Ñ¡ÔñƽÐеçÀµĶµçѹƷ¼¶Ðè×ÛºÏ˼Á¿ÏµÍ³µçѹ¡¢×°ÖÃÇéÐΡ¢¸ºÔØÌØÕ÷¡¢Çå¾²Ô£¶È¼°±ê×¼¹æ·¶µÈÒòËØ¡£¡£¡£¡£ÈôµçѹƷ¼¶Ñ¡Ôñ²»µ±£¬£¬£¬£¬£¬£¬¿ÉÄܵ¼Ö¾øÔµ»÷´©¡¢×°±¸Ëð»µÉõÖÁÇ徲ʹʡ£¡£¡£¡£ÒÔÏÂÊÇÏêϸѡժҪÁì¼°ÐÐÒµ°¸Àý£º
Ò»¡¢Ã÷ȷϵͳµçѹÓëµçÀ¶µçѹµÄ¹ØÏµ
1. Ã÷È·¶î¶¨µçѹµÄ½ç˵
¶î¶¨µçѹ£¨U?/U£©£º
U?£ºµçÀµ¼ÌåÓë½ðÊôÆÁÕϲã»ò½ðÊôÌ×Ö®¼äµÄÉè¼Æµçѹ£¨Ïàµçѹ£©¡£¡£¡£¡£
U£ºµçÀÂϵͳí§ÒâÁ½ÏർÌå¼äµÄÉè¼Æµçѹ£¨Ïßµçѹ£©¡£¡£¡£¡£
ʾÀý£º¶î¶¨µçѹ0.6/1kVÌåÏÖÏàµçѹ600V¡¢Ïßµçѹ1000V¡£¡£¡£¡£
2. Æ¥ÅäϵͳµçѹÓëµçÀ¶µçѹ
ÔÔò£ºµçÀ¶µçѹÐè¡Ýϵͳ±ê³Æµçѹ£¬£¬£¬£¬£¬£¬²¢ÁôÓÐÇå¾²Ô£¶È¡£¡£¡£¡£
ϵͳ±ê³Æµçѹ10kV ¡ú Ñ¡8.7/15kV»ò12/20kVµçÀ£¨Ë¼Á¿¹ýµçѹÒòËØ£©¡£¡£¡£¡£
°¸Àý£ºÄ³·çµç³¡10kVϵͳѡÓÃ8.7/15kV XLPEµçÀ£¬£¬£¬£¬£¬£¬Í¨¹ý1.7U?£¨14.8kV£©¹¤ÆµÄÍѹÊÔÑé¡£¡£¡£¡£
ϵͳ±ê³Æµçѹ220V£¨µ¥Ïࣩ»ò380V£¨ÈýÏࣩ¡ú Ñ¡0.6/1kVµçÀ¡£¡£¡£¡£
°¸Àý£ºÄ³¹¤³§380V¶¯Á¦ÅäµçÏäÑ¡ÓÃ0.6/1kVƽÐеçÀ£¬£¬£¬£¬£¬£¬ÔËÐÐ5ÄêÎÞ¾øÔµ¹ÊÕÏ¡£¡£¡£¡£
µÍѹϵͳ£¨¡Ü1kV£©£º
ÖÐѹϵͳ£¨6kV~35kV£©£º
¶þ¡¢Ë¼Á¿×°ÖÃÇéÐζԵçѹƷ¼¶µÄÓ°Ïì
1. º£°ÎÐÞÕý
ÎÊÌ⣺¸ßº£°ÎµØÇø¿ÕÆøÃܶȽµµÍ£¬£¬£¬£¬£¬£¬¾øÔµÇ¿¶ÈϽµ£¬£¬£¬£¬£¬£¬ÐèÌá¸ßµçÀ¶µçѹ¡£¡£¡£¡£
ÐÞÕýÒªÁ죺
º£°ÎÿÉý¸ß1000m£¬£¬£¬£¬£¬£¬µçÀ¶µçѹÐèÌá¸ß8%~10%¡£¡£¡£¡£
ʾÀý£ºº£°Î3000mµØÇøÊ¹ÓÃ10kVϵͳ£¬£¬£¬£¬£¬£¬µçÀ¶µçѹÐè¡Ý10kV¡Á1.24£¨ÐÞÕýϵÊý£©=12.4kV£¬£¬£¬£¬£¬£¬¿ÉÑ¡12/20kVµçÀ¡£¡£¡£¡£
°¸Àý£ºÄ³Î÷²Ø¹â·üµçÕ¾ÒòδÐÞÕýº£°Î£¬£¬£¬£¬£¬£¬Ñ¡ÓÃ8.7/15kVµçÀÂÔÚ3500mº£°ÎÔËÐУ¬£¬£¬£¬£¬£¬1Äêºó±¬·¢¾øÔµ»÷´©¡£¡£¡£¡£
