基于LADRC与混合混沌序列RFPWM调制的DSTATCOM控制策略  

DSTATCOM Strategy Based on LADRC and Hybrid Chaotic Sequence of RFPEM

作　　者：李超[1] 周雪松[1] 邵磊[1] 

机构地区：[1]天津理工大学天津市复杂系统控制理论及应用重点实验室,天津300384

出　　处：《化工自动化及仪表》2013年第7期850-853,859,共5页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金项目(50877053);天津市自然科学基金项目(09JCYBJC07100)

摘　　要：配电网静止同步补偿器(Distribution Static Synchronous Compensator,DSTATCOM)是改善配电网系统电能质量的有效方法。针对级联多电平DSTATCOM中随机开关频率脉宽调制(Random Frequen-cy Pulse Width Modulation,RFPWM)方式谐波含量较大,随机信号的选取和实现方式比较困难,提出一种新的基于混合混沌序列的RFPEM调制策略。同时针对该系统强耦合的特点,使用线性自抗扰控制器(Linear Auto-disturbance Rejection Controller,LADRC)中的扩张状态观测器(Linear Extended States Ob-server,LESO)估计出系统内扰(包括模型的不确定项和耦合项)和外扰的实时作用并给予补偿,从而实现了d、q轴电流解耦的自抗扰控制。仿真结果表明:该综合控制策略在降低谐波的同时,具有更好的快速性和鲁棒性。The DSTATCOM can improve power quality in power distribution system.Considering the high pulse harmonic content and difficulty in random selection and implementation of signals,a new RFPEM control strategy based on hybrid chaotic sequence was presented ; aiming at the characteristics of strong coupling of this system,the LESO in LADRC was used to estimate and compensate the real action of the system＇ s internal （including unmeasured and coupled state） and external unknown disturbances so as to realize auto-disturbance rejection control on d,q axis current decoupling.The simulation results prove this strategy＇s better rapidity and robustness and its capability in decreasing harmonic amplitude

关 键 词：静止同步补偿器 线性自抗扰控制器 混合混沌序列 解耦控制 快速性 鲁棒性 

分 类 号：TH862[机械工程—仪器科学与技术]