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Design of Distributed Grid-Connected Power System Based on PEMFC

Author: LiuXiaoQiang
Tutor: ChenWeiRong
School: Southwest Jiaotong University
Course: Proceedings of the
Keywords: Distributed generation Proton exchange membrane fuel cell Grid system Islanding detection
Type: Master's thesis
Year: 2011
Downloads: 89
Quote: 1
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More serious environmental pollution due to coal, oil and other primary energy, while prices continued to rise, and gradually increased concern about people polluting, renewable energy distributed generation. Relatively centralized power, distributed generation (Distributed Generation, referred to as DG) can be installed near the user, reducing the cost of transmission engineering department remote areas as well as the reliability of power supply requirements of high-powered, distributed generation and traditional centralized power generation combined can save costs and improve the power grid as a whole benefits, and improve the reliability of power supply. Fuel cells, solar, wind, hydro, biomass and micro turbines belong to the rapid development in recent years, distributed power, fuel cell with high efficiency, modular, environmentally friendly, and capacity needed multi kinds of advantages, has been widespread concern, is expected to gradually achieve commercialization. But its output is unstable DC, thereby requiring the conversion of power electronic devices such as stable AC for local load or use. In this paper, based on proton exchange membrane fuel cell (PEMFC, Proton Exchange Membrane Fuel Cell) distributed and grid systems design and Nexa 1.2kW fuel cell power generation system as a platform, and network test. The second chapter of the characteristics of the fuel cell principle, classification and modeling, distributed generation network standard IEEE 1547-2003 and grid power system may produce. Chapter of fuel cell distributed power generation system design, determine the overall scheme of the grid system, select DC / DC DC / AC single inverter two transform system structure, DC / DC voltage control Boost structural, DC / AC double loop control of voltage and current full-bridge configuration. The paper combined with the overall design of the program, given the islanding detection algorithm, that is, using a combination of active and passive detection. Chapter IV using Matlab / Simulink for modeling and simulation of fuel cell distributed power generation system, the simulation results show that distributed generation system output current can better track the grid voltage harmonic content within the allowable range and network operation inner and verify the feasibility of the present design. Familiar with Nexa 1.2kW fuel cell power generation system platform based on distributed generation fuel cell system and network tests, test results show the effect of the output current of the grid voltage tracking ideal distributed power generation system and distribution system together to power the load, and verify the effectiveness of the system design.

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