UPS逆变器电压波形失真原因及其离散滑模控制对策  

The Cause of Voltage Waveform Distortion and Discrete Sliding-mode Control Strategy of USP Inverter

作　　者：赵世峰[1] 王奔[1] 华晓萍[1] 谢云秀[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都

出　　处：《自动化信息》2006年第4期38-39,61,共3页Automation Information

摘　　要：本文分析了应用于不间断电源（UPS）的脉宽调制（PWM）逆变器带非线性负载时输出波形畸变的原因和影响。根据产生畸变的原因，将波形畸变分成瞬态畸变和稳态畸变，并提出采用带线性前馈控制的离散滑模控制策略改善输出电压波形。针对稳态畸变，线性前馈控制保证系统输出龟压有较好的跟踪质量；针对瞬态畸变，离散滑模控制保证系统的鲁棒性。This paper presents the cause and effect of the output wavefo rm distortion of the Pulse-width modulated （PWM） inverter used in an unintcrruptible power supply （UPS） with nonlinear load ,The wavefonn distortion includes transit distortion and steady distortion. Based on the caused of wavefonrt distortion, the paper introduces a discrete sliding-mode control solution with linear feed forward controller to minimize the waveform distortion. In designing the sliding-mode controller, To enhance the robustness of the PWM inverter, transit distort;.on has been taken into consideration. The feed forward controller is proposed to take care of the steady-state response in addition to the sliding-mode controller.

关 键 词：PWM逆变器 非线性负载 波形畸变 离散滑模控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TM464[自动化与计算机技术—控制科学与工程]