CAJ | 학술논문

为了节能减排，许多电站已经或者正在实施大型辅机的变频改造，如何提高辅机变频改造后的可靠性是一个很重要的课题。结合工程实践，比较了不同类型辅机的变频改造方案，重点阐述了辅机变频改造的关键控制技术，包括变频运行时的控制原则、故障工况下的变频工频切换方式、RB工况下的控制策略等方面，并对正确安排辅机变频改造后的相关试验提出了建议。针对不同辅机的特点，采用合理可靠的控制方案，将会有效提高辅机变频改造后机组运行的可靠性。
위료절능감배，허다전참이경혹자정재실시대형보궤적변빈개조，여하제고보궤변빈개조후적가고성시일개흔중요적과제。결합공정실천，비교료불동류형보궤적변빈개조방안，중점천술료보궤변빈개조적관건공제기술，포괄변빈운행시적공제원칙、고장공황하적변빈공빈절환방식、RB공황하적공제책략등방면，병대정학안배보궤변빈개조후적상관시험제출료건의。침대불동보궤적특점，채용합리가고적공제방안，장회유효제고보궤변빈개조후궤조운행적가고성。
For energy-saving and emission reduction,variable frequency retrofits of large auxiliaries have been or are being implemented in many power plants.It is very important how to improve the control reliability after variable frequency retrofit.Combined with engineering practice,Comparison of the frequency retrofit schemes of different kinds of auxiliary is analyzed ,the key control technology of variable frequency retrofit is mainly explained in the paper,including the control principle of variable frequency operation,switching mode between variable frequency and power frequency when fault occurred,and the control strategy in runback conditions, etc.The proper arrangement of related test after variable frequency retrofit is also described.According to the characteristics of different auxiliary,the reliable control scheme will effectively improve the reliability of the auxiliary converter.