短路计算实例.pdf

该【短路计算实例 】是由【小屁孩】上传分享，文档一共【11】页，该文档可以免费在线阅读，需要了解更多关于【短路计算实例 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。:..短路计算书如下图,各级水电站的系统接线图:说明:(1)、忽略系统归算至35KV侧阻抗(2)、忽略二级电站至一级电站线路阻抗1×16000KVA(3)、忽略夹水电站至三级电站的线路阻抗U%=18(4)、忽略五级站至茅庵变的线路阻抗Ⅰ-ⅡUⅠ-Ⅲ%=(5)、将所有电源点看作是无穷大电源U%=(6)、,Ⅱ-ⅢLGJ-95LGJ-120LGJ-=?/kmx?=?/km23=%=74000KVA4000KVA8000KVA6300KVAUk1%=7Uk2%=7Uk3%=%=×1600KW+1×1250KW3×500KW3×1450KW2×500KW2×2150KW2×1600KW系统等值网络化简:--1-:..等值电路各元件参数归算过程:1、发电机S100X?X???B???5G1dS(2?)?X???B??????X???B???????X???B???(2?)?X???B???5G5dS(2?)、变压器U(%)S7100X?K1?B???(%)S7100X?K2?B???(%)?K3?B???(%)?K4?B???(%)S7100X?K1?B????(X?X?X)?Ba2高-中高-低中-低SN1100??(??)??-2-:..1SX?(X?X?X)?Bb2高-中中-低高-低SN1100??(??)???(X?X?X)?Bc2高-低中-低高-中SN1100??(??)??-、线路:S100X?x?l?B?????x?l?B?????x?l?B????(一)、d处短路时【】1X?X?X?X?X?XsfabL2L1T1???????X?51fG1X?X?X?X?????X?X?X?X3fG3T3L1T1??????X?X?X?X?X?X4fG4T4L3L2L1T1????????X?X?X?X?X5fG5T5L2L1T1?5?????:-3-:..I???1?1????1?1????1?1????1?1????1?1????1?1?:S100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????:I?I?I?I?I?I?Is12345???????(二)、d2处短路时【】X?X?X?X?XsfabL2T3?????-4-:..X?X?X?X?X1fG1T1L1T3?5?????X?X?X?X2fG2T2L1T3??????X??X?X?X?X?X4fG4T4L3L2T3???????X?X?X?X5fG5T5L2T3?5????:I???1?1????1?1????1?1????1?1????1?1????1?1?:S100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????37N-5-:..S100I?I???B????37NS100I?I???B????:I?I?I?I?I?I?Is12345???????(三)、d3处短路时【】X?X?X?X?XsfabL3T4??????X?X?X?X?X?X1fG1T1L1L2L3T4?5???????X?X?X?X?X?X2fG2T2L1L2L3T4????????X?X?X?X?X3fG3T3L2L3T4???????X??X?X?X?X5fG5T5L3T4?5????:I???1?1????1?1????1?1????1?1?-6-:..I???1?1????1?1?:S100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????:I?I?I?I?I?I?Is12345???????(四)、d4处短路时【即一级电站35KV母线上短路时】X?X?X?X?XsfabL2L1??????X?X?5???X?X????X?X?X?????X?X?X?X?X4fG4T4L3L2L1??????-7-:..X?X?X?X?X5fG5T5L2L1?5????:I???1?1????1?1????1?1????1?1????1?1????1?1?:S100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????37N故一级电站35KV母线上最大短路电流为:I?I?I?I?I?I?Is12345???????-8-:..(五)、d5处短路时【即三级电站35KV母线上短路时】X?X?X?X?????X?X?X?5????X?X?X?????X?X????X?X?X?X4fG4T4L3L2??????X?X?X?5???:I???1?1????1?1????1?1????1?1????1?1????1?1?:S100I?I???B????37NS100I?I???B????37NS100I?I???B????37N-9-:..S100I?I???B????37NS100I?I???B????37NS100I?I???B????37N故三级电站35KV母线上最大短路电流为:I?I?I?I?I?I?Is12345???????(六)、d6处短路时【即四级电站35KV母线上短路时】X?X?X?X?????X?X?X?X?X1fG1T1L1L2L3?5??????X?X?X?X?X2fG2T2L1L2L3???????X?X?X?X3fG3T3L2L3??????X?X????X?X?X?5???:I???1?1????1?1????1?1?-10-:..I???1?1????1?1????1?1?:S100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????37NS100I?I???B????37N故四级电站35KV母线上最大短路电流为:I?I?I?I?I?I?Is12345???????::-11-