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PWM-CONTROLLED DRIVES REDUCE NETWORK HARMONIC DISTORTION
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| Author(s) |
P. Büchner; Th. Eulitz; S. Baumann |
| Abstract |
Electric drives are more and more confronted with stronger national and international limitations of power quality, which is the key to guarantee the energetic electromagnetic compatibility and efficiency of distribution networks. Considering drives with a constant dc-voltage link, a mains-friendly drive can be designed using PWM inverters on both sides of the link. The primary PWM converter combines several different tasks: to convert threephase active power into dc-power of a constant voltage, to compensate reactive power dynamically at the point of coupling and to reduce network harmonic distortion of the coupling voltage up to a frequency less than half of the pulse frequency. The paper introduces a control strategy with several separate controllers in parallel for each lower harmonic acting in a synchronously rotating coordinate system. The behavior of the current component control and harmonics control depend on the varying network configuration and has to be optimized. Simulation results demonstrate how the proposed control strategy function and show some results of active filtering and reactive power compensation. |
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| Filename: | Unnamed file |
| Filesize: | 3.596 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-08-06 by System |
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