CN105044450A - Metering error analysis device and method - Google Patents

Abstract

The invention provides a metering error analysis device and method, the method comprising: applying a virtual load voltage and current to a standard electric energy meter and an electricity stealing demonstration electric energy meter; Various wiring on site; input the electric energy measurement high-frequency pulse of the power-stealing demonstration electric energy meter to the pulse input port of the metering error calculator; input the standard electric energy metering high-frequency pulse to the standard pulse of the metering error calculator Access port; calculate the measurement error between the standard electric energy meter and the electric energy metering high-frequency pulse output by the electricity stealing demonstration electric energy meter. The metering error analysis device and method provided by the present invention can not only be used for the training of electricity inspectors to improve their anti-stealing ability, but also play a certain auxiliary role in the determination of supplementary electricity.

Description

A measurement error analysis device and method

technical field

The invention relates to the field of electric power technology, in particular to a measurement error analysis 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 are becoming more and more hidden, and the behavior of stealing electricity by using high-tech means such as wireless remote control is becoming more and more serious. Rampant and spreading. 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, for the majority of electricity inspectors in power supply companies, especially the newly promoted inspectors, the anti-stealing experience in investigating and handling high-tech cases such as remote-control electricity theft is still insufficient, and the anti-stealing skills need to be improved. In particular, the ability to judge the corresponding way of stealing electricity by analyzing data such as measurement errors needs to be improved.

Contents of the invention

The metering error analysis device and method provided by the present invention proceed from a practical point of view and are as close as possible to the actual production site. Common and typical methods of stealing electricity, such as remote-controlled electric energy meters, remote-controlled CTs, remote-controlled junction boxes, and damaged electric meters, are used in the experimental Through the demonstration and analysis of measurement errors, the measurement errors caused by various electricity stealing methods are displayed intuitively by means of comparison and display on the display screen, so as to find out the rules and provide a scientific basis for the research and analysis of anti-electricity theft measures. with the platform.

The measurement error analysis device and method provided by the present invention can not only test and analyze the measurement error of the electric energy meter, but also be used for the training of electricity inspectors, so that the trainers can understand the impact of various electricity theft methods on the accuracy of measurement in a relatively short period of time. It can also play a certain auxiliary role in the determination of supplementary power, and improve the efficiency and results of anti-stealing work.

In order to solve the above technical problems, the present invention provides a measurement error analysis device, including:

Virtual load electronic source, used to apply virtual load voltage and current to the standard electric energy meter and electric stealing demonstration electric energy meter;

The standard electric energy meter is connected with the measurement error calculator, and is used to input the standard electric energy measurement high-frequency pulse into the standard pulse input port of the measurement error calculator when demonstrating the measurement error;

Electricity stealing demonstration electric energy meter is connected through the wiring fault switch box, transformer box and virtual load electronic source, and is used to input the high-frequency pulse of its own electric energy measurement to the pulse input port of the measurement error calculator when demonstrating the measurement error ;

Fault switching box and transformer box are used to set the wrong wiring mode of the meter tail of the electricity stealing demonstration electric energy meter, and simulate various wiring on the scene, including but not limited to three-phase three-wire high voltage meter, three-phase four-wire high and low voltage Electric energy meter, voltage transformer secondary wiring, current transformer secondary wiring;

The metering error calculator is used to calculate the metering error between the standard electric energy meter and the electric energy metering high-frequency pulse output by the electricity stealing demonstration electric energy meter.

Wherein, the transformer box includes: a voltage transformer and a current transformer; the transformer box is also used to simulate whether the voltage transformer and the current transformer are grounded or not.

Wherein, the virtual load electronic source has an output voltage range of 0.0V to 380.0V, an output current range of 0.0A to 5.0A, an output frequency range of 45.0Hz to 65.0Hz, and a phase of 0.00° to 359.99°.

Wherein, the error between the standard watt-hour meter measured by the metering error calculator and the electricity-stealing demonstration watt-hour meter includes the error of active power and the error of reactive power, and the standard watt-hour meter and the electricity-stealing demonstration watt-hour meter are for inductive load and error for capacitive loads.

Wherein, the voltage and current input terminals of the power-stealing demonstration watt-hour meter are equipped with a phase volt-ampere detection module for real-time detection of loop voltage and current. When the voltage and current loop fails, the phase volt-ampere detection module uploads Loop alarm information, and lower the output corresponding to the fault table.

