Analysis of nonlinear modal interaction in stressed power systems with SVCs

2003 ◽  
Author(s):  
E. Barocio ◽  
A.R. Messina
Keyword(s):  
Power Systems ◽  
Modal Interaction ◽  
Nonlinear Modal Interaction

Nonlinear modal interaction in HVDC/AC power systems with DC power modulation

1996 ◽  
Vol 11 (4) ◽  
pp. 2011-2017 ◽  
Author(s):  
Y.-X. Ni ◽  
V. Vittal ◽  
W. Kliemann ◽  
A.A. Fouad
Keyword(s):  
Power Systems ◽  
Modal Interaction ◽  
Power Modulation ◽  
Dc Power ◽  
Ac Power ◽  
Nonlinear Modal Interaction

scholarly journals Fundamental Study of Oscillations in the Nigerian Power System

2021 ◽  
Author(s):  
Nnaemeka Sunday UGWUANYI ◽  
Uma Uzubi Uma ◽  
Arthur Obiora Ekwue
Keyword(s):  
Power Systems ◽  
Power System ◽  
Low Frequency ◽  
Modal Interaction ◽  
Modal Interactions ◽  
Fundamental Study ◽  
Power Stations ◽  
Nonlinear Modal Interaction ◽  
Stability Limits ◽  
Comprehensive Study

The power systems in developing countries are usually stressed and operated near their stability limits. Consequently, accurate sources of oscillations and their controls can present a challenge. This paper reports a comprehensive study of the oscillations in the Nigerian 48-bus power system. The dominant modes, sensitive locations for faults, and the most responsible generators were identified by modal analysis. Uniquely, the potential for nonlinear modal interaction of these modes was carefully investigated. The low-frequency modes identified are 1 Hz, 1.14 Hz, and 1.37 Hz, and they are associated mainly with the generators at Kainji, Afam, and Delta power stations. The results indicate the existence of inter-area phenomena and nonlinear modal interactions among these modes. Also, the analysis revealed that the generator at the Kainji power station is most affected by the nonlinear interactions.<br>

scholarly journals Fundamental Study of Oscillations in the Nigerian Power System

2021 ◽  
Author(s):  
Nnaemeka Sunday UGWUANYI ◽  
Uma Uzubi Uma ◽  
Arthur Obiora Ekwue
Keyword(s):  
Power Systems ◽  
Power System ◽  
Low Frequency ◽  
Modal Interaction ◽  
Modal Interactions ◽  
Fundamental Study ◽  
Power Stations ◽  
Nonlinear Modal Interaction ◽  
Stability Limits ◽  
Comprehensive Study

The power systems in developing countries are usually stressed and operated near their stability limits. Consequently, accurate sources of oscillations and their controls can present a challenge. This paper reports a comprehensive study of the oscillations in the Nigerian 48-bus power system. The dominant modes, sensitive locations for faults, and the most responsible generators were identified by modal analysis. Uniquely, the potential for nonlinear modal interaction of these modes was carefully investigated. The low-frequency modes identified are 1 Hz, 1.14 Hz, and 1.37 Hz, and they are associated mainly with the generators at Kainji, Afam, and Delta power stations. The results indicate the existence of inter-area phenomena and nonlinear modal interactions among these modes. Also, the analysis revealed that the generator at the Kainji power station is most affected by the nonlinear interactions.<br>

scholarly journals Converter-driven Stability Analysis of Power Systems Integrated with Hybrid Renewable Energy Sources

2021 ◽  
Author(s):  
Jianqiang Luo ◽  
Yiqing Zou ◽  
Siqi Bu
Keyword(s):  
Renewable Energy ◽  
Stability Analysis ◽  
Power Systems ◽  
Power System ◽  
Dynamic Models ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Power Electronic ◽  
Modal Interaction ◽  
Hybrid Renewable Energy

Various renewable energy sources such as wind power and photovoltaic (PV) have been increasingly integrated into the power system through power electronic converters in recent years. However, power electronic converter-driven stability issues under specific circumstances, for instance, modal resonances might deteriorate the dynamic performance of the power systems or even threaten the overall stability. In this paper, the integration impact of a hybrid renewable energy source (HRES) system on modal interaction and converter-driven stability is investigated in an IEEE 16-machine 68-bus power system. Firstly, an HRES system is introduced, which consists of full converter-based wind power generation (FCWG) and full converter-based photovoltaic generation (FCPV). The equivalent dynamic models of FCWG and FCPV are then established, followed by the linearized state-space modeling. On this basis, converter-driven stability analyses are performed to reveal the modal resonance mechanisms of the interconnected power systems and the modal interaction phenomenon. Additionally, time-domain simulations are conducted to verify effectiveness of dynamic models and support the converter-driven stability analysis results. To avoid detrimental modal resonances, an optimization strategy is further proposed by retuning the controller parameters of the HRES system. The overall results demonstrate the modal interaction effect between external AC power system and the HRES system and its various impacts on converter-driven stability.

scholarly journals Fast calculation of modal interaction in large power systems using spectral decompositions of Gramians

2018 ◽  
Vol 51 (28) ◽  
pp. 564-569
Author(s):  
Alexey B. Iskakov ◽  
Alexandr V. Lavrikov ◽  
Igor B. Yadykin
Keyword(s):  
Power Systems ◽  
Modal Interaction ◽  
Large Power ◽  
Fast Calculation ◽  
Spectral Decompositions
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