内蒙古电力技术
內矇古電力技術
내몽고전력기술
Inner Mongolia Electric Power
2015年
5期
95-97
,共3页
离相封闭母线%电流互感器%结露%积水%微正压装置
離相封閉母線%電流互感器%結露%積水%微正壓裝置
리상봉폐모선%전류호감기%결로%적수%미정압장치
isolated phase busbar%ammeter transformator%dewing%hydrops%slight pressure device
某电厂2号机组由于微正压装置气源湿度过大、空压机除水能力下降、环境温差大、封闭母线密封不严、TA段母线结构存在问题等原因，造成高压厂用变压器高压侧封闭母线TA段结露、积水，引起放电，最终导致机组跳闸。根据以上原因提出解决措施：更换空压机气源，更换微正压装置的干燥剂，加装气体加热装置，并对高压厂用变压器高压侧封闭母线TA段进行改造等。采取以上措施后，封闭母线TA段结露、积水得以消除，保证了机组的安全稳定运行。
某電廠2號機組由于微正壓裝置氣源濕度過大、空壓機除水能力下降、環境溫差大、封閉母線密封不嚴、TA段母線結構存在問題等原因，造成高壓廠用變壓器高壓側封閉母線TA段結露、積水，引起放電，最終導緻機組跳閘。根據以上原因提齣解決措施：更換空壓機氣源，更換微正壓裝置的榦燥劑，加裝氣體加熱裝置，併對高壓廠用變壓器高壓側封閉母線TA段進行改造等。採取以上措施後，封閉母線TA段結露、積水得以消除，保證瞭機組的安全穩定運行。
모전엄2호궤조유우미정압장치기원습도과대、공압궤제수능력하강、배경온차대、봉폐모선밀봉불엄、TA단모선결구존재문제등원인，조성고압엄용변압기고압측봉폐모선TA단결로、적수，인기방전，최종도치궤조도갑。근거이상원인제출해결조시：경환공압궤기원，경환미정압장치적간조제，가장기체가열장치，병대고압엄용변압기고압측봉폐모선TA단진행개조등。채취이상조시후，봉폐모선TA단결로、적수득이소제，보증료궤조적안전은정운행。
Unit 2 in some power plant was forced to shutdown, because the air source of slight pressure device was too moist, the water removal capacity of air compressors was decling, environmental temperature was quite different, the enclosed busbar had leakage, some faults existed in parts of busbar′s structure of branch circuit TA, which caused the dewing and hydrops in isolated phase busbar in TA section, and further caused the discharge and shutdown. The measures of replacing the air source of air compressor, equipped with gas heating device, and transforming the isolated phase busbar TA section of HV auxiliary transformer high voltage side, eliminated the dewing and hydrops, which ensured the safe and stable operation of the unit.
