Wind farms generation limits and its impact in real-time voltage stability assessment

Perez, Angel; Jóhannsson, Hjörtur; Østergaard, Jacob

doi:10.1109/ptc.2015.7232771

Cited by 7 publications

(12 citation statements)

References 10 publications

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“…This paper is an extension of the methods developed in [5][6][7][8][9], Fig. 1 offers an overview of the adaptations that are suggested in this work, in order to take into account the variability of the wind in the real-time stability assessment.The proposed algorithms is the following:…”

Section: A Proposed Methods Overview and Contributionmentioning

confidence: 99%

“…In this paper, the used wind speeds are produced from a simulation described in section III-A. • Use the forecasted value to estimate the maximum power available in the selected time horizon, in order to estimate the new Thévenin equivalent considering the generators limits by using the methods described in [7,9]. • Use the uncertainty of the produced forecast to evaluate the impact of the variability of the wind speed on the volt- age stability index by using the methodology developed in [6].…”

Section: A Proposed Methods Overview and Contributionmentioning

confidence: 99%

“…It is expected that a higher percentage of power generation will come from wind energy in Denmark [1] and its variability will impose challenges in the power system control and stability, where some of those concerns are aimed to be addressed by the SOSPO project 1 . For this purpose, a set of algorithms have been developed to produce a fast stability assessment, in real-time, by using PMU (Phasor Measurement Units) and wide-are information [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…In the specific case of voltage stability, two methods were identified as suitable for real-time assessment [5]: sensitivities and Thévenin Equivalent methods, and a review of existent approaches can be found in [11]. The real-time voltage stability assessment in this paper is based on Thévenin equivalent method [2,5,11], which offers advantages in its computational complexity [5] and its element-wise nature is used to consider the limits in the generators as described in [6]; the improvements described in [9] make it suitable for considering wind farms limits.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Considering wind speed variability in real-time voltage stability assessment using Thévenin equivalent methods

Perez

Karatas

Jóhannsson

et al. 2017

2017 IEEE Manchester PowerTech

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In this paper, wind speed models are used to consider its variability in real-time voltage stability assessment using Thévenin equivalent methods. A stochastic differential equation was used to produce a set of wind speeds required for the simulation scenarios together with a very short-term forecast based on a probabilistic method, which provides the means for including anticipation in the stability assessment. This is achieved by representing the variation in the wind as an uncertainty in the Thévenin equivalent parameters, which are used for wide-area assessment, and studying corresponding changes in the stability boundary for a specific time horizon. The methodology was tested with time domain simulation a cigré benchmark system for network integrations of renewables, where the approach successfully represented the final Thévenin Equivalent parameters with a maximum error of 2.5% of the estimated variables, for a time horizon of 1 minute in the used forecast.

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Section: A Proposed Methods Overview and Contributionmentioning

confidence: 99%

Section: A Proposed Methods Overview and Contributionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Considering wind speed variability in real-time voltage stability assessment using Thévenin equivalent methods

Perez

Karatas

Jóhannsson

et al. 2017

2017 IEEE Manchester PowerTech

Self Cite

View full text Add to dashboard Cite

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“…In [1] a method is presented for real-time assessment of aperiodic small-signal rotor angle (ASSRA) stability, based on algebraically derived expressions for critical stability boundaries [2] which laid the foundation for assessment of large systems in matter of milliseconds [3]. Online sensitivity based voltage stability assessment was presented in [4][5] while extensions to Thevenin impedance based assessment were presented in [6][7][8]. New approach for static security assessment in real-time is reported in [9][10].…”

Section: Introductionmentioning

confidence: 99%

Real-Time Early Warning and Early Prevention System to Avoid System Blackouts

Jóhannsson

2018

2018 IEEE Power &Amp; Energy Society General Meeting (PESGM)

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This paper presents a real-time early warning and early prevention (EWEP) system which objective is to avoid the occurrence of large scale system blackouts. The EWEP is obtained by combining a state-of-the-art methods for online stability assessment and for identifying effective counteractions into a single operational solution. The EWEP system was implemented on state-of-the-art software platform for applications of wide-area data. The EWEP system's performance was tested on synthetic wide-area measurement snapshots obtained by accurate time domain simulation of the 2003 blackout in Denmark and Sweden. The test results show that the system could automatically provide both an early warning for the blackout and efficiently determine effective countermeasures that would have avoided the blackout from occurring.

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