Reliability Equivalence and Sensitivity Analysis to UHVDC Systems Based on the Matrix Description of the F&D Method

For reliability analysis to ultra HVDC transmission (UHVDC) systems, the transition rates after multi-step equivalence are not explicit expressions of the reliability parameters. Thus, the sensitivity of the reliability indices to the parameters cannot be analytically expressed. A new sensitivity mo...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on power delivery 2016-04, Vol.31 (2), p.456-464
Main Authors: Li, Shenghu, Ma, Yanru, Hua, Yuting, Chen, Peng
Format: Article
Language:English
Subjects:
Agglomeration
Availability
Computed tomography
Derivatives
Equivalence
Estimates
Frequency and duration (F&D)
HVDC transmission
Markov analysis
Mathematical models
Power system reliability
reliability equivalence
Reserves
Sensitivity
Sensitivity analysis
state aggregation
Transformers
ultra HVDC (UHVDC)
Windings
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:For reliability analysis to ultra HVDC transmission (UHVDC) systems, the transition rates after multi-step equivalence are not explicit expressions of the reliability parameters. Thus, the sensitivity of the reliability indices to the parameters cannot be analytically expressed. A new sensitivity model after equivalence is proposed. The state space considering the winding of converter transformers is derived, two half-capacity levels are differentiated, and the passive reserve shutdown is considered. The derivatives of the state probabilities to reliability parameters are given by the transition rates. The transition frequencies before and after state aggregation are given by matrix form to facilitate the frequency and duration (F&D) method, thus yielding sensitivities after reliability equivalence. Numerical results validate accuracy of the sensitivity and the resulting reliability indices, and quantify the dependency of the sensitivity on the parametric change and spare schemes. The proposed model helps determine the vulnerable parameter and component of UHVDC systems, find countermeasures, or estimate error due to the uncertainty of reliability parameters.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2015.2396037