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.
出处
《自动化信息》
2006年第4期38-39,61,共3页
Automation Information
关键词
PWM逆变器
非线性负载
波形畸变
离散滑模控制
oPWM Inverter
Nonlinear Load
Waveform Distortion
Discrete Sliding-mode Control
