An Implementation of Hybrid Active Filter for Current-type Harmonic Load

• Main Authors: Hung-Chieh Chu, 朱宏傑
• Other Authors: Yuan-Yih Hsu
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/03865828152791168554

碩士 === 國立臺灣大學 === 電機工程學研究所 === 91 === Due to the progress of power semiconductor technologies and power electronics technologies, applications of power converters have increased significantly in recent years, such as adjustable speed drives, switching power supplies. Most of these applications require diode rectifiers or thyristor rectifiers as the AC/DC front-ends. The nonlinear nature of the front-end rectifiers draw significant harmonic current from the utility grid, which result in harmonic distortion. This thesis is concerned with the design and implementation of three-phase hybrid active filter using solid-state switching devices. The proposed hybrid active filter is driven by a voltage-sourced inverter to eliminate current harmonics due to nonlinear load and improve the input power factor. A new digital signal processor（DSP）based control method for active power filter is presented. Compared to conventional analog and microprocessor based methods, the DSP based solution provides a flexible method to control the active filter. The PSCAD simulations and experiments using the DSP controller are performed to verify the effectiveness of hybrid active filter in reducing current harmonics and improving input power factor.