摘要随着经济科技水平的不断进步,电力网的原有容量已经无法满足现代生产生活的需求,故而对于地区电网的改建设计成为了不可忽视的一个环节。改建就是设计出一个满足地区供电负荷的要求并保证在正常运行和轻微故障下仍能恢复供电的经济可靠的电网。61705
本设计主要是对于地区电网发电厂电气部分的设计。首先通过地区电网的结构选型,在充分满足设计要求的情况通过经济比较来获得最终发电厂电气的主接线方案。然后再是通过短路电流的计算来选择电气主接线中的主要设备。除此之外还对于整个区域网做了防雷设计和继电保护设计。
毕业论文关键字 电力网 设计 主接线 短路计算
毕业设计说明书(论文)外文摘要
Title The Design of the Electrical Part of Power Grid and Power Plant
Abstract With the continuous progress of economy and science and technology, the capacity of the power network has been unable to meet the needs of modern living. reconstruction design of the regional power network has become an important part. Reconstruction is to design an economic and reliable power grid to meet the requirements of regional power load and guarantee that can still restore power in normal operation and fault.
This design is mainly for the design of the electrical part of power grid and power plant. Firstly, selecting the eventually main wiring plan of power plant ,with the comparison of structure of regional power grid, which fully meet the design requirements of economic.Then through the short circuit current calculation to select the main electrical equipment in the main wiring.Finally,I do the lightning protection design and protective relaying design over the whole grid.
Keywords Power network Design Main wiring Short circuit calculation
目 录
1 绪论 1
1.1 选题背景及意义 1
1.2 课题研究内容 1
2 火电厂和水电厂发电机型号 2
3 区域电网选线 3
3.1 区域电网方案一 4
3.2 区域电网方案二 13
3.3 方案技术经济比较 20
4 发电机变压器的选择 20
4.1 主变压器的型号选择 20
4.2 变压器容量和台数的确定 21
4.3 变压器其他参数的确定 22
4.4 变压器型号参数计算 22
5 发电厂电气主接线 24
5.1 火电厂电气主接线的确定 24
5.2 水电厂电气主接线的确定 25
6 短路电流计算 25
6.1 短路电流计算的主要目的 25
6.2 各个元件参数标幺值的计算 25
6.3 高压处(K1)短路电流计算 27
6.4 中压处(K2)短路电流计算 30
6.5 低压处(K3)短路电流计算 33
7 发电厂主要电气设备选择