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A new hysteretic control strategy with output capacitor equivalent series resistance (ESR) ripple compensation is presented. With such compensation, the effect of output capacitor ESR ripple voltage is enhanced. When step load change occurs, feedback of the output ripple adjusts the duty ratio promptly. In result, the proposed control scheme gains faster transient response speed and better steady...
In order to increase the output voltage range of photovoltaic panels, battery and fuel cell monomer efficiently in the distributed generation system, In this paper, a novel Z-source high step-up boost converter is presented. With a unique X-type Z-source network, clamping voltage of pump capacitor is improved. The proposed converter achieves a high voltage gain without an extremely switch duty cycle...
A new hysteretic control strategy with output capacitor equivalent series resistance (ESR) ripple compensation is presented. With such compensation, the effect of output capacitor ESR ripple voltage is enhanced. When step load change occurs, feedback of the output ripple adjusts the duty ratio promptly. In result, the proposed control scheme gains faster transient response speed and better steady...
In this paper, a new constant on-time control with output capacitor equivalent series resistance (ESR) ripple compensation and offset cancellation for buck converter is presented. The proposed controller uses lossless capacitor current sensing circuit and an offset-cancellation circuit, which not only improves system stability, but also eliminates the output dc offset.
A number of algorithms have been proposed for the MPPT of PV modules, but the performance of these algorithms depends on the environmental conditions and also on the type of load (resistive and battery). In this paper, a duty cycle modifier is introduced which optimizes the performance of the existing MPPT techniques by modifying the duty cycle obtained from the MPPT algorithm. The duty cycle modifier...
This paper presents a modulation scheme for the cascaded H-bridge multi-level converter based on space vector modulation. The method is modified from other implementations in two ways. Switching states are chosen to keep the d.c. link voltages on each bridge equal and a modified co-ordinate transformation is employed to compensate for d.c. link voltage ripple. A constraint for minimal switching is...
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