Fault diagnosis and fault tolerance control of multilevel sub-module based on HONBM self-inclusion. (November 2018)

• Record Type: Journal Article
• Authors: Yang, Longyue; Liu, Jianhua; Wang, Chonglin
• Is Part Of: Computers & electrical engineering. Volume 72(2018)
• Page Start: 92
• Page End: 99
• Publication Date: 2018-11
• Subjects: Bayes model -- Multilevel, Sub-module -- Fault diagnosis -- Fault tolerance control; Computer engineering -- Periodicals; Electrical engineering -- Periodicals; Electrical engineering -- Data processing -- Periodicals; Ordinateurs -- Conception et construction -- Périodiques; Électrotechnique -- Périodiques; Électrotechnique -- Informatique -- Périodiques; Computer engineering; Electrical engineering; Electrical engineering -- Data processing; Periodicals; Electronic journals; 621.302854
• DOI: 10.1016/j.compeleceng.2018.07.047
• Languages: English
• ISSNs: 0045-7906

Abstract

Abstract: The mathematical relation between the sub-module capacitance and the DC system operation characteristics has been analyzed from 4 aspects including the steady energy exchange process of modular multilevel flexible HVDC system, the dynamic response characteristics of active power control, the transient energy exchange process and the bridge arm protection requirement when the DC bipolar short circuit fault. A fault diagnosis and error prevention strategy for the multilevel sub-module system based on the higher order naive Bayes model (HONBM) is proposed. Firstly, analyze the model structure of the multilevel transmission sub-module, and give the Bayes model structure for the fault analysis of the electrical components in the multilevel transmission sub-module model. Then, based on the theoretical analysis results, the selection principle and the calculation method of the modularized multilevel sub-module capacitance are given. The sub-module capacitance is usually calculated according to the requirements of the steady-state sub-module voltage fluctuation and the dynamic response characteristics of the active power control, and then the calibration is made based on the transient sub-module voltage fluctuation and the bridge arm protection requirements.