毕业设计---发电厂电气一次设计.docx

摘要发电厂是电力系统的重要组成部分，也直接影响整个电力系统的安全与运行。在发电厂中，一次接线和二次接线都是其电气部分的重要组成部分。本设计是电气工程及其自动化专业学生毕业前的一次综合设计，它是将本专业所学知识进行的一次系统的回顾和综合的利用。设计中将主要从理论上在电气主接线设计，短路电流计算，电气设备的选择，配电装置的布局，防雷设计，发电机、变压器和母线的继电保护等方面做详尽的论述，同时，在保证设计可靠性的前提下，还要兼顾经济性和灵活性，通过计算论证该火电厂实际设计的合理性与经济性。在计算和论证的过程中，结合新编电气工程手册规范，采用CAD软件绘制电气图，进一步完善了设计。关键词：电气主接线; 短路电流；配电装置；电气设备选择AbstractPower plants is an important part of power system, and also affect the safety of the whole power system with operation. In power plant, a wiring and secondary wiring is the important part of electrical part.This design is the electrical engineering and automation of professional students before graduation design, it is a comprehensive professional knowledge learnt this a systematic review and comprehensive utilization. Design mainly from theory will in the main electrical wiring design, short-circuit current calculation, electrical equipment choice, power distribution equipment layout, lightning protection design, generator, transformer and busbar protection etc, and a detailed discussion with the current operation coal-fired power plants, meanwhile, in comparison to ensure that the design reliability premise, even give attention to two or morethings economy and flexibility, through calculation demonstrates that the practical rationality of the design of power with economy. In the process of calculation and argumentation, combined with the new electric engineering manuals, using CAD software standard drawing a lot of electrical diagrams, further improve the design.Keywords：the main electrical connection;Short-circuit current; Distribution device;Electrical equipment selection目录摘要IAbstractII1 绪论41.1 课题背景41.1.1 课题研究的目的和意义41.2 国内外研究现状51.2.1 电力系统的国内外发展状况51.2.2 火电厂设计研究的国内外发展状况51.3 课题的主要研究工作61.3.1 设计内容62原始资料72.1 原始资料分析73发电厂电气主接线设计83.1 发电厂电气一次设计的内容83.2 发电厂电气主接线的基本原则93.3 电气主接线设计需要考虑的问题93.4 发电厂电气主接线设计的基本要求103.4.1 具有一定的灵活性103.4.2 可靠性103.4.3 经济性103.4.4 扩建的可能性113.5 发电厂主接线的基本接线形式113.5.1 单母线形式113.5.2 双母线形式153.5.3 其他接线形式163.6 方案的设计、论证和选择18