Wherein, the metering error analysis device also includes: a display module, which is used to display the comparison of each operating parameter and the chart in the stealing state on the demonstration interface, including the error calculated by the metering error calculator, as well as the standard electric energy meter and the stealing power meter. Demonstrate the meter tail voltage, current amplitude, phase and power of the electric energy meter.

Correspondingly, the present invention also provides a measurement error analysis method, including:

Apply virtual load voltage and current to the standard electric energy meter and the electricity stealing demonstration electric energy meter;

Set up the wrong connection mode of the meter tail of the electricity stealing demonstration electric energy meter, and simulate various connections on the scene;

Inputting the electric energy measurement high-frequency pulse of the electricity-stealing demonstration electric energy meter into the pulse inlet of the metering error calculator; inputting the standard electric energy metering high-frequency pulse into the standard pulse inlet of the metering error calculator;

The measurement error between the standard electric energy meter and the electric energy metering high-frequency pulse output by the electricity stealing demonstration electric energy meter is calculated.

Wherein, the voltage range of the virtual load voltage and current applied to the standard electric energy meter and the electricity stealing demonstration electric energy meter is 0.0V to 380.0V, the output current range is 0.0A to 5.0A, the output frequency range is 45.0Hz to 65.0Hz, and the phase is 0.00 o to 359.99o.

Wherein, after the calculation of the metering error between the two according to the electric energy metering high-frequency pulse output of the standard electric energy meter and the electricity-stealing demonstration electric-energy meter output, it also includes: the contrast between each operating parameter and the graph under the electricity-stealing state displayed on the demonstration interface , including the error calculated by the metering error calculator, as well as the meter tail voltage, current amplitude, phase and power of the standard energy meter and the power-stealing demonstration energy meter.

Wherein, the measurement error analysis method further includes: detecting the loop voltage and current in real time, and when the voltage and current loop fails, the phase volt-ampere detection module uploads the loop alarm information, and lowers the output corresponding to the fault indicator.

The present invention also provides a metering error analysis device and method applied to the meter tail voltage and current as dummy load voltage and current with adjustable amplitude, phase and frequency, simulating electric energy metering circuit, and for current transformer (TA) wiring, It can realize the setting of wiring functions such as incomplete star connection, phase line short connection of complete star connection, common line disconnection, and two-phase TA secondary circuit series connection; for voltage transformer (TV) wiring, it can be realized V-V wiring (composed of two single-phase TVs), Y-Y wiring (composed of a single three-phase four-wire TV), primary phase failure, secondary phase failure, primary polarity reverse connection, secondary polarity reverse connection and pressure It can simulate the actual wiring of the electricity-stealing site, or change the electricity-stealing mode of the internal components of the electric energy meter, and automatically measure the error data. It has the function of measuring the stealing ability of the electricity-stealing appliance. The analysis of successive power data can determine the impact of the application of electrical stealing appliances on measurement errors, thereby judging their electrical stealing capabilities.

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 structural schematic diagram of the first embodiment of the measurement error analysis device provided by the present invention;

Fig. 2 is a schematic structural diagram of the second embodiment of the measurement error analysis device provided by the present invention;

Fig. 3 is the schematic structural diagram of the voltage transformer in the metering error analysis device provided by the present invention;

Fig. 4 is the schematic structural diagram of the current transformer in the metering error analysis device provided by the present invention;

5 is a schematic flow chart of the first embodiment of the measurement error analysis method provided by the present invention;

Fig. 6 is a schematic flow chart of the second embodiment of the measurement error analysis method provided by the present invention.

Detailed ways

The metering error analysis device and method provided by the present invention proceed from a practical point of view and are as close as possible to the actual production site. Common and typical methods of stealing electricity, such as remote-controlled electric energy meters, remote-controlled CTs, remote-controlled junction boxes, and damaged electric meters, are used in the experimental Through the demonstration and analysis of measurement errors, the measurement errors caused by various electricity stealing methods are displayed intuitively by means of comparison and display on the display screen, so as to find out the rules and provide a scientific basis for the research and analysis of anti-electricity theft measures. with the platform.