2. ζÈÐÞÕý
ÎÊÌ⣺¸ßÎÂÇéÐλá¼ÓËÙ¾øÔµÀÏ»¯£¬£¬£¬£¬£¬£¬½µµÍÄÍѹÄÜÁ¦¡£¡£¡£¡£
ÐÞÕýÒªÁ죺
µçÀºã¾ÃÊÂÇéζÈÿÉý¸ß10¡æ£¬£¬£¬£¬£¬£¬¾øÔµÊÙÃüËõ¶ÌÒ»°ë£¬£¬£¬£¬£¬£¬Ðèͨ¹ýÖÊÁÏÉý¼¶»òÌá¸ßµçѹƷ¼¶Åâ³¥¡£¡£¡£¡£
ʾÀý£ºÔÚ120¡æÇéÐÎÖÐÔËÐеĵçÀ£¬£¬£¬£¬£¬£¬ÈôԶµçѹΪ0.6/1kV£¬£¬£¬£¬£¬£¬Ðè¸ÄÓÃÄÍÈÈXLPE£¨125¡æ£©»òÌá¸ßÖÁ1.8/3kVÆ·¼¶¡£¡£¡£¡£
°¸Àý£ºÄ³Á¶¸Ö³§µçÀ¾®Î¶ȴï100¡æ£¬£¬£¬£¬£¬£¬Ô0.6/1kV PVCµçÀÂÔËÐÐ2Äêºó»÷´©£¬£¬£¬£¬£¬£¬¸ÄÓÃ1.8/3kVÄÍÈÈXLPEµçÀºóÎȹÌÔËÐÐ5Äê¡£¡£¡£¡£
Èý¡¢Æ¾Ö¤¸ºÔØÌØÕ÷Ñ¡ÔñµçѹƷ¼¶
1. ¸ºÔØÀàÐÍÓëµçѹ½µ
³¤¾àÀë´óµçÁ÷¸ºÔØ£¨Èçµç»ú¡¢µçº¸»ú£©£º
¸ºÔع¦ÂÊ100kW£¬£¬£¬£¬£¬£¬¹¦ÂÊÒòÊý0.8£¬£¬£¬£¬£¬£¬¾àÀë500m¡£¡£¡£¡£
Ñ¡0.6/1kVµçÀÂʱ£ºµçÁ÷I=100kW/(¡Ì3¡Á0.38kV¡Á0.8)¡Ö189A£¬£¬£¬£¬£¬£¬µçѹ½µ¦¤U=189A¡Á0.19¦¸/km¡Á0.5km¡Ö18V£¨4.7%£¾5%ÔÊÐíÖµ£©¡£¡£¡£¡£
¸ÄÓÃ1.8/3kVµçÀÂʱ£ºµçÁ÷I=100kW/(¡Ì3¡Á1.8kV¡Á0.8)¡Ö40A£¬£¬£¬£¬£¬£¬µçѹ½µ¦¤U=40A¡Á0.06¦¸/km¡Á0.5km¡Ö1.2V£¨0.4%£¼5%ÔÊÐíÖµ£©¡£¡£¡£¡£
µçѹ½µ¿ÉÄܵ¼ÖÂ×°±¸Æô¶¯ÄÑÌâ»òÔËÐÐÒì³££¬£¬£¬£¬£¬£¬Ðèͨ¹ýÌá¸ßµçÀ¶µçѹïÔ̵çÁ÷£¨I=P/U£©£¬£¬£¬£¬£¬£¬´Ó¶ø½µµÍµçѹ½µ£¨¦¤U=IR£©¡£¡£¡£¡£
ÅÌËãʾÀý£º
°¸Àý£ºÄ³¿óɽÔËËÍ´øµç»úÒòµçѹ½µ³¬±êƵÈÔÍ£»£»£»£»ú£¬£¬£¬£¬£¬£¬¸ÄÓÃ1.8/3kVµçÀºóÆô¶¯ÀÖ³ÉÂÊÌáÉýÖÁ99%¡£¡£¡£¡£
2. г²¨Óë¹ýµçѹ
·ÇÏßÐÔ¸ºÔØ£¨Èç±äƵÆ÷¡¢ÖÐÆµÂ¯£©»á±¬·¢Ð³²¨£¬£¬£¬£¬£¬£¬µ¼ÖÂϵͳµçѹ»û±äÂÊ£¨THD£©Éý¸ß£¬£¬£¬£¬£¬£¬ÐèÌá¸ßµçÀ¶µçѹÒÔÔâÊܹýµçѹ¡£¡£¡£¡£
