某轧钢厂降压变电所的电气设计

Electrical Design of a Step-Down Substation in a Rolling Mill

摘要: 某轧钢厂供配电系统在实际运行中存在系统可靠性、电气设备、防雷设计等方面问题，易造成投资浪费，甚至会导致短路电流超标、接地故障、雷击损害等电气故障，引发事故事件的发生，究其根本原因，还是在设计阶段基础不扎实，设计有缺陷。根据国家相关标准规范，结合相关方面的研究，为某轧钢厂建立降压变电所，对其变压器、主接线方式、电气设备、导体和电缆及防雷保护和接地装置等进行设计，对整个过程进行了整理总结，绘制了整个该厂的变电所的主接线电路图，能够实现工厂稳定、可靠、安全、经济运行。

Abstract: There are issues with system reliability, electrical equipment, and lightning protection design in the actual operation of the power supply and distribution system of a certain steel rolling plant, which can easily lead to investment waste and even lead to electrical faults such as short-circuit current exceeding standards, grounding faults, and lightning damage, leading to the occurrence of accidents. The root cause of the accident is still in the design stage, with weak foundation and design defects. According to relevant national standards and regulations, combined with relevant re-search, a step-down substation was established for a steel rolling plant. The transformer, main wiring mode, electrical equipment, conductors and cables, lightning protection and grounding devices were designed, and the entire process was summarized. The main wiring circuit diagram of the entire substation in the plant was drawn, which can achieve stable, reliable, safe, and economic operation of the factory.