750 kV电网形成初期对青海电网影响

随着青海750kV电网的建成投运,青海将出现750/330kV电磁环网。研究了青海750kV网架初步形成后,750/330kV电磁环网运行方式对系统安全稳定性的影响。静态安全分析和稳定计算结果表明,在未形成坚强的750kV网架结构前,合环运行比解环方式更有利于提高甘青电网输送能力。

Studies on Influences of the 750 kV Grid at Its Initial Stage on Qinghai Power Grid

With completion and putting into operation of the 750 kV Qinghai power grid, the original 330 kV grid will be electro-magnetically coupled with the newly built 750 kV power grid. This paper studies the influences of operation modes of the electro-magnetically coupled 750/330 kV power grid on the system security and stability after Qinghai 750 kV main grid is preliminarily formed at the end of 2009. The results of both the static security and stability analyses show that before a strong 750 kV network is built up, the operation mode of electro-magnetically coupled power grid, i.e., the close-loop operation mode, serves to enhance the transmission capacity and stability of Gansu-Qinghai power grid more efficiently than the open-loop operation mode.