| 引用本文: | 卞文倩,李飞,赵晋斌.基于LCL型逆变器的数字陷波器有源阻尼方法研究[J].电力系统保护与控制,2017,45(21):14-19.[点击复制] |
| BIAN Wenqian,LI Fei,ZHAO Jinbin.Research on digital notch filter active damping based on LCL-type inverter[J].Power System Protection and Control,2017,45(21):14-19[点击复制] |
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| 基于LCL型逆变器的数字陷波器有源阻尼方法研究 |
| 卞文倩,李飞,赵晋斌 |
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| (上海电力学院，上海 200090;中国矿业大学，江苏 徐州 221008) |
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| 摘要: |
| 为了解决传统电容电流比例反馈有源阻尼方法控制结构复杂以及由系统延时所导致的谐振阻尼区域狭小等问题，对基于陷波器的有源阻尼方法进行了研究。将系统的谐振阻尼区域从(0，fs/6)拓展到(0，fs/2)，消除了延时所带来的影响。同时，为了减小谐振频率波动对陷波器陷波效果的影响，利用经典控制理论中有关偶极子的经验法则得到陷波器允许的谐振频率最大波动范围。并通过系统闭环传递函数的零极点图对系统稳定性进行分析，设计出合理的阻尼比。Matlab/Simulink仿真与实验结果验证了所设计的陷波器有源阻尼方法的有效性。 |
| 关键词: LCL型逆变器 系统延时 有源阻尼 陷波器 |
| DOI：10.7667/PSPC161723 |
| 投稿时间：2016-10-17修订日期：2017-02-01 |
| 基金项目:上海自然科学基金项目(16ZR1413000);上海绿色能源并网工程技术研究中心(13DZ2251900) |
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| Research on digital notch filter active damping based on LCL-type inverter |
| BIAN Wenqian,LI Fei,ZHAO Jinbin |
| (Shanghai University of Electric Power, Shanghai 200090, China;China University of Mining and Technology, Xuzhou 221008, China) |
| Abstract: |
| To solve the problem of the traditional capacitor current proportional feedback active damping method, of which the control structure is complex and resonance damping region is narrow caused by system time delay, the damping method based on the notch filter is instituted and the system resonance region is expended from (0, fs/6) to (0, fs/2), which eliminates the influence of time delay. At the same time, to impair the influence of the resonance frequency fluctuation on the notch filter, the maximum resonance frequency fluctuation range is accumulated by empirical law of classical control theory about the dipoles. Then, the zero and pole map of the close-loop transfer function is used to analyze the system stability. Finally, a reasonable damping ratio is designed. The effectiveness of the designed notch filter active damping method is verified by Matlab/Simulink simulation and experiment. This work is supported by Natural Science Foundation of Shanghai (No. 16ZR1413000) and Shanghai Engineering Research Center of Green Energy Grid-connected Technology (No. 13DZ2251900). |
| Key words: LCL-type inverter system time delay active damping notch filter |
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