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1¡¢ µçÁ¦ÏµÍ³ Äܹ»°²È«Îȶ¨ÔËÐÐ ÊǹúÃñÌá¸ßÉú»îÖÊÁ¿ºÍ¹úÃñ¾­¼Ã¸ßËÙ·¢Õ¹µÄ±£Ö¤,µçÁ¦ÏµÍ³¼Ìµç±£»¤ Ôòµ£¸º×Å ¿ìËÙÇгý¹ÊÕÏ,¼°Ê±»Ö¸´¹©µçµÄ ÖØÒªÈÎÎñ¡£µçÁ¦±äѹÆ÷ ×÷ΪµçÁ¦ÏµÍ³ÖÐÒ»ÖÖ²»¿ÉȱÉÙµÄ µçÆøÉ豸,ÔÚµçÁ¦ÏµÍ³ÖÐÕ¼Óм«ÆäÖØÒªµÄµØÎ»,ËüÔÚµçÁ¦ÏµÍ³Öе£¸º×Šת»»ÊàŦµÄ×÷ÓÃ, Ò»µ©·¢Éú¹ÊÕÏ ½«»áÔì³É¾Þ´óµÄ¾­¼ÃËðʧ¡£²î¶¯±£»¤ ×÷Ϊ±äѹÆ÷µÄ Ö÷±£»¤£¬³¤ÆÚÔËÐо­Ñé±íÃ÷ ²î¶¯±£»¤ Äܹ»ÁéÃôµØÇø·Ö ±äѹÆ÷ÇøÄÚºÍÇøÍâ¹ÊÕÏ£¬µ«ÔÚ±äѹÆ÷ ¿ÕÔØºÏÕ¢ »òÍⲿ¹ÊÕÏÇгýʱ£¬Ôò»á³ö ÏÖÀø´ÅÓ¿Á÷£¬Àø´ÅÓ¿Á÷µÄ ³öÏÖ½«»áµ¼Ö ²î¶¯±£»¤Î󶯡£Òò´Ë£¬Õýȷʶ±ð Àø´ÅÓ¿Á÷ ÊDZ£Ö¤±äѹÆ÷ ²î¶¯±£»¤ ¿É¿¿ÔËÐÐµÄ ¹Ø¼üËùÔÚ¡£

1. The stable and safe operation of power system is the foundation for the improvement of national life quality and for the rapid development of socio-economy. The relay protection of power system takes charge of the vital task such as fast fault-clearing and timely power restore. As an essential electrical equipment, the power transformer plays a key role in the power system,serving as power transformation hub. Huge economic loss will be caused once the transformer fault occurs. Differential protection (DP) is the major protection for the transformer, and according to the long-term operation experience, DP can sensitively to distinguish the internal and external faults. However in the processes of no-load closing or clearing external faults, the magnetizing rush current will occur, which will cause the misoperation of DP. Therefore, the proper identification of magnetizing rush current is the key factor for the stable operation of differential protection of power transformer.


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Research of magnetizing rush current of power transformer and the identification method
2Â¥2015-04-10 21:59:29
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