An adaptive power-system stabiliser which cancels the negative damping torque of a synchronous generator

Gupta, D.P. Sen; Narahari, N.G.; Boyd, Ian M.; Hogg, B.W.

doi:10.1049/ip-c.1985.0023

Cited by 3 publications

(2 citation statements)

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“…The controllers AVR and PSS are just designed to avoid the appearance of negative damping. It has ever been a very hot topic to study these important controllers in power systems [11], e.g., an adaptive power system stabilizer which can cancel the negative damping torque of a synchronous generator was designed [12]. However, it is necessary to investigate these pure negative damping effect in the absence of these classical controllers.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

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Dynamics and Collapse in a Power System Model with Voltage Variation: The Damping Effect

Sun

Yuan

et al. 2016

PLoS ONE

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Complex nonlinear phenomena are investigated in a basic power system model of the single-machine-infinite-bus (SMIB) with a synchronous generator modeled by a classical third-order differential equation including both angle dynamics and voltage dynamics, the so-called flux decay equation. In contrast, for the second-order differential equation considering the angle dynamics only, it is the classical swing equation. Similarities and differences of the dynamics generated between the third-order model and the second-order one are studied. We mainly find that, for positive damping, these two models show quite similar behavior, namely, stable fixed point, stable limit cycle, and their coexistence for different parameters. However, for negative damping, the second-order system can only collapse, whereas for the third-order model, more complicated behavior may happen, such as stable fixed point, limit cycle, quasi-periodicity, and chaos. Interesting partial collapse phenomena for angle instability only and not for voltage instability are also found here, including collapse from quasi-periodicity and from chaos etc. These findings not only provide a basic physical picture for power system dynamics in the third-order model incorporating voltage dynamics, but also enable us a deeper understanding of the complex dynamical behavior and even leading to a design of oscillation damping in electric power systems.

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Section: Conclusion and Discussionmentioning

confidence: 99%

“…Its dynamics is dominated by the rotor motion, which can be represented by a well-known second-order differential equation in the simplest form, called the swing equation [3–12]. The explicit form of equation will be given subsequently.…”

Section: Introductionmentioning

confidence: 99%

Dynamics and Collapse in a Power System Model with Voltage Variation: The Damping Effect

Sun

Yuan

et al. 2016

PLoS ONE

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Assessing the effects of climate change on water quality of plateau deep-water lake - A study case of Hongfeng Lake

Longyang

2019

Science of The Total Environment

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Regional ecosystem health assessment using the GA-BPANN model: a case study of Yunnan Province, China

Liu

2022

Ecosyst Health Sustain

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Background: Regional ecosystem health assessments are the basis for the sustainable development of society. However, an ecosystem is a complex integration of ecosystem mosaics and subsystems that influence each other, making it difficult to evaluate them using traditional assessment methods of linear and explicit functions. We introduce a back-propagation neural network model optimized by a genetic algorithm to evaluate ecosystem health in 16 districts in Yunnan Province.Result: (1) The model required fewer inputs to evaluate complex and nonlinear systems, avoided the need for subjective weights, and performed well in this practical application to regional ecosystem health assessment. (2) The ecosystem health in Yunnan Province was increasing, and there was a significant positive spatial autocorrelation during 2000–2020, showing that districts with high Ecosystem Health cluster together and the ecological protection policy of the region has produced a diffusion effect, leading to continuous improvement of the ecological health of the surrounding areas. High-low outlier areas of ecosystem health should be paid more attention, because of the increasing instability of local health levels. Conclusion: This study provides a methodological exploration for assessing spatial mosaics of different ecosystems at a regional scale.

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An adaptive power-system stabiliser which cancels the negative damping torque of a synchronous generator

Cited by 3 publications

References 1 publication

Dynamics and Collapse in a Power System Model with Voltage Variation: The Damping Effect

Dynamics and Collapse in a Power System Model with Voltage Variation: The Damping Effect

Assessing the effects of climate change on water quality of plateau deep-water lake - A study case of Hongfeng Lake

Regional ecosystem health assessment using the GA-BPANN model: a case study of Yunnan Province, China

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