杜靖宇,陈华杰,李少波
DU Jingyu,CHEN Huajie,LI Shaobo

• 1:宁波市环境保护科学研究设计院
• 2:浙江国华浙能发电有限公司

摘要(Abstract)：

某600 MW发电机组升级改造为630 MW后,原循泵出力无法满足机组改造后的循环冷却水量要求,故采用变极调速方式对循泵进行双速改造,利用绕组接线方式的切换完成高速量形和低速三角形接线的转换,并提出了一种可实现高低速运行时保护电流回路自动适应的方法,只需切换保护定值区即可满足循泵高低速时均投入差动保护的要求,计算得出循泵改造后节能效果明显。
With the upgrade of a generating unit from 600 MW to 630 MW, the output of the former circulating water pump can no longer meet the requirement of circulating cooling water after the unit transformation. Therefore, two-speed retrofit of circulating water pump is conducted through pole conversion and speed adjustment. Via switching of winding connection modes, high-speed shape measurement and low-speed triangle connection can be exchanged; besides, a self-adaption method of protection current circuit in low-speed operation is presented, through which differential protection can be switched to simultaneously in low-speed operation of circulating pump just by protection settings switching. It is concluded by calculation that the retrofitted circulating water pump can be significantly energy-saving.

关键词(KeyWords)： 双速切换;差动保护;节能
two-speed switching;differential protection;energy saving

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 杜靖宇,陈华杰,李少波
DU Jingyu,CHEN Huajie,LI Shaobo

DOI: 10.19585/j.zjdl.2016.09.012

参考文献(References)：

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• [2]DL/T 5153-2014火力发电厂厂用电设计技术规程[S].北京:中国计划出版社,2014.
• [3]方昌勇,陈更.双速改造在发电厂循泵电机节能中的应用[J].浙江电力,2011,30(12):74-77.