CN104020437A - Electric energy meter correction method - Google Patents

Abstract

The invention discloses an electric energy meter correction method. In the whole meter correction process, manual participation is not needed, and a meter correction person only needs to take out or hang an electric energy meter needing to be corrected on a table body after a computer and the electric energy meter detection table body are arranged well. In this way, workloads of the meter correction person are reduced, time is saved in the meter correction process, and the meter correction efficiency is very high.

Description

Electric energy meter calibrating method

Technical field

The present invention relates to electric energy meter technical field, is specifically a kind of electric energy meter calibrating method.

Background technology

The electric energy meter calibrating method of prior art is as follows: first the electric energy meter of need calibration is hung over to electric energy meter and detect on stage body (hang on electric energy meter stage body and can realize and need the circuit of calibration electric energy meter to connect), then by electric energy meter, detect a stage body current value of input and a magnitude of voltage, electric energy meter detects stage body and calculates and draw yield value according to the value on need calibration electric energy meter and standard scale, then manually yield value is inputted to computing machine, and by computing machine, yield value is write in the power gain register that needs calibration electric energy meter.Above-mentioned correction method has the following disadvantages: because needs manually participate in calibration, brought more workload therefore not only to calibration personnel, and also also more time-consuming in this operating process, make calibration efficiency lower.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of and participate in and the high electric energy meter calibrating method of calibration efficiency without artificial.

Technical scheme of the present invention is, a kind of electric energy meter calibrating method is provided, and comprises the following steps:

(1) computing machine that, built-in CRT software is set and electric energy meter detect stage body and communicate and be connected;

(2), the electric energy meter of need calibration being articulated in to electric energy meter detects on stage body;

(3), to electric energy meter, detect stage body energising, input a rated voltage and a rated current, power-factor cos Φ=0.5L;

(4), by computer acquisition electric energy meter, detect active-power P 1, the reactive power Q 1 of stage body internal standard table and generate a script;

(5), computing machine is by the above-mentioned script of CRT running software, the data in this script flowed to the electric energy meter that needs calibration;

(6), need the electric energy meter of calibration to obtain active-power P 1, reactive power Q 1, by need, calibrate active-power P 2, the reactive power Q 2 that electric energy meter self collects, and bring these values into error amount err computing formula:

$\mathrm{err}=\frac{P1*Q2-P2*Q1}{P1*P2+Q1*Q2},$

Calculate error amount err, and bring this error amount err into power gain value Pgain=P1/ (P2+Q2*err) ^-1, calculate power gain value Pgain and this power gain value Pgain write in the power gain register that needs calibration electric energy meter.

Adopt after above method, the present invention compared with prior art, has the following advantages:

Electric energy meter calibrating method of the present invention without artificial participation, sets and only computing machine, electric energy meter need to be detected to stage body in whole calibration process, and calibration personnel only need to take out or hang up the electric energy meter that needs calibration on stage body.Therefore not only reduce calibration personnel's workload, and also relatively saved time in this calibration operating process, made calibration efficiency higher.

Embodiment

Below in conjunction with specific embodiment, the invention will be further described.

Calibration is the important step of the correct little error electric weight of each measuring terminal output.And electric energy meter calibrating method employing of the present invention is calibration of power method, calibration of power ratio juris is according to standard scale and needs the power error between calibration electric energy meter power samples value, calculate correct effectively power gain value, in Writing power gain register, proofread and correct and need the power samples value of calibration electric energy meter and the actual deviation of external power, thereby reach the object of calibrating power.

A kind of electric energy meter calibrating method of the present invention, comprises the following steps:

(1), computing machine and electric energy meter that built-in CRT software is set detect stage body and communicate and be connected, computing machine is equipped with CRT software, computing machine communicates by serial ports and electric energy meter detection stage body; Computing machine communicates with needing the electric energy meter of calibration by RS232, and computing machine is connected with needing the electrical energy meter electricity of calibration.

(2), the electric energy meter of need calibrations be articulated in to electric energy meter detect on stage body, hang over like this on electric energy meter stage body and can realize and need the circuit of calibration electric energy meter to connect, comprise telecommunication circuit and feed circuit etc.

(3), to electric energy meter, detect stage body energising, input a rated voltage and a rated current, power-factor cos Φ=0.5L, provides a standard signal value;

(4), by computer acquisition electric energy meter, detect active-power P 1, the reactive power Q 1 of stage body internal standard table and generate a script, be about to active-power P 1, reactive power Q 1 writes in this script;

(5), computing machine is by the above-mentioned script of CRT running software, the data in this script flowed to the electric energy meter that needs calibration;

(6), need the electric energy meter of calibration to obtain active-power P 1, reactive power Q 1, by need, calibrate active-power P 2, the reactive power Q 2 that electric energy meter self collects, and bring these values into error amount err computing formula:

$\mathrm{err}=\frac{P1*Q2-P2*Q1}{P1*P2+Q1*Q2},$

Calculate error amount err, and bring this error amount err into power gain value Pgain=P1/ (P2+Q2*err) ^-1, calculate power gain value Pgain, and this power gain value Pgain write in the power gain register that needs calibration electric energy meter.

Below only with regard to most preferred embodiment of the present invention, be described, but can not be interpreted as it is limitations on claims.The present invention is not limited only to above embodiment, and its concrete grammar allows to change.In every case the various variations of doing in the protection domain of independent claims of the present invention are all in protection scope of the present invention.

Claims (1)

1. an electric energy meter calibrating method, is characterized in that: comprise the following steps:

(1) computing machine that, built-in CRT software is set and electric energy meter detect stage body and communicate and be connected;

(2), the electric energy meter of need calibration being articulated in to electric energy meter detects on stage body;

(3), to electric energy meter, detect stage body energising, input a rated voltage and a rated current, power-factor cos Φ=0.5L;

(4), by computer acquisition electric energy meter, detect active-power P 1, the reactive power Q 1 of stage body internal standard table and generate a script;

(5), computing machine is by the above-mentioned script of CRT running software, the data in this script flowed to the electric energy meter that needs calibration;

(6), need the electric energy meter of calibration to obtain active-power P 1, reactive power Q 1, by need, calibrate active-power P 2, the reactive power Q 2 that electric energy meter self collects, and bring these values into error amount err computing formula:

$\mathrm{err}=\frac{P1*Q2-P2*Q1}{P1*P2+Q1*Q2},$

Calculate error amount err, and bring this error amount err into power gain value Pgain=P1/ (P2+Q2*err) ^-1, calculate power gain value Pgain and this power gain value Pgain write in the power gain register that needs calibration electric energy meter.