Calibration of Energy Meter using PID microcontroller

Abstract

The Calibration can be defined as the process of testing any meter or instrument to give a result in sufficient range. The primary significance of calibration is that it maintains accuracy, standardization and repeatability by eliminating or minimizing factors that cause inaccurate measurement. Now days many electromechanical, electrical and electronic power and energy meter at different frequencies are available. This can be used in power distribution systems as well as in industry in day to day life. Now the process of calibration of energy meter is considered as metrological system concern which means that the system connected with measurement and with the scientific study of measurement.

This project is designed with a Proportional Integral Derivative (PID) controller, LCD display, Voltage regulation, LDR sensor and a Metering unit. To improve the performance without increasing its cost PID controller is used. Because of this the stability of system is maintained and increases the accuracy of the system. The traditional calibration methods for analog energy meter are not applicable to digital meters in past hence, to reduce this problem in this paper a calibration method for both analog and digital energy meter is discussed. This calibration can be suitable for onsite as well as offsite. This calibration method also has some advantages as compared to other existing systems this also described in the next sections