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Investigation for Avoiding Nonlinearities in DC-AC Power Converters
2018A study has been carried out for nonlinear phenomena in DC-AC power converters under this paper. High power DC-AC converters are widely used in HVDC and in AC motor drive applications. There are several sources of undesired nonlinearity in practical power inverters. In addition, their operation is characterized through switching thatgenerates a variety
Kumar, Sanjeev +2 more
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Improved Direct Power Control of Grid-Connected DC/AC Converters
IEEE Transactions on Power Electronics, 2009This paper proposes new direct power control (DPC) strategies for three-phase DC/AC converters with improved dynamic response and steady-state performance. As with an electrical machine, source and converter flux, which equal the integration of the respective source and converter voltage, are used to define active and reactive power flow.
Zhi, Dawei, Xu, Lie, Williams, Barry
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Sliding-mode control of power converters: AC/DC converters & DC/AC inverters
International Journal of Control, 2018Sliding-Mode Control (SMC) has been widely utilised to control nonlinear systems with uncertain dynamics.
Yazan M. Alsmadi +4 more
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PSO optimal tracking control for a DC-AC power converter
2014 World Automation Congress (WAC), 2014This contribution presents an infinite-horizon optimal tracking controller for nonlinear systems based on the state-dependent Riccati equation approach. The synthesized optimal control law comes from solving the Hamilton-Jacobi-Bellman equation for state-dependent coefficient factorized nonlinear systems.
Guillermo C. Zuniga +2 more
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Efficiency improvement of a DC/AC converter with the power decoupling capability
2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2012Single-phase DC/AC converters require large electrolytic capacitors to reduce the DC bus voltage ripples at twice the grid frequency. In this paper, a boost-type power decoupling circuit is adopted to absorb the low frequency ripple, and allow the use of film capacitors for long life-time as required by the photovoltaic power conversion system ...
Chia-Tse Lee +3 more
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AC/DC/AC converter in a small hydroelectric power plant
Bulletin of the Polish Academy of Sciences: Technical Sciences, 2011AC/DC/AC converter in a small hydroelectric power plant The article discusses application of AC/DC/AC converter cooperating with an induction generator in small hydroelectric power plants. The induction generator works with power grid or a separated group of receivers, enabling to generate power even at low speeds of the turbine.
A. Sikorski, M. Korzeniewski
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DC-AC photonic power converters with liquid crystal optical modulators
Optics LettersIn this Letter, we propose a power-switch-free (PSF) DC–AC photonic power converter (PPC) that utilizes liquid-crystal optical modulators (LCOMs) to commutate optical flux, thereby eliminating the need for power switches and avoiding switching-induced electromagnetic interference (EMI).
Guidong Zhang +5 more
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Novel regulated DC/DC and DC/AC power converters
International Journal of Renewable Energy Technology, 2009Power sources with a desired voltage profiles, are required in many applications including renewable energy. Although in most cases, a sinusoidal waveform of specified amplitude and frequency is of interest, other types of voltage profiles, such as square, trapezoidal, triangular, etc., may also be required in amplifiers, shakers, mechatronics, etc ...
Suvarun Dalapati, Chandan Chakraborty
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An Improved DC-AC Power Converter
2023 IEEE AFRICON, 2023Candidus U. Eya +5 more
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Predictive Control Strategy for DC/AC Converters Based on Direct Power Control
IEEE Transactions on Industrial Electronics, 2007This paper proposes predictive direct power control (P-DPC), a new control approach where the well-known direct power control is combined with predictive selection of a voltage-vectors' sequence, obtaining both high transient dynamics and a constant-switching frequency.
Sergio Aurtenechea Larrinaga +3 more
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