前言 在电力运行系统中,各级电力调度中心集中管理着许多个大中型发电厂和变电站,而这些厂站一般都分敞在各地,与调度中心相距数十公里以致数百公里,为了提高电网运行的可靠性和经济性,调度中心必须对各主要厂站的机组和输电线路的运行状态及参数进行实时收集监视,并及时处理那些影响整个系统正常运 Preface In the electric power operation system, power dispatching centers at various levels centrally manage many large and medium-sized power plants and substations, which are generally located in different places and are several tens of kilometers away from dispatching centers by tens of kilometers. In order to improve the power grid Operation reliability and economy, the dispatch center must collect and monitor the operating status and parameters of the main plant units and transmission lines in real time, and deal with the problems that affect the normal operation of the entire system