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1

Problematyka stabilności kątowej morskich systemów elektroenergetycznych

Robak S., Piekarz M.

Przegląd Elektrotechniczny

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2015

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R. 91, nr 10

278-283

PL

W artykule zostały omówione zagadnienia dotyczące morskich systemów elektroenergetycznych ze szczególnym uwzględnieniem kwestii stabilności kątowej. Omówiono zasadnicze elementy wchodzące w skład typowych morskich systemów elektroenergetycznych: źródła wytwórcze, odbiory mocy, sieci elektroenergetyczne. Przedstawiono główne czynniki mające wpływ na stabilność morskich systemów elektroenergetycznych. Rozważanie teoretyczne uzupełniono o przykładowe wyniki badań stabilności kątowej lokalnej, bazujące na analizie wartości własnych.

EN

The paper discusses the issues related to the offshore power systems, particularly regarding to rotor angle stability. Main offshore power systems components: generating units, power load, transmission network, have been described and characterized. The paper shows the important factors that affecting stability of the offshore power systems. Theoretical considerations were supplemented with results of rotor angle stability study based on eigenvalues analysis.

2

Efficient Generator Tripping Approach with Minimum Generation Curtailment based on Fuzzy System Rotor Angle Prediction

Baydokhty M.E., Eidiani M., Zeynal H., Torkamani H., Mortazavi H.

Przegląd Elektrotechniczny

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2012

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R. 88, nr 9a

266-271

EN

In this paper the transient stability of power system is improved by development of an efficient generator tripping approach. Tripping number of generators is one of the most-used technique at when a serious disturbance lurching the steady sate operation of the power system. Traditional generator tripping techniques suffered from over-tripping generators beyond the stability requirements. The instability in the power system is usually followed by some delay to be detected by the system which has been unclear for traditional tripping approaches, resulting in misscommitment of tripping generators or unnecessary tripping. As a remedy to this, fuzzy system based rotor angle prediction is proposed to study the behavior of the fault before when the instability detected by the system. However, fuzzy system prediction has an impressive performance on nonlinear systems on which the rotor angle attitude is utterly an identical case with nonlinear characteristics. Results obtained by various and practical simulations exhibit that the stability index of the system improved by less number of tripped generators at the proper time. Simulations are conducted by MATLAB and DIgSILENT software on a 9- bus system with 3 generators to demonstrate the promised results.

PL

Przedstawiono metodę poprawy stanów przejściowych i stabilności system energetycznego przez ulepszenie wyzwalanie generatora. Dla poprawy jakości tego załączania zastosowano układ logiki rozmytej bazujący na przewidywaniu kąta wirnika.

3

Non-linear excitation and governor control: a comparison of control schemes.

Iyer A.

Systems Science

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2000

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Vol. 26, nr 2

55-68

EN

Modem microprocessor capabilities permit the control designer to consider using relatively complicated nonlinear control algorithms, which would have been considered impractical in the past. In the paper inverse control and variable structure control are applied to the design of excitation and governor controllers using state variable feedback. The paper presents the results of a study of the two non-linear techniques for the design of excitation and governor controllers for a multi-machine power system. Control laws for rotor angle and field flux are derived. The closed loop system is shown to be asymptotically stable. The system can be transferred to a new operating condition corresponding to any desired terminal voltage V/sub t/ and tie-line power P/sub tie/.