Results 51 to 60 of about 102,634 (167)
Zhongguo dianli, 2019 With the development of flexible DC technology, the construction of source-grid -load in distribution network is greatly enriched, and the new-type grid models become possible such as centralized photovoltaic DC grid-connection and DC power supply for ...
Zhaoxiang YANG +3 more
doaj +1 more source
Series Current Flow Controllers for DC Grids [PDF]
IEEE Access, 2019 Large-scale grid integration of renewables and cross-country border energy exchange may be facilitated by multi-terminal high-voltage direct-current (MTDC) grids. However, as the number of terminals and dc lines increases, power flow management may become a major challenge.
Senthooran Balasubramaniam +2 more
openaire +3 more sources
Coupling Characteristics and Construction Method of Single-AC Multi-DC Hybrid Grid
EnergiesIn regions with concentrated load centers in China, the AC transmission network is dense, leading to challenges such as difficulties in power flow control and excessive short-circuit currents.
Xingning Han +5 more
doaj +1 more source
Frontiers in Energy ResearchThis paper introduces an improved decentralized control strategy for a photovoltaic (PV) hybrid energy storage (HES) system (HESS) in a DC microgrid. The power sharing method of the HES system is discussed in depth.
Jianbiao Li +8 more
doaj +1 more source
IEEE Open Journal of Power ElectronicsThe dynamics and performance of low-inertia ac grids with frequency support (e.g., droop and virtual inertia controls) have been investigated thoroughly.
Ahmed M.E.I. Mohamad +2 more
doaj +1 more source
DC Offset Error Compensation Algorithm for PR Current Control of a Single-Phase Grid-Tied Inverter
Energies, 2018 In a single-phase grid-tied inverter, the direct current (DC) offset error included in the measured grid side phase current has various causes, such as a non-ideal current sensor, unbalanced power supply of an operational amplifier, and nonlinear ...
Jae Suk Lee, Seon-Hwan Hwang
doaj +1 more source
IEEE Access, 2020 Wind energy conversion systems (WECSs), based on permanent magnet synchronous generators (PMSGs), are becoming common sources in dc grids. However, in previous dc grids integration studies, turbine-generator mechanical dynamics are represented by a ...
Ahmed M. I. Mohamad +2 more
doaj +1 more source
Frontiers in Energy ResearchTo provide inertia support to the power grid, the grid side frontend DC/AC inverter of the bidirectional electric vehicle (EV) charging facilities can use the virtual synchronous generator (VSG) control in its grid-side DC/AC converter.
Yan Tian +6 more
doaj +1 more source
Coordinated Low-Voltage Ride-Through Control Strategy for Flywheel Energy Storage Systems
Applied SciencesTo address DC-link voltage fluctuation, active-power imbalance between the machine side and the grid side, and double-frequency distortion in the grid current of a flywheel energy storage system (FESS) under symmetrical and asymmetrical voltage sag ...
Dahai Guo +6 more
doaj +1 more source
Bipolar output direct‐coupled DC–DC converter applied to DC grids
The Journal of Engineering, 2018 The unipolar‐input bipolar‐output DC–DC converters with megawatt rating are the key equipment in the multi‐terminal HVDC and DC grids, especially in the DC wind farm. This paper presents a novel direct‐coupled transformerless DC–DC converter to interconnect unipolar DC system with bipolar DC transmission line based on cascaded sub‐modules.
Lingyu Guo +3 more
openaire +2 more sources