Abstrakti
Grid impedance presents an important factor in controlling and analyzing the stability of various grid-connected systems. Since the grid impedance usually varies over time and with grid operation conditions, online measurement is required for adaptive control of grid-connected resources such as wind, solar, and energy storage. This is usually achieved by injecting an impulse current using a grid-connected inverter and using Fourier analysis to extract the corresponding frequency components in both the injected current and the resulting grid voltage response. Critical factors that affect the accuracy of such methods include the wave shape and magnitude of injection, amplitude of the grid impedance, data acquisition and post-processing methods. Different techniques are evaluated in this work and compared for online application under both strong and weak grid conditions.
Alkuperäiskieli | Englanti |
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Otsikko | Annual Conference of Center for Future Energy Systems |
Tila | Julkaistu - 24 tammik. 2013 |
OKM-julkaisutyyppi | B3 Vertaisarvioimaton artikkeli konferenssijulkaisussa |