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- W3088086244 abstract "The electromagnetic transient (EMT) simulation of a power system involving power-electronics converters requires a fairly small time-step size to consider switching of the converters, thus leading to a heavy computational burden. To accelerate such simulations, this article generalizes the time average method (TAM), originally developed for real-time simulations, so that it becomes suitable to offline EMT simulations. For obtaining accurate current waveforms with a large time step, the TAM and the proposed method represent each leg of an inverter by voltage sources, and its output voltage is modified by interpolation at an instance of switching. The original TAM was intended for the primitive backward Euler method. This article contributes to generalize it for the trapezoidal integration method, which is widely used in offline simulation programs. In addition, the proposed method uses a simple formula to identify the switching instance for the implementation on off-the-shelf PCs, rather than a hardware counter in an field programmable gate array as used in the TAM. This article shows that the proposed method enables to extend the time step by a factor of five without deteriorating the accuracy. A case study demonstrates reduction of computational time by a factor of three for the offline simulation of a single-phase grid-connected inverter with reasonable reproduction of harmonics." @default.
- W3088086244 created "2020-10-01" @default.
- W3088086244 creator A5013264006 @default.
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- W3088086244 date "2021-05-01" @default.
- W3088086244 modified "2023-09-27" @default.
- W3088086244 title "An Inverter Model Simulating Accurate Harmonics With Low Computational Burden for Electromagnetic Transient Simulations" @default.
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- W3088086244 doi "https://doi.org/10.1109/tpel.2020.3026721" @default.
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