A microcontroller-based system for monitoring and controlling the operation of an uninterruptible power supply

Author

Malamos, Athanasios G. ; Kalaitzakis, Kostas ; Voulgaris, Nicholas C.

Author_Institution

Tech. Univ. of Crete, Chania, Greece

Volume

2

fYear

34881

Firstpage

610

Abstract

The design of a real-time system that measures and monitors the fundamental parameters of an uninterruptible power supply (UPS) in which it is incorporated is described. The system is based on a microcontroller (MCS-96 family) with a built-in 10-bit A/D converter. The parameters being measured in real-time are the amplitude, the frequency and the distortion of the UPS output AC signal. The charging state of the battery cells, the supply current of the battery and the signal level at specific test points on the UPS circuit board are also measured and monitored. These parameters are used in the real-time calculation of the remaining time before the UPS battery is exhausted and, in case of malfunction, the fault is located and the UPS is safely turned off

Keywords

analogue-digital conversion; computerised monitoring; harmonic distortion; microcontrollers; power engineering computing; power system harmonics; real-time systems; secondary cells; uninterruptible power supplies; voltage control; A/D converter; amplitude; charging state; frequency; microcontroller; output AC signal distortion; real-time monitoring/control system; secondary batteries; uninterruptible power supply; Battery charge measurement; Circuit testing; Control systems; Distortion measurement; Frequency measurement; Microcontrollers; Monitoring; Power measurement; Real time systems; Uninterruptible power systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, 1995. ISIE '95., Proceedings of the IEEE International Symposium on

Conference_Location

Athens

Print_ISBN

0-7803-7369-3

Type

conf

DOI

10.1109/ISIE.1995.497255

Filename

497255