一、前言可编程序控制器(简称 PC)在水电厂控制装置上的应用已相当普遍,并已成为构成控制装置核心的不可缺少的部分。同时,PC 的应用范围也有所扩大,无论在程序控制功能方面还是在调整控制功能方面都有所增加,目前,PC 所扩大的功能有:目动电压调整功能、调速控制功能、自动同期并网功能、远方监视子系统功能、监控功能等。并且进一步向数字保护继电器组件或与 CRT I. INTRODUCTION The application of programmable logic controllers (PC) in hydropower plant control devices has become quite common and has become an indispensable part of the core of control devices. At the same time, the application range of the PC has also been expanded, both in terms of program control functions or in the adjustment of control functions have increased, at present, PC expanded features are: dynamic voltage adjustment function, speed control, automatic synchronization and Network functions, remote monitoring subsystem functions, monitoring functions. And further to digital protection relay components or with CRTs