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Research and Implementation of Control Technology for Islanded Microgrid System

Author: YangLei
Tutor: ZhaoJianDong
School: Beijing Jiaotong University
Course: Mechanical Manufacturing and Automation
Keywords: Islanded microgrid system control technology operation strategy prototype development
CLC: TM912
Type: Master's thesis
Year: 2011
Downloads: 403
Quote: 1
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Abstract


The islanded electricity-generating system, based on the microgrid technology, is the significant way to make full use of renewable energy and improve the stability of power supply system, the generating system can be formed by variety energy which are exchanged by electricity and formed microgrid again, the key technology of achieving efficient use of a variety of energy and coordinated operating it is the system control strategy. So it has both theoretical significance and practical value to research the control technology. The thesis do a research on controlling technology and operation strategy of the microgrid system which based on microgrid structure formed of solar energy, wind energy and diesel engine. And the main work contains the following content.(1) The thesis analyzed the basic composition and working principle of the islanded microgrid system, built the overall structure, calculated the capacity allocation of important components, and expounded the selection and working characteristics of the main hardware, adopted SOC setting strategy which based on the scheduling method of the microgrid system.(2) The thesis designed the total scheme of the control system and the hardware circuit which contained sampling detection circuit, relay protection circuit, state instructions circuit, serial communication circuit and power circuit. The software is structured with subroutine modules, mainly including AD sampling, status-indication, operation control and so on.(3) According to the structure of the microgrid system, the thesis drew the figures of mechanical structure and electrical hookup of the prototype system, built up and debugged the prototype. Besides, the experiment plat was built, and the key was debugging the control strategy, correcting the important control parameters and running the control strategy.(4) Through experiments, the thesis analyzed the input and output side of the removal-input impact of microgrid system, designed the experiments of stability and overloaded of the microgrid system, analyzed the data of the experiments and the performance of the control system. The experiments proved that the prototype could run in different working conditions, and the control strategy achieved the expected acquirement, and they also proves the feasibility and effectiveness of the islanded microgrid control strategy.

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