| 引用本文: | 刘海春,曹鸿,谢少军.基于无源阻尼和谐波陷阱的UPS滤波器[J].电力自动化设备,2020,40(3): |
| LIU Haichun,CAO Hong,XIE Shaojun.UPS filter based on passive damping and harmonic trap[J].Electric Power Automation Equipment,2020,40(3): |
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| 摘要: |
| 在常用的LC型滤波器基础上对滤波器的改进设计进行了研究，采用无源阻尼和开关频率次谐波陷波相结合的方式，对滤波器的结构进行了优化。首先分析了无源阻尼的实现方式，对比了Rd阻尼法和Rd-Cd阻尼法，根据电路参数对品质因子Q的影响，给出了阻尼参数的选择方法。其次，对开关频率次谐波的陷波技术进行了研究，针对串联型LCtrap和并联型LCtrap这2种陷波滤波器，分析了谐波陷阱电感、电容参数对滤波器带宽的影响。最后提出了LCtrap-LC-RC型和LC-RC-LCtrap型2种结构的滤波器，分析了2种滤波器的滤波性能。仿真和实验结果验证了所提不间断电源(UPS)滤波器可以有效提高电源输出电压的波形质量，减小其体积重量。 |
| 关键词: 逆变器 无源阻尼 有源阻尼 谐波陷阱 滤波器 UPS |
| DOI：10.16081/j.epae.202002034 |
| 分类号:TM619;TN713 |
| 基金项目:国家自然科学基金资助项目(51877104) |
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| UPS filter based on passive damping and harmonic trap |
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LIU Haichun, CAO Hong, XIE Shaojun
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College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
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| Abstract: |
| Approaches to improve LC filter which is commonly adopted in inverter are studied and a combination of passive damping and harmonic trap is used to optimize the filter structure. Firstly, the realization of passive damping is analyzed, including the comparison of characteristics between Rd damping circuit and Rd-Cd damping circuit. After that, the selection guide of damping parameters is put forward based on the analysis of circuit parametric effect on quality factor Q. Secondly, the research on attenuation of harmonics at switching frequency is carried out, for series LCtrap and shunt LCtrap filters, the effect of harmonic trap inductance and capacitance on trap filter bandwidth is analyzed. Finally, two types of filter structure including LCtrap-LC-RC and LC-RC-LCtrap are proposed, and the characteristics of the two filters are also analyzed. The simulative and experimental results show that the proposed filter of UPS(Uninterruptible Power Supply) can not only improve the output voltage waveform quality but also decrease its size and weight. |
| Key words: electric inverters passive damping active damping harmonic trap electric filters UPS |