The measurement error analysis device and method provided by the present invention can not only test and analyze the measurement error of the electric energy meter, but also be used for the training of electricity inspectors, so that the trainers can understand the impact of various electricity theft methods on the accuracy of measurement in a relatively short period of time. It can also play a certain auxiliary role in the determination of supplementary power, and improve the efficiency and results of anti-stealing work.

Referring to Fig. 1, it is a schematic structural diagram of the first embodiment of the metering error analysis device provided by the present invention. As shown in the figure, the metering error analysis device includes: a virtual load electronic source 1, a standard electric energy meter 2, an electricity stealing demonstration electric energy meter 3, Failover box 4, transformer box 5, measurement error calculator 6.

The dummy load electronic source 1 is used to apply dummy load voltage and current to the standard watt-hour meter 2 and the power-stealing demonstration watt-hour meter 3 .

The standard electric energy meter 2 is connected with the metering error calculator 6, and is used for inputting standard electric energy metering high-frequency pulses to the standard pulse input port of the metering error calculator 6 when demonstrating the metering error.

Electricity theft demonstration electric energy meter 3 is connected through wiring fault switching box 4, transformer box 5 and virtual load electronic source 1, and is used to input its own electric energy measurement high-frequency pulse to the measurement error calculator when demonstrating measurement error pulse input port.

The fault switching box 4 and the transformer box 5 are used to set the wrong wiring mode of the meter tail of the electricity stealing demonstration electric energy meter 3, and simulate various wirings on the scene, including but not limited to three-phase three-wire high-voltage meters, three-phase four-wire High and low voltage watt-hour meters, secondary wiring of voltage transformers, secondary wiring of current transformers.

The metering error calculator 6 is used to calculate the metering error between the standard electric energy meter 2 and the electric energy metering high-frequency pulse outputted by the electricity stealing demonstration electric energy meter 3 .

The measurement error analysis device provided by the present invention can test and analyze the measurement error of the electric energy meter. It can not only be used for the training of electricity inspectors, but also enable the trainers to understand the degree of influence of various means of stealing electricity on the accuracy of measurement in a relatively short period of time. , improve its anti-stealing ability; it can also play a certain auxiliary role in the determination of supplementary electricity, and improve the efficiency and results of anti-stealing work.

Referring to FIG. 2 , it is a schematic structural diagram of the second embodiment of the measurement error analysis device provided by the present invention. In this embodiment, the function and structure of each module of the measurement error analysis device will be described in more detail. As shown in the figure, the metering error analysis device includes: a virtual load electronic source 1 , a standard electric energy meter 2 , an electricity stealing demonstration electric energy meter 3 , a fault switch box 4 , a transformer box 5 , and a metering error calculator 6 .

The dummy load electronic source 1 is used to apply dummy load voltage and current to the standard watt-hour meter 2 and the power-stealing demonstration watt-hour meter 3 . The virtual load electronic source 1 has an output voltage range of 0.0V to 380.0V, an output current range of 0.0A to 5.0A, an output frequency range of 45.0Hz to 65.0Hz, and a phase of 0.00o to 359.99o. The voltage and current applied to the end of the meter by the virtual load electronic source 1 are the virtual load voltage and current, the amplitude, phase and frequency are adjustable, and meet the requirements of technical indicators. More specifically, the virtual load electron source 1 in this embodiment can use the WT-FY50 program-controlled electron source in actual use, and its technical indicators are: operating environment: temperature: -10°C ~ +40°C; humidity: ≤ 85 altitude: below 4000m; input power: single-phase 220V±10%, 50Hz±0.2Hz; output voltage range: 57.7V, 100V, 220V, 380V; output current range: 0.5A, 1A, 1.5A, 2.5 A, 5A; output frequency range: 45~65Hz, adjustment fineness: <0.01Hz; phase: 0~359.9°; adjustment fineness 0.1°; phase adjustment accuracy: 0.5°.

The standard electric energy meter 2 is connected with the metering error calculator 6, and is used for inputting standard electric energy metering high-frequency pulses to the standard pulse input port of the metering error calculator 6 when demonstrating the metering error. More specifically, in the embodiment of the present invention, the standard electric energy meter 2 may be a high-precision three-phase standard electric energy meter WT-B3E5, and its error accuracy is less than 0.1%.

