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Comparative study of semiconductor power losses between CSI-based STATCOM and VSI-based STATCOM,both used for unbalance compensation

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Protection and Control of Modern Power Systems 2020年第1期5卷 56-69页

作者： Anas Benslimane Jamal Bouchnaif Mohammed Essoufi Bekkay Hajji Loukmane el Idrissi Laboratory Renewable energy embedded system and information processingNational School of Applied SciencesUniversity of Mohammed IOujdaMorocco Laboratory of Electrical Engineering and Maintenance Higher School of TechnologyUniversity of Mohammed IOujdaMorocco

In this paper,we present a detailed procedure to determine the semiconductor losses for both structures of a shunt STATCOM(Static Compensator),STATCOM based on Current Source Inverter(CSI)and STATCOM based on Voltage Source Inverter(VSI),both used for voltage unbalance *** a first step,we study the VSI-based STATCOM and the CSI-based STATCOM used in high speed railway *** we analyze the design and the sizing of the unbalance compensator in order to obtain an unbalance factor that does not exceed the limits imposed by the standards or by the energy *** that,we compare the performances obtained with both structures VSI-STATCOM and CSI-STATCOM,after calculating the semiconductor power losses in the STATCOM ***,we validate our approach by simulation over real data of unbalance compensation caused by the new high-speed railway in *** use the tools MATLAB/Simulink/Simpowersys for performing our simulations.

关键词： Power losses VSI CSI STATCOM unbalance compensation Railway

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compensation of unbalanced Impedance of Asymmetric Wind Power PMSG Compensated by External Circuits in Series

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CES Transactions on Electrical Machines and Systems 2017年第2期1卷 180-188页

作者： Yashan Hu Z.Q.Zhu Milijana Odavic Sheffield Siemens Wind Power Research Centre and Department of Electronic and Electrical Engineering University of SheffieldMappin StreetSheffield S13JDUK Royal Academy of Engineering

The unbalanced impedance of the asymmetric 3-phase wind power permanent magnet synchronous generator(PMSG)compensated by external circuits in series with the 3-phase windings is investigated in this *** asymmetric impedance includes the unbalanced resistances,unbalanced self-inductances,and unbalanced mutual *** the perspective of the second harmonic inductances in dq-frame and from the perspective of the second harmonic power,it is theoretically demonstrated that the original asymmetric 3-phase system with asymmetric impedance can be modified to a balanced system by external circuits consisting of resistances and ***,the second harmonic power and DC bus voltage due to the asymmetries can be suppressed naturally without any software *** feasibility of this compensation method is validated by elaborate experiments at different speeds and under different load condition,although the effectiveness might be slightly affected by the non-linearity of the compensation inductance in practice.

关键词： Asymmetry compensation in series second harmonic DC bus voltage unbalance compensation unbalanced impedance

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