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Wide-Band Impedance Measurement for converter impedance determination in LV-Grids
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| Author(s) |
Markus BIENHOLZ |
| Abstract |
Passive coupling devices are used to measure the impedances in the low-voltage utility grid in the frequencyrange from 2 kHz to 150 kHz. The impedance of the grid itself is found to be ohmic-inductive forfrequencies up to 50 kHz. The impedance of different converters is calculated from measurements. If theconverter is connected to the grid only through a choke its impedance is significantly larger than that ofthe grid at high frequencies and within the control bandwidth, in case the converters rated power is muchsmaller than that of the grid. If an EMI-filter is added the impedance at the point of common coupling isstrongly decreased for common and differential mode at frequencies starting as low as 20 kHz and 4 kHz. |
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| Filename: | 0034-epe2018-full-11045160.pdf |
| Filesize: | 369 KB |
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| Type |
Members Only |
| Date |
Last modified 2019-05-05 by System |
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