and improved in time on electricity stealing prevention knowledge and skills so as to meet the new requirement of electricity stealing prevention situation and achieve the purposes of reducing loss and improving efficiency.
Series half-wave rectification type electricity stealing is a novel electricity stealing means newly discovered in recent years, and the signal waveform of alternating current is changed by installing pseudo energy-saving equipment on a main loop, so that the normal sine wave of the main loop is converted into a half-wave state, and the signal waveform of a secondary metering loop is distorted, so that the metering of less electric energy is realized. This electricity-stealing equipment mountable is in the arbitrary position of measurement return circuit rear end, load equipment anterior segment, and the electricity-stealing means is extremely hidden, and the common high power supply of electricity-stealing gimmick is low to count special change user or take mutual-inductor power user, and traditional electricity-stealing means is difficult to discover. At present, how to train a novel electricity stealing principle and an electricity stealing prevention technology for power workers in charge of electricity utilization inspection and measurement posts and students in the technical specialty of electricity supply and utilization through a vivid intuitive and easy-to-copy and popularization form is still a difficult problem to be solved urgently.
Because a current transformer is required to be involved in the electricity stealing simulation process, once a secondary open circuit occurs, the equipment and personal safety can be threatened; the simulation site adopts a variable-frequency high-power energy-saving cabinet, the weight is hundreds of jin, the volume is large, the use is inconvenient, and the variable-frequency high-power energy-saving cabinet is not suitable for being used as a teaching aid; in the prior art, a clamp meter is adopted to measure current data of a secondary side of a transformer mostly, the clamp meter can only read a current value, and only inconsistency between a transformation ratio and a nameplate can be found even if primary current and secondary current of the current transformer are compared, so that a distorted waveform cannot be displayed. The three-phase four-wire metering electric energy meter has the problems of complex wiring, complex three-phase full-wiring process, difficult line display and difficult training.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned problem, provided the electricity stealing analogue means based on two kinds of current transformer effect contrast, can show the principle and can carry out the demonstration of preventing stealing and data show directly perceived again, and convenient to carry.
In order to achieve the above object, in some embodiments, the present invention adopts the following technical solutions:
steal electric analogue means based on two kinds of current transformer effect contrast includes: the power module, the single-phase voltage regulator, the transformer and the rectifier are connected in sequence; the rectifier is respectively connected with the first current transformer and the second current transformer; the first current transformer is connected with the first electric energy meter; the second current transformer is connected with the second electric energy meter.
The A, B, C three-phase meter tail end series connection of first electric energy meter, the A, B, C three-phase terminal of the first electric energy meter of coil secondary side output series connection of first current transformer to the three-phase current is the same, and the electric energy meter realizes normal electric energy measurement.
The A, B, C three-phase meter tail end series connection of second electric energy meter, the A, B, C three-phase terminal of second electric energy meter of coil secondary side output series connection of second current transformer to the three-phase current is the same, and the electric energy meter realizes normal electric energy measurement.
The first current transformer is a DBI current transformer, and the second current transformer is a low-voltage current transformer.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the device of the utility model is simple in structure, can show the principle and can carry out anti-theft demonstration and data show directly perceived again, and the portability is considerable understandable.
(2) The utility model discloses a transformer rises and flows device and MDC rectifier access circuit and simulate on-the-spot electricity stealing device "energy-conserving cabinet", uses the rectifier to simulate on-the-spot "energy-conserving cabinet" to the distortion of circuit current, spreads into the half-wave direct current that causes the rectifier into the circuit in, makes ordinary current transformer magnetic circuit saturation to reach the effect that the on-the-spot influence of simulation was measured. In this way, the energy-saving cabinet which is heavy and huge on site is replaced by a light and easily obtained finished product, so that the experimental device is greatly simplified, and the daily teaching work is more convenient.
(3) Two three-phase four-wire intelligent electric energy meters with the same batch model are connected into an experimental circuit to simulate a field metering electric energy meter, the electric energy meter is divided into independent ABC three phases, the three phases are connected in series with the same current in the experiment, and the three-phase current is balanced. Therefore, wiring is greatly simplified under the condition of restoring the site, and the mutual inductor is saved. And meanwhile, data of the two groups of electric energy meters are used for realizing comparison, and the actual effects of electricity stealing and electricity anti-stealing are intuitively displayed.
(4) A current transformer with the current transformation ratio of 150A/5A or 100A/5A or 200/5 is adopted, so that the current is really simulated on site; and meanwhile, the magnetic circuit is easier to saturate, and the field condition can be recovered even if a rectifier is used for simulation.
