“双脉冲式”柴油发电机数字调速器的设计与仿真研究

Double-pulse" digital speed controller for diesel-generating sets

柴油发电机数字调速器采集转速和功率两种信号实施控制，控制器由前馈、反馈和补偿控制三部分组成，控制规律由软件实现．补偿控制器用来抑制负荷扰动和并联运行的有功分配，控制规律采用闭环传递函数模型极点配置法设计．由于采用了ＩＴＡＥ性能指标，使系统能较好地兼顾最大超调和调整时间．静态特性可以设定为无差或任何期望的调差率，也可以设定为虚有差特性．数字仿真和分析表明该系统是鲁棒的．

The digital controller, designed for the speed-governor of diesel-generator, picks up both the speed signal and power signal to implement control. The controller consists of three parts:feedforward, feedback and compensator. The control law is implemented by software. The compensator is used to reject load disturbance and to regulate power division if the generating set operated in parallel. The control law is designed by using the pole-assignment technique with the desired colsed-loop transfer function model. Since the ITAE index is employed, a better compromise between the maximum overshoot and the settling time is achieved. The steadystate characteristic is able to be set with zero-drop or any desired speed-droop, and also to be set to a virtual drop characteristic. Digital simulation and analysis show that the system is robust.