Effect of Doubly Fed Induction GeneratorTidal Current Turbines on Stability of a Distribution Grid under Unbalanced Voltage Conditions [PDF]
Energies, 2017 This paper analyses the effects of doubly fed induction generator (DFIG) tidal current turbines on a distribution grid under unbalanced voltage conditions of the grid.
Dahai Zhang +5 more
doaj +4 more sources
Balance control of grid currents for UPQC under unbalanced loads based on matching-ratio compensation algorithm [PDF]
Journal of Modern Power Systems and Clean Energy, 2018 In three-phase four-wire systems, unbalanced loads can cause grid currents to be unbalanced, and this may cause the neutral point potential on the grid side to shift.
Xiaojun ZHAO +5 more
doaj +3 more sources
Grid Voltage Synchronization for Unbalanced Voltages Using the Energy Operator [PDF]
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2017 This paper presents a novel synchronization technique which can identify the grid voltage frequency and phase angle under unbalanced grid voltage conditions.
Nakiganda, AM, Nwobu, CJ, Zhang, L
core +3 more sources
Synchronous Power Control of Grid-Connected Power Converters under Asymmetrical Grid Fault [PDF]
Energies, 2017 Control of grid-connected power converters is continuously developing to meet the grid codes, according to which the generation units should keep connected to the grid and further provide ancillary services, such as voltage and frequency support ...
Weiyi Zhang +3 more
doaj +3 more sources
Unbalanced Voltage Compensation Using Grid-Connected Photovoltaic System [PDF]
AUT Journal of Electrical Engineering, 2022 Appropriate power quality is indispensable for electrical distribution networks, especially in microgrids including renewable energy sources. One of the critical issues affecting power quality is the unbalanced voltage.
Alireza Mohammadi +2 more
doaj +2 more sources
Improved Voltage Support Method for Unbalanced Grid Condition [PDF]
Dianli jianshe[Objective] With the integration of large-scale distributed photovoltaics，issues such as reverse power flow and overvoltage arise，posing challenges to the safe and stable operation of power systems.
CAO Xiaoqing, LI Te, LI Lin, CHEN Di, ZHOU Zhengxu, SHI Xiaojie
doaj +2 more sources
Flexible operation of parallel grid-connecting converters under unbalanced grid voltage [PDF]
2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), 2017 According to the European grid code, grid-connecting converters should always be connected to the grid under grid voltage unbalance. However, grid voltage unbalance severely affects the stable operation of the converters and leads to the various power issues, such as active power oscillation, DC-link voltage ripple, and overloading.
Lu, Jinghang +2 more
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Power and Current Limiting Control of Wind Turbines Based on PMSG Under Unbalanced Grid Voltage
IEEE Access, 2021 Unbalanced grid voltage sags are the severe challenge for wind power generation system which connected to the grid successfully. The dc bus voltage and output power will fluctuate under unbalanced grid voltage. Moreover, the voltage sags will lead to the
Jun Liu, Chencong Zhao, Zhouhua Xie
doaj +1 more source
Improved control of virtual synchronous generator under unbalance of grid voltage
Energy Reports, 2023 Asymmetric faults in the power grid will lead to unbalanced grid voltage. When the traditional VSG control operates under unbalanced grid voltage, the output current will be unbalanced, resulting in output power oscillation.
Chunxue Wen +3 more
doaj +1 more source
IEEE Access, 2020 To improve the fault-tolerant operation capability of bidirectional voltage source converter (BVSC), an improved model predictive current control (IMPCC) for fault-tolerant BVSC, is proposed with balanced DC-link capacitor voltage under unbalanced grid ...
Shiyang Hu +3 more
doaj +1 more source