Electric energy meter clock calibration method
A clock calibration and electric energy meter technology, which is applied to electronic timers, clocks, and changing time indications, etc., can solve the problems of low calibration efficiency, complicated calibration process, and inability to meet the requirements of calibration work, and achieve high calibration efficiency and high calibration accuracy Effect
Active Publication Date: 2016-03-30
STATE GRID CORP OF CHINA +2
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Problems solved by technology
The current method of clock calibration obviously has the disadvantages of heavy workload, extremely low calibration efficiency, and extremely complicated calibration process.
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[0034] Such as figure 1 Shown, is the method flowchart of the present invention: this electric energy meter clock calibration method provided by the present invention comprises the following steps:
[0035] S1. The communication master station calls and measures the clock of the target electric energy meter to be corrected under the master station, obtains the difference between the clock value of the target electric energy meter and the GPS standard clock value, and obtains the clock deviation value of the target electric energy meter;
[0036] The clock deviation value of the target electric energy meter mainly comes from the deviation of the basic clock frequency (such as crystal oscillator) of the electric energy meter: if the clock fundamental frequency designed to be 32768Hz is actually measured as 32767Hz, the error is (32767-32768) / 32768×3600 ×24=-2.64 seconds / day;
[0037] S2. According to the clock deviation value of the target electric energy meter obtained in step...
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The invention provides an electric energy meter clock calibration method. The method comprises the following steps: measuring a clock of an object electric energy meter to obtain a clock deviation value between the object electric energy meter and a GPS standard clock value; classifying the object electric energy meter; a master station performing coarse calibration on the clock of the object electric energy meter to enable the clock deviation value to be within five minutes; and performing clock calibration on the object electric energy meter after the coarse calibration to eliminate a clock deviation. According to the invention, the clock deviation value is obtained through a comparison between the clock of the object electric energy meter and a GPS standard clock, according to the clock deviation value and a national power network standard, by use of a segmental correction method, the clock deviation value of the object electric energy meter is corrected to be within one minute, and then according to prior arts, the clock of the object electric energy meter is calibrated at a time. The clock of the object electric energy meter is calibrated through a segmental calibration method, the whole process is automatic, artificial intervention is unnecessary, the calibration precision is high, clocks of all electric energy meters under the master station can be simultaneously calibrated, and the calibration efficiency is quite high.
Description
technical field [0001] The invention belongs to the field of electrical automation, and in particular relates to a method for calibrating a clock of an electric energy meter. Background technique [0002] With the development of national economy and technology and the great improvement of people's living standards, electric energy has become one of the indispensable energy sources for people's daily life, factories, enterprises and other units. Due to the improvement of people's living standards and the development of the national economy, people gradually began to pursue a more comfortable daily life and office experience, and the production of factories, enterprises and other units gradually increased. These factors have led to a huge increase in electricity consumption in our country. rising. [0003] Although our country is developing clean energy such as nuclear power, hydropower and wind power while developing thermal power construction, the speed of power plant const...
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IPC IPC(8): G04G5/00
CPCG04G5/00
Inventor 黄建硕陈石东李福东谢伟峰黄浩波周卫星翁薇刘莎
Owner STATE GRID CORP OF CHINA