What is Fault Tree Analysis

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Chapter 12

Optimizing and Measuring Smart Grid Operation and Control

Fault tree analysis is a top-down, deductive failure analysis in which an undesired state of a system is analyzed using Boolean logic to combine a series of lower-level events.

Published in Chapter:

Fault Tree-Based Root Cause Analysis Used to Study Mal-Operation of a Protective Relay in a Smart Grid

Hamid Bentarzi (Signals and Systems Laboratory (LSS), University M'hamed Bougara of Boumerdes, Algeria)

Source Title: Optimizing and Measuring Smart Grid Operation and Control

DOI: 10.4018/978-1-7998-4027-5.ch012

Abstract

This chapter presents how root cause analysis based on fault tree technique can be used to study mal-operation of protective relay in a smart power grid. This approach is used to identify disturbances first and root cause of mal operation of protective relays which may lead to unnecessary tripping and hence to blackout. Once the critical root causes are identified, mitigation measures first such as blocking protection functions and digital filters may be used in view of increasing the reliability of the considered protection system. The proposed approach has many advantages as it allows obtaining an important quantitative figure (security). These permits to strongly strengthen the elements of the protecting system which are most likely appropriate to failure and hence the impact on the overall system's cost is significant. Another main advantage is that it takes into account the reliability of the software part of the system which is considered to have a significant contribution in the overall reliability of the protecting system.

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Chapter 5

Fault tree analysis (FTA) postulates a hazard (top event of the fault tree) which must be avoided. It then reasons backward to identify all logical combinations of events which could lead the system to that hazard. FTA can be quantitative by combining figures for component failure rates to calculate overall probabilities of system hazards. It can also be qualitative by eliminating the component failures that are irrelevant to the total failure of the system, and thereby attempting to produce minimal failure scenarios. FTA is widely practiced in reliability engineering and in high-hazard industries.

Published in Chapter: Improving Dependability of Robotics Systems: Analysis of Sequence-Dependent Failures; From: Novel Design and Applications of Robotics Technologies

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Chapter 10

Fault tree analysis (FTA) is a top down, deductive failure analysis in which an undesired state of a system is analyzed using Boolean logic to combine a series of lower-level events. This analysis method is mainly used in the fields of safety engineering and reliability engineering to understand how systems can fail, to identify the best ways to reduce risk or to determine (or get a feeling for) event rates of a safety accident or a particular system level (functional) failure. FTA is used in the aerospace, nuclear power, chemical and processpharmaceutical, petrochemical and other high-hazard industries; but is also used in fields as diverse as risk factor identification relating to social service system failure.

Published in Chapter: Model-Based Analysis and Engineering of Automotive Architectures with EAST-ADL; From: Handbook of Research on Embedded Systems Design

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Chapter 593

Fault Tree Analysis (FTA) postulates a hazard (top event of the fault tree) which must be avoided. It then reasons backward to identify all logical combinations of events which could lead the system to that hazard. FTA can be quantitative by combining figures for component failure rates to calculate overall probabilities of system hazards. It can also be qualitative by eliminating the component failures that are irrelevant to the total failure of the system, and thereby attempting to produce minimal failure scenarios. FTA is widely practiced in reliability engineering and in high-hazard industries.

Published in Chapter: Improving Dependability of Robotics Systems; From: Encyclopedia of Information Science and Technology, Fourth Edition

Full Text Chapter Download: US $37.50 Add to Cart