无交流电压传感器的三相变流器模型预测控制  

Study of Model Predictive Control of PWM Voltage Source Converter without AC Electromotive Force Sensor

作　　者：李辉[1,2] 李志 章兢[1] 彭寒梅[1] 

机构地区：[1]湘潭大学信息工程学院,湖南湘潭411105 [2]海上风力发电技术与检测国家重点实验室,湖南湘潭411102

出　　处：《系统仿真学报》2017年第7期1489-1496,共8页Journal of System Simulation

基　　金：国家自然科学基金(51507149);湖南省教育厅项目(14C1068)

摘　　要：传统的三相变换器模型预测控制(MPC)需采用交流电动势传感器,从而降低了系统可靠性。提出了无交流电动势传感器的三相变流器模型预测控制,通过直流母线电压、开关信号和交流电流构建虚拟磁链观测器,建立了基于虚拟磁链定向的三相变流器模型预测控制二次规划数学模型(QP-MPC),利用二次规划算法使系统快速计算出最优变化量,最小化目标函数,得出最优的开关管控制信号,从而优化系统性能。仿真验证了所提控制策略的有效性。The traditional model-predictive-control（MPC）, applied to three-phase converter, requires to use AC electromotive force sensor, and then it reduces the system reliability. A three-phase converter model predictive control without AC electromotive force sensor was proposed, and the virtual flux observer was constructed by DC bus voltage, switching signal and AC current. On this basis, a mathematical model of three-phase converter model predictive control quadratic programming（QP-MPC） based on virtual flux oriented was established. Using quadratic programming algorithm, the system can quickly calculate the optimal change, minimize the objective function, and obtain the optimal switch control signal, so as to optimize the system performance. The simulation results verify the feasibility and effectiveness of the proposed control strategy.

关 键 词：变流器 二次规划 模型预测控制 龙伯格观测器 

分 类 号：TM862[电气工程—高电压与绝缘技术]