Based on the analysis of operation characteristics fault direct-drive permanent magnet wind turbine and existing protection strategies, in order to improve low-voltage capability turbine, a new coordinated control strategy for crossing is proposed this paper, which includes DC brake system unloading circuit, double second-order generalized integral phase-locked control, extracting positive nega...

A novel converter topology interfacing hybrid distributed energy sources and dc bus is proposed in this paper for integration of renewable energy sources with residential micro grid. This converter has low number of active device compared to the converters usually applied to similar application. Multi-Winding transformer is employed for achieving Low input and output current ripple, high voltag...

In this study, two types of multilevel convertors, cascaded multilevel inverter with separate DC sources and diode clamped multilevel inverter with common DC source are modeled and compared in the case of feeding of an induction motor. Here, SHEPWM technique is used as the switching strategy. Also a new variable torque feedback control on modulation index is presented, to preserve the induction...

Renewable energy sources like solar and fuel cells are emerging as a promising supplementary power sources due to their merits of cleanness, high efficiency, and high reliability. But the output levels of these are low. An isolated bidirectional full-bridge dc–dc converter can be used for interfacing battery to the system. Because of the presence of leakage inductance of the isolation transform...

Converter-interfaced renewable energy sources (CIRESs) may have a different fault current angle with synchronous generators (SGs), so the large difference on both sides will cause low sensitivity or failure for traditional proportional braking differential protection. So as to cope this issue, new control strategy is put forward. By analyzing phasor diagram during asymmetric faults, reasonable ...

This paper presents the implementation of Single Phase 7 level Multilevel DC link (MLDCL) Inverter with Half Bridge Cell topology. For N level inverter, (N-1)/2 half bridge cells are required with the same number of voltage sources. In this inverter topology, 3 Half Bridge Cells are used along with 3 voltage sources, each have 100V DC. These half bridges are connected in series to form a Multil...

in this paper, we discuss the ways that communication accommodation theory (cat) can be a useful framework for understanding and diagnosing interactional issues in interpersonal and intergroup conflict situations. we argue that the theory’s construct of attuning strategies provides a multidimensional view of mutual adjustment, leading to insights relevant to successful versus unsuccessful confl...

There is a need to design DC-DC converters capable of handling high voltages and that employ single-stage conversion integrate renewable energy resources, such as solar photovoltaic cells fuel cells, for electric vehicle applications. This paper elucidates the analysis dual input single output non-isolated Cuk-derived converter with step-up ratio. The proposed can effectively handle two differe...