| 引用本文: | 张金科,伍小杰,赵明龙,王 钊.开关频率对SPWM逆变器动态行为的影响[J].电力自动化设备,2015,35(11): |
| ZHANG Jinke,WU Xiaojie,ZHAO Minglong,WANG Zhao.Impact of switching frequency on dynamic behavior of SPWM inverter[J].Electric Power Automation Equipment,2015,35(11): |
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| 摘要: |
| 基于混沌分岔理论，研究了开关频率对单相正弦脉宽调制（SPWM）逆变器的影响。以基本H桥逆变器为研究对象，采用一阶离散模型分析系统的混沌行为。应用频闪映射图、分岔图和频谱图，从时域到频域详细分析了开关频率对逆变器动态性能的影响。通过时滞反馈控制改善了系统在中低频段的混沌状态，并结合二阶时滞模型的雅可比矩阵特征值给出了系统稳定运行的参数域。通过仿真与实验，观察了电流在不同开关频率（3 kHz和2 kHz）下的分岔和混沌行为。结果表明，时滞反馈控制能有效抑制低开关频率造成的混沌，当时滞系数取0.22时，控制器抑制混沌的效果最好。 |
| 关键词: 开关频率 SPWM 逆变器 二维分岔图 混沌控制 时滞反馈控制器 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目（51377160）；江苏省研究生培养创新工程（CXLX13_939） |
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| Impact of switching frequency on dynamic behavior of SPWM inverter |
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ZHANG Jinke, WU Xiaojie, ZHAO Minglong, WANG Zhao
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School of Information and Electrical Engineering，China University of Mining and Technology，Xuzhou 221008，China
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| Abstract: |
| Based on the chaos and bifurcation theory，the influence of switching frequency on the single-phase SPWM（Sinusoidal Pulse Width Modulation） inverter is studied. With a basic H-bridge inverter as the research object，a first-order discrete model is applied to analyze the chaos behavior of SPWM inverter system. The stroboscopic map，bifurcation diagram and frequency spectrum are plotted to describe the influence in time domain and frequency domain. A TDFC（Time-Delayed Feedback Controller） is used to improve the chaos behavior of system at mid／low frequency，and the parameter region of stable system operation is calculated based on the Jacobi matrix of a second-order time-delayed model. The bifurcate and chaotic behaviors at different switching frequencies（3 kHz and 2 kHz） are observed through simulations and experiments. Results show that，the TDFC can effectively suppress the chaos induced by low switching frequency and the best suppression effect is achieved when the time-delay factor is 0.22. |
| Key words: switching frequency SPWM electric inverters 2-D bifurcation diagram chaos control time-delayed feedback controller |
