本科毕业论文35KV无人值守变电站设计可编辑.docVIP

本科毕业论文：35KV无人值守变电站设计 and for power system reliability and stability. The substation is connected to the intermediate links of the power system to bring together the power, lift voltage and distribution of electric energy. The safe operation of the substation power system is critical. In this paper, the design of the step-down substation 35KV/10KV unattended. The 35kV substation integrated automation system for unattended, its design should be subject to the overall design of the power grid dispatch automation, configuration, features include layout of the equipment shall meet the power grid safety, quality, economy of operation and information layered transmission, sharing of resources principle. Therefore, the design we will use this as the design guidelines to expand the design work. The entire design process including the choice of design and selection of the main wiring of the electrical substation, short-circuit current calculation, the main transformer and electrical equipment. Which the choice of the electrical equipment including: circuit breakers, isolating switches, current transformers, voltage transformers, bus conductors, surge arresters, high voltage fuses, etcThe simple design of integrated automation equipment unattended substation Keywords: step-down substations,electrical part of the design,unattended,integrated automationII 河南城建学院本科毕业设计(论文)目录 目录 摘 要 I Abstract II 1 绪 论 1 1.1 原始资料1 1.2 课题的目的和意义 1 1.2.1 提高了运行可靠 2 1.2.2 加快了事故处理的速度 2 1.2.3 提高了劳动生产率. 2 1.2.4 降低了建设成本 2 1.3 国35KV总降压变电所设计. 6 2.1 设计指导思想. 6 2.2 主接线的选择. 7 2.2.1 电气主接线的含义和满足的要求. 7 2.2.2 本设计所选择的主接线方案及其选择理由7 2.3 主变压器的选择8 2.3.1 主变压器台数的选择8 2.3.2 主变容量的确定 9 2.3.3 主变压器接线形式的选择 10 2.3.4 结论 11 2.4 所用变压器的选择和所用电的设计 11 2.5 短路电流的计算. 12 2.5.1 概述 12 2.5.2 短路计算的目的13 2.5.3 短路电流实用计算的基本假设13 2.5.4 短路电流实用计算步骤14 2.6 主要电气设备的选择及校验 17 2.6.1 高压电气选择的一般原则 18 2.6.2 按正常工作条件选择导体和电器 18 2.6.3 按短路情况校验19 2.7 高压开关柜中断路器及隔离开关选择及校验. 20 2.7.1 额定电流的计算20 2.7.2 高压断路器及隔离开关的选择结果及校验. 20 2.8 高压开关柜电压互感器、电流互感器及高压熔断器的选择. 25 2.8.1 电