220kv变电站一次系统设计

论文编号:JD071    字数:23631,页数:66

摘  要

本文以220KV地区变电站设计为例，论述了电力系统工程中变电站部分电气设计（一次部分）的全过程。通过对变电站的主接线设计，站用电接线设计，短路电流计算，电气设备动、热稳定校验，主要电气设备型号及参数的确定，运行方式分析，防雷及过电压保护装置的设计，电气总平面及配电装置断面设计和无功补偿方案设计，较为详细地完成了电力系统中变电站设计。
限于毕业设计的具体要求和设计时间的限制，本毕业设计只对变电站电气一次部分做了较为详细的理论设计，而对其电气二次部分并没有涉及，这有待于在今后的学习和工作中进行研究。

关键词：变电站   短路电流   动稳定   热稳定   过电压保护装置  无功补偿

ABSTRACT

The statement about the 220kv transformer area substation design, discussed some electrical transformer stations design (one part) in power systems engineering of the entire process. Through the main transformer stations wiring design, stations wiring design stations, short circuit current calculations, check electrical equipment moving and thermal stability, set the main electrical equipment models and the parameters, the operating mode, design over-voltage protection  and mine devices , design general electric graphic  and distribution devices flood, and without power compensation. Lastly,completed substation design in power system.  
Limited to the specific design requirements and design time of constraints, The design only is a part of the electrical transformer stations, and its second part did not involve, which research it in future study and work.
KEY WORDS:  Substation,  Short circuit currents , Moving stability，Thermal stability，Over-voltage protection devices，Without power compensation

目    录
摘  要 ..................................................................I
ABSTRACT ...............................................................II
第1章引言 ..............................................................1
第2章 .主接线设计 .......................................................2
·2.1电气主接线的一般要求 ...............................................2
·2.2主接线选择的主要原则 ...............................................3
·2.3主接线方案设计......................................................3
·2.3.1 方案拟定及技术比较 ..............................................3
·2.3.2 方案的经济性比较 ................................................5
·2.3.4主变的选择 .......................................................9
·2. 3. 4. 1选择原则 ....................................................9
·2.3.4.2容量计算 ......................................................10
本章小结.......................................................... .....11
第3章 站用电接线及设备用电源接线方案....................................12
·3.1 所用电源数量及容量................................................12
·3.2所用电源引接方式...................................................12
·3.3 所用变压器低压侧接线..............................................12
·3.4所站用电接线 ......................................................13
·3.5备用电源 ..........................................................13
本章小结.......................................................... .....14
第4章短路计算 .........................................................15
·4.1短路故障产生的原因 ................................................15
·4.2 短路故障的危害 ...................................................16
·4.3 短路电流计算的目的 ...............................................16
·4.4短路电流计算的内容 ................................................17
·4.5 短路电流计算方法 .................................................17
·4.6三相短路电流周期分量起始值的计算 ..................................18
·4.6.1短路电流计算的基准值.............................................18
·4.6.2网络模型 ........................................................18
·4.6.3三相短路电流周期分量起始值的计算步骤 ............................18
本章小结 ...............................................................22
第5章  设备的选择及动、热稳定校验.......................................23
·5.1.按正常工作条件选择电气设备 .......................................23
·5.2.按短路状态校验....................................................24
·5.3 断路器、隔离开关的选择原则....................................... 25
·5.4.互感器的选择......................................................28
·5.4.1电流互感器的选择................................................ 28
·5.4.2 电压互感器的选择 ...............................................30
·5.4.3 熔断器的选择 ...................................................30
·5.4.4所设备如下表 ....................................................31
·5.5.裸导体的选择 .....................................................33
·5.5.1  一般要求.......................................................33
·5.5.2导体的选择 ......................................................34
·5.5.3 截面的选择..................................................... 34
·5.6.运行方式分析 .....................................................37
本章小结............................................................... 38
第6章配电装置 .........................................................39
·6.1配电装置的基本要求.................................................39
·6.2配电装置的类型及特点 ..............................................39
·6.3配电装置的设计原则.................................................40
·6.4 配电装置设计的基本步骤........................................... 41
·6.5配电装置的选用 ....................................................41
·6.6电气总平面布置 ....................................................43
本章小结 ...............................................................43
第7章 防雷及过电压保护装置设计..........................................44
·7.1避雷针............................................................ 44
·7.2避雷器 ............................................................45
·7.3防雷接地.......................................................... 46
·7.4变电所的防雷保护 ..................................................47
·7.5变电所的进线段保护.................................................48
·7.6 接地装置..........................................................48
本章小结 ...............................................................48
第8章无功补偿 .........................................................49
·8.1 提高功率因数的意义 ...............................................49
·8.2 补偿装置的确定....................................................49

·8.3功补偿容量计算.................................................... 50
·8.3.1补偿的最大容性无功量计算........................................ 50
·8.3.2变压器补偿的最大的容性无功量.................................... 51
本章小结 ...............................................................53
第5章结束语........................................................... 54
致谢 ..................................................................55
参考文献 ...............................................................56
附录................................................................... 57