LAPSE:2020.0710
Published Article
LAPSE:2020.0710
Reliability Equivalence to Symmetrical UHVDC Transmission Systems Considering Redundant Structure Configuration
Xing Jiang, Chengjin Ye, Yi Ding, Ruipeng Guo
June 23, 2020
In recent years, the ultra-high voltage direct current (UHVDC) transmission system has been developed rapidly for its significant long-distance, high-capacity and low-loss properties. Equipment failures and overall outages of the UHVDC system have increasingly vital influence on the power supply of the receiving end grid. To improve the reliability level of UHVDC systems, a quantitative selection and configuration approach of redundant structures is proposed in this paper, which is based on multi-state reliability equivalence. Specifically, considering the symmetry characteristic of an UHVDC system, a state space model is established as a monopole rather than a bipole, which effectively reduces the state space dimensions to be considered by deducing the reliability merging operator of two poles. Considering the standby effect of AC filters and the recovery effect of converter units, the number of available converter units and corresponding probability are expressed with in universal generating function (UGF) form. Then, a sensitivity analysis is performed to quantify the impact of component reliability parameters on system reliability and determine the most specific devices that should be configured in the redundant structure. Finally, a cost-benefit analysis is utilized to help determine the optimal scheme of redundant devices. Case studies are conducted to demonstrate the effectiveness and accuracy of the proposed method. Based on the numerical results, configuring a set of redundant transformers is indicated to be of the greatest significance to improve the reliability level of UHVDC transmission systems.
Keywords
redundant configure configuration, reliability equivalence, sensitivity analysis, UHVDC transmission system
Suggested Citation
Jiang X, Ye C, Ding Y, Guo R. Reliability Equivalence to Symmetrical UHVDC Transmission Systems Considering Redundant Structure Configuration. (2020). LAPSE:2020.0710
Author Affiliations
Jiang X: College of Electric Engineering, Zhejiang University, Hangzhou 310027, China
Ye C: College of Electric Engineering, Zhejiang University, Hangzhou 310027, China [ORCID]
Ding Y: College of Electric Engineering, Zhejiang University, Hangzhou 310027, China
Guo R: College of Electric Engineering, Zhejiang University, Hangzhou 310027, China
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Journal Name
Energies
Volume
11
Issue
4
Article Number
E753
Year
2018
Publication Date
2018-03-26
Published Version
ISSN
1996-1073
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PII: en11040753, Publication Type: Journal Article
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LAPSE:2020.0710
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doi:10.3390/en11040753
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Jun 23, 2020
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Calvin Tsay
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