作　　者： ; ; ; ;

机构地区： 广西大学电气工程学院

出　　处： 《电力自动化设备》 2010年第10期67-70,共4页

摘　　要： 发电机励磁系统运行固有的调差规律,是由调差特性曲线描述的,它是以发电机空载电势为Y轴上的截距,以调差系数为斜率的点斜式直线方程,发电机励磁系统通过改变励磁电流调节发电机无功输出。运用调差特性曲线来实现励磁系统状态跟踪和经典的增量式PID调节方法,给出了励磁系统状态跟踪的几何求解法和算术求解法,避免了大量复杂的数值计算和由近似计算带来的误差,是一种快速精确求解的方法。并以此设计了双通道互为跟踪互为备用励磁系统,运行通道发生故障情况下,备用通道与运行通道实现无扰切换,保证励磁系统的稳定可靠运行。 The vohage-var curve of generator excitation system describes its inherent characteristic,which is a line with the no-load potential as Y intercept and the adjustment coefficient as slope. Generator excitation system controls the reactive power output by changing excitation current. It is proposed to realize excitation system status tracking and classic incremental PID control based on the vohage-var curve and both geometric and arithmetic methods are presented,fast and accurate,according to which a dual-channel excitation system is designed. Two channels track each other,and the bumpless switchover between standby and operating channels in case of channel fault ensures the stable and reliable operation of excitation system.

关 键 词： 励磁系统 状态跟踪 调差特性曲线 双通道

领　　域： [电气工程]