CAJ | 학술논문

以我国自主研发的600 MW级混流式水轮发电机组投运后的运行状态为例展开研究分析。针对该大型水电站高负荷区出现的异常振动和最大出力不达标的严重问题，从问题的产生机理分析和故障诊断入手，先对引起异常振动的原因展开分析，然后通过对现场稳定性和出力测试结果进行评估，提出了对机组实施改进的方案，即沿着水轮发电机组转轮叶片的出水边进行切割修型，并同时对泄水锥进行改进，再结合数值和同步模型试验的模拟结果进行比较分析，成功地解决了该水电站的高负荷区域异常振动和出力不足问题，并由此提炼出一套较为完整的针对这一类型问题的分析和处理通用方法。
이아국자주연발적600 MW급혼류식수륜발전궤조투운후적운행상태위례전개연구분석。침대해대형수전참고부하구출현적이상진동화최대출력불체표적엄중문제，종문제적산생궤리분석화고장진단입수，선대인기이상진동적원인전개분석，연후통과대현장은정성화출력측시결과진행평고，제출료대궤조실시개진적방안，즉연착수륜발전궤조전륜협편적출수변진행절할수형，병동시대설수추진행개진，재결합수치화동보모형시험적모의결과진행비교분석，성공지해결료해수전참적고부하구역이상진동화출력불족문제，병유차제련출일투교위완정적침대저일류형문제적분석화처리통용방법。
Taking the 600 MW Francis turbine generator unit that is independently researched and developed by domestic insti-tutes and then put into operation in a large hydropower station as a study object, the abnormal vibration and insufficient maximum output of the unit in high-load operation are studied through problem genesis mechanism analysis and failure diagnosis. The cau-ses of the abnormal vibration are first analyzed, and the improvement scheme is proposed according to the field test results of unit stability and output. By trimming the outlet edge of the runner blade and modifying the runner cone, in combination with compari-son and analysis of numerical simulation and simultaneous model test results, the problems of abnormal vibration and insufficient maximum output of the unit in high-load operation are successfully solved, on the basis of which, a general and relatively com-plete problem analysis and solution formula is summarized.