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http://dx.doi.org/10.5370/KIEEP.2012.61.1.041

A development of Diagnosis Monitoring System for UPS DC Link Capacitors using Zigbee Wireless Communication  

Kim, Dong-Jun (숭실대학교 대학원 전기공학과)
Shon, Jin-Geun (가천대학교 전기공학과)
Jeon, Hee-Jong (숭실대학교 전기공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers P / v.61, no.1, 2012 , pp. 41-46 More about this Journal
Abstract
Electrolytic power capacitors have been widely used in power conversion system such as inverter or UPS because of characteristics of large capacitance, high-voltage and low-cost. The electrolytic capacitor, which is most of the time affected by the aging effect, plays a very important role for the power-electronics system quality and reliability. Therefore it is important to diagnosis monitoring the condition of an electrolytic capacitor in real-time to predict the failure. In this paper, the on-line remote diagnosis monitoring system for UPS DC link electrolytic capacitors using low-cost single-chip zigbee communication modules is developed. To estimate the health status of the capacitor, the equivalent series resistor(ESR) of the component has to be determined. The capacitor ESR is estimated by using RMS computation using BPF modeling of DC link ripple voltage/current. Zigbee-based hardware experimental results show that the proposed remote capacitor diagnosis monitoring system can be applied to UPS successfully.
Keywords
DC link electrolytic capacitor; Equivalent Series Resistance(ESR); Remote diagnosis monitoring system; UPS(uninterruptible Power Supply); Zigbee-based hardware;
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