Fast Simulation Methods for Microgrid

• Main Authors: Li-Kai Cheng, 鄭力凱
• Other Authors: Shi-Lin Chen
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/32546386747662889047

碩士 === 中原大學 === 電機工程研究所 === 97 === Microgrid is a revolutionary concept and new vision for power system development. The loads in a microgrid, other than the power transmitted from a power utility, they can also be power supplied from a distributed generator located nearby, called grid connected mode. When a contingency occurs in power utility’s line, microgrid can turn into island mode which is isolated from utility’s grid. Microgrid can provide electricity customers a stable and continuous power supply without outage disturbance. The nearby distributed generator can reduce the energy waste caused in line loss, therefore the energy can be used more efficiently. The design of microgid is different from the design of a traditional power system. Microgrid adopts a combination of various reliably renewable resources to provide power energy and uses distributed control to meet varied demands. It is quite different from the one as in central control that is utilized in the traditional power system. This paper collects detailed information of the development of microgrid system in several countries. The differences between microgrid and the traditional power system are compared. Furthermore, a thorough study is completed on the characteristics and the network structure of microgrid. A set of fast analysis methods for microgrid study are proposed, including power flow, protection methodology and frequency drift. These fast methods can give a quick analysis to present an overview feature of the studied system. It can be a very useful tool in designing and developing microgrid.