1、 毕 业 设 计 任 务 书 设计题目：设计题目： # 6水电厂电气部分初步设计水电厂电气部分初步设计 专 业： 电气工程及其自动化 班级学号： 姓 名： 指导教师： 设计期限： 2010 年 03 月 22 日开始 2010 年 06 月 07 日结束 院、系： 电力学院 2010 年 03 月 22 日 1 摘 要 本设计为水电厂电气一次部分设计，它是将本专业所学知识进行一次综合运用的过 程。从理论上来说它涉及到电力系统课程的多方面内容。根据具体设计而言，其主要内 容为:通过本设计原始资料来选择发电厂发电机、主变压器型号；根据电压等级、出线回 数、负荷情况设计本电厂的电气主接线，选出两个比
2、较满意的电气主接线方案，然后进 行技术分析以及经济综合比较，确定一个较佳方案；根据主接线画出等值电路图，合理 选择短路点，对等值电路图进行网络化简，按三相短路情况进行短路电流计算；依据正 常工作状态选择所需的母线与电气设备，并在三相短路情况下，按短路状态对所选母线 与电气设备进行校验。本设计所选电气设备包括：断路器、隔离开关、母线、电压互感 器以及避雷器；然后对本发电厂进行合理的高压配电装置以及防雷保护设计。本设计的 重点研究问题是电气主接线图的选择、短路电流的计算以及各电气设备的选择与校验。 关键词：关键词：水电厂；电气主接线；短路电流；电气设备 2 Abstract This is the
3、 electrical once part design of a hydroelectric power plant. It is a process to put the knowledge we studied in our major into use comprehensively. Theoritically speaking it involves to various content of electrical power system curriculum. According to the concrete design, its primary coverage is:
4、choose the main transformer model and main generator model of the power plant, through this firsthand information of the design. According to the voltage class, the number of line that connect to the bus, the load situation design this substation the electrical main wiring, selects two quite satisfi
5、ed electrical main wiring plan, then carries on the technical analysis as well as the economical synthesis comparison, determines a better plan; Draw the equivalent circuit diagram according to the main wiring, chooses the short-circuit dot reasonably, simplify the equivalent circuit diagram , carri
6、es on the short-circuit current calculation according to the three-phase short circuit situation; Choose the bus bar and electrical equipment needed according to the normal work condition, and verify them in three-phase short circuit situation.To chooses according to the short circuit condition. The electrical equipment selected in this design including: Circuit breakers, isolator, bus bar, voltage transformer, and lighting arrester; Then carrie on the reasonable hig
