摘要
参数敏感性问题一直是制约有限控制集模型预测控制(FCS-MPC)工程应用的关键,在此以永磁同步电机(PMSM)高性能调速系统为研究对象,提出一种基于无模型预测控制(MF-MPC)的PMSM鲁棒调速方法。首先建立了PMSM连续域数学模型,进而推导出传统FCS-MPC中基于PMSM参数的离散预测模型。在此基础上,引入MF-MPC理论,构建了适用于PMSM调速系统的“激励-响应”离散预测模型,设计了满足高性能转矩、磁链控制的价值函数,并针对实际系统中因开关死区造成的电流抖动问题,提出一种基于二次采样的修正方法。最后,基于实验室25kW对拖样机对传统FCS-MPC和所提MF-MPC的控制性能进行对比测试,实验结果表明,该方法摒弃了传统FCS-MPC参数模型构建思路,无需知晓被控对象PMSM系统结构及参数,一方面保留了传统FCS-MPC高动态响应特性,另一方面系统鲁棒性得到显著提升。
The parameter sensitivity problem is the key limitation of finite control set model predictive control (FCS-MPC) for its engineering application.To solve this problem , the high performance speed regulation system of permanent magnet synchronous motor(PMSM) is studied, and the robust speed control method called model-free model predictive control (MF-MPC ) is proposed.Firstly , the continuous domain mathematical model of PMSM is established.Then the discrete prediction model based on PMSM parameter in traditional FCS-MPC is deduced.On this basis, the MF-MPC theory is introduced. The "excitation-response" discrete prediction model for PMSM speed regulation system is constructed.The cost function satisfying high performance torque and flux control is designed.And in view of the current jitter problem caused by the dead time of the switch in the actual system , a correction method based on secondary sampling is proposed. Finally ,the control performance of traditional FCS-MPC and MF-MPC is compared and tested based on 25 kW PMSM in the laboratory.Experimental results show that the conventional FCS-MPC parameter model construction idea is abandoned.The structure and parameters of the PMSM system is not need to known.On the one hand, MF-MPC retained the high dynamic response characteristics of traditional FCS-MPC, and on the other hand, the system robustness is significantly improved.
作者
曹晓冬
杨世海
陈宇沁
方磊
CAO Xiao-dong;YANG Shi-hai;CHEN Yu-qin;FANG Lei(State Grid Jiangsu Electric Power Company Power Research Institute,Nanjing 210000,China)
出处
《电力电子技术》
CSCD
北大核心
2019年第10期43-47,共5页
Power Electronics
基金
国家重点研发计划(2016YFB0901100)
国家电网公司科技项目(SGJSDK00JLJS1800094)~~
关键词
永磁同步电机
预测控制
激励响应模型
permanent magnet synchronous motor
predictive control
incentive -response model
