基于多滑模变结构控制的三相PWM整流器非线性控制

发布时间：2018-01-10 15:11

  本文关键词：基于多滑模变结构控制的三相PWM整流器非线性控制　出处：《电工技术学报》2016年04期 　论文类型：期刊论文

  更多相关文章： 三相PWM整流器 输入、输出反馈线性化 滑模变结构控制 非线性控制 微分几何

【摘要】：针对三相PWM整流器的非线性特点,并进一步改善系统的起动响应、稳态特性及动态特性,提出一种输入、输出反馈线性化控制与滑模变结构控制相结合的多滑模变结构控制策略。电压外环采用基于指数趋近律的滑模变结构控制策略,确保输出电压稳定并给电流内环提供参考指令电流。在建立三相PWM整流器两输入、两输出仿射非线性模型的基础上,对电流内环进行线性化处理,并利用滑模变结构控制理论设计了电流内环控制器。为了验证系统的可行性,在Matlab/Simulink环境中建立仿真模型,并搭建了15k W的实验样机。仿真与实验结果验证了控制方案的正确性,利用所提控制方案设计的整流器具有系统动态特性好、鲁棒性强和抗干扰能力强等优点,同时也克服了输入、输出反馈线性化需要精确数学模型的缺点。
[Abstract]:Aiming at the nonlinear characteristics of the three-phase PWM rectifier, and further improving the starting response, steady state and dynamic characteristics of the system, a kind of input is proposed. The multiple sliding mode variable structure control strategy combined with output feedback linearization control and sliding mode variable structure control. The voltage outer loop adopts sliding mode variable structure control strategy based on exponential approach law. The output voltage is stable and the reference instruction current is provided to the current inner loop. Based on the establishment of two input and two output affine nonlinear models of the three-phase PWM rectifier, the current inner loop is linearized. The current inner loop controller is designed by using the sliding mode variable structure control theory. In order to verify the feasibility of the system, the simulation model is established in the Matlab/Simulink environment. The experimental prototype of 15kW is built. The simulation and experimental results verify the correctness of the control scheme. The rectifier designed by the proposed control scheme has good dynamic characteristics of the system. It also overcomes the disadvantages of input and output feedback linearization which requires accurate mathematical model.
【作者单位】： 华南理工大学电力学院;广西大学物理科学与工程技术学院;
【基金】：国家自然科学基金(512277034) 广州市珠江科技新星专项(2012J2200042)资助
【分类号】：TM461
【正文快照】： 0引言三相PWM整流器由于具有能量“绿色”且双向流动、网侧功率因数高、电流畸变小和输出电压可调等优点,成为现代电力电子领域研究的热点问题之一,并广泛应用在有源电力滤波器、风力发电、光伏发电、不间断电源(UPS)和新兴混合动力车充电站等工业领域。各种控制策略,如:PI控，

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