Estimation for Expected Energy Not Served of Power Systems Using the Screening Methodology of Cascading Outages in South Korea

Goo, Bokyung; Hur, Jin

doi:10.3390/en11010081

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…Furthermore, an introduced screening methodology relied on sequential contingency simulation of cascading outages, incorporating a probabilistic analysis and a visualization model [21]. The expected energy not served was estimated by simulating the potential outages in the power system against severe scenarios.…”

Section: Introductionmentioning

confidence: 99%

A Case Study on National Electricity Blackout of Turkey

Saribulut,

Ok,

Ameen

2023

Energies

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The necessary precautions should be taken in order to prevent service interruption during the maintenance and repairing of electricity networks. Among these measures, emergencies that may occur in the network should be foreseen, hazard scenarios should be created, and solutions should be developed. If these are not done, a blackout, which first follows the local regions and eventually results in the collapse of the national electrical network, may take place. In this study, the national blackout of Turkey that occurred on 31 March 2015 is examined. The information about Turkey’s electrical infrastructure and its energy policies was provided, as well as the reliability assessment criteria for power systems and examples of significant blackouts that occurred worldwide. The direct relation between line voltage and system frequency was provided with mathematical derivation by using real data taken from a local industrial zone. Then, a case study is presented to demonstrate this direct relation. The causes, development process, and consequences of the blackout are discussed in detail, and some recommendations are offered to increase the security of the electrical infrastructure and to prevent future occurrences while ensuring the sustainability of the system.

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Section: Introductionmentioning

confidence: 99%

A Case Study on National Electricity Blackout of Turkey

Saribulut,

Ok,

Ameen

2023

Energies

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“…If corrective control actions are not taken or there is a failure to isolate the affected region to tackle these issues, an additional line trip may trigger oscillation in the system before its complete collapse [8]. Under such circumstances, and as a last resort, controlled islanding has been recommended to save the power system from a big blackout [2,9].…”

Section: Introductionmentioning

confidence: 99%

A Three-Stage Procedure for Controlled Islanding to Prevent Wide-Area Blackouts

Shao¹,

Mao²,

Liu³

et al. 2018

Energies

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Controlled islanding has been proposed as a last resort action to stop blackouts from happening when all standard methods have failed. Successful controlled islanding has to deal with three important issues: when, and where to island, and the evaluation of the dynamic stability in each island after islanding. This paper provides a framework for preventing wide-area blackouts using wide area measurement systems (WAMS), which consists of three stages to execute a successful islanding strategy. Normally, power system collapses and blackouts occur shortly after a cascading outage stage. Using such circumstances, an adapted single machine equivalent (SIME) method was used online to determine transient stability before blackout was imminent, and was then employed to determine when to island based on transient instability. In addition, SIME was adopted to assess the dynamic stability in each island after islanding, and to confirm that the chosen candidate island cutsets were stable before controlled islanding was undertaken. To decide where to island, all possible islanding cutsets were provided using the power flow (PF) tracing method. SIME helped to find the best candidate islanding cutset with the minimal PF imbalance, which is also a transiently stable islanding strategy. In case no possible island cutset existed, corresponding corrective actions such as load shedding and critical generator tripping, were performed in each formed island. Finally, an IEEE 39-bus power system with 10 units was employed to test this framework for a three-stage controlled islanding strategy to prevent imminent blackouts.

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“…Preventive islanding [4][5][6] is one solution to prevent widespread blackouts and to maintain the transient stability of the power systems [7,8]. When all conventional protection and control measures fail, and the system tends to get into this state with widespread blackout, the last line of defense is to split a large network into a number of smaller, sustainable islands [9][10][11]. This not only prevents an outage from spreading, but also reduces the number of customers affected and makes resynchronization easier [12].…”

Section: Introductionmentioning

confidence: 99%

A New Indicator of Transient Stability for Controlled Islanding of Power Systems: Critical Islanding Time

et al. 2018

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Transient stability after islanding is of crucial importance because a controlled islanding strategy is not feasible if transient stability cannot be maintained in the islands created. A new indicator of transient stability for controlled islanding strategies, defined as the critical islanding time (CIT), is presented for slow coherency-based controlled islanding strategies to determine whether all the islands created are transiently stable. Then, the stable islanding interval (SII) is also defined to determine the appropriate time frame for stable islanding. Simulations were conducted on the New England test system–New York interconnected system to demonstrate the characteristics of the critical islanding time and stable islanding interval. Simulation results showed that the answer for when to island could be easily reflected by the proposed CIT and SII indicators. These two indicators are beneficial to power dispatchers to keep the power systems transiently stable and prevent widespread blackouts.

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Estimation for Expected Energy Not Served of Power Systems Using the Screening Methodology of Cascading Outages in South Korea

Cited by 4 publications

References 24 publications

A Case Study on National Electricity Blackout of Turkey

A Case Study on National Electricity Blackout of Turkey

A Three-Stage Procedure for Controlled Islanding to Prevent Wide-Area Blackouts

A New Indicator of Transient Stability for Controlled Islanding of Power Systems: Critical Islanding Time

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