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      저자 : Y. Kumsuwan (검색결과 2 건)
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      • Current Sector Control for a Three-Phase Three-Level PFC Rectifier

        O. Tubburee,Y. Kumsuwan 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6

        In this paper, a control algorithm of a three-phase three-level power factor correction (PFC) rectifier, using a mathematical analysis of two-level space vector modulation (SVM), is presented. The proposed control scheme was developed, in order to generate the duty cycle signals for each switching device based on the discontinuous space vector modulation (DSVM) method. For this proposal it is not essential to determine the direction of line currents and sector of vectors, only to recognize the angle of the input reference voltage. Furthermore, the number of commutations of switches and switching losses are reduced due to the DSVM method. Simulation and calculation results can confirm the feasibility of the control algorithm and performance of the proposed rectifier.

      • Static Series-Connected Compensator with Control of Load-Side Using Three Single-Phase H-Bridge Inverters

        K. Daychosawang,Y. Kumsuwan 제어로봇시스템학회 2013 제어로봇시스템학회 국제학술대회 논문집 Vol.2013 No.10

        In this paper, a static series-connected compensator with load-side connected shunt converter and a voltage sag detection control strategy are proposed. The proposed system uses three single-phase H-bridge inverters with the unipolar pulsewidth modulation technique. The control strategy for the series converter is based on the transport delay phase-locked loop for each phase in a three-phase system. The aim of this research is to improve the voltage restoration of static series-connected compensator, by which the voltage on the load-side can be restore under voltage sag condition as well as normal condition including symmetrical and asymmetrical voltage sags. The simulation results confirm the feasibility of the proposed system which was compared with the supply-side connected shunt converter of the static series-connected compensator for both symmetrical and asymmetrical voltage sag conditions.

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