Electricity theft demonstration electric energy meter 3 is connected through wiring fault switching box 4, transformer box 5 and virtual load electronic source 1, and is used to input its own electric energy measurement high-frequency pulse to the measurement error calculator when demonstrating measurement error pulse input port. Further, in the embodiment of the present invention, the metering error analysis device may include 2 or more than 2 power-stealing demonstration electric energy meters 3 . During the electricity stealing demonstration, the pulse output ports of multiple electric energy stealing demonstration energy meters 3 are connected to the measurement error calculator 6 to perform error verification of multiple electric energy meters, and multiple meter positions can simultaneously and independently verify errors .

The fault switching box 4 and the transformer box 5 are used to set the wrong wiring mode of the meter tail of the electricity stealing demonstration electric energy meter 3 . More specifically, each power-stealing demonstration energy meter 3 is correspondingly equipped with a wiring fault switching box 4 . The wiring fault switching box 4 can set the wrong wiring at the end of each meter separately, and can simulate various wiring on the scene, including three-phase three-wire high-voltage meters, three-phase four-wire high-voltage and low-voltage electric energy meters, and voltage transformers TV secondary wiring, current transformer TA secondary wiring, etc., including: three-phase three-wire (via TV, TA wiring, TA simplified wiring, about 129024 kinds); three-phase three-wire (via TV, TA wiring, TA four-wire system , about 516,096 kinds); three-phase four-wire (via TV, TA connection, TA simplified wiring, about 235,929 kinds); three-phase four-wire (via TV, TA connection, TA six-wire system, about 235,929 kinds); Three-phase four-wire (via TA without TV connection, TA six-wire system, about 196608 types); three-phase four-wire (direct access type, a total of 8 types). In this embodiment, the failover box can be a WT-CH24 failover box

Further, the transformer box 5 includes: a voltage transformer (as shown in Figure 3) and a current transformer (as shown in Figure 4); the transformer box is also used for simulating the voltage transformer, current transformer grounding and Not grounded. The failover box 4 and the transformer box 5 are selected by PC software program control. Various wiring modes can be set in various combinations through the fault setting interface of the PC software.

The metering error calculator 6 is used to calculate the metering error between the standard electric energy meter 2 and the electric energy metering high-frequency pulse outputted by the electricity stealing demonstration electric energy meter 3 . More specifically, the error between the standard watt-hour meter 2 measured by the metering error calculator 6 and the electricity-stealing demonstration watt-hour meter 3 includes the error of active power and the error of reactive power, and the standard watt-hour meter 2 and Stealing electricity demonstrates the error of the energy meter 3 for inductive loads and for capacitive loads. In practical applications, the metering error calculator 6 in this embodiment may use a WT-K3BM multi-channel metering error calculator.

Preferably, the voltage and current input terminals of the power-stealing demonstration watt-hour meter 3 are equipped with a phase volt-ampere detection module 7, and the phase volt-ampere detection module 7 carries out data collection and analysis to the table tail data of each table position respectively, and uploads to PC, PC analyzes the data, and in the demonstration interface, displays the voltage and current amplitude, component phase and power, power expression and vector diagram of the standard table and each test table, so as to realize the operation under the power stealing state. Comparison of parameters with graphs. At the same time, the phase volt-ampere detection module 7 is also used to detect the loop voltage and current in real time. When the voltage and current loops fail, the phase volt-ampere detection module uploads the loop alarm information and lowers the output of the corresponding fault indicator. The phase volt-ampere detection module 7 in this embodiment may use a WT-XFDB phase volt-ampere detection module.

Further, the metering error analysis device provided by the embodiment of the present invention also includes: a display module 8, which is used to display the comparison of each operating parameter and the chart in the stealing state on the demonstration interface, including the error calculated by the metering error calculator, And the meter tail voltage, current amplitude, phase and power of the standard electric energy meter and the electricity stealing demonstration electric energy meter. More specifically, the display module 8 displays the error demonstration interface on the computer through the device control software, and can also switch to the large screen at the same time. In addition, the errors demonstrated by the display module 8 can also demonstrate reactive errors in addition to active errors. When the display module 8 demonstrates the error, the phase can be quickly switched between 0.5L (inductive load, power factor 0.5) and 0.5C (capacitive load, power factor 0.5) test points through the control software, so as to realize Quick comparison of measurement results under various loads.

