Space Vector Pulse Width Modulation Strategy for Indirect Matrix Converters under Abnormal Input Voltage Conditions
Journal Title: IOSR Journals (IOSR Journal of Electrical and Electronics Engineering) - Year 2018, Vol 13, Issue 1
Abstract
Matrix converter is a single-stage power conversion device for AC-AC without dc link of energy saving elements. Any disturbance in input voltage will be reflected immediately in output voltage. In this paper, different kinds of power electronic converters are introduced and then matrix converters are discussed completely comparing their position with other Alternating Current (AC) converters. Moreover, different types of switching methods in matrix converters are examined in terms of being direct or indirect and then Venturini algorithms and spatial vector modulation (SVM) are compared for use in this type of converters. The modified SVM strategy for matrix converter is presented under the abnormal, unbalanced and non-sinusoidal input voltage conditions that were calculated using the instantaneous size and phase of the input voltage vector to calculate the voltage modulation index and the input current phase angle. Moreover, the modified modulation strategy that is without extra control circuit could reduce influence of abnormal input voltages on output voltage; and voltage and symmetrical sinusoidal three-phase current can be obtained under the normal and abnormal input voltage. This study was conducted to provide a modulation technic in which, switching times of keys in inverter sector have an equation based on the number of considered sector that its reference voltage (Vref) is in the sector at that moment. To obtain such equation, dependence of modified SVM method on modulation index can be removed if it is necessary.
Authors and Affiliations
Rahim Khazabi, M. J. Semnani
Keywords
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- EP ID EP388588
- DOI 10.9790/1676-1301028193.
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