Implementation of Uninterruptible Power Supplies Integrated with Harmonics Compensation Capability

• Main Authors: Tsong-Shing Lee, 李宗勳
• Other Authors: Shyh-Jier Huang
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/25955174702895660387

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 92 === 　　In this thesis, uninterruptible power supplies integrated with harmonics compensation capability is proposed. The system is constructed based on the interactive structure, where the harmonic filtering and the improvement of utility power factor are also included in anticipation of increasing the quality of supplying power. With the employment of such a proposed system, the single-stage power converter can be adaptively operated at harmonic compensation mode or stabilization mode, by which the power can be reliably provided for the connected loads without interruption. In the operation of the proposed system, the battery module can be charged by the bi-directional DC-to-DC converter so that once the main power failure occurred, the battery module will release the power for the stabilization of the power converter. Moreover, with the proposed circuit design, only one current feedback signal is required; hence, the control circuit design can be simplified. This proposed approach has been tested through the theoretical analysis and experimental validation. Test results help support the feasibility and practical values of the method.