儲(chǔ)能系統(tǒng)對(duì)獨(dú)立微電網(wǎng)穩(wěn)定性的作用研究
[Abstract]:With the development of economy and the need of building a harmonious socialist society, new energy generation and microgrid technology are gradually developed and strengthened. In the remote areas such as northwest China, they are constrained by natural conditions, and the clean wind energy resources are relatively rich. So most of them are wind power generation. However, there are still many problems that affect the power stability of microgrid system. In the normal and continuous operation of micro-grid, the energy storage system can not be separated from the energy buffer system. The energy storage device plays a very important role in the microgrid system, and there are many kinds of energy storage equipment, which is also very convenient to use, which provides a great guarantee for its stable operation. This paper focuses on the application of flywheel energy storage device in the case of frequency fluctuation in micro-grid system with wind turbine. Firstly, the development of microgrid and the application of energy storage system in microgrid are briefly introduced. By comparing the characteristics of several energy storage devices, the flywheel energy storage device has the advantages of high efficiency, rapid charge and discharge speed, environmental protection, etc. Therefore, the flywheel energy storage is chosen as the energy storage object in this study to adjust the frequency fluctuation in wind power system. Secondly, the basic structure and working principle of flywheel energy storage device are introduced, and the charging and discharging model of flywheel energy storage device is established. The power characteristic and output power classification of wind power system are introduced in detail. On this basis, the microgrid system is analyzed in detail, including its power transmission characteristics, operation mode, control method and control mode. Prepare for the following simulation. Finally, the effects of duty cycle, moment of inertia and friction coefficient on the charge and discharge of flywheel energy storage are simulated under MATLAB/Simulink. The frequency changes of the system with and without the flywheel are compared, and the frequency changes of the micro-grid with the flywheel are compared when the load changes. The simulation results show that the flywheel energy storage device can restrain the frequency fluctuation of the microgrid system, which proves the feasibility of the project.
【學(xué)位授予單位】:蘭州交通大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:TM727
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