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Compensation of Buck PWM Rectifier Input Current Harmonics Caused by Distorted Line Voltages
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| Author(s) |
J. Matulka; J. Ribkowski; R. Barlik; M. Nowak |
| Abstract |
The paper discusses certain aspects of the PWM line current type rectifier control. The capacitors present on the line side together with line and input chokes inductance create an oscillating circuit. Its second order transfer function gains current harmonics existing in the supply line voltage – specially those which are close to filter resonant frequency. In previous papers methods of damping of the excited oscillations has been proposed but if the line voltage contains harmonics the input current also has to be distorted respectively to LC filter transfer function. The control method proposed in the paper, designed for line PWM buck converter, ensures elimination of low order line current harmonics caused by voltage distortion. The results obtained by simulations confirm positive features of the method with regard to one and three-phase converters. Laboratory investigations done with an IGBT 10 kVA three phase converter also gave positive results respective to the high dynamic control structure implemented in DSP. |
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| Filename: | EPE-PEMC2002 - T3-027 - Matulka.pdf |
| Filesize: | 924.4 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-05-13 by System |
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