10k V变电所及低压配电系统设计探讨

Discussion on Design of 10kV Substation and Low Voltage Distribution System

变电所是电力系统的重要组成部分,其中10kV/0.4/0.23kV降压变电所及低压配电系统分布最广、数量最多,与我们日常生产和生活密切相关。某企业10kV变电所主要由高压输入线路、高压开关及检测设备、变压器、低压开关及检测设备、低压输出线路等组成。本文主要设计探讨了变电所的负荷计算、变压器及无功补偿的选择、主接线的设计、电缆的选择、短路电流的计算、开关设备的选择、系统的保护和控制等。

The substation is an important part of the power system, among which 10kV/0.4/0.23kV step-down substation and low-voltage distribution system are the most widely distributed and the largest number, which are closely related to our daily production and life. The 10kV substation of an enterprise is mainly composed of highvoltage input line, high-voltage switch and detection equipment, transformer, low-voltage switch and detection equipment, low-voltage output line, etc. This paper mainly discusses the load calculation of the substation, the selection of transformers and reactive power compensation, the design of main wiring, the selection of cables, the calculation of short-circuit current, the selection of switchgear, the protection and control of the system, etc.