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wlxwlx1026: ½ð±Ò+80, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2013-04-26 07:30:52
°®ÓëÓêÏÂ: ½ð±Ò-40 2013-04-26 21:45:55
°®ÓëÓêÏÂ: ½ð±Ò-40 2013-04-26 21:46:03
°®ÓëÓêÏÂ: ½ð±Ò-40 2013-04-26 21:45:55
°®ÓëÓêÏÂ: ½ð±Ò-40 2013-04-26 21:46:03
| In recent years, with the rapid development of subway, and the rise of the HVDC project, China's electricity consumption increases, the DC breaker demand increases. Different from the ordinary circuit breaker, due to DC breaking no natural zero, so the domestic and foreign researchers generally use artificial zero-crossing method is the DC current in normal or fault on the high-frequency current superimposed a reverse to create zero, this method has become one of the research focus in the field of high voltage electrical apparatus. Solve the fundamental DC interruption is extinguished arc, so must understand the forms and characteristics of arc quenching process, the digital image processing technology has matured to become possible, using high-speed camera to record the arc interrupting process and analysis and sums up the characteristics of DC arc. |
3Â¥2013-04-25 23:59:25
yangruyiyantai
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°®ÓëÓêÏÂ: ½ð±Ò+1 2013-04-24 19:11:31
wlxwlx1026: ½ð±Ò+20, ¡ïÓаïÖú 2013-04-26 07:31:01
°®ÓëÓêÏÂ: ½ð±Ò+1 2013-04-24 19:11:31
wlxwlx1026: ½ð±Ò+20, ¡ïÓаïÖú 2013-04-26 07:31:01
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½üÄêÀ´£¬Ëæ×ŵØÌú¡¢½¢´¬µÄÐËÆðÒÔ¼°¸ßѹֱÁ÷Êäµç¹¤³ÌµÄ¿ìËÙ·¢Õ¹£¬ÎÒ¹úµÄÓõçÁ¿Öð½¥Ôö¼Ó£¬Ö±Á÷¶Ï·Æ÷µÄÐèÇóÒ²ËæÖ®Ôö¼Ó¡£in recent years,along with the development of railway and ships as well as the fast development of D.C. high-voltage transmission, the electricity consumption are increasing gradually,thus demand of direct current breaker are increasing too.²»Í¬ÓÚÆÕͨ¶Ï·Æ÷£¬ÓÉÓÚÖ±Á÷¿ª¶ÏÎÞ×ÔÈ»¹ýÁãµã£¬Òò´Ë¹úÄÚÍâÑо¿ÈËÔ±ÆÕ±é²ÉÓÃÈ˹¤¹ýÁãµÄ·½·¨¼´ÔÚÕý³£»ò¹ÊÕϵÄÖ±Á÷µçÁ÷Éϵþ¼ÓÒ»¸ö·´ÏòµÄ¸ßƵµçÁ÷À´´´Ôì¹ýÁãµã£¬ÕâÖÖ·½·¨³ÉΪ¸ßѹµçÆ÷ÁìÓòÑо¿µÄÈȵãÖ®Ò»¡£different from common current breaker, DC current breaker has no natural zero-crossing point.consequently,researchers at home and abroad commonly .....this method have been a hot topic in high voltage equipment. ½â¾öÖ±Á÷¿ª¶ÏµÄ¸ù±¾¾ÍÊÇϨÃðÖ±Á÷µç»¡£¬Òò´ËÐëÁ˽âµç»¡Ï¨Ãð¹ý³ÌÖеÄÐÎ̬¼°Ìص㣬Êý×ÖͼÏñ´¦Àí¼¼ÊõµÄÈÕÇ÷³ÉÊìʹ֮³ÉΪ¿ÉÄÜ£¬ÀûÓøßËÙÉãÏñ»ú¶Ô¿ª¶Ï¹ý³ÌµÄµç»¡ÐÎ̬½øÐмǼ²¢½øÐзÖÎö´Ó¶ø×ܽá³öÖ±Á÷µç»¡µÄÏà¹ØÌØµã¡£... |

2Â¥2013-04-24 17:43:07













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