摘要某塑料制品厂全厂总配电所及配电系统设计是对工厂供电具有针对性的设计。本设计对工厂供电方式、主要设备的选择、保护装置的配置及防雷接地系统进行了详细的叙述，内容主要包括全厂的负荷计算、高压侧和低压侧的短路计算、设备选择及校验、主要设备继电保护设计、配电装置设计、防雷和接地设计等。本设计考虑了所有用电设备并对这些负荷进行了计算。通过计算出的有功、无功和视在功率选择变压器的大小和相应主要设备的技术参数，再根据用户对电压的要求，计算电容器补偿功率和补偿装置的容量，从而得出所需电容器的大小与个数，最终确定总配变电所的主接线图。64276

毕业论文关键词  供配电系统   负荷计算   短路电流   设备选择   继电保护

毕业设计说明书（论文）外文摘要

Title      The design of power distribution system for     Plastics Products Factory  

Abstract The design of power distribution system for Plastics Products Factory is concern in the power supply of the factory. The design describes the factory power supply pattern, selection and disposition of protector of major equipments, which includes the short circuit calculations of high-handed side and low pressure side, the equipment selection and test, and the designs of the relay protection of the major equipments, the continue electric protection equipments, and the guards against that thunder and ground connection. This design has considered all electricity equipments in the factory and calculated the loads of the equipments. The transformer and the technique parameters of relative equipment were selected by mains of the calculations of active, non-active and visual-power. According to the demand of user to voltage, the magnitude of the capacitor was obtained by calculating the capacity of condenser compensation of the device. In the end, the main wiring diagram of transformer substation system is always joined in marriage in the decision. 

Keywords  Distribution   Load Calculation   Short Circuit Current   Equipment Selection   Relay Protection

1  引言 1

1．1  工厂供电的意义 1

1．2  工厂供电的设计原则 1

1．3  设计内容 2

1．4  设计原始资料 2

2  负荷计算、无功补偿及变压器选择 4

2．1  电力负荷计算 4

2．2  无功功率补偿 6

2．3  配电所位置和变压器选择 8

3  总配电所主接线方案的设计 12

3．1  电气主接线的设计原则和要求 12

3．2  电气主接线的基本方式 12

3．3  电气主接线的选择 13

3．4  电气主接线图 14

4  短路电流计算 15

4．1  短路等效电路图 15

4．2  短路计算 16

5  主要电气设备的选择与校验 20

5．1  一次设备的选择与校验 20

5．2  架空线、母线的选择