低励限制整定原则与调试方法

摘要

In power system when operating in dry season and low loadcondition,it is common that the operating voltage will be higher.One effective way of solving this problem is to adjust the phase of generator from lag to lead.In order to assure operating properly in phase lead,the low exciting limit unit in the exciter control system should not only be put into operation as equirement but also be adjusted correctly.The paper introduced setting principle,calculation and testing method for the low exciting limit unit using the static out of step characteristic circle.%电力系统在枯水小方式下普遍存在系统运行电压偏高的情况，调整发电机从滞相到进相运行，是解决运行高电压的有效途径之一。为了保证机组正常进相运行，其励磁控制系统中的低励限制单元不仅要按要求投运，而且要正确整定。文中介绍了采用静态失步圆特性低励限制的整定原则、计算方法及调试方法。