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:: Volume 3, Issue 1 (9-2014) ::
ieijqp 2014, 3(1): 46-55 Back to browse issues page
Harmonic Spectral Analysis of Unbalanced Switching in DC-AC Converters
Sima Shahmohamadi *1, Seyed hossein Hosseini1, Ebrahim Babaei1
1- tabriz university
Abstract:   (6778 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.
Keywords: Unbalanced switching angles, Additional harmonics, Three- phase inverters, Switching function model, Analytical relations
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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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shahmohamadi S, hosseini S H, babaei E. Harmonic Spectral Analysis of Unbalanced Switching in DC-AC Converters. ieijqp 2014; 3 (1) :46-55
URL: http://ieijqp.ir/article-1-150-en.html

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Volume 3, Issue 1 (9-2014) Back to browse issues page
نشریه علمی- پژوهشی کیفیت و بهره وری صنعت برق ایران Iranian Electric Industry Journal of Quality and Productivity
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