{'fraction_non_alphanumeric': 0.02367797947908445, 'fraction_numerical': 0.0007892659826361484, 'mean_word_length': 5.155339805825243, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Application of Boost Converter to Increase the Speed Range of Dual-Stator Winding Induction Generator in Wind Power Systems

In this paper, a topology using a dual-stator winding induction generator (DWIG) and a boost converter is proposed for the variable speed wind power application. At low rotor speeds, the generator saturation limits the voltage of the DWIG. Using a boost converter, higher dc voltage can be produced while the DWIG operates at maximum power point tracking even at low-speed and low-voltage conditions. Semiconductor excitation controller (SEC) of the DWIG utilizes control-winding voltage oriented control method to adjust the voltage, considering V/f characteristics. For the proposed topology, the SEC capacity and the excitation capacitor are optimized by analyzing the SEC reactive current considering wind turbine power-speed curve, V/f strategy, and the generator parameters. The method shows that the per-unit capacity of the SEC can be limited to the inverse of DWIG magnetizing reactance per-unit value. The topology is simulated in MATLAB/Simulink platform and experimented with a scaled 1 kW prototype. Both simulation and experimental results demonstrate wide variable speed operation range of the DWIG and verify the optimization.