一种隐藏的监控系统缺陷处理探讨

Brief Discussion on Treatment of a Kind of Hidden Defects in Monitoring System

在水电站监控系统调试中,由于各种原因,使调试人员很难完全真实地模拟机组状态,导致一些隐藏的缺陷很难发现和消除。机组在发生过速事故时,都是从额定转速增加到一级过速,故障继续扩大发展到二级过速。随着事故的扩大,水电站计算机监控系统能够根据事故的级别,正确启动相应的事故停机流程。本文描述的监控系统漏洞,就是一种监控系统在不同级别的事故同时发生时,监控系统事故流程不能正常启动的案例。这类缺陷在计算机监控系统缺陷中,属于典型的程序逻辑错误,给机组稳定运行带来了极大的危害。因为涉及到机组紧急停机,一旦机组发生事故,就可能继续扩大,发生机组二级过速甚至飞逸事故。

During debugging of the monitoring system of hydropower station,it is very difficult for the debugging personnel to simulate the status of units completely and some hidden defects are difficult to be discovered and eliminated.In the event of over-speed accident,the unit normally climbs to the level-1 over-speed from the rated speed before coming to level-2 over-speed.With the expansion of the fault,the computer monitoring system of the hydropower station can correctly start the corresponding shutdown process according to the level of the accident.The bugs of the monitoring system described in this paper is a case in which the accident process cannot be started normally when different levels of accidents occur at the same time.Such defects are typical program logic errors in the computer monitoring system,which bring great harm to the stable operation of the unit.Because of emergency shutdown,once accident occurs on the unit,the accident may expand further,and it may lead to level-2 over-speed of the unit or even runaway of the unit.