On-line calibration method of electronic watt-hour meter

Abstract

The invention provides an on-line calibration method of an electronic watt-hour meter. The on-line calibration method of the electronic watt-hour meter includes the steps that a standard meter and a calibrated electronic watt-hour meter are connected to the same data collecting source; the standard meter and the calibrated electronic watt-hour meter collect data at the same time in preset time with a pulse collecting manner so as to obtain forward active electric energy data, forward reactive electric energy data, reverse active electric energy data and reverse reactive electric energy data; relative errors are calculated; whether a calibrated ammeter is qualified or not is judged according to the relative errors of the forward active electric energy data, the forward reactive electric energy data, the reverse active electric energy data and the reverse reactive electric energy data. The on-line calibration method of the electronic watt-hour meter solves the on-line calibration problem of the electronic watt-hour meter with negative work on a variable load system and overcomes the defect that verification of power of only one item is performed indoors under the condition that a well is suspended and the electronic watt-hour meter is detached, while power of the four items cannot be verified at the same time, and the oil production time efficiency is improved.

Description

technical field [0001] The invention relates to the calibration of electric energy meters, in particular to an online calibration method for electronic electric energy meters. Background technique [0002] With the continuous development of "digital oilfields", automatic metering instruments such as oilfield pressure and electricity are installed and used more and more widely. However, electronic energy meters for continuous production oil wells cannot achieve periodic verification. Since the forward and reverse active power and forward and reverse reactive power of the pumping unit are generated simultaneously during the up and down strokes, it belongs to the variable load system. According to the traditional laboratory instrument verification method, periodic verification cannot be carried out. On-site disassembly and assembly need to stop the well, which directly affects Crude oil production makes it difficult to grasp the accuracy of the electrical parameter measurement ...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of "digital oilfields", automatic metering instruments such as oilfield pressure and electricity are installed and used more and more widely. However, electronic energy meters for continuous production oil production wells cannot achieve periodic verification.

Since the forward and reverse active power and forward and reverse reactive power of the pumping unit are generated at the same time during the up and down strokes, it belongs to the variable load system. According to the traditional laboratory instrument verification method, periodic verification cannot be carried out. On-site disassembly and assembly need to stop the well, which directly affects Crude oil production, resulting in the accuracy of the measurement data of the electrical parameters of the oil wells cannot be grasped, and the measurement accuracy of the electric energy meters of some oil wells has the phenomenon of precision drift

Oil wells operate continuously, and shutting down and dismantling requires approval step by step. Well shutting down will affect production and production measurement

If the well is disassembled and assembled continuously, it is an illegal operation, which may easily lead to safety accidents

There are the following problems in the commonly used electric energy meter verification device and method at present: 1. Only one of the forward active power, forward reactive power, reverse active power and reverse reactive power of the electric energy meter can be verified under the specified load; 2. .For the electric energy meter that simultaneously measures the four items of power in the power consumption system, forward active power, forward reactive power, reverse active power and reverse reactive power, it cannot be verified; 3. For the power consumption system in the forward active power, forward reactive power, reverse The electric energy meter for measuring the four items of active power and reverse reactive power load at any time cannot be verified; Situations of change and simultaneous measurement

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