Explosion mechanism investigation of high power IGBT module

Li, Daohui; Fang, Qi; Packwood, Matthew; Islam, A.; Coulbeck, L.; Li, Xiang; Wang, Yangang; Luo, Hailin; Dai, Xiaoping; Liu, Guoyou

doi:10.1109/eurosime.2018.8369864

Cited by 3 publications

(1 citation statement)

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“…Therefore, it is important to predict or avoid any component failure that can lead to a sudden discharge of the energy in dc capacitors. If left unprotected, undesirable short-circuit failures can lead to high surge currents within the submodules [4], [5]. Unprotected failures can potentially damage adjacent components in the circuit and halt the operation of the converter.…”

Section: Introductionmentioning

confidence: 99%

Online Health Monitoring of DC-Link Capacitors in Modular Multilevel Converters for FACTS and HVDC Applications

Asoodar

Nahalparvari

Danielsson

et al. 2021

IEEE Trans. Power Electron.

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This paper presents an online health monitoring scheme for dc capacitors in modular multilevel converters (MMCs). The health monitoring algorithm is based on detecting changes in the dc capacitance value over time. The proposed algorithm only utilizes measurements that are typically available in flexible alternating current transmission systems (FACTS) and high-voltage direct current (HVDC) applications. Hence, in the proposed estimation method, no additional sensors are used. The estimation scheme considers the presence of noise in voltage and current measurements, and utilizes a recursive least square (RLS) estimator in conjunction with a special low-pass filter to minimize the estimation errors. Simulation results of a hardware replica, as well as experimental results on a low-power MMC prototype show that the proposed scheme can identify the dclink capacitance value with a maximum error of 1%.

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Section: Introductionmentioning

confidence: 99%