抽水蓄能电厂主变压器差动保护CT极性判别方法的商榷
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摘要
对于施工前期不能完成上库蓄水的抽水蓄能电厂来说,完成主变压器差动保护CT极性判别是一个技术难题。根据电厂自身条件、利用有限资源完成主变压器差动CT极性判别,对主变压器安全稳定运行,对更好地完成机组首机首次启动调试均有较大帮助。本文列举了几种主变压器差动保护CT极性判别的方法,并对这几种方法的使用特点进行比较、分析,得出一些结论。为今后新建、扩建抽水蓄能电厂做好主变压器差动保护CT极性判别工作提供参考。
For the pumped storage power plant which cannot get water in upper dam at the early stage of construction,it is a technical difficulty to complete the CT polarity judgment of main transformer differential protection. The main transformer differential protection polarity judgment can be completed according to present conditions and limit resources of the power plant. It is helpful to the main transformer safe & reliable operation as well as first unit initial startup commissioning. The article gives examples of CT polarity judgment methods for main transformer differential protection and gets conclusions through comparison and analysis of these methods. This provide conferences for new built and extended pumped storage power plants on CT polarity judgment of main transformer different protection.
For the pumped storage power plant which cannot get water in upper dam at the early stage of construction,it is a technical difficulty to complete the CT polarity judgment of main transformer differential protection. The main transformer differential protection polarity judgment can be completed according to present conditions and limit resources of the power plant. It is helpful to the main transformer safe & reliable operation as well as first unit initial startup commissioning. The article gives examples of CT polarity judgment methods for main transformer differential protection and gets conclusions through comparison and analysis of these methods. This provide conferences for new built and extended pumped storage power plants on CT polarity judgment of main transformer different protection.
引文
[1]王小军,王胜军,罗胤.抽水蓄能电站首机首次启动方式选择的若干问题分析[J].水电站机电技术,2011,34(1):1-4.WANG Xiaojun,WANG Shengjun,LUO Yin.Analysis of Initial Start-up Mode of the First Unit of Pumped Storage Power Station[J].Mechanical&Electrical Technique of Hydropower Station,2011,34(1):1-4.
[2]沙滨,和扁,陈顺义,徐跃明,吴毅,王胜军,曾祥辉.抽水蓄能电站首机首次起动方式研究分析[J].水力发电,2008,34(10):63-66.SHA Bin,HE Bian,CHEN Shunyi,XU Yueming,WU Yi,WANG Shengjun,ZENG Xianghui.Study and Analysis of Initial Starting-up Mode of the First Unit of Pumped Storage Power Station[J].Water Power,2008,34(10):63-66.
[3]张建立,韩鹏飞.变压器差动保护带负荷校验方法[J].华中电力,2009,22(02):81-83.ZHANG Jianli,HAN Pengfei.The Validation Method for Transfor Differenntial Protection with Load Current.[J]Central China Electic Power,2009,22(02):81-83.
[4]牛利涛,汪成根,牛洪涛.利用短路电流校验母差保护极性的新方法.[J]电力与能源,2014,35(04):535-538.NIU Litao,WANG Chenggen,NIU Hongtao.New Approach to Bus Differetial Protection Polarity Check Using Short Circuit Current[J].Power&Energy,2014,35(04):535-538.
[5]杨洪涛,景城.主变压器差动保护CT极性校验方法探讨[J].水电站机电技术,2010,33(4):16-19.YANG Hongtao,JING Cheng.CT Polarity Verification Method of Main Transformer Differential Protection of Pumped Storage Power Station[J].Mechanical&Electrical Technique of Hydropower Station,2010,33(4):16-19.
[2]沙滨,和扁,陈顺义,徐跃明,吴毅,王胜军,曾祥辉.抽水蓄能电站首机首次起动方式研究分析[J].水力发电,2008,34(10):63-66.SHA Bin,HE Bian,CHEN Shunyi,XU Yueming,WU Yi,WANG Shengjun,ZENG Xianghui.Study and Analysis of Initial Starting-up Mode of the First Unit of Pumped Storage Power Station[J].Water Power,2008,34(10):63-66.
[3]张建立,韩鹏飞.变压器差动保护带负荷校验方法[J].华中电力,2009,22(02):81-83.ZHANG Jianli,HAN Pengfei.The Validation Method for Transfor Differenntial Protection with Load Current.[J]Central China Electic Power,2009,22(02):81-83.
[4]牛利涛,汪成根,牛洪涛.利用短路电流校验母差保护极性的新方法.[J]电力与能源,2014,35(04):535-538.NIU Litao,WANG Chenggen,NIU Hongtao.New Approach to Bus Differetial Protection Polarity Check Using Short Circuit Current[J].Power&Energy,2014,35(04):535-538.
[5]杨洪涛,景城.主变压器差动保护CT极性校验方法探讨[J].水电站机电技术,2010,33(4):16-19.YANG Hongtao,JING Cheng.CT Polarity Verification Method of Main Transformer Differential Protection of Pumped Storage Power Station[J].Mechanical&Electrical Technique of Hydropower Station,2010,33(4):16-19.