Furthermore, the measurement error analysis device provided in this embodiment has auxiliary functions for demonstration, including: terminal control and control status indication functions, and meter box door opening detection functions.

1. The function of negative control terminal control and control status indication. The device is equipped with a detection controller WT-CH98, which is used to realize the control demonstration function of the negative control terminal. The realization method is: during the demonstration, the PC control software sends a rotation command to the terminal, and when a round trip command is issued, a round The trip indicator light of the switch is on, and the closing indicator light is off at the same time, and the output of the No. 1 gauge is dropped. The implementation method of the second round is the same as that of the first round, and it is used to demonstrate the function of load control management. The PC control software records the event function and the event occurrence time and stores it in the database.

2. The door opening detection function of the meter box. The device uses the two doors on the front panel of the platform to simulate the meter box door, and demonstrates the detection and alarm recording functions after the meter box door is opened. The device installs a micro switch and a proximity detection switch on the two doors to realize two Two different detection methods, the detection controller WT-CH98 equipped with the device detects the status of the two door switches, when there is a door opening behavior, WT-CH98 uploads the information to the PC control software in time, and the PC prompts to open the door in the form of a pattern on the demonstration interface Alarm information, and record the time when the door is opened.

Those skilled in the art can understand that the voltage and current applied to the tail of the meter by the metering error analysis device provided by the embodiment of the present invention are dummy load voltage and current, with adjustable amplitude, phase and frequency, and analog electric energy metering circuit. Current transformer (TA) wiring can realize the setting of wiring functions such as incomplete star connection, phase line short connection of complete star connection, common line disconnection, and two-phase TA secondary circuit series connection; for voltage transformers (TV) wiring, which can realize primary phase failure, secondary phase failure, primary polarity reverse connection, The setting of secondary polarity reverse connection and different voltage and equal wiring functions; the measurement error analysis device provided by the embodiment of the present invention can simulate the actual wiring on the spot of stealing electricity, or change the electricity stealing mode of the internal components of the electric energy meter, and automatically measure the error The data has the function of measuring the electricity stealing ability of electric stealing appliances. Through the analysis of the power data of the electric stealing appliances, the influence of the electric stealing appliances on the measurement error can be determined, so as to judge its electricity stealing ability.

Correspondingly, the present invention also provides a measurement error analysis method, which can be implemented by the aforementioned measurement error analysis device.

Referring to FIG. 5, it is a schematic flow chart of the first embodiment of the measurement error analysis method provided by the present invention. As shown in FIG. 5, the measurement error analysis method includes:

Step S101 , applying virtual load voltage and current to the standard electric energy meter and the electricity stealing demonstration electric energy meter.

Step S102, setting the wrong wiring mode of the meter tail of the electricity stealing demonstration electric energy meter, and simulating various wirings on the simulation site.

Step S103, inputting the electric energy measurement high-frequency pulse of the electricity stealing demonstration electric energy meter to the pulse input port of the measurement error calculator.

Step S104, input the standard electric energy measurement high-frequency pulse into the standard pulse input port of the measurement error calculator. Steps S104 and S103 can be executed simultaneously.

Step S105, calculating the measurement error between the standard electric energy meter and the electric energy measurement high-frequency pulse outputted by the electricity stealing demonstration electric energy meter.

The measurement error analysis method provided by the present invention can not only test and analyze the measurement error of the electric energy meter, but also be used for the training of electricity inspectors, so that the trainers can understand the degree of influence of various means of stealing electricity on the accuracy of measurement in a relatively short period of time , improve its anti-stealing ability; it can also play a certain auxiliary role in the determination of supplementary electricity, and improve the efficiency and results of anti-stealing work.

Referring to FIG. 6 , it is a schematic flowchart of the second embodiment of the measurement error analysis method provided by the present invention. In this embodiment, the flow steps of the measurement error analysis method will be described in more detail. As shown in Figure 6, the measurement error analysis method includes:

