某发电厂厂用电切换装置的改造

文章介绍了广东某发电厂原有的厂用电电源切换方式,分析了其缺陷,进而对引进的厂用电快切装置的三种事故、异常快切方式的原理进行了分析。通过对快切装置的切换事故进行分析,重新设计6KV厂用段与6KV脱硫段备用电源切换配合方式,并对快切装置的定值进行重新整定,最终实现了快切装置在该厂6KV厂用IA段的良好应用,保证了6KV厂用IA段和6KV脱硫Ⅰ段电源的安全、可靠切换,为电厂合理、有效运用厂用电快切装置提供了参考。

Reformation ofAuxiliary Power Transfer Device in Some Power Plant

Firstly,an analysis is made of some plant＇ s original auxiliary power transfer system as well as its problems.Secondly,a new fast transfer device is introduced with its main failure automatic transfer theories.During the application,some problems occurred with the new device,the author analyzed the causes of them and worked out a new cooperating style and changed the parameters of the fast transfer device accordingly.At last,two real experimentations were made to test the system;the results showed that the new cooperating style and the changed parameters made the fast transfer device＇ s operation safe and reliable.