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Small-signal modelling and stability assessment of phase-locked loops in weak grids
(MDPI AG, 2019)
This paper proposes a low-complexity small signal model for a 3-leg converter connected to a balanced three-phase, three-wire weak grid and synchronised to this grid using a PLL implemented in a synchronous rotating d-q ...
Análise da estabilidade de conversores conectados a redes elétricas com baixo SCR
(Universidade Federal de Santa MariaBrasilEngenharia ElétricaUFSMPrograma de Pós-Graduação em Engenharia ElétricaCentro de Tecnologia, 2021-07-22)
This Ph.D. thesis presents an analysis on the influence of the synchronism system
on three-phase converters connected to weak grid combining state space approaches
and matrix transfer functions. The generation system ...
UPQC implemented with Cascade Asymmetric Multilevel Converters
(Elsevier Science Sa, 2015-07)
The power quality (PQ) in distribution systems is affected by the pollution introduced by the customers. The Unified Power Quality Controller (UPQC) custom power device is the most integral actuator to improve the quality ...
Avaliação do desempenho de recursos energético distribuídos conectados à rede sob diferentes condições de impedância de rede
(Universidade Federal de Santa MariaBrasilEngenharia ElétricaUFSMPrograma de Pós-Graduação em Engenharia ElétricaCentro de Tecnologia, 2021-12-17)
This work aims to evaluate the performance of Distributed Energy Resources of Grid-Connected Photovoltaic Systems when inserted in different grid impedance conditions. For this purpose, first a brief literature review was ...
Power Production Losses Study by Frequency Regulation in Weak-Grid-Connected Utility-ScalePhotovoltaic Plants
(2016)
Nowadays, an increasing penetration of utility-scale photovoltaic plants (USPVPs) leads to a change in dynamic and operational characteristics of the power distribution system. USPVPs must help to maintain the system ...