Step S201 , applying virtual load voltage and current to the standard electric energy meter and the electricity stealing demonstration electric energy meter. The dummy load voltage and current are output by the dummy load electronic source in a voltage range of 0.0V to 380.0V, an output current range of 0.0A to 5.0A, an output frequency range of 45.0Hz to 65.0Hz, and a phase of 0.00° to 359.99°. The voltage and current applied to the tail of the meter by the virtual load electronic source are the virtual load voltage and current, the amplitude, phase and frequency are adjustable, and meet the requirements of technical indicators. More specifically, the virtual load electron source in this embodiment can be used in actual use WT-FY50 program-controlled electron source, and its technical indicators are: operating environment: temperature: -10°C ~ +40°C; humidity: ≤85 Altitude: below 4000m; input power: single-phase 220V±10%, 50Hz±0.2Hz; output voltage range: 57.7V, 100V, 220V, 380V; output current range: 0.5A, 1A, 1.5A, 2.5A , 5A; output frequency range: 45~65Hz, adjustment fineness: <0.01Hz; phase: 0~359.9°; adjustment fineness 0.1°; phase adjustment accuracy: 0.5°.

Step S202, setting the wrong wiring mode of the meter tail of the electricity stealing demonstration electric energy meter, and simulating various wirings on the simulation site. More specifically, in this embodiment, the faulty switching box and the transformer box are used to set the wrong connection mode of the meter tail of the power-stealing demonstration electric energy meter. The wiring fault switching box can set the wrong wiring mode of the end of each meter separately, and can simulate various wiring on the scene, including three-phase three-wire high-voltage meters, three-phase four-wire high-voltage and low-voltage electric energy meters, voltage transformer TV Secondary wiring, current transformer TA secondary wiring, etc., including: three-phase three-wire (via TV, TA wiring, TA simplified wiring, about 129024 types); three-phase three-wire (via TV, TA wiring, TA four-wire system, About 516,096 kinds); three-phase four-wire (via TV, TA connection, TA simplified wiring, about 235,929 kinds); three-phase four-wire (via TV, TA connection, TA six-wire system, about 235,929 kinds); three Phase four-wire (via TA without TV connection, TA six-wire system, about 196608 types); three-phase four-wire (direct access type, a total of 8 types). In this embodiment, the failover box may be a WT-CH24 failover box. Further, the transformer box includes: a voltage transformer (as shown in Figure 3) and a current transformer (as shown in Figure 4); the transformer box is also used to simulate the grounding of the voltage transformer and current transformer grounded. The failover box 4 and the transformer box are selected by PC software program control. Various wiring modes can be set in various combinations through the fault setting interface of the PC software.

Step S203, inputting the electric energy measurement high-frequency pulse of the electricity stealing demonstration electric energy meter to the pulse input port of the measurement error calculator. More specifically, when demonstrating the measurement error, the power-stealing demonstration electric energy meter inputs its own electric energy measurement high-frequency pulse to the pulse input port of the measurement error calculator. Further, in the embodiment of the present invention, two or more power-stealing demonstration electric energy meters 3 may be included. During the electricity stealing demonstration, the pulse output ports of multiple electricity stealing demonstration energy meters are connected to the metering error calculator to perform error verification of multiple energy meters, and multiple meter positions can simultaneously and independently verify errors.

Step S204, input the standard electric energy measurement high-frequency pulse into the standard pulse input port of the measurement error calculator. Steps S204 and S203 can be executed simultaneously. More specifically, when demonstrating measurement errors, the standard electric energy meter inputs standard electric energy measurement high-frequency pulses to the standard pulse input port of the measurement error calculator 6 . More specifically, in the embodiment of the present invention, the standard electric energy meter 2 may be a high-precision three-phase standard electric energy meter WT-B3E5, and its error accuracy is less than 0.1%.

Step S205, calculating the measurement error between the standard electric energy meter and the electric energy measurement high-frequency pulse outputted by the electricity stealing demonstration electric energy meter. More specifically, the measurement error calculator measures the error between the quasi-electric energy meter 2 stealing demonstration electric energy meter 3, the error includes the error of active power and the error of reactive power, and the standard electric energy meter and electric stealing demonstration The error of the energy meter for the inductive load and the error for the capacitive load. In practical applications, the metering error calculator in this embodiment can use the WT-K3BM multi-channel metering error calculator.

