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A Modified LLCL-filter with the Reduced Conducted EMI Noise
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| Author(s) |
Weimin WU, Yunjie SUN, Zhe LIN, Frede BLAABJERG, Shu Hung Henry CHUNG, Min HUANG |
| Abstract |
For a transformerless grid-tied converter using Pulse Width Modulation (PWM), the harmonics of grid-injected current, the leakage current and the Electromagnetic Interference (EMI) noise are three important issues during design of the output filter. In this paper, the Common-Mode (CM) and the Differential-Mode (DM) EMI noises are investigated for the LCL- and LLCL-filters based single-phase full-bridge grid-tied inverter. Based on this, a modified LLCL-filter topology is proposed to provide enough attenuation on the conducted EMI noise as well as to reduce the DC-side leakage current. The parameter design method of the filter is also developed. The comparative analysis and discussion on four filter cases (the conventional LCL-filter, the conventional LLCL-filter, the modified LCL-filter, and the modified LLCL-filter) are carried out and verified through simulations and experiments on a 0.5 kW, 110 V / 50 Hz single-phase full-bridge grid-tied inverter prototype. |
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| Filename: | 0581-epe2013-full-17320531.pdf |
| Filesize: | 1.008 MB |
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| Type |
Members Only |
| Date |
Last modified 2014-02-09 by System |
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