(5) The utility model discloses a promotion cluster direct current steals precaution of electricity, improves national energy measurement degree of accuracy, reduces the power supply line loss and improves power supply efficiency and provides effective service. Promote high energy consumption and high pollution enterprise's technical upgrade, energy saving and emission reduction reduces to steal the electric in order to guarantee fair product competition market, realizes carbon neutralization, promotes the carbon and reaches the peak to the realization is used for the staff training of various electric power staff electricity inspection measurement posts, and student's anti-electricity-stealing training of student and vocational education supply and utilization of electricity technology direction more can integrate into ripe modularization teaching aid.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which form a part of the specification, are provided to provide a further understanding of the invention, and are included to explain the illustrative embodiments and the description of the invention, and not to constitute a limitation of the invention.
Fig. 1 is the utility model discloses in the embodiment of the utility model discloses steal electric analogue means structure sketch map based on two kinds of current transformer effect contrast.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise. It should be noted that, in the present invention, the features of the embodiments and the examples may be combined with each other without conflict. The embodiments will be described in detail below with reference to the accompanying drawings.
Example one
According to the utility model discloses an embodiment discloses an electricity stealing analogue means's embodiment based on two kinds of current transformer effect contrast, refer to figure 1, include: the power module, the single-phase voltage regulator, the transformer and the rectifier are connected in sequence; the rectifier is respectively connected with the first current transformer and the second current transformer; the first current transformer is connected with the first electric energy meter; the second current transformer is connected with the second electric energy meter.
The power supply module comprises an air switch and a leakage protector which are connected in series; the output end of the leakage protector is connected with a single-phase voltage regulator, the embodiment uses a 1000W high-power single-phase voltage regulator, and the rated capacity is 1 KVA. The adjustable range of 0-250V is provided, the voltage can be adjusted according to teaching contents or simulation requirements, the practical situation of series direct current electricity stealing under different voltage levels can be simulated, and the daily teaching requirements can be met. In addition, the conductivity is strong, the resistivity is low, the current waveform is not distorted, and the accuracy of the simulation device can be improved; the heat conductivity is strong, and intensity is high, can use for a long time, can promote the teaching aid security.
The output end of the single-phase voltage regulator is connected with the primary side of the transformer, the secondary side of the transformer is connected with the rectifier, and the transformer is used for increasing current; the embodiment adopts an MDC rectifier access circuit to simulate a rectification part module of an on-site electricity stealing device 'energy-saving cabinet'.
The rectifier is used for changing the signal waveform of alternating current, and the normal sine wave of the main loop is converted into a half-wave direct current state, so that the signal waveform of the secondary metering loop is distorted, and the metering of less electric energy is caused; half-waves caused by the rectifier are transmitted into the circuit to saturate the magnetic circuit of the mutual inductor, so that the effect of simulating field influence on metering is achieved.
In this way, the energy-saving cabinet which is heavy and huge on site is replaced by a light and easily obtained finished product, so that the experimental device is greatly simplified, and the daily teaching work is more convenient.
The output of the rectifier is respectively connected with a first current transformer and a second current transformer; the current transformers with the same current transformation ratio are adopted, and the current transformers with the current transformation ratio of 150A/5A or 100A/5A or 200/5 are adopted, so that the current of a real simulation site is obtained; and meanwhile, the magnetic circuit is easier to saturate, and the field condition can be recovered even if a rectifier is used for simulation.
In this embodiment, the first current transformer is a DBI current transformer; the DBI (DC Bias inductive) direct current magnetic Bias resistant current transformer is an electromagnetic current transformer with metering performance not affected by direct current components in primary current. Therefore, the device has the advantages of strong direct current magnetic biasing resistance and accurate measurement under the condition of high direct current component. The experiment is more accurate and convincing.
The second current transformer adopts a low-voltage common electromagnetic current transformer; adopt DBI current transformer and low-voltage current transformer to carry out the contrast, can more audio-visual contrast experiment effect obvious, both errors exceed more than 50%, switch simply, and the security is high, and the function is novel practical.
A secondary side coil of the first current transformer is connected with the first electric energy meter, and a secondary side coil of the second current transformer is connected with the second electric energy meter; in this embodiment, the first electric energy meter and the second electric energy meter both adopt three-phase four-wire intelligent electric energy meter analog field metering electric energy meters, the electric energy meters are divided into independent ABC three phases, and the output end is connected in series with A, B, C three-phase terminals of the first electric energy meter in this embodiment. Referring to fig. 1, A, B, C three phases at the tail end of the first electric energy meter are connected in series, and the currents are the same. The output end of a secondary coil of the first current transformer is connected with A, B, C three phases of the first electric energy meter in series; therefore, the three-phase currents are the same, and the electric energy meter realizes normal electric energy metering. The same is true for the connection of the second electric energy meter and the second current transformer.
Therefore, wiring is greatly simplified under the condition of restoring the site, and the mutual inductor is saved. And meanwhile, data of the two groups of electric energy meters are used for realizing comparison, and the actual effects of electricity stealing and electricity anti-stealing are intuitively displayed.
