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Grid Integration of Renewable Energy Sources into Weak Grids
2022This dissertation investigates the grid integration of converter-based renewable energy sources (RESs) into weak grids. For this purpose, a grid-following inverter (GFLI) is chosen as the RES, and its stability is analyzed. Additionally, the thesis proposes a method for the stability enhancement of the GFLI.
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The Resonance Suppression for Parallel Photovoltaic Grid-connected Inverters in Weak Grid
International Journal of Automation and Computing, 2017Obvious resonance peak will be generated when parallel photovoltaic grid-connected inverters are connected to the weak grid with high grid impedance, which seriously affects the stability of grid-connected operation of the photovoltaic system.To overcome the problems mentioned above, the mathematical model of the parallel photovoltaic inverters is ...
Qiu-Xia Yang +3 more
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Model Predictive Control of Grid Side Converter in The Weak Grid
2019 IEEE International Symposium on Predictive Control of Electrical Drives and Power Electronics (PRECEDE), 2019The grid side converter (GSC) needs proper controller design when connected to the weak grid, otherwise it becomes unstable due to the overlook of grid impedance dynamic. Although the phase locked loop (PLL) will cause the instability of the interconnected system that consists of GSC and inductive grid due to its negative damping characteristic, the ...
Liang Chen +4 more
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Harmonic compensation method of grid-tied converters in a weak grid
2017 Chinese Automation Congress (CAC), 2017In this paper, a control strategy is proposed to compensate the voltage of point of common coupling (PCC) voltage and grid current harmonic by using line end grid connected inverter. The control strategy uses the current and voltage information at the outlet of the inverter and indirectly calculates the voltage at the PCC in conjunction with the ...
Deng Hua +5 more
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Stability Analysis of Grid-Connected Inverter in Weak Grid Systems
Advanced Materials Research, 2012Distributed Generation may be located far away from load centers due to their use of new energy resource distribution characteristics. In this case, Long distance transmission lines will introduce an equivalent impedance to the grid, so that the grid showing the characteristics of a weak grid.
Xin Chen, Chun Yin Gong, Lin Cheng
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Regulator reconstruction strategy of grid-connected inverter in weak grid
2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia), 2016In order to suppress LCL inherent resonance and grid background harmonic problems, virtual impedance control based on capacitor current feedback and grid voltage feedforward control strategies are typically introduced in grid-connected inverters. However, the inverter control strategy can't make the system operate stably in a weak grid.
null Qinglin Zhao +4 more
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Synchronous condenser applications for a weak grid
2023This panel session discusses the application of synchronous condensers to improve power system performance, particularly systems with a high proportion of inverter based sources. Presentations in this panel session: - Introduction to panel: Update on SynCon Interest Group Activity (23PESGM4014) - SynCon parameter study: Different transient and sub ...
K. Chen +4 more
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Research on Self-synchronization Strategy of Grid-connected Inverters in Weak Power Grid
IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, 2020In order to ensure good power quality, the grid-connected inverter mostly uses phase-locked loop (PLL) to maintain synchronization with large power grid. But the PLL will cause a negative-impact on the stability of grid-connected inverter under weak grids. The paper analyzes the equivalent impedance of the PLL under the weak grid firstly.
Xuemei Zheng +2 more
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Stability Control for Wind in Weak Grids
IEEE Transactions on Sustainable Energy, 20194 Hz oscillations and 30 Hz oscillations have been observed in real-world wind farms with weak grid interconnections. Such stability issues limit wind power delivery. This paper proposes mechanism-based feedback control strategies suitable for vector control based voltage source converters employed in Type-3 and Type-4 wind to enhance the overall ...
Yin Li, Lingling Fan, Zhixin Miao
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Control of Grid-Tied Inverter with L Filter in Weak Grid Considering Grid Impedance and Harmonics
IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018Inductor filter is widely used in grid-tied inverters. If an inverter with inductor filter operates in weak grid condition, voltage measurement error may exist due to the voltage sensor delay and the voltage drop on grid impedance. This can further lead to errors in the phase lock loop (PLL) and even system instability.
Hao Tu +5 more
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