Dependability and security-based failure considerations in protection system reliability studies

Vadlamudi, Vijay Venu; Gjerde, Oddbjørn; Kjølle, Gerd Hovin

doi:10.1109/isgteurope.2013.6695264

Cited by 14 publications

(28 citation statements)

References 5 publications

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“…In the process, the healthy neighboring line is isolated from the system as well until further appropriate switching action is executed. Recent studies such as [10] - [11] include the comprehensive effect of such protection system dependencies in the power system reliability modeling and analysis. However, the level of specificity involved in obtaining the relevant protection system input data parameters for such models is found to be a hindrance to the realization of corresponding reliability indices, and hence the need for consolidated protection system failures related data collection efforts.…”

Section: B Protection System Failures and Misoperationsmentioning

confidence: 99%

Effects of dependent and common mode outages on the reliability of bulk electric system — Part I: Basic concepts

Papic¹,

Agarwal

Bian³

et al. 2014

2014 IEEE PES General Meeting | Conference &Amp; Exposition

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This paper is the first part of a two-part paper based on the ongoing activity carried out by the Task Force (TF) of the Working Group (WG) on Probability Applications for Common Mode Events (PACME) in electric power systems under the Reliability, Risk and Probability Applications (RRPA) Subcommittee. The primary objectives of this work are to (1) review and discuss the basic definitions of dependent, commonmode and cascading outage events, (2) identify the major causes of common-mode, dependent and cascading outages, (3) recognize the effects of protection system failures and misoperations on the Bulk Electric System (BES), and (4) assess the impact of weather related outages and extreme events on the performance of the BES. The scope of Part I is limited to the basic concepts on common-mode and dependent outages. The overall goal of the two papers is to assist the wider efforts within the industry in practically assessing the effects of dependent and common-mode outages on the reliability of BES.978-1-4799-6415-4/14/$31.00 ©2014 IEEE Cascading: It is the uncontrolled successive loss of system elements triggered by an incident at any location. Cascading results in widespread electric service interruption that cannot be restrained from sequentially spreading beyond an area predetermined by studies. Adverse reliability impact: It is the impact of an event that results in BES instability or Cascading.

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Section: B Protection System Failures and Misoperationsmentioning

confidence: 99%

Effects of dependent and common mode outages on the reliability of bulk electric system — Part I: Basic concepts

Papic¹,

Agarwal

Bian³

et al. 2014

2014 IEEE PES General Meeting | Conference &Amp; Exposition

View full text Add to dashboard Cite

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“…This will in turn increase the risk of the scenario, as a function of its probability and consequence [15]. Previous studies have shown how protection system failures can have a significant impact on system reliability evaluation [16,17]. Combining the effects of failure bunching with protection system failures may give more realistic picture of the power system reliability assessment.…”

Section: Introductionmentioning

confidence: 99%

“…The goal of this paper is to carry out investigations to verify the proposed hypothesis. The unique contributions made in this paper are as follows: A generalized compact system of equations using graph theory has been formulated to quantify the impact of protection system failures on power system reliability, based on [17]. Graph theory helps establish a systematic identification of propagation of transmission line failures due to misoperation of protection systems.…”

Section: Introductionmentioning

confidence: 99%

Reliability of Supply and the Impact of Weather Exposure and Protection System Failures

Kiel

Kjølle

2020

Applied Sciences

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Extreme weather is known to cause failure bunching in electrical transmission systems. However, protection systems can also contribute to the worsening of the system state through various failure modes—spontaneous, missing or unwanted operation. The latter two types of failures only occur when an initial failure has happened, and thus are more likely to happen when the probability of failure of transmission lines is high, such as in an extreme weather scenario. This causes an exacerbation of failure bunching effects, increasing the risk of blackouts, or High Impact Low Probability (HILP) events. This paper describes a method to model transmission line failure rates, considering both protection system reliability and extreme weather exposure. A case study is presented using the IEEE 24 bus Reliability Test System (RTS) test system. The case study, using both an approximate method as well as a time-series approach to calculate reliability indices, demonstrates both a compact generalization of including protection system failures in reliability analysis, as well as the interaction between weather exposure and protection system failures and its impact on power system reliability indices. The results show that the inclusion of protection system failures can have a large impact on the estimated occurrence of higher order contingencies for adjacent lines, especially for lines with correlated weather exposure.

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“…Several considerations need to be taken into account especially on its reliability and safety of the distribution network to ensure safety, uninterrupted and sustainable production of power [1], [2], [3]. The protection scheme for the mentioned distribution network must be correctly designed and configured in order to avoid and minimize damages to people, equipment and properties during fault occurrence [4]. The protection system should also have functions of improving system stability, detecting faults, separating or isolating faulty section from the rest of the system and restore normal operation after the fault clearance [2].…”

Section: Introductionmentioning

confidence: 99%

“…The protection system should also have functions of improving system stability, detecting faults, separating or isolating faulty section from the rest of the system and restore normal operation after the fault clearance [2]. The study of the reliability of a protection system is critical and must be incorporated with power system reliability studies [4], [5]. There are some standards that need to be complied in providing a protection scheme to any distribution network.…”

Section: Introductionmentioning

confidence: 99%

Optimal Overcurrent Relay Coordination for Sustainable Standalone Hydrokinetic Renewable Energy (SHRE) Distribution Network at Batang Rajang River, Kapit Sarawak by Genetic Algorithm Technique

Ahmad¹,

Othman²,

Hizam³

2018

Preprint

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This paper presents a study on optimization of Overcurrent relay (OCR) coordination protection scheme for Sustainable Standalone Hydrokinetic Renewable Energy (SHRE) distribution network at Batang Rajang river, located at Kapit Sarawak, Malaysia by turning river stream into power generation source. The purpose of the project is to develop rural electrification system for native long houses along the river. The research study is tested on a DigSILENT develop model of the SHRE distribution network and in accordance with all respectively unique parameters and relevant standards. Since this is a new standalone distribution system, an efficient and properly coordinated overcurrent protection system must be provided. Improper and miscoordination among OCRs result in maloperation of the protection system that can lead to false tripping and an unnecessary outage and power system instability. Thus, the objective of this work is to employ Genetic Algorithm (GA) technique in Matlab/Simulink for optimal overcurrent coordination and settings among all OCRs in the proposed distribution network in order to improve the speed of OCR tripping operation. The GA is used because the project is fast track and requiring the simplest method available. In this strategy, time dial setting (TDS) is optimized by using plug setting multiplier (PSM) as the constraint. The obtained results show a significant improvement of the relay operating time of 36.01% faster than that of conventional numerical technique during fault occurrence. Thus, an efficient and reliable overcurrent protection scheme has been achieved for the SHRE distribution network.

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Dependability and security-based failure considerations in protection system reliability studies

Cited by 14 publications

References 5 publications

Effects of dependent and common mode outages on the reliability of bulk electric system — Part I: Basic concepts

Effects of dependent and common mode outages on the reliability of bulk electric system — Part I: Basic concepts

Reliability of Supply and the Impact of Weather Exposure and Protection System Failures

Optimal Overcurrent Relay Coordination for Sustainable Standalone Hydrokinetic Renewable Energy (SHRE) Distribution Network at Batang Rajang River, Kapit Sarawak by Genetic Algorithm Technique

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