35KV供电设计毕业设计论文

目录

1 绪论 (1)

1.1灵北基本情况简介 (1)

1.2灵北煤矿原始情况 (1)

1.2.1 地面用电负荷统计 (1)

1.2.2 井下采区设计原始资料 (2)

2 灵北35KV煤矿供电设计方案及论证 (5)

2.1灵北煤矿总体设计方案 (5)

2.2方案的可行性论证 (5)

2.2.1 技术方面论证 (5)

2.2.2 经济方面论证 (6)

3 矿井地面变电所设计 (7)

3.1地面用电负荷计算 (7)

3.2地面变电所位置选择 (10)

3.3地面变电所的主接线 (11)

3.3.1 35kV侧主接线 (11)

3.3.2 10kV侧主接线 (12)

4 井下中央变电所及供电设计 (15)

4.1井下电力负荷计算 (15)

4.1.1 井下负荷的计算方法 (15)

4.2.2 井下负荷的计算 (16)

4.3井下中央变电所位置选择原则 (17)

4.4井下中央变电所主接线 (18)

5 短路电流计算 (20)

5.1短路电流计算选择 (20)

5.2计算短路电流的目的 (20)

5.3三相短路电流的计算方法 (21)

5.3.1 电源为无限容量时的短路电流计算 (21)

5.3.2 电源为有限容量时的短路电流计算 (22)

5.4短路电流计算 (23)

6 设备选择 (30)

6.1一般的选择方法 (30)

6.2短路动、热稳定性校验原则 (31)

6.3变压器选择 (31)

6.4地面设备选择举例 (31)

6.4.1 35kV设备的选择 (32)

6.4.2 10kV设备的选择 (34)

6.5井下设备选择 (35)

6.5.1 电缆选择计算 (35)

6.5.2 井下开关选择 (37)

7 保护装置 (38)

7.1继电保护装置 (38)

7.2防雷保护及接地 (39)

7.2.1 变电所防雷装置 (39)

7.2.2 地面变电所保护接地网 (40)

7.2.3 井下保护接地网 (40)

8 结论 (43)

致谢 (44)

参考文献 (45)

摘要

本设计是在煤矿实习的基础上完成的。通过对灵北煤矿的实地考察，结合该矿现有生产水平和未来发展前景，在原有供电系统的基础上根据煤炭生产行业的有关规定进一步规范和完善。

灵北煤矿系240万吨大煤矿，供电系统设计内容包括：地面变电所设计、井下供电设计、短路电流计算、地面及井下高低压设备选择、保护装置、地面及井下接地等。本设计主供电系统由来自不同地方的两路35kV线路供电，经主变压器变为10kV，由单母分段的接线方式分别向地面和井下供电。根据煤矿供电系统特点，本设计系统主线路均以最大运行方式进行整定，并以此对线路及其设备进行选择。

灵北煤矿35kV供电系统包括井上供电系统和井下供电系统两个部分。为保证供电的安全、可靠，又考虑灵北煤矿50年的服务期限，从经济和技术两个方面对本矿进行整体设计，以达到满足对灵北煤矿设计的合理性。

关键词：灵北煤矿 35KV 供电设备选择

The design is based on the completion of the internship in the coal mine. Da Liao Gap of Ningwu Coal Mine through field visits, in conjunction with the existing level of production plant and the prospects for future development in the power supply system on the basis of the relevant provisions of the coal production industry further standardize and improve.

Da Liao Gap of Ningwu Coal Mine is 30 million tons and coal mines, power system design include ：ground substations design, mine supply design, short circuit current calculations, ground and underground high-low voltage equipment selection, protection devices, ground and underground grounded. From the design of the power supply system in different parts of the two roads 35kV power line, the main 10kV transformers into the single-parent separately to the above ground and underground wiring electricity. According to the characteristics of coal supply system, the design of the main lines are the largest operation of the system means the set of lines and equipment and to choose.

Ningwu coal 35kV electricity supply system includes two parts of the Underground power supply system and above ground power supply system. Considering the three years’ service of Ningwu mine, in order to ensure the security of electricity supply, reliable, the paper designs the engineering system which is reasonable for Lingbei mine from the economic and technical aspects.

Key words: Lingbei Coal Mine;35kV; Power Supply; electrical equipment selection