Tracing the Unreliability Contributions of Power System Components

Abstract

In many situations, a utility would like to know how much each component in the system contributes to the unreliability consequences associated with load point and system outages. This article proposes an unreliability tracing principle, model, and an approach to address this question. A proportional sharing principle has been developed to track reliability indices. The unreliability tracing sharing factors are derived so that they can be used to recognize the major unreliability contributions in a power system. The case studies indicate that the developed technique can be extensively applied to power systems for unreliability tracing and recognizing the major unreliability contributions.

ROCK1 and ROCK2 regulate epithelial polarisation and geometric cell shape

“…This paper presents the following two UT principles, the FCSP and the PSP: FCSP: Only the failed components take on the responsibility for the system unreliability. In other words, the healthy components are not considered in the UT. PSP: The reliability indices are proportionally distributed among all the system components according to the PSP described in References16, 17. The PSP basically assumes that the system is a perfect ‘mixer’ of every term so that it is impossible to tell which particular term will go into another particular term.…”

Tracing the component unreliability contributions and recognizing the weak parts of a bulk power system

“…As discussed in References [16,17], the PSP can neither be proved nor disproved, which is the same as the PSP used to trace the power flow [18,19].…”

“…In other words, the healthy components are not considered in the UT. (2) PSP: The reliability indices are proportionally distributed among all the system components according to the PSP described in References [16,17]. The PSP basically assumes that the system is a perfect 'mixer' of every term so that it is impossible to tell which particular term will go into another particular term.…”

“…The UT technique has been applied to the reliability study of generation systems and general complex networks [16,17]. This paper extends this technique to the BPS.…”

Tracing the unreliability and recognizing the weak parts of shipboard power system

“…Considerable studies have been done in the development of reliability modeling techniques and algorithms and risk analysis [1][2][3][4][5][6][7][8][9], but there has been relatively little research on the unreliability tracing (UT) technique. References [10][11] present a quantitative assessment of the contribution of a selected component to the system unreliability and it will be useful to identify the weak parts of the system. This information can provide the power system planners and operators with useful information in reliability assessment.…”