Wide-area measurements-based out-of-step protection system

Sauhats, Antans Sauļus; Utāns, Andrejs; Biela-Dailidovicha, Edite

doi:10.1109/rtucon.2015.7343113

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…46 OOS is also an instability condition and basically an angular instability of the system. 80 Due to an extensive power system fault or opening of a tie-line between two systems, a synchronous generator may lose its synchronism. This condition is called OOS for synchronous generators.…”

Section: Sips Definition and Recent Developmentsmentioning

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 Definition and Recent Developmentsmentioning

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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“…OOS protection operates when the angle difference exceeds the maximum allowed value. The Latvian Power system network and the neighboring networks of Estonia and Lithuania use angle control-based OOS protection of the local type described in [7][8][9]. Protection uses only local measurements (bus voltage and current through the line of interest), and the entire network should be represented with a two-machine equivalent.…”

Section: Out-of-step Protection Backgroundmentioning

confidence: 99%

“…The system consists of several protection terminals ( Figure 3), with each of them measuring generation sources' currents and voltages at the power plant level [9]. The protection system structure is similar to the PMU-based approach, except that proposed structure is able to operate in protection-like real time (>250 samples per second).…”

Section: Proposed Oos Protection Structurementioning

confidence: 99%

Angle Control-Based Multi-Terminal Out-of-Step Protection System

et al. 2017

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From time to time a sequence of unexpected and overlapping contingencies may lead to power system angular instability and even blackouts if not addressed adequately by means of an out-of-step (OOS) protection system. The motivation of the paper is an attempt to develop a workable prototype of the OOS protection system. The deficiencies of the protection currently used in the Latvian Power System network are highlighted and a new protection structure is proposed. The protection system comprises of several strategically located terminals, exchanging information in real time by means of a communication network. The OOS condition detection method is based on system-wide generation sources, electromotive forces, vectors, and angle control. The network splitting decision is based on generator coherence evaluation. Protection terminals determine online the groups of coherent generators and choose the splitting boundary from a predefined transmission lines (TLs) cut sets list. The protection system structure, algorithm of operation, and possible IEC 61850 communication standard-based implementation are described.

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“…The out-of-step center position criterion and the bus grouping criterion are then proposed. This method, like the wide-area measurement (WAM) methods in [6,7], depends on the accuracy of the measurement units and the fidelity of wide-area communications to fully use it. Other existing approaches include variation in voltage frequency-based method [8], line differential current-based method [9], instantaneous active power deviation-based method [10], adaptive method [11], decision tree method [12] and turbine generator behavior-based method [13].…”

Section: Introductionmentioning

confidence: 99%