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Inertia Emulation Through Supercapacitor for a Weak Grid [PDF]
IEEE Access, 2021 Renewable energy sources (RES) have been widely incorporated into the power generation to offset fossil fuels in order to minimize carbon emissions.
Ratnam Kamala Sarojini +1 more
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An improving control strategy for grid -connected current in weak grid [PDF]
E3S Web of Conferences, 2021 The traditional proportional feedforward control strategy can suppress the low order harmonics in the strong power grid, but in the weak power grid environment, the grid impedance will have an adverse impact on the stability of the system, resulting in ...
Songyuan Deng, Xia Zhao
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Active Damping Adaptive Controller for Grid-Connected Inverter Under Weak Grid [PDF]
IEEE Access, 2021 The stability of grid-connected inverters is very sensitive to varying grid impedance, especially in the weak grid condition. In this paper, based on the Lyapunov method and with the micro-grid impedance identification, an active damping adaptive control
Hong Li +4 more
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Dynamic Stability Study of Grid-Connected Inverter Based on Virtual Synchronizer under Weak Grid [PDF]
Energies, 2022 The power grid has the characteristics of a weak grid with an increase in new energy penetration in the power system. Power electronic-based renewable generation brings issues that weaken the entire system, including the loss of inertia.
Yinghui Li +4 more
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Adaptive PI + VPI Harmonic Current Compensation Strategy under Weak Grid Conditions [PDF]
Applied Sciences, 2023 With the increase of the penetration rate of renewable energy power generation in the power system, the power grid gradually tends to be weak. Under the scenario of nonlinear load connecting to weak power grid, the grid-side voltage will produce ...
Lili Zhou, Wei Han, Jia Qi, Zhen Zhou
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Comprehensive modeling of grid-connected inverters in weak grid systems
Electrical engineering & ElectromechanicsIntroduction. The stability of grid-connected inverters is critical for the integration of renewable energy into modern power systems. However, this stability is significantly challenged under weak grid conditions, characterized by high impedance and low
Y. Daili +3 more
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Tuning Method of a Grid-Following Converter for the Extremely-Weak-Grid Connection [PDF]
IEEE Transactions on Power Systems, 2022 This paper proves that a grid-following converter can stably connect to a weak grid even short-circuit ratio (SCR) is 1. Root instability causes of this grid-following control are identified including fast control response, insufficient damping, and slow voltage support.
Chuanyue Li, Sheng Wang, Jun Liang
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A Robust Method for Controlling Grid-Connected Inverters in Weak Grids
IEEE Transactions on Circuits and Systems II: Express Briefs, 2021 Stable operation of grid-connected converters with the LCL filter is essential. Variations of the grid impedance and consequently, variations of the resonance frequency, can push the system toward instability. Also, delay that comes from sampling and PWM, could worsen the stability condition.
Ali Akhavan +2 more
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Frontiers in Energy Research, 2023 With the sustained popularity of renewable energy generation, high penetration of variable energies, e.g., wind and solar, is reshaping the form of power systems and weakening the strength of the grid.
Zhi Xu +10 more
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Current-Harmonic-Based Active Damping Strategy
Zhongguo dianli, 2023 The voltage-harmonic-based active damping control (VHBAD) can improve the adaptability of the converter to the weak grid, but it will weaken the suppression ability of background harmonic voltage disturbance and affect the quality of grid-connected ...
Jia XU, Shude YANG, Xinwen ZHANG
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