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"Event-triggered SMC-based FRT Approach for DFIG-based Wind Turbines Eq" by Md Nafiz Musarrat, Afef Fekih et al.

This paper proposes an event-triggered sliding mode control (SMC)-based fault ride through (FRT) strategy for doubly-fed-induction-generator (DFIG)-based wind turbines. An event-triggered SMC (ETSMC) approach is designed for a dynamic voltage restorer (DVR) with a high frequency isolated dc-dc converter. The aim is to regulate the stator terminal voltage by injecting appropriate voltage to regulate it near the reference point. Since the control signal in the event-triggered SMC is only updated when certain conditions are violated, the proposed approach results in reduced computational burden and channel bandwidth. Additionally, it reduces the chattering phenomena typically associated with SMC and reduces harmonic distortion. The ETSMC is augmented by a disturbance observer to further improve its robustness against mismatched uncertainties. The DVR topology considered in this paper utilizes high frequency isolation transformer, which dramatically reduces the costs associated with the re ....

Dynamic Voltage Restorer , Event Triggered Smc , Fault Ride Through , High Frequency Transformer , Wind Turbines , High Frequency , Voltage Control , Wind Energy ,

"Electromagnetic Characterization of Multi-winding High Frequency Magne" by Mahbubur Rahman Kiran, Md Rabiul Islam et al.

Soft ferrite magnetic materials are widely used for the design of high frequency magnetic links (HFMLs) for emerging power converter applications. In these power converter modules, the HFMLs are excited by the high frequency inverter outputs. These output signals are typically non-sinusoidal such as square, trapezoidal, and triangular. In this paper, a multi-winding HFML (MWHFML) is mathematically modeled and designed in ANSYS/Maxwell environment. The operating frequency is considered as 100kHz. The MWHFML has multiple inputs and single output terminal connected with load. After simulation, the electromagnetic characterization is performed such as analyzing the load currents, transient magnetic flux density, magnetic flux intensity as well as load profile. The load inductance effects on the magnetic flux density are presented. Ii is recommended that, the characterization would perform imperative part for the advance of competent power converter technologies. ....

More Loss , High Frequency Transformer , Power Converter ,