Analysis of intra-area and interarea oscillations in South-Eastern UCTE interconnection

Vournas, Costas; Metsiou, A.; Nomikos, B.M.

doi:10.1109/pes.2009.5275487

Cited by 13 publications

(4 citation statements)

References 5 publications

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“…Adaptive schemes only work when the operator can gather information in real time. In such cases where frequency prediction is necessary, wide-area measurement system (WAMS) can be an essential tool for transmission system operators (TSOs) in power system dynamic studies [14][15][16][17][18]. WAMS is based on the optical communication infrastructure and global positioning system (GPS), and can significantly contribute in assuring safe and reliable power system operation.…”

Section: Introductionmentioning

confidence: 99%

Wide-Area Measurement System-Based Optimal Multi-Stage Under-Frequency Load-Shedding in Interconnected Smart Power Systems Using Evolutionary Computing Techniques

et al. 2019

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Power systems that are known as the most complex systems encounter different types of disturbances and emergence events. To operate such systems in a stable mode, several control protection techniques are in need. Frequency plays a vital role in power systems and needs to be properly maintained in a permissible level. To this end, under-frequency load-shedding (UFLS) techniques are used to intercept the frequency decline when a system encounters a severe disturbance. In this paper, a novel, wide-area measurement system (WAMS)-based optimal UFLS technique is proposed. The system frequency response (SFR) model is identified online based on the real-time measurements collected by phasor measurement units (PMUs). Then, the SFR model is used to design a new optimal multi-stage UFLS scheme. Imperialist competitive algorithm (ICA), which is a powerful evolutionary computing method, is then adopted for solving the suggested multi-stage UFLS optimization problem. The applicability of the proposed method is shown on a practical test system. The effectiveness of the proposed optimal multi-stage UFLS scheme is verified by several simulation and comparison scenarios.

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Section: Introductionmentioning

confidence: 99%

Wide-Area Measurement System-Based Optimal Multi-Stage Under-Frequency Load-Shedding in Interconnected Smart Power Systems Using Evolutionary Computing Techniques

et al. 2019

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“…With the scaling up of electric power networks, system stability problems become more complex. Especially, the interconnection of power networks and the application of fast excitation systems make the low-frequency oscillations (LFOs) become more and more serious, which is a critical factor that influences the stable and efficient operation of power systems [1][2][3][4]. Up to now, power system stabilizers (PSSs) and flexible AC transmission systems (FACTS) device [5][6][7][8][9], which use local measured signals as feedback signals, such as rotor speed, active power, etc., are being used to damp LFOs.…”

Section: Introductionmentioning

confidence: 99%

Robust wide‐area damping controller design for inter‐area oscillations with signals' delay

Liu

et al. 2015

IEEJ Transactions Elec Engng

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A new wide-area damping control strategy is investigated for flexible AC transmission systems (FACTS) device using widearea measurement system (WAMS) signals. The purpose is to design a dynamic output wide-area damping controller (WADC) for improving the stability of interconnected power systems. The time-varying delay of wide-area signal is incorporated into the design process, which can effectively reduce the delay effect on the damping performance. First, a discrete-time plant model with time-varying delay is established for power systems; then by using the proposed improved free-weighting matrices (IFWMs) approach and a convex optimization algorithm, a new and less conservative delay-dependent stability criterion, expressed in the terms of linear matrix inequalities (LMIs), is obtained without ignoring any useful terms on the difference of a Lyapunov function. Detailed case studies on a 4-machine two-area benchmark test system and 16-machine five-area NETS-NYPS interconnected system show that the designed WADC can not only maintain effective damping performance under the condition of time-varying delay but also get the maximum wide-area time delay.

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“…Low frequency oscillations [1][2][3] have been reported in power systems all over world since 1960s. From then on, great attentions have been paid to the oscillations for the secure of power systems.…”

Section: Introductionmentioning

confidence: 99%

Research of the Mechanism of Low Frequency Oscillation Based on Dynamic Damping Effect

Liu¹,

Ge²,

Zhu³

et al. 2015

Journal of Electrical Engineering and Technology

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-For now, there are some low frequency oscillations in the power system which feature low frequency oscillation with positive damping and cannot be explained by traditional low frequency oscillation mechanisms. Concerning this issue, the dynamic damping effect is put forward on the basis of the power-angle curve and the study of damping torque in this article. That is, in the process of oscillation, damping will dynamically change and will be less than that of the stable operating point especially when the angle of the stable operating point and the oscillation amplitude are large. In a situation with weak damping, the damping may turn negative when the oscillation amplitude increases to a certain extent, which may result in an amplitude-increasing oscillation. Finally, the simulation of the two-machine two-area system verifies the arguments in this paper which may provide new ideas for the analysis and control of some unclear low frequency phenomena.

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Analysis of intra-area and interarea oscillations in South-Eastern UCTE interconnection

Cited by 13 publications

References 5 publications

Wide-Area Measurement System-Based Optimal Multi-Stage Under-Frequency Load-Shedding in Interconnected Smart Power Systems Using Evolutionary Computing Techniques

Wide-Area Measurement System-Based Optimal Multi-Stage Under-Frequency Load-Shedding in Interconnected Smart Power Systems Using Evolutionary Computing Techniques

Robust wide‐area damping controller design for inter‐area oscillations with signals' delay

Research of the Mechanism of Low Frequency Oscillation Based on Dynamic Damping Effect

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