×MW火力发电厂电气一次部分设计.doc

4×200MW火力发电厂电气一次部分设计 Design of 4x200MW Thermal?Power?Plant Primary System 学生学号 学生姓名： 专业班级：电气0902 指导教师： 职 称：讲师 起止日期：2013.3.4～2013.6.17 摘 要 由发电、配电、输电、变电和用电等环节组成的电能生产与消费系统。它的功能是将自然界通过发电动力装置转化成电能，再经输、变电系统及配电系统将电能供应到各负荷中心。Abstract By the power generation, transformation, transmission and distribution of electricity and energy components, and other aspects of production and consumption systems. It is the function of the natural world through the power of primary energy into electrical energy power plant, then lost, transforming the system and distribution system will supply power to the load centers. Thermal power plant is a establishment about generate electricity and power transform. The electrical equipments in thermal power plant have two parts of Primary Equipment and Secondary Equipment. We always take producing, transporting and distributing equipment into Primary Equipment. The high voltage electrical circuit which denotes the connection of Primary Equipment is Primary circuit. Primary circuit is the Principle part in Thermal power plant of electrical design. It is the hinge of guaranteeing the reliability of power supply, economic，power quality, and infecting the investment of electrical party. In this paper, we completed the program design and economic analysis of the main electrical wiring, major electrical equipment options, including the main transformer capacity calculation . Calculated on the basis of short-circuit current from power plants , power distribution device selection program design . Key Words：power plant；the main electrical connection；electrical equipment 目 录 摘 要 I Abstract II 第1章 绪 论 1 1.1 电力工业的发展概况 1 1.2 发电厂预设规模 1 1.3 发电厂接入系统的原则 2 第2章 电气主接线设计 3 2.1 概述 3 2.1.1 电气主接线设计的基本要求 3 2.1.2 220kV电压等级常用接线方式 3 2.2 拟定可行的主接线方案 4 2.2.1 方案一 4 2.2.2 方案二 4 2.2.3 方案的比较与选定 5 2.3 变压器的选型 5 第3章 火电厂厂用电接线的选择 6 3.1 概述 6 3.1.1 方案的比较与选定 6 3.1.2 厂用电的电压等级 6 3.1.3 厂用电系统中性点接地方