文档介绍：目录摘要……………………………………………………………………………i绪论……………………………………………………………………………1第一章概述………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………4第二章系统中各元件的主要参数计算…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………7第三章中性点接地的选择……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………9第四章短路电流的计算……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………24第五章继电保护整定……………………………………………………………………………………………………………………………………………………………………………………………………………36第六章零序电流保护的整定计算……………………………………………(Ⅰ段)的整定计算………………………………(Ⅱ段)的整定计算………………………………………(Ⅲ段)的整定计算……………………………………………………………………………………38结束语………………………………………………………………………40谢辞…………………………………………………………………………41参考文献……………………………………………………………………42【摘要】在电力系统的设计和运行中,都必须考虑到可能发生的故障和不正常的运行情况,因为它们会破坏用户的供电和电气设备的正常工作。从电力系统的实际运行情况看,这些故障多数是由短路引起的,因此除了对电力系统的短路故障有一较深刻的认识外,还必须熟练掌握电力系统的短路电流计算,选择