Design and Implementation of MPPT Power Converter for Thermoelectric Generation System

• Main Authors: Hong-BinZhang, 張鴻彬
• Other Authors: Jia-You Lee
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/73053797933209166216

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 101 === This thesis proposes a maximum power point tracking (MPPT) method for the thermoelectric generator modules (TEMs). The MPPT methods from PV systems are generally applied to the MPPT converter for TEMs, but the characteristic curves of TEM and solar cell are not totally the same. The proposed MPPT converter is based on the physical property of TEM. The equivalent circuit model of TEM can be used by the impedance matching theory to realize MPPT control. The relation of TEMs interconnection with temperature gradient has been studied and analyzed, so that we could propose the most appropriate MPPT converter system structure. The proposed MPPT converter is composed of a boost dc-dc converter, a microcontroller and peripheral circuit to implement the MPPT method of TEMs. The algorithm is to calculate the TEMs internal impedance, and adjust the duty ratio of the boost dc-dc converter, to make the input impedance equal to the TEM internal impedance. Compare to the PV MPPT methods, this method produces more accurate and effective prediction of the optimized point.