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 full-bridge 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
Conference Paper: Design of DC - DC converter for hybrid wind solar energy system[Show abstract] [Hide abstract]
ABSTRACT: Environment friendly solutions are becoming more prominent than ever, as a result of the concern regarding the state of our deteriorating planet. This project presents a new system configuration of the front-end converter stage for a hybrid wind/photovoltaic energy system. The aim of this project is to implement the converter and inverter for the wind and solar hybrid system. For the hybrid system, extracting as much energy from the wind and solar as possible, and feeding the load with high quality electricity are the two main targets. This strategy makes the hybrid DG system work properly, when a voltage disturbance occurs in distribution the system, and it stays connected to the main grid. Boosting the DC voltage to a sufficient level using the converter, and obtaining pure AC voltage from the inverter, are the keys to realize the above targets. This configuration allows the two sources to supply the load separately or simultaneously, depending on the availability of the energy sources. The inherent nature of this cuk-SEPIC fused converter is that additional input filters are not necessary to filter out high frequency harmonics. This project describes the closed loop mechanism of the cuk and SEPIC converter, and the simulated results are presented.Computing, Electronics and Electrical Technologies (ICCEET), 2012 International Conference on; 01/2012
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ABSTRACT: This paper presents a dynamic modeling and control strategy for a sustainable microgrid primarily powered by wind and solar energy. A current-source-interface multiple-input dc-dc converter is used to integrate the renewable energy sources to the main dc bus. Potential suitable applications range from a communication site or a residential area. A direct-driven permanent magnet synchronous wind generator is used with a variable speed control method whose strategy is to capture the maximum wind energy below the rated wind speed. This study considers both wind energy and solar irradiance changes in combination with load power variations. As a case study a 30-kW wind/solar hybrid power system dynamic model is explored. The examined dynamics shows that the proposed power system is a feasible option for a sustainable microgrid application.IEEE Transactions on Smart Grid 01/2012; 3(4):1867-1876.