| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 96 === For experiences of real-time voltage control in the power system, the dispatchers would utilize ways of putting in appropriate reactive power compensating devices and adjusting taps of the transformers to achieve expected voltage quality and to reduce the line loss of the systems. However, it will neglect frequent operations of on-and-off of those devices and may even cause further damage. The purpose of this research is to provide dispatchers with complete strategies to control system voltage in a right and fast manner. Firstly, the method of Linear Programming is applied to map out the taps that set by OLTCs of the transformers for the initial state. These strategies focus on prompt offering the dispatchers accurate and efficient methods to adjust system voltages. By way of doing so, the voltage can also be maintained within tolerance of equipment for the duration of dynamic operations, and so as to achieve the reduction of line loss. In this research, software PSS/E is used to simulate steady state of Taipower system, and then the methods are practically developed with Taipower system. Comparing both results, it can be seen that the methods would carry lower the numbers of operations of on-and-off of devices and reduce line loss of 0.09%. The result is proved to be helpful and valuable for the dispatchers with better alternatives of accurate, fast and safe operations.
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