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Harmonic Spectral Analysis of Unbalanced Switching in DC-AC Converters
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Sima Shahmohamadi *   1, Seyed hossein Hosseini1 , Ebrahim Babaei1 |
| 1- tabriz university |
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Abstract: (6985 Views) |
| The operation of DC-AC converters in most of researches is considered ideal and balanced but in practical applications no ideal and unbalanced cases must be considered. For instance semiconductor switches of a converter may have differences with together or switching circuit in an inverter may be unbalanced. This unbalance can produce additional harmonics such as even harmonics. This additional harmonics can cause many problems. For precise investigation of these harmonics, a model of inverter based on switching function model is presented in this paper. With this model, analytical relations of harmonics in unbalanced condition are obtained. This model is simple but precisely can show the effect of unbalance in switching of inverters. Analytical results for harmonics in unbalanced conditions in inverter switching are examined by MATLAB and PSCAD softwares. |
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| Keywords: Unbalanced switching angles, Additional harmonics, Three- phase inverters, Switching function model, Analytical relations |
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Full-Text [PDF 630 kb]
(3866 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2014/01/26 | Accepted: 2014/08/6 | Published: 2014/09/8
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