Ferroresonance at Open Phase Operating Conditions of Power Transformers  

作　　者：Hani Obeid 

机构地区：[1]Electrical & Computer Department, Faculty of Engineering, Applied Sciences University, Amman 11195, Jordan

出　　处：《Journal of Energy and Power Engineering》2012年第10期1714-1717,共4页能源与动力工程（美国大卫英文）

摘　　要：The reliability of electric supply to consumers is one of the most important factors that determine the requirements imposed on modem utility companies. This paper presents the results of investigation by computer software of the overvoltages resulting from a ferroresonance conditions in MV networks at open phase operating condition with and without connection to earth on source and load sides of distribution transformer. This overvoltage may reach 4.2 pu on one of the HV side of transformer unswitched phases. The results of the study show that ferroresonance overvoltage may be controlled by replacing fuses with circuit breakers on HV side to ensure switching-off all phases. Insertion of resistor or reactor in the neutral of source and loadsides of the transformer with 5% active load will help in suppressing overvoltages.

关 键 词：FERRORESONANCE OVERVOLTAGE open phase operating condition non-linear inductance. 

分 类 号：TM41[电气工程—电器] TV736[水利工程—水利水电工程]