NDLI: Methodology to incorporate stuck condition of the circuit breaker in reliability evaluation of electrical distribution networks

Content Provider	IET Digital Library
Author	Timalsena, Kiran Raj Karki, Rajesh Bhattarai, Safal
Abstract	The random failure of a circuit breaker (CB) in a power distribution network adversely impacts its ability to maintain supply continuity to its electricity customers. Among different CB failure modes, the failure to open, or the stuck condition, of a normally closed CB causes the operation of its backup breaker(s) leading to outages of multiple healthy feeders. Stuck condition is a low-probability failure event, but has wide-spread consequences when it occurs. This study proposes a generalised analytical methodology to identify the failure events due to the stuck breaker condition. The complexity of the reliability evaluation of a modern distribution system involving multiple switching arrangements is achieved through a search algorithm and repeated matrix operations that can readily be implemented in a computer program. The methodology is illustrated using a test distribution network. The usefulness of the methodology is demonstrated by quantifying the impact of the stuck breaker condition on load point and system reliability indices. The developed methodology can be a useful tool for industrial/commercial customers and utilities to incorporate the impact of breaker failures, including stuck breaker conditions, and make wise investment decisions in the upgrade and maintenance of the distribution network components and the protection system.
Starting Page	4956
Ending Page	4964
Page Count	9
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 21, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/21
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2020.0164
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-09-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Algebra Backup Breaker Breaker Failure CB Failure Modes Circuit Breaker Distribution Network Distribution Network Component Electrical Distribution Network Failure Analysis Generalised Analytical Methodology Investment Investment Decisions Load Point Low-probability Failure Event Matrix Algebra Matrix Operation Normally Closed CB Optimisation Technique Power Distribution Economics Power Distribution Network Power Distribution Protection Power Distribution Reliability Power System Economics Power System Managemen Power System Operation Power System Protection Probability Protection System Random Failure Reliability Reliability Evaluation Search Algorithm Search Problem Statistics Stuck Breaker Condition Switch System Reliability Indices
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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