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http://dx.doi.org/10.7471/ikeee.2019.23.4.1208

Life-cycle estimation of HVDC full-bridge sub-module considering operational condition and redundancy  

Kang, Feel-soon (Dept. of Electronics and Control Engineering, Hanbat National University)
Song, Sung-Geun (Energy conversion research center, Korea Electronics Technology Institute)
Publication Information
Journal of IKEEE / v.23, no.4, 2019 , pp. 1208-1217 More about this Journal
Abstract
The life-cycle prediction of the sub-module which is the unit system of MMC is very important from the viewpoint of maintenance and economic feasibility of HVDC system. However, the life-cycle prediction that considers only the type, number and combination of parts is a generalized result that does not take into account the operating condition of the sub-module, and may significantly differ from the life-cycle of the actual one. Therefore, we design a fault tree for the purpose of reflecting the operation characteristics of the full-bridge sub-module and apply the MIL-HDBK-217F to the failure rate of the basic event to predict the life-cycle of the full-bridge sub-module. It compares the life-cycle expectancy of the conventional failure rate analysis with the proposed fault-tree analysis and compares the lifetime according to whether the redundancy of the full-bridge sub-module is considered.
Keywords
Failure-rate; Fault-tree analysis (FTA); Full-bridge; High voltage direct current (HVDC); Meantime between failure (MTBF); Modular multilevel converter (MMC); sub-module;
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