矿井变电所主变压器保护论文.doc

本科毕业设计说明书 矿井变电所主变压器保护设计矿井变电所主变压器保护设计变压器在系统中起转换枢纽作用，可以保障的安全正常运转矿井变电所主变压器保护矿井变电所主变压器保护矿井变电所主变压器保护:通过采集各种信号，由软件程序进行处理，并判断是否报警，处理后的数据用于显示和存储查询。 本次毕业设计旨在完成煤矿110KV变电所主变压器保护TRANSFORMER SUBSTATION OF MINE PROTECTION DESIGN ABSTRACT Transformer in the power conversion system, a pivotal role to play, mine protection of main transformer power supply system is to ensure that an important tool for coal mine safety supply, underground mines to protect the safety and equipment for normal operation. This paper describes the 110KV substation main transformer protection of mine protection, pointed out the main transformer substation 110KV mine the need for protection. Then introduced the principle of protection, combined with the actual situation, a set of application programming techniques to design PLC mine 110KV substation main transformer protection program. The set of comprehensive back protection device is: by collecting a variety of signals, processed by the software program, and determine whether the alarm, the processed data for display and storage of information. The graduation project in order to complete mine 110KV substation main transformer protection. The paper has been focused on PLC hardware system design in the relay protection device, analyze and explain, which can be achieved coupled with software designed to control part of the protection of the device, the hardware implementation is part of the device. Another chart shows the composition of the hardware. KEYWORDS: the main transformer, electrical equipment, short-circuit current, relay protection, plc programming 目录 摘要 I ABSTRACT II 1 绪论 1 1.1 研究意义 1 1.2 继电保护原理和要求 2 1.3 继电保护的历史回顾和展望 3 1.4 继电保护的现状和我的一些看法 4 1.5 设计内容 5 2 变电站负荷计算和无功补偿的计算 6 2.1 负荷计算的内容和意义 6 2.2 负荷统计 6 2.2.1 负荷等级的规定 7 2.2.2 负荷计算 7 2.3 无功补偿 9 2.3.1 电容器（柜）台数的确定 9 2.3.2 补偿后10KV侧的实际功率因数 10 3 主接线的设计 11 3.1 主接线设计原则 11 3.2 主接线的方案与分析 11 3.2.1 主变压器高压侧接线 11 3.2.2 主变压器低压侧的接线 12 4 主变压器的选择 13 4.1 主变压器选择的原则 13 4.2 主变压器台数和容量的选择 13 4.3 变压器的选型结果 13 4.4 全矿总负荷计