| Summary: | 碩士 === 中原大學 === 電機工程研究所 === 98 === The design of Microgrid 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.
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.
This paper divides into two parts generally, the first part to compare the Microgrid test report which CERTS proposed with domestic commonly used multiple grounding system. The second partial basis the of Institute of Nuclear Energy Research (INER), discuss the fault characteristic and protection coordination when Microgrid operated in Grid-Connected mode and Island mode, proposed the suitable fault detection method in the 220V/380V system and the 120V/208V system. It can be a useful tool in designing and developing Microgrid.
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