The modular multi-level converter (MMC) is one of the significant facilities in the voltage source converter based high voltage direct current (VSC-HVDC) transmission system, and its reliability plays a key role in the reliable and continuous operation of the HVDC system. A detailed reliability model of the MMC was proposed with the consideration of sub-modules, the control/protection system and the cooling system. Reliability functions of MMCs with two redundancy strategies were presented by the k-out-of-n: G model and the Gamma distribution respectively. Based on the proposed reliability models, a quantitative assessment of the relative merits of MMCs with different redundant components, different redundancy rates and different redundancy strategies was undertaken, which could provide essential data for the decision-making in topology design and redundancy arrangement.
|Number of pages||7|
|Journal||Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering|
|Publication status||Published - 5 Apr 2016|
- K-out-of-n: G model
- Modular multi-level converter(MMC)
- Redundancy strategy
- Reliability assessment