±ê×¼ÒªÇó£ºIEC 61000-3-2»®¶¨£¬£¬£¬£¬£¬£¬THD£¾5%ʱµçÀÂÐè°´1.2U?Ñ¡ÐÍ¡£¡£¡£¡£
°¸Àý£ºÄ³Æû³µ¹¤³§º¸½Ó³µ¼äTHD´ï8%£¬£¬£¬£¬£¬£¬Ô0.6/1kVµçÀÂÆµÈÔ»÷´©£¬£¬£¬£¬£¬£¬¸ÄÓÃ1.2/2.4kVµçÀºó¹ÊÕÏÂʹéÁã¡£¡£¡£¡£
ËÄ¡¢Çå¾²Ô£¶ÈÓë±ê×¼¹æ·¶
1. Ç徲ϵÊýÑ¡Ôñ
µÍѹϵͳ£ºÇ徲ϵÊý¡Ý1.5£¨¼´µçÀ¶µçѹ¡Ý1.5¡Áϵͳ±ê³Æµçѹ£©¡£¡£¡£¡£
ʾÀý£º220Vϵͳѡ0.6/1kVµçÀ£¨1000V/220V¡Ö4.5£¾1.5£©¡£¡£¡£¡£
ÖÐѹϵͳ£ºÇ徲ϵÊý¡Ý1.7£¨Ë¼Á¿²Ù×÷¹ýµçѹ¡¢À×»÷¹ýµçѹ£©¡£¡£¡£¡£
ʾÀý£º10kVϵͳѡ12/20kVµçÀ£¨20kV/10kV=2£¾1.7£©¡£¡£¡£¡£
2. ×ñÕÕ¹ú¼Ê/º£ÄÚ±ê×¼
Öйú±ê×¼£¨GB/T£©£º
GB/T 12706¡¶¶î¶¨µçѹ1kV£¨Um=1.2kV£©µ½35kV£¨Um=40.5kV£©¼·°ü¾øÔµµçÁ¦µçÀ¼°¸½¼þ¡·¡£¡£¡£¡£
GB/T 5023¡¶¶î¶¨µçѹ450/750V¼°ÒÔϾÛÂÈÒÒÏ©¾øÔµµçÀ¡·¡£¡£¡£¡£
¹ú¼Ê±ê×¼£¨IEC£©£º
IEC 60502¡¶Power cables with extruded insulation and their accessories for rated voltages from 1kV to 30kV¡·¡£¡£¡£¡£
IEC 60227¡¶Polyvinyl chloride insulated cables of rated voltages up to and including 450/750V¡·¡£¡£¡£¡£
°¸Àý£ºÄ³³ö¿ÚÅ·ÖÞ×°±¸ÐèÖª×ãIEC 60502±ê×¼£¬£¬£¬£¬£¬£¬Ô°´GB/T 12706Éè¼ÆµÄ8.7/15kVµçÀÂÐèÖØÐÂÑéÖ¤¾Ö²¿·Åµç£¨¡Ü5pC/1.5U?£©ºÍ¹¥»÷ÄÍѹ£¨95kV/10´Î£©ÐÔÄÜ¡£¡£¡£¡£
Îå¡¢ÐÐÒµ°¸ÀýÓë×î¼Ñʵ¼ù
1. ÐÂÄÜÔ´Æû³µ³äµç×®µçÀÂ
ÐèÇó£ºÄ͸ßѹ£¨750V/1000V£©¡¢¿¹µç´Å×ÌÈÅ¡¢ÈáÈÍÐԺᣡ£¡£¡£
¼Æ»®£º
Ñ¡1.5/3kV XLPE¾øÔµ£¨Ç徲ϵÊý1.5¡Á1000V=1500V£¬£¬£¬£¬£¬£¬ÏÖʵ¶î¶¨µçѹ3000V£©¡£¡£¡£¡£
