North American transformer outage rates and durations in assessment of transmission system reliability and availability

Ekisheva, Svetlana; Gugel, H.

doi:10.1109/pesgm.2015.7285780

Cited by 10 publications

(2 citation statements)

References 2 publications

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“…is the duration (in hours), of the load curtailment at an isolated bus K due to the outage " j ". Severity Index For every outage of the generator and /or transmission line, rerouting of the power occurs in the transmission system, which will lead to overloading of the transmission lines [6][7][8][9][10][11]. It is required to improve the power-carrying capacity of the transmission lines to overcome the overloading effect and to meet the load demand to have the reliable operation of the composite power system.…”

Section: Introductionmentioning

confidence: 99%

Reliability Improvement of Composite Power System using UPFC

Sreeshobha¹,

Vidyasagar²

2023

IJEAT

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Together with quality power supply criteria, Composite Power System (CPS) reliability is also one of the important aspects of deciding the security of the CPS for a given load demand. In the current paper, the reliability of CPS is evaluated. The Newton Raphson (NR) approach is implemented in Power System Simulation for Engineering (PSSE) software to take into account, the load flows, then the power available to the load points, to evaluate the reliability of CPS. Newton Raphson NR Method was implemented by considering different contingencies of the CPS. Power available to the load points obtained by the NR method is critical in identifying the successful operating state of the CPS. Expected Load Curtailment (ELC), Number of Load Curtailment (NLC), Expected Energy Not Supplied (EENS), and Severity Index (SI) are the crucial dependability indices that are assessed. The main objective of the Reliability evaluation of the CPS is to investigate the scope for the improvement of reliability and explore the possible schemes to improve CPS reliability. The Unified Power Flow Controller (UPFC) one of the Flexible AC Transmission Systems is incorporated into the CPS to analyze the improvement in the reliability of the system. Further, the effect of UPFC on the power-carrying capacity of the lines under contingency conditions, resulting in the failure mode of CPS operation is examined. Improvement in the reliability indices of the system is observed due to UPFC incorporation.

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Section: Introductionmentioning

confidence: 99%

Reliability Improvement of Composite Power System using UPFC

Sreeshobha¹,

Vidyasagar²

2023

IJEAT

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“…NERC has been collecting continent-wide transmission outage and inventory data in Transmission Availability Data System (TADS) since 2008 [51,52]. TADS has been used to (a) assess the root cause of outages on major BPS elements; (b) to calculate typical reliability indices; and to (c) identify reliability risks due to independent, common mode, and dependent outages [53][54][55][56][57][58]. The fundamental aspects of common mode and dependent outages in the power systems are presented and reviewed in [59][60][61][62][63].…”

Section: Introductionmentioning

confidence: 99%

A Risk-Based Approach to Assess the Operational Resilience of Transmission Grids

Papic¹,

Ekisheva²,

Cotilla‐Sanchez

2020

Applied Sciences

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Modern risk analysis studies of the power system increasingly rely on big datasets, either synthesized, simulated, or real utility data. Particularly in the transmission system, outage events have a strong influence on the reliability, resilience, and security of the overall energy delivery infrastructure. In this paper we analyze historical outage data for transmission system components and discuss the implications of nearby overlapping outages with respect to resilience of the power system. We carry out a risk-based assessment using North American Electric Reliability Corporation (NERC) Transmission Availability Data System (TADS) for the North American bulk power system (BPS). We found that the quantification of nearby unscheduled outage clusters would improve the response times for operators to readjust the system and provide better resilience still under the standard definition of N-1 security. Finally, we propose future steps to investigate the relationship between clusters of outages and their electrical proximity, in order to improve operator actions in the operation horizon.

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