Determination of frequency stability border of power system to set the thresholds of under frequency load shedding relays

Amjady, Nima; Fallahi, Farzad

doi:10.1016/j.enconman.2010.02.016

Cited by 21 publications

(8 citation statements)

References 10 publications

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“…Due to its simplicity and accuracy, for simulation studies, we have used this model with the typical parameters given in Table 2 (Chang-Chien et al, 2012). Details regarding the SFR model have been presented in (Aik, 2006;Amjady & Fallahi, 2010). It should be mentioned that the aim of the proposed load shedding scheme is to maintain the minimum frequency (f min ) and the steady state frequency (f ss ) above 58.4 and 59.2 Hz, respectively.…”

Section: Simulation Resultsmentioning

confidence: 99%

Adaptive underfrequency load shedding using particle swarm optimization algorithm

Ketabi

Fini

2017

Journal of Applied Research and Technology

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Underfrequency load shedding plays an important role in prevention of the power system blackout. The common load shedding methods are based on measuring the frequency first derivative; therefore, an error in measurement process can highly affect their performance. Also, for proper performance of these load shedding schemes, the exact value of some parameters of power system is needed. Any error in estimation of these parameters reduces the reliability of these load shedding schemes. In this paper, an underfrequency load shedding method based on the forecast minimum frequency of system is proposed. In this method, the samples of the power system frequency are taken after disturbance; then, particle swarm optimization algorithm is used to forecast the minimum frequency based on these samples. To verify the effectiveness of the proposed load shedding scheme, its performance has been compared with a newly suggested method.

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Section: Simulation Resultsmentioning

confidence: 99%

Adaptive underfrequency load shedding using particle swarm optimization algorithm

Ketabi

Fini

2017

Journal of Applied Research and Technology

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“…The contribution of VI control combined with conventional control is studied under several test cases (i.e. cases [11][12][13][14][15][16][17][18] for the two test systems. Like DR control, the impacts of VI control on the sensitivity and stability of SFR depend upon the parameters of the CL systems.…”

Section: Controlmentioning

confidence: 99%

“…In the conventional power system, frequency regulation is achieved through spinning and non-spinning reserves during normal conditions and underfrequency load shedding (UFLS) is employed under contingency conditions to avoid larger black-outs. In [11], an analytical generalorder SFR model is developed which incorporates load shedding while in [12], an analytical approach is presented to determine the frequency stability border of the power system to set the thresholds of UFLS relays. Similarly, UFLS schemes based on classical control [13] and adaptive methods [14,15] are also proposed.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity and stability analysis of power system frequency response considering demand response and virtual inertia

Zaman

Bukhari

Haider

et al. 2020

IET Generation, Transmission & Distribution

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“…Frequency stability is the ability of the system to remain at a constant frequency, even if there is an imbalance between the load and generation in case the power system is exposed to a disturbance (Amjady & Fallahi, 2010). Deactivation of one or more of the synchronous machines or loads in the power system or the activation of a new energy source is caused to change in the system frequency.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Disruptive Effect on Voltage Stability Caused by Line Contingency in Power Systems and Improvement of System Stability

Uzun¹,

Pamuk²,

Taşkın³

2021

European Journal of Science and Technology

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There are many situations that cause voltage instability in power systems. One of these situations is line contingency that may occur in power systems. In this study, the effects of line contingency on the steady state are investigated in the IEEE 9 buses power system. Firstly, the static and dynamic analyses of the power system are made in normal operating condition. Continuous power flow analysis was used as static analysis and time domain simulation method were used as dynamic analysis. Then each transmission line is deactivated and the analyses are repeated. The changes in the maximum loading capacity and voltage stability of the system are investigated in case of each transmission line contingency. Finally, Static Var Compensator (SVC) is connected to the power system to improve the stability level. When the SVC is connected to the power system, the maximum loading capacity of the system is examined and the effects of this situation on the voltage stability are analyzed. All analyses are performed in the MATLAB® PSAT (Power System Analysis Toolbox). The results showed that the line contingency reduces the maximum loading capacity and deteriorates the voltage stability. It has been observed that both the problems can be eliminated with the SVC integration into the power system.

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Determination of frequency stability border of power system to set the thresholds of under frequency load shedding relays

Cited by 21 publications

References 10 publications

Adaptive underfrequency load shedding using particle swarm optimization algorithm

Adaptive underfrequency load shedding using particle swarm optimization algorithm

Sensitivity and stability analysis of power system frequency response considering demand response and virtual inertia

Investigation of Disruptive Effect on Voltage Stability Caused by Line Contingency in Power Systems and Improvement of System Stability

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