某发电厂一次系统毕业设计论文.doc

河南理工大学万方科技学院毕业设计 PAGE PAGE i 1 摘 要 电能是现代工业生产的主要能源和动力。电能既易于由其它形式的能量转换而来，又易于转换为其它形式的能量以供应用；电能的输送和分配既简单经济，又便于控制、调节和测量，有利于实现生产过程自动化。随着电能在生活中的广泛应用，对电力系统的稳定、经济、可靠要求就有所增加，作为生产电能的发电厂一次系统的设计就显得尤其的重要。本文设计了某4×220MW火力发电厂的一次系统，是从我国电力系统整体出发，根据系统设计的主要任务，发电厂和变电所电能的生产、变压、输送、分配和使用的安全、优质、可靠以及经济运行的要求，提出一次系统的具体设计方案。主要设计内容为主接线形式的确定、主变压器的选择；进行了短路电流计算，对主要电气设备进行了选择和校验，包括母线、断路器、隔离开关、互感器、避雷器等。通过毕业设计巩固了所学专业知识，使自己对发电厂一次系统有了整体的认识。 关键词： 一次系统；主接线；短路计算；设备选择 Abstract Electricity is modern industrial production of the main sources of energy and motive force. Electricity is easily by other forms of energy conversion, and easy to convert to other forms of energy supply, Electric power transmission and distribution is simple and easy control, economic regulation and measurement, conducive to the realization of automatic production process. With the wide application of power in the life of the power system, stable and reliable, economic increase, as for the production of electric power system design appears especially important. This paper designs a 4 x 220MW coal-fired power plants in China, is a system of power system, according to the main task of system design, the production of electric power plant and substation, pressure, transmission, distribution and use of safety, high quality, reliable and economical operation of the system, a design scheme. Main design content determination of form, mainly wiring the choice of main transformer, The short-circuit current calculation of main electrical equipment, the choice and calibration, including generatrix, circuit breakers, isolating switch, transformer, arresters, etc. Through the graduation design professional knowledge, and strengthened himself in a power system. Key words: primary system; main connection line; short-circuit calculation; equipment choice 目 录 TOC \o "1-3" \h \z \u 前 言 1 1 概述 2 1.1 原始资料 2 1.2 本课题的研究任务 3 2 电气主接线 4 2.1 电气主接线 4 2.1.1 主接线的设计依据 4 2.1.2 设计要求 5 2.2 电气主接线方式的比较 6 2.2.1 拟采用的主接线方式的比较 6 2.2.