Step S206, displaying the comparison of various operating parameters and charts in the power stealing state on the demonstration interface, including the error calculated by the measurement error calculator, and the meter tail voltage, current amplitude, phase and power. More specifically, the demonstration interface displays the comparison of various operating parameters in the power-stealing state with the chart, including the error calculated by the measurement error calculator, as well as the meter tail voltage and current amplitude of the standard electric energy meter and the electricity-stealing demonstration electric energy meter , phase and power. The error demonstration interface of the device control software is displayed on the computer, and can also be switched to the large screen at the same time. When demonstrating the error, the phase can be quickly switched between the 0.5L (inductive load, power factor of 0.5) and 0.5C (capacitive load, power factor of 0.5) test points through the control software, so as to realize the two loads Quick comparison of measurement results.

In step S207, the loop voltage and current are detected in real time. When the voltage and current loops fail, the phase volt-ampere detection module uploads the loop alarm information and lowers the output corresponding to the fault indicator. More specifically, a phase volt-ampere detection module is installed on the voltage and current input terminals of the power-stealing demonstration electric energy meter, and the phase volt-ampere detection module performs data collection and analysis on the meter tail data of each meter position respectively, and uploads to the PC Computer and PC analyze the data. On the demonstration interface, the voltage and current amplitude, component phase and power, power expression and vector diagram of the standard table and each test table are displayed, so as to realize the operating parameters in the stealing state. Comparison with chart. At the same time, the phase volt-ampere detection module is also used to detect the loop voltage and current in real time. When the voltage and current loop fails, the phase volt-ampere detection module uploads the loop alarm information and lowers the output of the corresponding fault indicator. The phase volt-ampere detection module in this embodiment may use a WT-XFDB phase volt-ampere detection module. Those skilled in the art can understand that there is no specific chronological relationship between step S207 and the previous steps S201-206, and step S207 can be executed in real time throughout the whole process of the measurement error analysis method embodiment provided by the present invention.

Those skilled in the art can understand that the metering error analysis method provided by the embodiment of the present invention is applied to the tail voltage and current of the meter as the dummy load voltage and current, the amplitude, phase and frequency are adjustable, and the analog electric energy metering circuit is used for Current transformer (TA) wiring can realize the setting of wiring functions such as incomplete star connection, phase line short connection of complete star connection, common line disconnection, and two-phase TA secondary circuit series connection; for voltage transformers (TV) wiring, which can realize primary phase failure, secondary phase failure, primary polarity reverse connection, The setting of secondary polarity reverse connection and different voltage and equal wiring functions; the measurement error analysis device provided by the embodiment of the present invention can simulate the actual wiring on the spot of stealing electricity, or change the electricity stealing mode of the internal components of the electric energy meter, and automatically measure the error The data has the function of measuring the electricity stealing ability of electric stealing appliances. Through the analysis of the power data of the electric stealing appliances, the influence of the electric stealing appliances on the measurement error can be determined, so as to judge its electricity stealing ability.

The measurement error analysis method and device provided by each embodiment of the present invention can analyze, record, store and upload the data of stealing electricity after calculating the measurement error of the standard electric energy meter and the electricity stealing demonstration electric energy meter. Specifically include:

1. Error analysis of electricity stealing points inside the meter: 1. When the device is restoring or demonstrating electricity stealing on the spot, it first reads the data at the end of the meter before the act of stealing electricity and the energy sampling data of the electric energy meter (including: voltage, current, etc.) , power and phase), after calculating the error, save the data, and then read the end-of-meter data and the energy sampling data (including: voltage, current, power and phase) of the electric energy meter after the stealing behavior is applied, and calculate the error. 2. Read the energy sampling data (including: voltage, current, power and phase) of the electric energy meter after the act of stealing electricity, compare it with the standard meter, and calculate its error.

2. Error analysis of the external wiring of the stealing point: 1. When the device is restoring or demonstrating on-site stealing, it first reads the data at the end of the meter before the act of stealing electricity and the energy sampling data of the electric energy meter (including: voltage, current, etc.) , power and phase), after calculating the error, save the data, and then read the end-of-meter data and the energy sampling data (including: voltage, current, power and phase) of the energy meter after the stealing behavior is applied, and calculate the error. 2. Read the energy sampling data (including: voltage, current, power and phase) of the electric energy meter after the act of stealing electricity, compare it with the standard meter, and calculate its error.

Finally, the accumulated electric energy of the 24-hour electric energy meter is calculated, and the undercounted electric energy is displayed after the act of stealing electricity is applied.

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) and the like.

