Decentralized control for redundant parallelism of uninterruptible power supplies with different ratings using only current sensors

被引：2

作者：

Sato, EK ^{[1
]}

Kawamura, A ^{[1
]}

机构：

[1] Yokohama Natl Univ, Dept Elect & Comp Engn, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan

来源：

2005 IEEE 36TH POWER ELECTRONIC SPECIALISTS CONFERENCE (PESC), VOLS 1-3 | 2005年

关键词：

INVERTERS; OPERATION; UPS;

D O I：

10.1109/PESC.2005.1582033

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Authors propose a decentralized control for redundant parallel connection of multiple uninterruptible power supplies (UPS) using only current sensors. With the measurement of the output current, and following calculation of its active and reactive components, the proposed control provides suitable values of output voltage variables (phase angle and amplitude) to supply a common load without communications cabling. This paper presents design considerations of the control equations, including the development of a voltage drop compensator to attenuate the flow of reactive lateral (or circulating) current. An experimental setup with three voltage sources connected in parallel with different output power ratings verifies the feasibility and good performance of this independent control in terms of stability and load sharing. In addition, this locally-controlled parallel-connected UPS system shows promising capability to feed nonlinear loads.

引用

页码：2823 / 2829

页数：7

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