基于闭环辨识的H_(∞)-PID热电功率回路参数整定  

H_(∞)-PID Thermoelectric Power Loop Parameter Tuning Based on Closed-loop Identification

作　　者：肖华 王亚刚[1] 张伟[1] XIAO Hua;WANG Ya-gang;ZHANG Wei(School of Optical-electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《控制工程》2021年第4期821-826,共6页Control Engineering of China

基　　金：国家自然科学基金资助项目(61074087,61703277);国家自然科学基金青年基金资助项目(11502145);上海市自然科学基金资助项目(17ZR1419000)。

摘　　要：提出了基于闭环频域辨识模型的鲁棒H_(∞)-PID参数整定法,并介绍了该方法在解决热能电厂一次调频功率振荡中的应用。该方法相较于常用的经验试凑法和Ziegler-Nichol整定法,既能保证控制回路具有良好的抗干扰性,又能保证系统的动态特性。利用该方法对闭环模型进行设定值阶跃扰动实验,通过多次迭代运算对系统频率响应特性进行辨识,构建过程对象模型,然后在内模控制基础上结合PID鲁棒控制,进行参数的整定。热能电厂实际应用情况表明,该方法能有效地解决机组一次调频功率振荡问题,能较好地克服发电过程的内外扰动。This paper proposes a robust H_(∞)-PID parameter tuning method based on closed-loop frequency domain identification model and introduces the practical application of this method to solve the primary frequency power oscillation of thermal power plants. Compared with the commonly used experience-based trial-and-error method and Ziegler-Nichol tuning method, the method can ensure that the control loop has good anti-interference and guarantee the dynamic characteristics of the system. This method is used to perform the set value step disturbance test on the closed-loop model. The system frequency response characteristics are identified through multiple iterations and the process object model is constructed. Then, on the basis of internal model control, the parameters are tuned in combination with PID robust control. Through the practical application of the thermal power plant, it is shown that the method of this paper can effectively solve the problem of the primary frequency power oscillation of the unit, and can better overcome the internal and external disturbances of the power generation process.

关 键 词：热能电力机组 鲁棒H_(∞)控制 闭环频域辨识 汽机功率控制回路 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]