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10. Study of Some Operational Degrees of Freedom for Cascaded AC-DC Converters in Solid State Transformer

Author

Cui Fengjiao, Anshuman Tripathi, Abishek Sethupandi, Vaisambhavana Sriram, and Glen G. Farivar

Subjects
Emulation, Computer science, business.industry, 020208 electrical & electronic engineering, Electrical engineering, 02 engineering and technology, Power factor, Converters, Degrees of freedom (mechanics), Grid, Fault (power engineering), Control theory, 0202 electrical engineering, electronic engineering, information engineering, business, Voltage
Abstract

Cascaded ac-dc converter is widely used in the first stage of solid state transformer (SST). The study of various operation modes of the cascaded ac-dc converter will help to understand the operation possibilities of the SST system. This paper studies the effect of an undetected fault in medium voltage (MV) side of a solid state transformer in terms of grid voltage, grid current, power factor and efficiency. The fault scenarios on ac-dc converter is studied and the controller response is evaluated using emulation result on a real-time emulator. An alternative operation mode of the ac-dc converter when the fault occurs is also proposed and demonstrated using emulation results.

Published
2019

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