关于电磁环网弱开环方式的探讨

Discussion on weak open-loop mode of electromagnetic loop

随着电网结构的逐步增强,为了降低日益增大的220kV电网短路电流水平,必须逐步采取开环运行方式。但在500kV和220kV局部电网结构尚不完善的情况下,解环运行往往难以实现。在此过渡时期可以采取弱开环方式,以河南三门峡电网为例,通过分析论证,得出在电网结构不完善的过渡时期,采用弱开环方式将优于完全开环方式的结论,这可为电网安全可靠运行提供一种新的方式。

Along with electrical network structure＇s unceasing enhancement, the short-circuit current level of 220kV electrical network enhances quickly, to further lower the short-circuit current level, open-loop operation mode must be carded out gradually. When the structure of 500kV and 220kV power grid is still not perfect, open-loop operation is often difficult to achieve. This paper proposes a weak open-loop mode, takes Sanmenxia power grid in Henan as an example, and explains this kinds of open-loop form. Conclusion is that the use of weak open-loop way is better then the completely open-loop mode in the transitional period, and it can provide a new mode to safe and reliable operation of power grids.