วิธีการระบุเอกลักษณ์ฮาร์มอนิกด้วยวิธีการแปลงสเปซเวกเตอร์ประกอบกับวิธีฟูริเยร์วินโดว์เลื่อน

Abstract

This article proposes a new harmonic identification method namely the space vector with sliding window Fourier analysis (SVF) method. To assess its performance, comparison studies have been made among the PQ, the SWFA, and the proposed SVF methods via MATLAB simulations of three-phase systems. Two cases of current-source nonlinear loads are considered, i.e. a balanced load of the three-phase rectifier type feeding a series-RL, and some unbalanced loads. The simulation results indicate that the SVF method yields the most accurate harmonic information, and %THDi average after compensation is bounded to the IEEE Std.519-1992. Moreover, the phase balancing is retained.