Study on the Operations and Optimal Dispatch of a Low-Voltage Microgrid

• Main Authors: Ling-Yi Hong, 洪聆議
• Other Authors: Wei-Tzer Huang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/77254339841779366280

碩士 === 建國科技大學 === 電機工程系暨研究所 === 98 === The main purpose of this thesis is to study the operations and optimal dispatch of a low-voltage microgrid. First of all, the related papers and technological reports were extensively surveyed, and the operating natures and mathematical models of the distributed energy resources (DERs), which were emerged into the secondary distribution networks, were also realized and discussed. According to the related studies mentioned above, a low-voltage microgrid was utilized as a sample system that was modified from the EU project “Microgrids” with Contract ENK5-CT-2002-00610 in this thesis. The proposed microgrid was composed of a 50 kW diesel engine generator, three 30 kW micro turbine generators, five 10 kW proton exchange membrane fuel cell (PEMFC) generation systems, three 10 kW wind turbine generators, as well as two 2.5 kW modules and four 3 kW modules of photovoltaic generation system. Next, the mathematical models of individual DERs were modeled for the integrated analysis by the professional commercial package, Matlab/Simulink; besides, the implicit ZBUS Gauss method, direct search method, and linear programming method were applied to solve for the optimal dispatch of the DERs and the three-phase power flow under grid-tied and islanding operation conditions. Finally, the results of this thesis can provide for the part of industry, government, and academia as the references and applications of the optimal operations and dispatch of the microgrid that formed by the DERs emerging into the secondary distribution networks whose voltage level are below 600 V.