Multi-Input Inverter for Grid-Connected Hybrid PV/Wind Power System

Abstract

The objective of this paper is to propose a novel multi-input inverter for the grid-connected hybrid photovoltaic (PV)/wind power system in order to simplify the power system and reduce the cost. The proposed multi-input inverter consists of a buck/buck-boost fused multi-input dc-dc converter and a fullbridge dc-ac inverter. The output power characteristics of the PV array and the wind turbine are introduced. The perturbation and observation method is used to accomplish the maximum power point tracking algorithm for input sources. The operational principle of the proposed multi-input inverter is explained. The control circuit is realized by using a digital signal processor and auxiliary analog circuits. For practical applications, functions of soft-start and circuit protection are implemented. Experimental results have shown the performance of the proposed multi-input inverter with desired features.

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“…the fulfillment of load. An approach is to make system convenient with significant use of generation source by either way [7].…”

A 0.6V Low-power FGMOS Current Reference with Current Subtraction Technique

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“…A common practice is to adopt a cascaded connection of a battery charger and a converter (or inverter) to provide dc (or ac) voltage for the load. A multiple-port or multiple-input configuration becomes more popular because this allows the intake of multiple energy sources [9]- [13] such as a Photovoltaic panel, wind turbine, fuel cell, and battery at the same time, and favours the hybrid power system development. The Photovoltaic-battery dcdc converter for the proposed dc bus system has to achieve charging of the battery, Maximum power point tracking function, and provide tight output regulation, i.e., a dc-dc converter with high voltage gain and simple circuitry is required.…”