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Byeon, Woo-Yeol;Nho, Eui-Cheol;Kim, In-Dong;Choi, Nam-Sup;Joung, Gyu-Bum
- Journal of the Korea Institute of Information and Communication Engineering
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- v.9 no.1
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- pp.146-151
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- 2005
This paper describes a new voltage disturbance generator for the performance test of a 1-phase UPS(Uninterruptible Power Supply). The proposed scheme has the ability of voltage sag, swell, and outage generation. The structure of the proposed generator is simple and cost-effective. The voltage disturbance can be generated with easy control system. The circuit operation and characteristics of the proposed converter are described and the usefulness of the converter is verified through computer simulations and experimental results.
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Lee, Hyung-Kyu;Kim, Gi-Taek
- Journal of IKEEE
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- v.23 no.2
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- pp.580-585
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- 2019
Batteries are being used in ESS, electric vehicles and uninterruptible power backup systems. Lead-acid batteries are the most used batteries for high capacity power back up equipment due to their high reliability and low price advantages. It is very important to estimate the chargeable capacity(SoH), and many algorithms were proposed to estimate the internal resistance of the battery. In this paper, the Battery Monitoring System(BMS) for high capacity uninterruptible power supply for IDC is proposed. A simple algorithm for estimating internal resistance was proposed. An computational block diagram of the proposed signal processing algorithm and BMS system configuration of CPU and analog circuit were shown. The proposed method was proved useful by presenting data examples of application to actual IDC sites.
https://doi.org/10.7471/ikeee.2019.23.2.580 인용 PDF KSCI HTML