Design and Implementation of Single-Phase Digital Controlled Active Power Filter

• Main Authors: Chih-Shun Lee, 李智順
• Other Authors: Chih-Chiang Hua
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/54244277798809255322

碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 91 === The power electronic equipments are used widely in industry. These nonlinear loads generate a lot of current harmonics that make the quality of the power system worse. In order to eliminate these harmonics, most literatures employ the active power filter to solve the above problems. However, these control strategies are more complicated and need two current sensors or more, increasing the system cost. The purpose of this thesis is to design a single-phase digital active power filter, which adopts the structure of shunt active power filter and utilizes the concept of energy balance, to simplify the control method. Only one current sensor and two voltage sensors are required to detect the mains current, the dc bus voltage and the mains voltage. The digital signal processor (TMS320F240) is used to implement the simple control method. The proposed method features both harmonic elimination and power correction. Finally, the feasibility of the proposed control is verified from the PSPICE simulation and experimental results.