Operational Reliability Model of Hybrid MMC Considering Multiple Time Scales and Multi-state Submodule

被引：10
|
作者：
Feng, Fei [1 ]
Yu, Juan [1 ]
Dai, Wei [1 ]
Yang, Zhifang [1 ]
Zhao, Xingpan [2 ]
Kamel, Salah [1 ]
Fu, Guobin [3 ]
机构：
[1] Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R China
[2] Chuxiong Power Supply Bur Yunnan Power Grid, Chuxiong 67500, Peoples R China
[3] State Grid Qinghai Elect Power Co, Elect Power Res Inst, Xining 810008, Peoples R China
来源：
JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY | 2021年 / 9卷 / 03期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Reliability; Power system reliability; Hybrid power systems; Insulated gate bipolar transistors; Wind speed; Wind power generation; Junctions; Modular multilevel converter (MMC); multiple time scales; submodule (SM); operational reliability; thermal cycling; PHYSICS-OF-FAILURE; LIFETIME ESTIMATION; DESIGN; HVDC; CONVERTER;
D O I：
10.35833/MPCE.2019.000227
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Environmental and electrical factors such as wind speed, air temperature and switching frequency have significant influences on the operational reliability of hybrid modular multilevel converter (MMC), which is commonly used for the wind power transmission. However, the existing reliability model of hybrid MMC based on statistics cannot accurately reflect the impact of these factors. In this paper, a new operational reliability model of hybrid MMC is presented. The reliability index of the hybrid MMC is coupled with its operation characteristics by calculating multi-term thermal cycling. In addition, an operation strategy of hybrid MMC is proposed to improve its reliability. The multi-state submodule (SM) is developed, which is capable of bypassing specific faulty power modules instead of the whole SM. Case studies show that the proposed operational reliability model could describe the impact of environmental and electrical factors. Also, the proposed operation strategy can improve the reliability of hybrid MMC by extending the operation time of SMs.
引用
收藏
页码：648 / 656
页数：9
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