28º Seminario Anual de Automática, Electrónica industrial e Instrumentación - SAAEI 2021, Ciudad Real (Spain) Online. 07-09 julio 2021
Summary:
Research into doubly-fed induction generator (DFIG) technology has yet to solve the instability that arises when DFIGs are connected to weak grids. To investigate this problem, this work used the modal analysis technique to study the impact of the phase-locked loop (PLL) control on the small-signal stability of wind-driven DFIGs and examine the sensitivity to the grid-impedance. Using a highly-detailed model, this study explains how stability can be guaranteed in terms of the ratio between the bandwidth of generator current controllers and the bandwidth of the phase-locked loop controller. Finally, the study provides practical recommendations for PLL design, based on the research findings.
Spanish layman's summary:
Este trabajo estudia el impacto del phase-locked loop (PLL) en la estabilidad de pequeña señal de los generadores de inducción doblemente alimentados (DFIGs) usando técnicas de análisis modal, teniendo en cuenta la impedancia de conexión de red, mediante el uso de un modelo electromagnético (EMT).
English layman's summary:
This work used the modal analysis technique to study the impact of the phase-locked loop (PLL) control on the small-signal stability of wind-driven doubly-fed induction generator (DFIGs) and examine the sensitivity to the grid-impedance, Using a highly-detailed model (EMT).
Keywords: Wind generators, doubly fed induction generators, phase locked loop, modal analysis, eigenvalues.
Publication date: July 2021.
Citation:
Ávila-Martínez, R., Rouco, L., García-Aguilar, J., Renedo, J., Sigrist, L., García-Cerrada, A., Impact of PLL control on small-signal stability of wind DFIGs connected to weak grids, 28º Seminario Anual de Automática, Electrónica industrial e Instrumentación - SAAEI 2021, Ciudad Real (Spain) Online. 07-09 July 2021.
IIT-21-079C
