文档介绍：发电厂是电力系统的一个重要组成部分,它的主要作用是生产和分配电能,其电气接线包括一次接线和二次接线两大部分。本次设计的是(4×100MW)凝汽式发电厂电气一次部分设计。设计的主要内容有:
①发电厂电气一次部分的接线设计。
1)主接线形式的确定,主要有主变压器的选择、负荷出线导体的选择和各电压等级接线形式的确定;
2)确定发电厂厂用电接线系统,包括厂用工作变压器和备用变压器的选择;
②计算各母线和发电机端口的三相短路电流,列出短路电流计算结果表。
③电气设备选择和配电装置设计。
1)按正常工作电流选择断路器、隔离开关、互感器等电气设备,并确定高压开关柜的型号;
2)按三相短路电流校验电气设备;
3)列出电气设备选择结果表。
④绘制发电厂电气一次接线图和典型间隔断面图。
关键词:发电厂,变电站,电气接线,电气设备
ABSTRACT
The power plants are ponents for the power system, and their main role is to produce and distribute electrical energy. Their electrical connection includes two parts that are main connection and secondary connection. In the paper, the electrical primary part of condensing power plants(4×100MW)is designed. The main contents of the design are as follows:
The design of the main electrical connection for the power plants.
Determination of the main electrical connection form, including the selection of the main transformers and the conductors of outgoing loads ,and the determination of the electrical connection form for each voltage level;
Determination of the electrical connection system in their own power plant, including the selection of the working transformer and standby transformer.
The three-phase short circuit currents on each bus and generator outlet need to be calculated, listing the results of the short-circuit currents in a table.
The choice of electrical equipment and the design of distribution equipment.
Select the electric equipment including circuit breakers、disconnectors、instrument transformers and so on according to the normal operating currents, then determine the type of high voltage switchgear;
Check the electrical equipment according to the three-phase short circuit currents;
List the results of electrical equipment in table.
④Draw the main electrical connection diagram for power plant and the cross section diagram.
Key words:power plant, substation, electrical connection, electrical equipment
毕业设计(论文)原创性声明和使用授权说明
原创性声明
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