This article encompasses a technical and mathematical description of the six-pulse drives used in industry and the verification of the percentage of current harmonics produced by each of them. An analysis of the total harmonic content produced by the six-pulse drives commonly used at Bralima RD Congo will be carried out, for this purpose the harmonic spectra given by the drive manufacturer are simulated in ETAP software to subsequently run a harmonics stream and assess compliance with technical service quality indices. In the event of non-compliance, the harmonic mitigation techniques will be plated and verified. The result includes analyzes and simulations based on real Bralima data and a technical guide for mitigating the harmonic currents produced by six-pulse drives is presented.
Today the power quality of industrial systems is a growing concern for electrical and electronics engineers. The main reason for deteriorating power quality is the high level of harmonics. Harmonics in industry are produced from many sources, primarily variable speed drives and rectified loads. The injection by non-linear loads of harmonic currents contributes significantly to the degradation of the power factor resulting in an increase in reactive power and apparent power. In this study, the analysis of harmonics will be presented in the brewing industry case of Bralima DR Congo using a PEL 103 meter. The measured THD values for voltage and current will be used to analyze their impact on the power factor. Some solutions are proposed for the reduction of harmonics and the correction of the power factor (PFC) at the same time in order to reduce the reactive and apparent powers and also to reduce the energy consumption impacting on the expenses due to the billing of electrical energy.
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