½ÓÄɶÆÎýÍË¿±àÖ¯ÆÁÕÏ£¨ÁýÕÖÂÊ¡Ý85%£©+TPU»¤Ì×£¨ÄÍÓÍ¡¢ÄÍÍäÇú£©¡£¡£¡£¡£
Ч¹û£ºÍ¨¹ýGB/T 33594-2017ÈÏÖ¤£¬£¬£¬£¬£¬£¬Ö§³Ö350kW³¬³ä£¬£¬£¬£¬£¬£¬ÊÙÃü´ï10Äê¡£¡£¡£¡£
2. º£ÓÅÊÆµç±äÁ÷Æ÷µçÀÂ
ÐèÇó£ºÄ͸ßѹ£¨35kV£©¡¢ÄÍÑÎÎí¡¢¿¹Õñ¶¯¡£¡£¡£¡£
¼Æ»®£º
Ñ¡26/35kV XLPE¾øÔµ£¨Ç徲ϵÊý1.7¡Á35kV¡Ö60kV£¬£¬£¬£¬£¬£¬ÏÖʵ¶î¶¨µçѹ35kV£©¡£¡£¡£¡£
½ÓÄÉǦÌ×+²¨ÎÆÂÁ»¤Ì×£¨·ÀË®¡¢·À»úеËðÉË£©+ÒÒ±ûÏð½ºÍ⻤Ì×£¨ÄÍÑÎÎí£©¡£¡£¡£¡£
Ч¹û£ºÍ¨¹ýIEC 60840-2020²âÊÔ£¬£¬£¬£¬£¬£¬ÔÚº£ÉÏÔËÐÐ5ÄêÎÞ¾øÔµÀÏ»¯¡£¡£¡£¡£
3. Êý¾ÝÖÐÐĸßËÙÊý¾ÝµçÀÂ
ÐèÇ󣺵ÍÏûºÄ£¨10GHzË¥¼õ¡Ü0.2dB/m£©¡¢¸ßÈáÈÍÐÔ£¨ÍäÇú°ë¾¶¡Ü3D£©¡£¡£¡£¡£
¼Æ»®£º
Ñ¡·¢ÅÝXLPE¾øÔµ£¨½éµç³£Êý½µÖÁ1.8£©+ÂÁ²ÆÁÕÏ£¨ÒÖÖÆµç´Å×ÌÈÅ£©¡£¡£¡£¡£
¶î¶¨µçѹ°´ÐźŵçѹѡÐÍ£¨Èç²î·ÖÐźŵçѹ¡À1V¡úÑ¡300VÆ·¼¶£©¡£¡£¡£¡£
Ч¹û£ºÖ§³Ö40GbpsÊý¾Ý´«Ê䣬£¬£¬£¬£¬£¬ÎóÂëÂÊ¡Ü10???£¬£¬£¬£¬£¬£¬Öª×ãANSI/TIA-568-C.2±ê×¼¡£¡£¡£¡£
×ܽá
Ñ¡ÔñƽÐеçÀ¶µçѹƷ¼¶Ðè×ñÕÕÒÔϰ취£º
È·¶¨ÏµÍ³µçѹ£ºÃ÷È·±ê³Æµçѹ£¨Èç380V¡¢10kV£©¼°¹ýµçѹˮƽ¡£¡£¡£¡£
ÆÀ¹ÀÇéÐÎÒòËØ£ºÐÞÕýº£°Î¡¢Î¶ȶԾøÔµÇ¿¶ÈµÄÓ°Ï죨È纣°Î3000mÐèÌá¸ß24%¶î¶¨µçѹ£©¡£¡£¡£¡£
ÆÊÎö¸ºÔØÌØÕ÷£ºÆ¾Ö¤µçÁ÷¡¢µçѹ½µ¡¢Ð³²¨Ñ¡ÔñºÏÊʵçѹƷ¼¶£¨È糤¾àÀë¸ºÔØÐèÌá¸ßµçѹïÔ̵çÁ÷£©¡£¡£¡£¡£
Ô¤ÁôÇå¾²Ô£¶È£ºµÍѹϵͳÇ徲ϵÊý¡Ý1.5£¬£¬£¬£¬£¬£¬ÖÐѹϵͳ¡Ý1.7¡£¡£¡£¡£
Çкϱê×¼¹æ·¶£ºÓÅÏÈÑ¡ÓÃͨ¹ýGB/T¡¢IECÈÏÖ¤µÄµçÀÂÐͺ𣡣¡£¡£
