A Three-Phase AC-DC High Step-up Converter for Microscale Wind-power Generation Systems

Abstract

In this paper, a three-phase AC-DC high step-up converter is developed for application to microscale wind-power generation systems. Such an AC-DC boost converter prossessess the property of the single-switch high step-up DC-DC structure. For power factor correction, the advanced half-stage converter is operated under the discontinuous conduction mode (DCM). Simulatanously, to achieve a high step-up voltage gain, the back half-stage functions in the continuous conduction mode (CCM). A high voltage gain can be obtained by use of an output-capacitor mass and a coupled inductor. Compared to the output voltage, the voltage stress is decreased on the switch. To lessen the conducting losses, a low rated voltage and small conductive resistance MOSFETs are adopted. In addition, the coupled inductor retrieves the leakage-inductor energy. The operation principle and steady-state behavior are analyzed, and a prototype hardware circuit is realized to verify the performance of the proposed converter.

A Novel Fixed-Time-Convergent Sliding Mode Technology Using Improved Quantum Particle Swarm Optimization for Renewable Energy Inverters

“…Simulations and experimentation results exhibit that the suggested REI possesses good performance in smaller than voltage THD and dip, which exceed specified IEEE standards under diverse load situations. As a result, the suggested controller will inspire the author to realize closed-loop architectures of other new circuits, for instance a high step-up converter of wind energy system, detection circuit of ground insulation fault, and LED street light driver [48][49][50]. The author is also convinced that the renewable energy correlative circuits (both an AC-DC rectifier and DC-DC converter) can definitely be integrated into the presented REI, generating more contributions in control of power electronic converters.…”