某冶炼厂小电源接入系统的保护设计与优化

Protection Design and Optimization of Small Power Source Access System in a Smelter

某大型冶炼厂多路不同电压等级的小电源接入供电系统,在电力系统的保护设计上存在问题,导致出现在发生单边线路故障全厂停电时,备自投装置未能自动投切,10 kV余热发电未能及时跳闸的。介绍了该厂针对上述问题做出的相应的优化设计。实践证明,优化设计保证了该厂电网的安全稳定运行。

For small power source access system with multiple different voltage levels in a large-scale smelter,there are some problems in the protection design of power system,when the power failure occurs in the whole smelter in case of single-side line fault,the standby automatic switching device fails to switch-on automatically,and the 10 kV waste heat power generation fails to trip in time.This paper introduces the corresponding optimization design for the above problems.The practice shows that the optimal design ensures safe and stable operation of the power grid.