- 學位論文
核能電廠控制中心穩壓系統之模擬分析
Simulation and Analysis for Voltage Regulation of Control Center of a Nuclear Generation Plant
摘要
某發電廠控制中心於民國99年3月發生穩壓系統CVCF-0100A3事故。雖然台電對於事故已進行初步調查與試驗並請CVCF廠家深入瞭解本系統不穩定之原因，並提出改善建議與措施。但對於CVCF的工作原理以及為何造成過電壓現象仍然不甚了解。 某發電廠控制中心的穩壓系統係以鐵磁共振穩壓變壓器來達到穩壓的目的。本研究的目的在於說明某電廠控制中心所使用的CVCF工作原理，並利用Matlab Simulink建立本研究所假設之等效電路進行模擬，觀察電容器的故障是否會對穩壓功能產生影響。研究顯示在減少一定比例電容值的情況下，若是輸入電壓的純度遭到汙染，則輸出會產生過電壓的情況，推測這就是3月事故的原因。
並列摘要
Accident on Voltage regulator system of control center of Lunmen generation plant has occurred at 13:45 on March 31 2010. Although Taipower has conducted a preliminary investigation which result in the over –voltage as cause of the incident and requested manufacturer of CVCF to find out the reasons why this system was not stable, and to improve the system. But the working operation and the reason for over-voltage is still not clear. This research clarifies the operation phenomena of ferroresonance transformer which is adopted for the voltage regulation of CVCF by studying the operation theory, and by using Matlab Simulink to simulate the operation of ferroresonance transformer. The result shows that when the capacitance of the resonance circuit is reduce to certain percentage the resonance can result in an over-voltage if the power source is contaminated with high frequency impulses which is assumed as the main cause for this accident.