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1前言阎王鼻子水库地处边远山区，给电力系统的运行和维护带来很多不便，为了改变这种运行状况，减轻运行与维护的工作量，必需提高装置的自动化水平及设备的可靠性、可维护性．可编程序控制器已广泛应用于各行各业，是一种面向生产过程控制的数字电子装置，它具有控制能力强、
1 Introduction Yan Wang nose reservoir is located in remote mountainous areas, to the power system operation and maintenance of a lot of inconvenience, in order to change this operating conditions, reduce the workload of operation and maintenance, the device must improve the level of automation and equipment reliability, Maintainability. Programmable logic controller has been widely used in all walks of life, is a digital electronic device for production process control, which has strong control,