Adaptive under‐voltage load shedding scheme for large interconnected smart grids based on wide area synchrophasor measurements

Adewole, Adeyemi Charles; Tzoneva, Raynitchka; Apostolov, Alexander

doi:10.1049/iet-gtd.2015.1250

Cited by 34 publications

(25 citation statements)

References 36 publications

(37 reference statements)

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“…Another study proposes an UV load shedding scheme based on response-based SIPS for interconnected smart grid. 37 For acceptable operating states, a relationship is framed between the generated reactive power and load shedding amount. The total reactive power deficit from all machines is represented by Equation (42).…”

Section: Calculation Of Reactive Power Deficiencymentioning

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: Calculation Of Reactive Power Deficiencymentioning

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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“…To improve the precision and efficiency of load shedding practices, some studies have developed wide area monitoring mechanisms. These approaches make use of the synchrophasor measurement technology (SMT) attained based on PMUs [16][17][18][19][20][21][22][23][24]. PMUs could provide synchronized measurements, which include the magnitude and phase angles of voltages and currents.…”

Section: Introductionmentioning

confidence: 99%

Decentralized Load Shedding Method Based on Voltage Stability Margin Index Using Synchrophasor Measurement Technology

Lee

Song

2018

Electronics

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This study develops an analytical method for assessing the voltage stability margins of a decentralized load shedding scheme; it then examines the challenges related to the existing load shedding scheme. It also presents a practical application for implementing the proposed method, based on the synchrophasor measurement technology in modern power grid operations. By applying the concept of a continuously-computed voltage stability margin index to the configuration of the Thévenin equivalent system, the maximum transfer power could be used as an index to monitor the voltage instability phenomenon and thus determine the required load shedding amount. Thus, the calculated voltage stability margin might be a useful index for system operators in the critical decision-making process of load shedding. Dynamic simulations are performed on real Korean power systems as case studies. Simulation results, when comparing the existing and proposed methods, showed that there was a considerable reduction in the amount of load shedding in the voltage instability scenario. This indicates that the synchrophasor measurement technology has a considerable effect on the proposed load shedding method. The simulation results have validated the performance of the proposed method.

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“…To improve the precision and efficiency of load shedding practice, some recent studies have developed wide‐area mechanisms . These approaches make use of synchrophasors attained based on phasor measurement units (PMUs).…”

Section: Introductionmentioning

confidence: 99%

Toward a wide-area load shedding scheme: Adaptive determination of frequency threshold and shed load values

Mehrabi

Afsharnia

Golshannavaz

2017

Int Trans Electr Energ Syst

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Summary Conventional under frequency and under voltage load shedding (UFLS and UVLS) schemes are generally independent than each other. Besides, in these schemes, the operating thresholds, amounts, and location of shed loads are settled in constant values for different disturbances. Due to these technical flaws, the conventional load shedding schemes fail to retrieve power system stability which outlines the necessity of devising improved adaptive mechanisms. To this end, the ongoing study proposes an adaptive UFLS scheme based on wide area measurement systems (WAMS). In contradiction to the existing methods, the proposed approach is featured with an adaptive manner. In other words, the frequency threshold of load shedding relays is adaptively tuned at each disturbance. Furthermore, a wide‐area index is proposed to select the amount of required shed loads. Extensive numerical studies conducted on a real‐world case study are involved to evaluate performance of the proposed approach.

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Adaptive under‐voltage load shedding scheme for large interconnected smart grids based on wide area synchrophasor measurements

Cited by 34 publications

References 36 publications

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

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

Decentralized Load Shedding Method Based on Voltage Stability Margin Index Using Synchrophasor Measurement Technology

Toward a wide-area load shedding scheme: Adaptive determination of frequency threshold and shed load values

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