执行机构反馈方式对汽轮机调节系统响应特性的影响

Effects of Feedback Type of the Actuator on the Dynamic Response of Steam Turbine Speed Governing System

采用频率特性分析和计算机仿真试验的方法，对执行机构具有不同反馈方式的汽轮机调节系统的响应特性进行了分析研究。结果表明：执行机构的反馈方式对系统的响应特性有着重大的影响，任何局部正反馈的存在，都将使系统的稳定性降低，机组甩负荷后的动态超速增大。

Abstract:The operating performances of speed governing systems with different feedback type of actuator for a reheat steam turbine are studied by using the frequency analysis and numerical simulation method. The results show that the feedback type of actuator has significant influence on the dynamic response of the governing system. The existence of any local positive feedback action of the feedback mechanism will result in the decrease in the stability of the system and the increase in the transient overspeed of turboset at full load rejection