ʾÀý£ºÄ³¹¤³§Ð½¨10kVÅäµçϵͳ£¬£¬£¬£¬£¬£¬º£°Î2000m£¬£¬£¬£¬£¬£¬¸ºÔØÎª500kWµç»ú£¨¾àÀë800m£©£¬£¬£¬£¬£¬£¬Ð³²¨THD=6%¡£¡£¡£¡£
°ì·¨£º
ϵͳ±ê³Æµçѹ10kV ¡ú »ù´¡¶î¶¨µçѹѡ12/20kV£¨Ç徲ϵÊý1.7£©¡£¡£¡£¡£
º£°Î2000mÐÞÕý£º20kV¡Á1.08£¨ÐÞÕýϵÊý£©=21.6kV ¡ú ÐèÑ¡¸ü¸ßµçѹƷ¼¶£¨Èç18/30kV£©¡£¡£¡£¡£
г²¨ÐÞÕý£ºTHD£¾5% ¡ú ¶î¶¨µçѹ°´1.2U?ÅÌË㣨1.2¡Á18kV=21.6kV£©£¬£¬£¬£¬£¬£¬Ó뺣°ÎÐÞÕýÒ»Ö¡£¡£¡£¡£
×îÖÕÑ¡ÐÍ£º18/30kV XLPE¾øÔµÆ½ÐеçÀ£¬£¬£¬£¬£¬£¬Í¨¹ýIEC 60840¹¥»÷ÄÍѹ£¨105kV/10´Î£©²âÊÔ¡£¡£¡£¡£
ͨ¹ý¿ÆÑ§Ñ¡ÐÍ£¬£¬£¬£¬£¬£¬¿É½µµÍµçÀ¹ÊÕÏÂÊ£¨Èç´Ó3%½µÖÁ0.1%£©£¬£¬£¬£¬£¬£¬ÑÓÉìʹÓÃÊÙÃü£¨Èç´Ó15ÄêÑÓÉìÖÁ30Ä꣩£¬£¬£¬£¬£¬£¬Í¬Ê±Öª×ã¹ú¼ÊÈÏÖ¤ÒªÇ󣬣¬£¬£¬£¬£¬ÌáÉýϵͳ¿É¿¿ÐÔ¡£¡£¡£¡£
Ïà¹ØÄÚÈÝ
- ͽÊÏßÊÇ·ñÐèÒª¿¹Ñõ»¯´¦Öóͷ££¿£¿£¿£¿£¿£¿³£Óÿ¹Ñõ»¯¼ÁÓÐÄÄЩ£¿£¿£¿£¿£¿£¿
- ÏðÌ×±âµçÀÂÏà¹ØµÄ¹ú¼Ê±ê×¼ÓÐÄÄЩ£¿£¿£¿£¿£¿£¿
- ÏðÌ×±âµçÀµÄÄÍѹ²âÊÔµçѹºÍʱ¼äµÄÑ¡ÔñÒÀ¾ÝÊÇʲô£¿£¿£¿£¿£¿£¿
- ÏðÌ×±âµçÀµÄÇéÐÎ˳ӦÐÔ²âÊÔÌõ¼þºÍ²âÊÔÖÜÆÚÔõÑùÈ·¶¨£¿£¿£¿£¿£¿£¿
- µ¼ÌåµÄ¿¹ÀÇ¿¶ÈÓëÏðÌ×±âµçÀÂÔÚ×°ÖÃÀú³ÌÖеĿ¹ÀÉìÄÜÁ¦ÓкιØÏµ£¿£¿£¿£¿£¿£¿
- µ¼ÌåµÄÑÓÉìÂʶԱâµçÀµÄÍäÇúÐÔÄܺÍÄÍÆ£ÀÍÐÔÄÜÓкÎ×÷Ó㬣¬£¬£¬£¬£¬ÔõÑùÆÀ¹À£¿£¿£¿£¿£¿£¿
- ÔõÑùͨ¹ýµ¼ÌåÔ¤´¦Öóͷ£¹¤ÒÕÌá¸ßÏðÌ×±âµçÀµĿ¹Ñõ»¯ºÍ¿¹ÇÖÊ´ÄÜÁ¦£¿£¿£¿£¿£¿£¿
- ²î±ðµÄ½ÊºÏÆ«Ïò¶Ô±âµçÀÂÈáÈÍÐÔºÍµçÆøÐÔÄÜÓкÎÓ°Ï죿£¿£¿£¿£¿£¿
- ÏðÌ×ÖÊÁϵÄÌå»ýµç×èÂÊÔõÑùÓ°Ïì±âµçÀµľøÔµµç×èÖ¸±ê£¿£¿£¿£¿£¿£¿
- ¹èÏ𽺱âµçÀµÄÈÏÖ¤±ê¼ÇÓÐÄÄЩ£¬£¬£¬£¬£¬£¬¸÷´ú±íʲô¼ÄÒ壿£¿£¿£¿£¿£¿