The three-phase four-wire intelligent electric energy meter can display real-time data such as electrical degree, current and the like; the data of the series direct current electricity stealing can be visually displayed, and the electricity stealing effect can be simulated and displayed; meanwhile, data of the two electric energy meters are compared, errors are obvious, and electricity stealing simulation effects of the two current transformers can be visually displayed.
The specific working process using the electricity stealing simulation device of the embodiment is as follows:
(1) the air switch is closed, and 220V power supply voltage respectively outputs half waves to a DBI current transformer and a low-voltage current transformer after sequentially passing through a voltage regulator, a transformer and a rectifier;
wherein, the effect of voltage regulator is: adjusting the power supply voltage according to teaching content or simulation requirements, and simulating the actual situation of series direct current electricity stealing under different current values by subsequent current rising;
the transformer has the following functions: the transformer has the function of reverse current rise, so that the primary side small current is changed into the secondary side large current.
The rectifier has the functions of: the signal waveform of the normal alternating current is changed, and the normal sine wave of the main loop is converted into a half-wave state, so that the signal waveform of the secondary metering loop is distorted, and the metering of less electric energy is caused.
The DBI current transformer and the low-voltage current transformer respectively induce half-wave current to the first electric energy meter and the second electric energy meter; the first electric energy meter and the second electric energy meter display the induced voltage and current data and the waveform.
And reading and comparing data in the first electric energy meter and the second electric energy meter, and comparing simulation effects of the DBI current transformer and the low-voltage current transformer while realizing electricity stealing simulation.
The experimental result shows that compared with a common low-voltage current transformer, the DBI current transformer can use a magnetic circuit with small saturation according to experimental environment and conditions, basically measures the current value normally, and can ensure that the error limit can be still ensured when the series half-wave distortion is under a large load. Therefore, the precaution effect is good, the experimental result is displayed accurately, and the comparison is intuitive. Experiments show that compared with a DBI mutual inductor, when the current of the mutual inductor is fully loaded once, the error of the secondary current is about one time, namely, the current is less than half of the metering amount.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (8)
1. Steal electric analogue means based on two kinds of current transformer effect contrast, its characterized in that includes: the power module, the single-phase voltage regulator, the transformer and the rectifier are connected in sequence; the rectifier is respectively connected with the first current transformer and the second current transformer; the first current transformer is connected with the first electric energy meter; the second current transformer is connected with the second electric energy meter.
2. The electricity stealing simulation device based on effect comparison of two current transformers as claimed in claim 1, wherein the A, B, C three-phase meter tail ends of the first electric energy meter are connected in series, the coil secondary side output end of the first current transformer is connected in series with the A, B, C three-phase terminal of the first electric energy meter, so that the three-phase currents are the same, and the electric energy meter realizes normal electric energy metering.
3. The electricity stealing simulation device based on effect comparison of two current transformers as claimed in claim 1, wherein the A, B, C three-phase meter tail ends of the second electric energy meter are connected in series, the coil secondary side output end of the second current transformer is connected in series with the A, B, C three-phase terminal of the second electric energy meter, so that the three-phase currents are the same, and the electric energy meter realizes normal electric energy metering.
4. The electricity stealing simulation device based on effect comparison of two current transformers according to claim 1, wherein the first current transformer is a DBI current transformer.
5. The electricity stealing simulation device based on effect comparison of two current transformers according to claim 1, wherein the first current transformer is a low voltage current transformer.
6. The electricity stealing simulation device based on effect comparison of two current transformers according to claim 1, wherein the first electric energy meter and the second electric energy meter are both three-phase four-wire intelligent electric energy meters.
7. The electricity stealing simulation apparatus based on effect comparison of two current transformers according to claim 1, wherein the current ratios of the first current transformer and the second current transformer are identical, and the current ratios include: 150/5, 100/5, or 200/5.
8. The electricity stealing simulation device based on effect comparison of two current transformers according to claim 1, wherein the power supply module comprises: an air switch and a leakage protector which are connected with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121341193.9U CN215007142U (en) | 2021-06-16 | 2021-06-16 | Electricity stealing simulator based on effect comparison of two current transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121341193.9U CN215007142U (en) | 2021-06-16 | 2021-06-16 | Electricity stealing simulator based on effect comparison of two current transformers |
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| Publication Number | Publication Date |
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| CN215007142U true CN215007142U (en) | 2021-12-03 |
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| CN202121341193.9U Expired - Fee Related CN215007142U (en) | 2021-06-16 | 2021-06-16 | Electricity stealing simulator based on effect comparison of two current transformers |
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2021
- 2021-06-16 CN CN202121341193.9U patent/CN215007142U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211203 |
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| CF01 | Termination of patent right due to non-payment of annual fee |