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某联合循环机组加速度保护动作跳机,由于油质化验错误,使得事件原因变得复杂,虽先后进行反馈装置和信号电缆屏蔽接地的可靠性检查、现场抗干扰性能试验、请外方专家现场分析等,但仍未能找到故障原因。后从油路上检查,发现阀门控制油滤网中存在大量软油皮,找到了故障原因,通过更换阀门滤网的方法消除了故障现象。对该故障分析查找过程中的经验与教训进行了总结,提出了跳机故障的防范措施,供专业人员参考。
The acceleration of a certain combined cycle unit is tripped because of the error of oil quality test, which complicates the cause of the accident. Although the reliability check of the feedback device and signal cable shielding grounding and the on-site anti-interference performance test have been conducted successively, Etc., but still failed to find the cause of the malfunction. After inspection from the oil and found that the valve control oil filter there is a lot of soft oil skin, find the cause of the malfunction, by replacing the valve filter method to eliminate the fault phenomenon. The experience and lessons learned in the process of fault analysis and finding are summarized, and the preventive measures for the fault of the jumping machine are proposed for the reference of professionals.