2 系统负荷计算及各种电气设备选择

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6

2．1 系统的负荷计算

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6

2.2 主变的选择

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7

2.2.1 确定主变的额定容量

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7

3.主接线形式的选择

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8

3.1 变电所主接线的设计原则

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8

3.2 选择主接线的形式

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8

4.短路电流计算

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9

4.1 短路计算

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9

5.电气设备的选择和及校验

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11

5.1 母线的选择

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11

5.2 断路器的选择与校验......................................................16
5.3 隔离开关的选择与校验.....................................................18
6.所电变的选择

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21

6.1 10kV 所用变的选择

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21

6.2 35kV 所用变的选择

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21

参考文献

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21

附录

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前言

电力工业为现代化生产提供主要动力。电力科学的发展和广泛应用，对我国工农业的迅

速发展及人民生活水平的提高起到了巨大的作用和深远的影响。

通过对理论的学习理解以及实际的工作，我对变电所的原理和设备有了初步的解了。为

了增加自己的动手能力，为以后的工作打下良好的基础，我选择了

110kV/35kV/10kV 系

统设计作为自己的课题设计。

随着大规模农网发行事业的深入实施，一个优质、安全、可靠、宽松的供电环境已实步形

成，我们国家的电力事业逐渐和国际接轨。为了适应我国电力事业的发展及将所学的知识运

用到实际生产中去，我进行了变电所设计。

本次设计的是

110kV 的县级常规变电所，以提出地区供电质量，减少供电损失，满足

该地区的负荷增长需要为目的，本着经济的原则进行设计，由于本地人口集中，以及各种