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Voltage Weak DC Distribution Grids [PDF]
Electric Power Components and Systems, 2017 AbstractThis paper describes the behavior of voltage weak DC distribution systems. These systems have relatively small system capacitance. The size of system capacitance, which stores energy, has a considerable effect on the value of fault currents, control complexity, and system reliability.
Tsegay Gebremedhin Hailu +3 more
openaire +3 more sources
Frontiers in Energy Research, 2023 In response to the high uncertainty of large-scale new energy output in the electrical energy system (EES) and the weak controllability of energy output at multiple time scales, this paper proposes a weak grid identification model for transient energy ...
Shi Qiu +6 more
doaj +1 more source
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2022 Virtual synchronous generator (VSG) control technique is widely used for the grid-friendly integration of renewable energy. However, when VSG is attached to a weak grid, it is prone to voltage and frequency instability, which aggravates the voltage ...
Chang Li +4 more
semanticscholar +1 more source
Multi-terminal HVDC grids with inertia mimicry capability [PDF]
, 2016 The high-voltage multi-terminal dc (MTDC) systems are foreseen to experience an important development in the next years. Currently, they have appeared to be a prevailing technical and economical solution for harvesting offshore wind energy. In this study,
Gharehpetian, Gevorg B. +4 more
core +2 more sources
Impedance-compensated grid synchronisation for extending the stability range of weak grids with voltage source converters [PDF]
, 2016 This paper demonstrates how the range of stable power transfer in weak grids with voltage source converters (VSCs) can be extended by modifying the grid synchronisation mechanism of a conventional synchronous reference frame phase locked loop (PLL).
D'Arco, Salvatore +3 more
core +2 more sources
IEEE Access, 2023 Grid-connected inverters have a very significant role in the integration of renewable energy resources with utility grids. However, in recent studies, it is revealed that grid-connected inverters are vulnerable to instability when the nature of the grid ...
Tila Muhammad +7 more
semanticscholar +1 more source
IEEE Access, 2021 In this paper, a novel single-loop flatness-based controller (FBC) is proposed to control the grid-side current in a shunt converter connected to a weak grid through an LCL-filter.
Hassan Abdullah Khalid +4 more
doaj +1 more source
IEEE transactions on power electronics, 2022 Conventional vector current control scheme has been widely used in grid-connected inverter systems. However, it suffers from severe power limitation issues under weak grids. This article reveals that the coupling effect between the power delivery and the
Liangwei Huang +3 more
semanticscholar +1 more source
IEEE Access, 2022 This article presents a comprehensive comparison of three control strategies used for grid-following inverters (GFLIs). The first strategy is the phase-locked loop (PLL)-based vector current control (VCC), and the other two PLL-less controllers are the ...
Nabil Mohammed +2 more
doaj +1 more source
Impedance-Based High Frequency Resonance Analysis of DFIG System in Weak Grids [PDF]
, 2017 The impedance-based model of Doubly Fed Induction Generator (DFIG) systems, including the rotor part (Rotor Side Converter (RSC) and induction machine), and the grid part (Grid Side Converter (GSC) and its output filter), has been developed for analysis ...
Blaabjerg, Frede +2 more
core +2 more sources