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Overall online verification method of high-voltage electric energy metering device

A technology of metering device and high-voltage electric energy, applied in the direction of measuring device, measuring electrical variables, instruments, etc., can solve the problems of increasing the burden of power supply reliability, affecting the normal power consumption of users, and poor data reliability, and achieving high reliability. Effect

Active Publication Date: 2021-11-09
山东计保电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two main defects of this verification method: 1. On-site operation is required during the verification, and the power must be cut off, which affects the normal power consumption of users; 2. The data source is limited to the on-site verification period, and the data reliability is not good
According to the current domestic power supply quality and reliability requirements, the average annual power outage time of users should not be 3.5 hours, but the power supply level in most parts of my country can only realize that the annual average power outage time of users does not exceed 9 hours, except for accidental power outages, high-voltage electric energy meters On-site verification increases the burden on power supply reliability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The overall online verification method for the high-voltage electric energy metering device described in this embodiment, the method includes:

[0031] The overall on-line verification method of the high-voltage electric energy metering device, the method includes:

[0032] S1: The wireless meter reading terminal sends the power consumption data of the high-voltage electric energy metering device to the metering master station, and the metering master station generates and stores the load curve according to the received power consumption data;

[0033] S2: Define N fixed verification periods and M load verification periods respectively according to the daily time period and load curve, where M and N are both positive integers greater than 1;

[0034] S3: The high-voltage electric energy metering device to be calibrated is connected in series with the current line of the standard meter, and the high-voltage electric energy metering device to be calibrated is connected in...

Embodiment 2

[0042] In this embodiment, on the basis of Embodiment 1, the number of load segments and fixed verification periods is changed, among which, five load segments are set, which are respectively high load segment, medium-high load segment, medium load segment, medium-low load segment and For the low load segment, the load verification period corresponding to the high load segment is 10 minutes before and after the time corresponding to the highest load value, and the load verification period corresponding to the medium and high load segment is 0.75*10 minutes before and after the time corresponding to the highest load value. Minutes, the load verification period corresponding to the medium load segment is 0.5 * 10 minutes before and after the time corresponding to the highest load value, and the load verification period corresponding to the medium and low load segment is 0.25 * 10 minutes before and after the time corresponding to the highest load value , the load verification per...

Embodiment 3

[0044] This embodiment adds new steps on the basis of embodiment 1, specifically:

[0045] S61: Compare the load of the checked high-voltage electric energy metering device in each time period obtained in step S4 with the load in each time period defined in step S2 when the checked high-voltage electric energy metering device was installed on the first day, one by one, if there are two If the compared loads are in the same load range, then further compare the measurement errors of the corresponding high-voltage electric energy metering devices under the two loads. If the difference between the two does not exceed the preset value, the high-voltage electric energy metering device to be calibrated is defaulted.

[0046] S62: Compare the load of the checked high-voltage electric energy metering device obtained in step S4 in each time period with the load of the checked high-voltage electric energy meter in each time period during previous calibrations one by one. If there are two ...

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PUM

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Abstract

The present invention relates to the technical field of online verification of high-voltage electric energy metering devices of 6-35kV and above; in particular, it relates to an overall online verification method for high-voltage electric energy metering devices, comprising: S1: the metering master station receives the metering data of the high-voltage electric energy metering device to be calibrated and Generate the load curve; S2: Define the fixed calibration period and the load calibration period according to the daily time period and load curve; S3: On the high-voltage side, connect a standard meter to the high-voltage electric energy meter, and the metering master station receives the high-voltage electric energy to be calibrated The electricity consumption data of the metering device and the standard meter during each fixed verification period and load verification period; S4: The metering master station calculates the metering increment of the standard meter and the high-voltage electric energy metering device under calibration in each period according to the received data; S5: Calculate the difference between the metering increment of the standard meter and the metering increment of the high-voltage electric energy metering device being calibrated within each time period. The invention can realize the multi-period calibration of the high-voltage transformer without power failure, has high reliability and can guarantee the normal power consumption of users.

Description

technical field [0001] The invention relates to the technical field of on-line verification of high-voltage electric energy metering devices of 6-35kV and above; in particular, it relates to an overall on-line verification method of high-voltage electric energy metering devices. Background technique [0002] The current traditional high-voltage electric energy metering device is composed of multiple electromagnetic voltage transformers + multiple electromagnetic current transformers + energy meters, etc., which is prone to ferromagnetic resonance, poor safety, high energy consumption, and cannot prevent electricity theft. Problems and defects such as large changes in error characteristics and difficult to determine. The high-voltage electric energy meter integrates the high-voltage voltage sensor, high-voltage current sensor, high-voltage source device, intelligent electric energy metering board, GPRS and other communication units, and intelligent metering software, and is d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 荣博荣潇李敏李海王伟
Owner 山东计保电气有限公司