Adaptive scheme for local prediction of post-contingency power system frequency

Alizadeh, Mohammad; Amraee, Turaj

doi:10.1016/j.epsr.2013.10.014

Cited by 17 publications

(13 citation statements)

References 18 publications

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“…In adaptive schemes, the relay decision is made only on the basis of ROCOF. An adaptive under frequency load shedding scheme should possess the following characteristics that is, predicting the magnitude of disturbances, localization of that disturbance, derivation and distribution of the control action 43 . Various researchers have worked to form an adaptive protection scheme based on UFLS relays.…”

Section: Sips Applicationsmentioning

confidence: 99%

Recent trends in integrity protection of power system: A literature review

Rajalwal

Ghosh

2020

Int Trans Electr Energ Syst

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Background: An increase in the load demand has been forcing the electrical components to work near their allowable limits. The transformation of the power system in terms of technology and geographical stretch has imposed the necessity of employing advanced protection schemes in the system. The system integrity protection scheme (SIPS) has evolved as an effective measure with the gradual sprawl of the conventional grid with local measurements to a smart grid with wide-area measurement system. Aims: SIPS is a rapidly growing field in the power system and thus the study of its performance analysis, implementation methods, and applications is necessary. This paper provides a comprehensive overview of SIPS technology. Materials & Methods: In this paper, SIPS definition and classification are briefly discussed. SIPS normalization schemes that include load shedding, controlled islanding, generation rejection, ou-of-step prediction, relay settings are elaborated. To implement these normalization schemes, various methods such as index-based, optimization-based, WAMS based, EAC based, and ML-based are discussed and compared. Finally, a comparative assessment is framed based on SIPS applied for different power system issues such as transient instability, voltage instability, overloading, line contingency, protection security, etc. Results: It is observed that most of the proposed SIPS are implemented for improving transient stability. The preferred solution for implementing the SIPS by the researchers is load shedding. It is also observed that there is a lack of implementation of SIPS with renewable energy systems.

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Section: Sips Applicationsmentioning

confidence: 99%

Recent trends in integrity protection of power system: A literature review

Rajalwal

Ghosh

2020

Int Trans Electr Energ Syst

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“…where timer snd is the timer amount after LS step s, time step n, and disturbance d. According to (13), binary variable u snd takes 1 if the time elapsed in load shedding step s has exceeded the specified delay time t s . UFLS relays operate once in each LS step.…”

Section: Minimizing Expected Amount Of Lsmentioning

confidence: 99%

“…A mixed‐integer linear programming (MILP) has been developed for minimizing the amount of LS after disturbances with optimal setting of the UFLS relays in Ceja‐Gomez et al In Chang et al regression tree method has been implemented for predicting the frequency deviation following a generator loss. The artificial neutral network (ANN) and support vector regression methods have been also applied for prediction of power system frequency response after disturbance occurrence . The power system frequency has been predicted using the online data obtained from phasor measurement units after disturbance occurs, and then, a LS method has been proposed .…”

Section: Introductionmentioning

confidence: 99%

“…The artificial neutral network (ANN) and support vector regression methods have been also applied for prediction of power system frequency response after disturbance occurrence. 13 The power system frequency has been predicted using the online data obtained from phasor measurement units after disturbance occurs, and then, a LS method has been proposed. 14 Genetic algorithm has been used to determine the optimal setting of UFLS relays with the aim of minimizing the LS amount.…”

Section: Introductionmentioning

confidence: 99%

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Multiobjective optimal setting for UFLS relays considering voltage deviation

Alizadeh

Jafari‐Nokandi

Amraee

2018

Int Trans Electr Energ Syst

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Summary The postdisturbance power imbalance causes the power system frequency to drop. For preventing the frequency drop below the safe range, under frequency load shedding (UFLS) plan should be used by applying UFLS relays. In this paper, the conventional multistage UFLS plan is promoted via a linearized AC power flow model. A multiobjective mixed‐integer linear program is solved in order to minimize the load shedding amount and voltage deviation simultaneously. The proposed method simultaneously benefits from individual UFLS and under voltage LS (UVLS) features which may operate in the power system without coordination. The proposed method has been implemented in IEEE 39‐bus test system, and the results are presented under different scenarios. The results show that the proposed model for locating UFLS relays and their optimal setting can maintain both the system frequency and bus voltages in the secure operating limits.

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“…The use of Artificial Intelligence in power system stability analysis is an active research area that has received significant attention in the past few years. Beside the aforementioned works, AI have been successfully used for dynamic stability assessment such as frequency stability [17], [18], rotor angle stability [10], [19], [12], voltage stability [20], [21], [22] and fault location, detection and diagnosis [23], [24]. While in online applications the computational speed of the AI-based approach is a critical issue, for offline applications such as [10], [22], [12] the speed of simulation is not critical but desired as it increases productivity and minimizes costs [25].…”

Section: Introductionmentioning

confidence: 99%

Practical Framework for Frequency Stability Studies in Power Systems With Renewable Energy Sources

et al. 2020

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The transition from power systems dominated by synchronous machines to systems based on converter-based generation technologies (CGTs), is weakening currently robust power systems by reducing system inertia with the replacement of synchronous generators with low-inertia CGTs. From a frequency stability viewpoint, this is resulting in faster frequency dynamics and more frequent and larger frequency excursions after system contingencies, thus significantly affecting the stability of power systems dominated by CGTs, requiring detailed stability assessments to ensure the secure integration of CGTs. In this paper, a practical framework is presented for frequency stability studies based on time domain simulations of power systems with CGTs. A fundamental part of the proposed approach is the use of a filter to first identify worst-case scenarios among various possible system operating conditions. Once these worst-case scenarios are identified, a clustering technique is used to select representative worst-case operating conditions to evaluate the frequency stability of the system using time-domain simulations. The effectiveness of the proposed framework is demonstrated on the Chilean Northern Interconnected System (NIS), where it is shown that the proposed filter is able to quickly identify worst-case scenarios for further study. Moreover, we show that the selected representative operating conditions cover a wide-range of worst-case frequency responses, demonstrating the effectiveness of the proposed tool for frequency stability analyses.

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Adaptive scheme for local prediction of post-contingency power system frequency

Cited by 17 publications

References 18 publications

Recent trends in integrity protection of power system: A literature review

Recent trends in integrity protection of power system: A literature review

Multiobjective optimal setting for UFLS relays considering voltage deviation

Practical Framework for Frequency Stability Studies in Power Systems With Renewable Energy Sources

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