220kV枢纽变电站电气一次部分设计计算书.doc

1、220kV枢纽变电站电气一次部分设计摘要：变电站对电力的生产和分配起到了关键作用，是电力系统中变换电压、接受和分配电能，控制功率的流向和调整电压的电力设施，作为电能输送和控制的枢纽，设计是否合理，不仅直接影响了基建投资、运行费用和有色金属的消耗量，也会反映在供电的可靠性和安全生产方面，它和企业的经济效益、设备人身安全密切相关。本设计主要介绍了220kV变电站电气部分的设计。首先对原始资料进行分析，设计主接线形式，选择主变压器的台数及容量，综合比较各种接线形式的特点、优缺点，根据实际情况选择两种较其他方案可靠地主接线形式。再对这两种方案进行具体的经济、技术比较，然后选择其中一种最合理的方案。对此

2、方案进行短路电流计算，为该设计中需要的高压电器设备的选择、整定、校验等方面做准备；继而进行主要电气设备的选择与校验，最后进行配电装置设计，防雷保护设计。关键字：变电站 变压器 电气设备 配电装置Electric preliminary design is primarily designed for 220kV substation hubAbstract substation on the production and distribution of electricity plays a key role in converting the power system voltage, re

3、ceiving and distributing power, control power flow and adjust the voltage of the power facilities, power transmission and control as a hub, the design is reasonable, not only directly affect the investment, operating costs and capital consumption of non-ferrous metals, will be reflected in the relia

4、bility and safety of power production, its economic benefits and business, it is closely related to personal safety equipment.This design introduces the 220kV substation electrical part of the design. First, the raw data were analyzed, the main connection form design, select the number of units and

5、the capacity of the main transformer, a comprehensive comparison of the characteristics of various wire forms, advantages and disadvantages, choose two reliable forms of landlord wiring than other programs in accordance with the actual situation. Then these two programs specific economic, technical

6、comparison, then choose one of the most reasonable option. This program short-circuit current calculation in preparation for the design of select high-voltage electrical equipment, tuning, calibration, etc; then select and check the main electrical equipment, the final distribution equipment design,

7、 lightning protection design.Keywords: converting station, transformer, electrical equipment, distribution equipment目 录摘要IAbstractII引言11 电气主接线的选择1 1.1 主接线概述1 1.2 电气主接线设计的基本要求2 1.3 主接线接线方式概述2 1.4 主接线方案的初步比较2 1.4.1 220kV侧主接线选择2 1.4.2 110kV侧主接线选择2 1.4.3 10kV侧主接线选择3 1.5 主接线方案的选择32 主变压器的选择5 2.1 主变压器选择的原则

8、5 2.2 变压器台数的选择5 2.3 变压器容量的选择5 2.4 变压器绕组数和连接组别的选择6 2.5 主变压器的确定6 2.6 电力变压器的布置63 短路电流计算6 3.1 短路电流计算目的6 3.2 短路电流计算时采用的假设与原则6 3.3 各侧短路电流计算7 3.3.1 220kV侧短路电流计算7 3.3.2 110kV侧短路电流计算8 3.3.3 10kV侧短路电流计算84 电气设备的选择与校验11 4.1 一般规定11 4.2 断路器和隔离开关的选择12 4.2.1 220kV主变侧和出线断路器、隔离开关的选择12 4.2.2 110kV侧断路器和隔离开关的选择与校验14 4.2

9、.3 10kV侧电抗器、断路器和隔离开关的选择与校验16 4.3 互感器的选择19 4.3.1 电流互感器的选择与校验20 4.3.2 电压互感器的选择24 4.4 母线和引下线的选择25 4.4.1 引下线的选择25 4.4.2 母线的选择与校验27 4.5 支持绝缘子与10KV侧穿墙套管的选择28 4.5.1 穿墙套管的选择28 4.5.2 支持绝缘子选择28 4.6 10kV侧无功功率补偿计算285 所用电的设计29 5.1 变电所的所用电系统设计和设备选择29 5.2 该变电站所用电源及容量的确定29 5.3 所用电源引接线的方式296 电气总平面图的设计和配电装置的选择29 6.1

10、配电装置的选择29 6.1.1 配电装置的概述29 6.1.2 配电装置的类型及应用30 6.1.3 配电装置的确定30 6.2 电气总平面布置30 6.2.1 电气总平面布置的要求30 6.2.2 电气总平面布置的确定307 防雷装置保护31 7.1 防雷保护的必要性31 7.2 变电站防雷保护内容31 7.3 避雷针的配置31 7.3.1 避雷针的配置原则31 7.3.2 避雷针配置的确定32 7.3.3 避雷针定位及针距32 7.4 避雷器的选择与校验32 7.4.1 阀式避雷器应按下列条件选择32 7.4.2 各电压等级避雷器的选择与校验338 结论35参考文献36致谢37 Conte

11、ntsAbstractIIintroduction11 Main electrical wiring selection1 1.1 the main wiring overview1 1.2 the basic requirement of the main electrical wiring design2 1.3 summary of the main wiring connection mode2 1.4 the main wiring scheme of preliminary comparison2 1.4.1 220 kv side main wiring options2 1.4

12、.2 110 kv side main wiring options2 1.4.3 10 kv side main wiring options3 1.5 the main wiring scheme32 The choice of the main transformer5 2.1 Transformer selection principle5 2.2 Select the number of transformer stations5 2.3 Selection of Transformer Capacity6 2.4 Select the number of windings of t

13、he transformer and connect groups6 2.5 Determine the main transformer6 2.6Arrangement of power transformers73 Short circuit calculation7 3.1 Short-circuit current calculation purposes7 3.2 Short-circuit current assumptions and principles used in the calculations7 3.3 Each side of the short-circuit c

14、urrent calculation8 3.3.1 220kV side short-circuit current calculation8 3.3.2 110kV side short-circuit current calculation9 3.3.3 10kV side short-circuit current calculation114 Select the check of electrical equipment11 4.1 General provisions11 4.2 Circuit breakers and disconnectors selection12 4.2.

15、1 220kV main transformer side and outgoing circuit breakers, disconnectors choice14 4.2.2 110kV circuit breaker and isolation switch selection and validation16 4.2.3 10kV side reactors, circuit breakers and disconnectors selection and validation19 4.3 Transformer selection19 4.3.1 Current transformer sel