p>The integration of photovoltaic (PV) systems into weak-grid environments presents unique challenges to the stability of grid-connected inverters. This review provides a comprehensive overview of the research efforts focused on investigating the stability of PV grid-connected inverters that operate under weak grid conditions.
However, in the weak grid case, the grid voltage feedforward control introduces an additional feedback loop related to the grid impedance, which drastically reduces the phase angle margin of the grid-connected inverter and poses a serious threat to the quality and stability of the grid-connected current of the grid-connected inverter.
Although the voltage feedforward control based on the point of common coupling (PCC) has been widely studied in the grid-connected inverters to suppress the harmonics in the grid current, harmonic instability still occurs when the PCC voltage contains a series of background harmonics under weak grid condition.
In the study of Yang, a feedforward function of grid voltage is constructed that can totally remove the impact of PLL on the system''s output impedance, after which a grid-connected inverter''s impedance reshaping control approach based on grid voltage feedforward is suggested.
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In addition, the proposed control strategy allows determining the virtual impedance parameters by using the root locus method, so as to achieve the purpose of improving the …
<p>The integration of photovoltaic (PV) systems into weak-grid environments presents unique challenges to the stability of grid-connected inverters. This review provides a comprehensive …
Article Open access Published: 14 December 2025 Grid resilience enhancement of photovoltaic systems via Lyapunov-validated active–reactive power coordination and inverter …
In weak grid, feedforward of grid voltage control is widely used to effectively suppress grid-side current distortion of inverters caused by harmonics in point of common …
In weak grid, feedforward of grid voltage control is widely used to effectively suppress grid-side current distortion of inverters caused by …
In addition, the proposed control strategy allows determining the virtual impedance parameters by using the root locus method, so as …
Low power grid-connected inverters using L-type filters have the advantages of simple structures. However, due to the weak suppression of higher harmonics and the fact that …
This comprehensive review examines grid-connected inverter technologies from 2020 to 2025, revealing critical insights that fundamentally challenge industry assumptions …
Abstract. With the development of energy generation technology, In today''s weak grid environment, the research on the stability of grid-connected inverters is becoming more and …
The grid voltage is used instead of the PCC voltage for feedforward, and the synchronous data of grid voltage is obtained through PMU, which enables the grid-connected …
The integration of photovoltaic (PV) systems into weak-grid environments presents unique challenges to the stability of grid-connected inverters. This review provides a …
In weak grid, feedforward of grid voltage control is widely used to effectively suppress grid-side current distortion of inverters caused by harmonics in point of common …
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