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Design of a Wide-Band Low-Voltage Grid Impedance Analyzer
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| Author(s) |
Sandro GUENTER |
| Abstract |
In this paper the design and measurement results of a grid analysis and grid impedance measurementsystem are presented. The system is provided to measure the frequency dependent grid impedance indifferent PoCs to detect resonances and improve the power quality especially of grids with high amountof DERs. Moreover Active Filtering (AF) and reactive power feed-in are possible. It comprises alsomeasurement of the negative and zero sequence as well as of subharmonics. The design of the converteris discussed in detail, the chosen method of impedance measurement is explained briefly, calculationsfor the selection of the converter topology and the selection of power semiconductor devices are made.A special hysteresis current control for 3-level Active Neutral Point Clamped (ANPC) converters ispresented. Finally different measurement results are shown. These measurements of the grid impedanceinclude subsynchronous frequencies in the range of 0.1 Hz to 30 Hz and frequencies in the range of70 Hz to 10 kHz as well as measurements of the negative sequence and the zero sequence impedance ofdifferent low voltage grids. |
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| Filename: | 0628-epe2016-full-09102043.pdf |
| Filesize: | 2.681 MB |
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| Type |
Members Only |
| Date |
Last modified 2017-04-13 by System |
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