关于功率外送型电网孤网高频后解决措施分析

摘要:

为了解决外送型电网大功率外送时联络线故障跳闸造成孤网高频的隐患，提高电网的频率稳定性，首先阐述 了孤网高频问题及危害，然后针对性地提出了4 种措施: 切机、快速调节汽门、快速切辅机( runback，RB) 和快速切负荷( fast cut back，FCB) ，对比分析每种措施的效果及对电网和发电厂的影响。并通过仿真分析，验证了各种措施的效果和差异性，最后得出在不同运行条件下各措施的利弊及适用范围，为今后外送型电网的安全稳定运行以及经济性提供了参考。

Abstract:

In order to solve the hidden troubles of high － frequency in isolated power grid caused by the tripping of the link line when outputting high power and to improve the stability of grid frequency，the high － frequency problems of isolated grid are described firstly as well as its harm，and then aiming at the problems，four measures are proposed，that is，generator triping，fast adjusting port，runback( RB) and fast cut back( FCB) ． The effects of each measure and their influences on power grid and power plant are compared and analyzed． Through simulation analysis，the effects and differences of each measure are validated． The merits and demerits as well as the applicable scope of each measure are obtained in different operating condition，which provides a reference for the safe and stable operation and the economy of power delivery grid in the future．