摘要本设计根据该钢铁厂的相关资料和实际情况，对该厂的总降压变电所和高压供电系统进行设计。本设计首先根据工厂提供的资料对工厂的负荷用需要系数法进行了计算，根据负荷情况对变压器的容量和台数进行了选择。该厂电源由某变电所以110kV双回路架空线引出，本设计选择在该厂设立总降压变电所先将电压降为厂区供电电压10kV，再由各车间变电所降为负荷所需电压。为保证供电系统的可靠性，总降压变电所采用单母线分段式接线方式，厂区供电系统采用放射式接线方式。通过对系统的短路电流的计算，本设计对各变电所的主要电气设备、电缆和母线进行了选择和校验，对一次侧主要设备进行了继电保护整定，同时对避雷和接地装置进行了选择。67349

毕业论文关键字：110KV变电站、短路电流、设备选择与校验、继电保护、防雷与接地 

毕业设计说明书（论文）外文摘要

Title    Total ferroalloy plant 110KV substation design buck                     

Abstract

The design according to the steel mills of the relevant information and the actual situation of the plant's total step-down substation and high-voltage power supply system design. The design is first based on information provided by the factory with the needs of the plant load factor method were calculated according to the load capacity of the transformer and the situation on the number of units were selected. Power plant by a substation 110kV double circuit overhead line to lead the overall design choices in the plant set up step-down substation supply voltage of the first voltage drop of the plant 10kV, and then reduced load required by the plant substation voltage. To ensure the reliability of the power supply system, the total step-down substation single busbar type wiring, power supply system using radial factory wiring. Through the system short-circuit current calculation, the design of each major substation electrical equipment, cables and busbars a selection and verification, on a side of the main equipment for the relay setting, while the lightning protection and grounding devices a choice.

Keywords  : 110KV substation, short-circuit current, equipment selection and calibration, relay protection, lightning protection and grounding

目录

1  引言 1

1.1供电设计的一般原则 1

1.2设计的具体内容 1

2  工厂的电力负荷及其计算 2

2.1  车间计算负荷的确定 2

2.3  工厂计算负荷的确定 2

2.4  无功功率补偿及其计算 4

3  降压变电所及变压器的选择 5

3.1  总降压变电所所址的选择 5

3.2  降压变电所形式的选择 6

3.3  厂区供电电压的选择 6

3.4  总降压变电所变压器台数和容量的选择 6

3.5  车间变电所变压器选择 7

4  总降压变电所主接线方案及供电线路的设计 7

4.1  总降压变电所的任务和类型