| 引用本文: | 韩 璐,肖 建,向伟铭,邱存勇.考虑系统延时的三相APF切换系统建模与H∞控制[J].电力自动化设备,2013,33(12): |
| HAN Lu,XIAO Jian,XIANG Weiming,QIU Cunyong.Switching system modeling and H∞ control of three-phase APF with time-delay[J].Electric Power Automation Equipment,2013,33(12): |
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| 摘要: |
| 考虑系统时滞因素，突破传统对有源电力滤波器（APF）分析时所用的近似线性化处理方式，建立了一种基于离散仿射切换理论的三相APF仿射时滞离散切换模型。在此基础上将电网侧谐波电流作为控制输出，前馈预测的指令谐波电流与理想指令谐波电流误差作为干扰项，提出H∞控制器和切换规则的设计方法，进而实现谐波电流跟踪控制。仿真分析表明，该方法在精确反映三相APF动态特性的同时有效补偿了系统时滞，避免了时滞现象对系统补偿效果和稳定性的不良影响。 |
| 关键词: 有源滤波器 切换系统 时滞 离散仿射切换模型 H∞控制器 鲁棒控制 |
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| 基金项目:国家自然科学基金资助项目（51177137，61134001） |
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| Switching system modeling and H∞ control of three-phase APF with time-delay |
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HAN Lu, XIAO Jian, XIANG Weiming, QIU Cunyong
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College of Electrical Engineering，Southwest Jiaotong University，Chengdu 610031，China
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| Abstract: |
| Instead of the traditional linearization method used in APF（Active Power Filter） analysis，the discrete affine switching theory is applied in the modeling of three-phase APF with time-delay，based on which，its H∞ controller and switching rules are designed. The harmonic current at grid side is regarded as the control output and the error between the instructive harmonic current predicted by feedforward control and the ideal instructive harmonic current is considered as the distracter to follow and control the harmonic current. Simulative results show that the proposed method reflects the dynamic characteristics of three-phase APF accurately while compensates the system time-delay effectively，avoiding its adverse influence on system compensation effect and stability. |
| Key words: active filters switching system time-delay discrete affine switching model H∞ controller robust control |
