6x300mw火力发电设计.docVIP

摘 要 由发电、变电、输电、配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的一次能源通 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。75%。本文是对配有6台300MW汽轮发电机的大型火电厂电气部分的初步设计，主要完成了电气主接线的设计。包括电气主接线的形式的比较、选择；主变压器、启动/备用变压器和高压厂用/备用变压器容量计算、台数和型号的选择；短路电流计算和高压电气设备的选择与校验; 并作了变压器继电保护。 关键词 发电厂 变压器 电力系统 继电保护 电气设备 Abstract： From the generation, transformation, transmission, distribution and consumption, and other sectors of energy production and consumption system. It is the function of the natural world through the energy generation power plants into electric energy, and then lose. substation systems and power distribution systems will be supplied to the load center. Electrical wiring is the main power plant, electrical substation designed first and foremost part of the power system is also constitute an important link. The use of power has infiltrated the social, economic, in all areas of life, and in the power structure of Chinas thermal power equipment capacity of the total installed capacity of 75%. This article is equipped with 6*300MW turbo-generator of large-scale thermal power plants a part of the preliminary design of the main completed the main electrical wiring design.Connection to determine the overall power system and power plants, substations themselves the reliability of the operation, flexibility and economy are closely related. And the electrical equipment selection, distribution equipment configuration, relay control and the elaboration of a larger impact. Keywords : Power Plant Transformer Power System Relay Protection Electrical Equipment 目 录 1 引言 1 2 发电厂电气主接线设计 2 2.1 主接线的设计原则 2 2.2 主接线的方案比较及确定 3 2.3 发电机与变压器的选择 5 3 发电厂厂用电接线设计 7 3.1 厂用电接线设计总的要求 7 3.2 厂用电电压等级的确定 7 3.3 厂用电源及其引接 7 3.4 厂用变压器的选择 8 3.5 高压厂用电接线设计 10 4 短路电流计算 12 4.1 概述 12 4.2 元件电抗计算 12 5 导体与电气设备选择 26 5.1 导体的选择 26 5.2 220kV系统设备的选择 29 5.3 电流互感器的选择 31 5.4 电压互感器的选择 32 5.5 避雷器的选择 33 6 继电保护和自动装置 34 6.1 继电保护配置 34 7 高压配电装置设计 38 7.1 高压配电装置设计的一般原则 38 7.2 高压配电装置设计的要求 38 7.3 配电装置 38 参考文献 40 致