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Three-phase three-wire electric energy metering device online detection device and method

A metering device and high-voltage electric energy technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of being unable to grasp the user's real-time power consumption in real time and low efficiency of inspection work, and achieve simple installation, small workload, The effect of safeguarding economic interests

Inactive Publication Date: 2018-02-02
YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low inspection work efficiency in the prior art and the inability to grasp the real-time electricity consumption of users in real time, and to provide a detection method for online detection of wiring correctness of a three-phase three-wire high-voltage electric energy metering device and This method does not require power failure during detection, and can display the actual wiring mode and phasor diagram on site, and can remotely realize real-time data recall and measurement, and quickly and accurately judge the correctness of the wiring of the on-site metering device

Method used

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  • Three-phase three-wire electric energy metering device online detection device and method
  • Three-phase three-wire electric energy metering device online detection device and method
  • Three-phase three-wire electric energy metering device online detection device and method

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Embodiment 1

[0036] In the online detection method provided by the present invention, refer to the attached figure 1 , This embodiment includes the following steps:

[0037] 1. Measuring basic data

[0038] For related basic data, such as U 12 , U 32 , U 13 , I 1 , I 3、 U 32 With U 12 Angle between Φ, U 12 With I 1 Angle between Φ 1 , U 32 With I 3 Angle between Φ 3 measuring.

[0039] 2. Data analysis and judgment

[0040] The basic data of the above measurement is processed and analyzed to determine whether the data is within the normal operating range. First judge whether the voltage and current values ​​are within the normal range, namely:

[0041] U 12、 U 32、 U 13 Whether it is the normal value of 100V, if it is about 173V, there will be a voltage polarity reverse fault, if the value is too small, there will be a basic voltage wiring error, such as an open circuit, etc.;

[0042] I 1、 I 3 Whether it is normal and similar in value, if it is 0 or the difference is too large, there is a basic curr...

Embodiment 2

[0052] In the online detection device of the three-phase three-wire high-voltage electric energy metering device provided by the present invention, refer to the attached Figure 2-5 , The device includes: voltage sampler, current sampler, phase comparator, data processing module, central processing unit, communication module, display module, voltage sampler and current sampler to transmit data to the data processing module and phase comparator, The data processing module is connected with the central processing unit, and the central processing unit is respectively connected with the communication module and the display module.

[0053] Among them, the voltage sampler and the current sampler collect the output voltage and current data in real time, and the phase comparator compares the data collected and transmitted by the voltage sampler and the current sampler, and measures the phase angle between different phasors to obtain the phase Measurement data.

[0054] The data processin...

Embodiment 3

[0060] Such as Image 6 As shown in the correct installation wiring diagram of the online detection device of the metering device, the voltage terminal wiring phase is UVW, the phase sequence is positive, and the input current of the first element of the electric energy meter is I u , The input current of the second element is I w , The correct wiring phasor diagram such as Figure 8 .

[0061] Take the wrong installation and wiring of the metering device online detection device as an example, refer to Figure 7 Using the detection method described in Example 1, it was found that in the detection device, the basic data line voltage and phase current measured by the voltage and current samplers were within the normal operating range.

[0062] According to the output data U of the phase comparator 32 U 12 The phase angle Φ≈300°, the phase sequence under this connection is judged to be the reverse phase sequence. In the case of reverse phase sequence, such as Picture 9 As shown, the r...

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Abstract

The invention provides a three-phase three-wire electric energy metering device online detection device and method. The device is simple to install and easy to debug. The wiring situation on a displayscreen can be locally viewed, and remote real-time called measurement can be realized. The detection is quick and convenient, the workload is light, and the work efficiency is greatly improved. Powerabnormality or wiring error can be actively reported to a master station once found, so that power failure can be handled in time, and the economic benefits of users and enterprises are guaranteed. As detection can be carried out without power outage, normal power consumption of users is ensured, the personal safety of the staff is ensured, and high safety performance is achieved.

Description

Technical field [0001] The invention belongs to the technical field of electric energy measurement, and in particular relates to an online detection method and device for wiring correctness of a three-phase three-wire high-voltage electric energy metering device. Background technique [0002] At present, various wiring errors often occur due to negligence and other reasons during field work such as on-site installation, disassembly, replacement and debugging by electric energy metering staff, or electric energy users use artificial means to change the wiring of electric energy meters and transformers to achieve theft or breach of contract. For other purposes, the above conditions lead to incorrect wiring of the electric energy metering device and incorrect metering of the user's electric energy meter. Among them, high-voltage users have a high risk of recovering electricity bills due to large power consumption. The accuracy of the wiring of their high-voltage three-phase three-w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 宋滕飞李岩廖烽然尹青青宋春辉田书然张森林周铭遥周志娟王俊贾乐刚
Owner YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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