TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Adaptive Control of Grid-Connected Inverters Based on Real-Time Measurements of Grid Impedance: DQ-Domain Approach

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoIEEE Energy Conversion Congress and Expo
Sivut69-75
Sivumäärä7
DOI - pysyväislinkit
TilaJulkaistu - 7 marraskuuta 2017
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaIEEE ENERGY CONVERSION CONGRESS AND EXPOSITION -
Kesto: 1 tammikuuta 1900 → …

Conference

ConferenceIEEE ENERGY CONVERSION CONGRESS AND EXPOSITION
Ajanjakso1/01/00 → …

Tiivistelmä

The increasing use of grid-connected inverters to connect renewable energy sources to a power grid will have globally important effect on grid performance. A mismatch between the grid and inverter impedance may cause harmonic
resonances, which can lead to instability of the grid and disruption of inverter operation. The grid dynamics vary over time, so the inverter should adapt to the varying conditions to ensure system stability. Recent studies have presented online methods to adaptively control the grid-connected inverters in the sequence domain. This paper extends those previous studies, and presents
an online method to adaptively control the inverters in the dq domain. In the method, the grid impedance is measured online using a pseudo-random-binary-sequence (PRBS) injection and Fourier techniques. The inverter control parameters are then adaptively adjusted based on the measurements. This paper
presents experimental results based on a three-phase photovoltaic inverter using power hardware-in-the-loop (PHIL) setup.