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 metering error analysis device, characterized in that, comprising: Virtual load electronic source, used to apply virtual load voltage and current to the standard electric energy meter and electric stealing demonstration electric energy meter; The standard electric energy meter is connected with the measurement error calculator, and is used to input the standard electric energy measurement high-frequency pulse into the standard pulse input port of the measurement error calculator when demonstrating the measurement error; Electricity stealing demonstration electric energy meter is connected through the wiring fault switch box, transformer box and virtual load electronic source, and is used to input the high-frequency pulse of its own electric energy measurement to the pulse input port of the measurement error calculator when demonstrating the measurement error ; Fault switching box and transformer box are used to set the wrong wiring mode of the meter tail of the electricity stealing demonstration electric energy meter, and simulate various wiring on the scene, including but not limited to three-phase three-wire high voltage meter, three-phase four-wire high and low voltage Energy meter, voltage transformer secondary wiring, current transformer secondary wiring, and corresponding simplified wiring and complete wiring; The metering error calculator is used to calculate the metering error between the standard electric energy meter and the electric energy metering high-frequency pulse output by the electricity stealing demonstration electric energy meter. 2. The metering error analysis device according to claim 1, wherein the transformer box comprises: a voltage transformer and a current transformer; the transformer box is also used for simulating the voltage transformer current transformer grounding and Not grounded. 3. The metering error analysis device according to claim 1, wherein the virtual load electronic source has an output voltage range of 0.0V to 380.0V, an output current range of 0.0A to 5.0A, and an output frequency range of 45.0Hz to 65.0 Hz, phase 0.00o to 359.99o. 4. metering error analysis device as claimed in claim 1, is characterized in that, the error between the standard watt-hour meter measured by the metering error calculator and the electricity-stealing demonstration watt-hour meter comprises the error of active power and the error of reactive power. Error, and the error of the standard electric energy meter and the electricity stealing demonstration electric energy meter for the inductive load and the error for the capacitive load. 5. measurement error analysis device as claimed in claim 1, is characterized in that, the voltage of described stealing electricity demonstration watt-hour meter, the phase volt-ampere detection module is installed on the current input end, is used for detecting circuit voltage and current in real time , when the voltage and current loop fails, the phase volt-ampere detection module uploads the loop alarm information, and lowers the output corresponding to the fault indicator. 6. The measurement error analysis device according to any one of claims 1 to 5, wherein the measurement error analysis device further comprises: The display module is used to display the comparison of various operating parameters and charts in the state of electricity stealing in the demonstration interface, including the error calculated by the measurement error calculator, as well as the meter tail voltage and current amplitude of the standard electric energy meter and the electricity stealing demonstration electric energy meter value, phase and power. 7. A measurement error analysis method, characterized in that, comprising: Apply virtual load voltage and current to the standard electric energy meter and the electricity stealing demonstration electric energy meter; Set up the wrong connection mode of the meter tail of the electricity stealing demonstration electric energy meter, and simulate various connections on the scene; Inputting the electric energy measurement high-frequency pulse of the electricity-stealing demonstration electric energy meter into the pulse inlet of the metering error calculator; inputting the standard electric energy metering high-frequency pulse into the standard pulse inlet of the metering error calculator; The measurement error between the standard electric energy meter and the electric energy metering high-frequency pulse output by the electricity stealing demonstration electric energy meter is calculated. 8. The measurement error analysis method as claimed in claim 7, characterized in that, the voltage range of the virtual load voltage and current is 0.0V to 380.0V, and the output current range is 0.0A to the standard electric energy meter and the electricity stealing demonstration electric energy meter to 5.0A, the output frequency range is 45.0Hz to 65.0Hz, and the phase is 0.00o to 359.99o. 9. measurement error analysis method as claimed in claim 7, is characterized in that, also comprises after the electric energy metering high-frequency pulse calculation of described standard electric energy meter and electricity stealing demonstration electric energy meter output between the two metering errors : In the demo interface, the comparison between various operating parameters and charts in the power stealing state is displayed, including the error calculated by the measurement error calculator, and the meter tail voltage, current amplitude, phase and power. 10. The measurement error analysis method according to any one of claims 7 to 9, characterized in that the measurement error analysis method further comprises: detecting the loop voltage and current in real time, and when the voltage and current loop fails , the phase volt-ampere detection module uploads the loop alarm information, and lowers the output corresponding to the fault table.