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Grid Impedance Impact Analysis of the Weak Grid-Tied VSC
2021 IEEE Green Technologies Conference (GreenTech), 2021The grid impedance is widely recognized as the key factor to the stability of the grid-tied power electronic devices. However, the influence of the grid impedance ratio is always neglected due to the assumption that grid reactance is much large than grid resistance.
Hong Hu +9 more
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Connection of inverters to a weak grid
2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018), 2002Connection of an inverter to export power to the mains for a stiff supply is well understood. This paper examines the dynamics of power export to a weak grid. In this case the local bus angle changes for changes in export power which interferes with the process of synthesizing the inverter voltage.
G. Ledwich, H. Sharma
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Structural Weaknesses in the Open Smart Grid Protocol
2015 10th International Conference on Availability, Reliability and Security, 2015The Open Smart Grid Protocol (OSGP) is currently deployed in various countries in large-scale Smart Metering projects. The protocol was developed by the OSGP Alliance and published as a standard by the European Telecommunications Standards Institute (ETSI).
Klaus Kursawe, Christiane Peters
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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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