{'fraction_non_alphanumeric': 0.022163120567375887, 'fraction_numerical': 0.0008865248226950354, 'mean_word_length': 5.4147727272727275, '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}}
Harmonics Reduction of Adjustable Speed Drive using Multi-Objective Dynamic Voltage Restorer

A control technique for dynamic voltage restorer (DVR) based on DC-link voltage of uncontrolled rectifier fed adjustable speed drive (ASD) is described in this paper. This control technique maintains constant DC-link voltage during harmonics, unbalance, sag and swell. Moreover, using this control technique, voltage harmonic introduced by ASD in utility is also suppressed by DVR during idle mode. A typical topology of ASD, implemented with uncontrolled rectifier is presented in this paper. A mathematical description to generate reference DC-link voltage is illustrated in this paper using the dq0 reference frame. A simulation study of the proposed control technique of DVR protecting ASD during source harmonics, unbalance, sag and swell is carried out using MATLAB/Simulink software and results of ASD parameters are presented. Moreover, the simulation results of ASD voltage harmonics mitigation by DVR is also presented. The performance of the proposed technique shows satisfactory results with a less complex control system.