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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
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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
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IEEE Open Journal of Power ElectronicsThis paper evaluates the submodule capacitor current and voltage ripple of a direct three-phase to single-phase ac/ac MMC under unbalanced grid conditions.
Ygor Pereira Marca +3 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
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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
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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
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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. The method combines the features of two different energy operator schemes: the basic one for estimating the frequency of the grid voltages and the cross-energy operator for phase tracking. Using a
Nwobu, CJ, Nakiganda, AM, Zhang, L
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IET Power Electronics, 2021 Grid‐connected converters in distributed generation systems are required to operate under highly distorted voltage with a wide frequency range, and to provide active/reactive power information for ancillary services and power control. This paper presents
Sakda Somkun
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Research on Wind Turbine Converter Control Based on Resonant Sliding Film Controller [PDF]
E3S Web of Conferences, 2021 A resonant sliding mode control strategy based on the resonant sliding film surface is proposed to control the turbine-side converter of the wind turbine so that the wind turbine can be connected to the grid smoothly under the condition of unbalanced ...
Wen-kuan XU, You-peng ZHANG
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Voltage Profile Improvement in Unbalanced Distribution Grids by Sequential Quadratic Programming
2023 IEEE AFRICON, 2023 The implementation of renewable energy resources (RERs) such as photovoltaic (PV) units and wind turbines (WTs) has been intensively used on active distribution networks (ADNs) due to their significant environmental, technical, and economic benefits.
Bamatraf, M +3 more
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