| 一种新型的PWM变换器LCL滤波器有源阻尼控制策略 |
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| 引用本文： | 张学广,刘义成,王瑞,徐殿国. 一种新型的PWM变换器LCL滤波器有源阻尼控制策略[J]. 电工技术学报, 2011, 0(10): 188-192 |
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| 作者姓名： | 张学广 刘义成 王瑞 徐殿国 |
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| 作者单位： | 哈尔滨工业大学电气学院;国电南京自动化股份有限公司 |
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| 基金项目： | 国家自然科学基金(50877017);国家自然科学基金青年科学基金(51107020);哈尔滨工业大学科研创新基金(HIT.NSRIF2010104)资助项目 |
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| 摘 要： | 本文提出了一种新型的PWM变换器LCL滤波器有源阻尼控制方法。针对LCL滤波器的谐振问题,传统的方法是在滤波电容上串联电阻来抑制谐振,但这种方法会带来功率损耗。通过有源阻尼控制,可以有效地抑制LCL可能带来的谐振。在有源阻尼方法基础上提出了滤波电容电流反馈的设计方法,同时结合滤波电容电流估算的方法,实现了无附加电流传感器的LCL滤波器的有源阻尼控制。这种方法可以有效地抑制系统谐振,改善变换器输出电流波形,同时不需要增加额外的传感器。实验结果验证了这种方法的有效性和实用性。
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| 关 键 词： | PWM整流器 LCL滤波器 有源阻尼 无电流传感器 |
A Novel Active Damping Control Strategy for PWM Converter with LCL Filter |
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| Zhang Xueguang,Liu Yicheng,Wang Rui,Xu Dianguo. A Novel Active Damping Control Strategy for PWM Converter with LCL Filter[J]. Transactions of China Electrotechnical Society, 2011, 0(10): 188-192 |
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| Authors: | Zhang Xueguang Liu Yicheng Wang Rui Xu Dianguo |
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| Affiliation: | 1(1.Harbin Institute of Technology Harbin 150001 China 2.Guodian Nanjing Automation Co.Ltd Nanjing 210003 China) |
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| Abstract: | A novel active damping control strategy for PWM converter with LCL filter is proposed in this paper.There is resonant peak in LCL filter frequency response.Conventional method is connecting a resistor in series with the filter capacitor to resolve the resonant peak,but the power loss will be brought by this passive damping method.The resonant peak could be damped by proper control strategy which is called active damping.A novel design method of filter capacitor current feedback loop is introduced.The filter capacitor current estimate method is adopted so there is no addition sensors needed.The resonant peak is attenuated and the waveform of output current is improved.Finally,the feasibility of the proposed method is verified through experimental results. |
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| Keywords: | PWM rectifier LCL filter active damping current sensorless |
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