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並列摘要


Long interruptions cause no compensable problems to the power systems and decrease the reliability of the system significantly. One of new technologies that decrease the fault time is Static Transfer Switch (STS) with alternative power supply. In this study an industrial plant with motor loads has been studied with and without use of STS in front of a voltage fault. The simulations have been done to demonstrate the speed of the motors during the faults. As the interruption duration is an important factor in reliability analyzing, some faults with various durations have been applied to the system to study the reliability of the system with and without STS. The results are given to verify the STS efficiency in increasing the system reliability by restoring the motors' speed drop in least time.

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