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This paper presents the application of space-vector based hysteresis current control in the synchronous reference frame for grid connected voltage source converters. The space-vector based approach allows for systematic application of zero-voltage vectors and prevents high switching frequencies caused by phase interaction. The average switching frequency can be minimized by always selecting the zero-voltage...
Self oscillating control of LCC current-output resonant converter is presented based on varying the phase angle between the fundamental of the input voltage and current. Unlike other commonly employed control methodologies, the proposed technique is shown to provide a convenient, linear system input-output characteristic suitable for the design of regulators. The method is shown to have a similar...
With the rapid growth of energy generation by regenerative decentralized sources and the continuous replacement of overhead power lines by subterraneous distribution grids, the amount of power supply cables is increasing. In consequence, a large demand for mobile high-voltage cable test systems is expected within the coming years. This contribution deals with modeling and control design of a novel...
Reduction of switching losses is an important issue in development of high power multilevel converters. Improvement of the known soft switching techniques to find application in multilevel topologies is therefore a worth attempt started recently. This paper proposes a new auxiliary circuit for the flying capacitor multilevel converters realizing soft switching conditions for these converters using...
A ZVS bi-directional DC-DC converter for high-low voltage conversion is analyzed in this paper. A novel control scheme adopting one port voltage regulated and another port current regulated is proposed to realize the energy conversion in bi-directional freely. A start-up circuit is presented for eliminating the surge current in boost mode. The operation characteristics and parameter design are analyzed...
Inner current loop modeling of a resonant DC link inverter, soft switching combination inverter, which works in current controlled three state discrete pulse modulation mode, is proposed. The modeling method is valid for double loop feedback controlled inverters which works in other modulation mode. Equivalent analytic model is established and used for voltage regulator design. Example are given in...
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