单元机组协调控制系统综合性能评价  

Comprehensive Performance Assessment on Coordinated Control System of Thermal Power Units

作　　者：袁桂丽[1] 陆斯悦 房方[1] YUAN Guili LU Siyue FANG Fang(School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China)

机构地区：[1]华北电力大学控制与计算机工程学院,北京102206

出　　处：《动力工程学报》2017年第11期895-902,共8页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(61240037;51676068)

摘　　要：针对多变量形式的单元机组协调控制系统,提出一种基于等效开环传递函数的性能评价方法.将该方法与最小信息熵指标相结合,解决了协调控制系统受到非高斯噪声干扰时,传统多变量评价方法对系统随机性性能评价不准确的问题.将系统确定性性能指标处理成标量形式,通过子目标乘除法与随机性性能指标结合,得到兼顾确定性性能与随机性性能的综合性能指标.利用该综合性能指标指导协调控制系统控制器设计,将其作为目标函数,通过优化算法对控制器参数进行寻优,得到最优控制性能.以最优指标作为基准,对系统在运行期间的性能进行监测与评价.结果表明:对于该协调控制系统,自抗扰控制器比内模PI控制器具有更好的综合性能,稳健性也更好.A performance evaluation method based on equivalent open-loop transfer function was proposed for the multi-variable coordination control system of thermal power units.Combined with the minimum information entropy index,this method is able to solve the problem that traditional multivariable performance assessment method cannot accurately evaluate the stochastic performance of the coordinated control system when the system is disturbed by non-Gaussian noise.By transforming the deterministic index of system into the scalar form,and by combining the sub goal multiplication and division with the stochastic performance,a comprehensive index of both deterministic performance and stochastic performance is then obtained,which can be used to guide the design of the coordinated controller.Taking the comprehensive index as the objective function,an optimal control performance could be acquired through optimization of the controller parameters.The performance of the coordinated control system in the thermal power unit was monitored and evaluated in the process of operation by using the optimal index as a benchmark.Simulation results show that for the coordinated control system,the comprehensive performance and robustness of the active disturbance rejection controller is better than those of internal model PI controllers.

关 键 词：协调控制系统 等效开环传递函数 最小信息熵 自抗扰控制 性能评价 

分 类 号：TP202[自动化与计算机技术—检测技术与自动化装置]