Integral Terminal Sliding Mode Control for Grid-Tied Photovoltaic Systems

• Main Authors: Tse-Wei Chiu, 邱則維
• Other Authors: Chian-Song Chiu
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/27649952840962989632

碩士 === 中原大學 === 電機工程研究所 === 101 === The purpose of thesis is to design a grid-tied photovoltaic (PV) power generation system with maximum power point tracking (MPPT) performance. First, power electronic converters transfer the PV power to the utility gird. In order to achieve high efficiency and decrease inverter current total harmonic distortion, we design an integral terminal sliding mode controller (ITSMC) for the current tracking of the PV inverter. Its advantages are finite time convergence, no steady-state error, and reduced chattering phenomenon compared with traditional sliding mode control. Moreover, robustness against parameter uncertainties and disturbances are also enhanced in the controller design. Then, by combining the fuzzy logic MPPT algorithm, the inverter current is kept at maximum power operational point. Finally, from simulation and experiment results, the ITSMC effectively drives the PV array system to the maximum power point and reduces inverter current total harmonic distortion.