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This paper proposes a direct power control (DPC) strategy for the grid-connected voltage source inverter (VSI) without phase-locked loop (PLL) under harmonically distorted voltage conditions. A virtual angular is employed instead of the voltage vector angular acquired by the PLL. The second-order vector integrator (SOVI) is integrated with the DPC to implement two different control targets of smooth...
A novel Hilbert-transform-based parameter identification method for time-varying vehicle dynamics under harmonic conditions is proposed. In order to build accurate simulation models, system parameters related to its linear singletrack model need to be estimated based on the experimental data. Unlike other parameter identification methods, Hilberttransform- based approach is capable of identifying...
We demonstrate a dramatic enhancement of the below-threshold harmonics in the vicinity of atomic resonances. The dependence on the driving laser carrier-envelope phase suggests a nonperturbative mechanism. Phase matching promises scalability to microJoule pulse energies.
This paper proposals a novel hybrid static var compensator, which can adjust capacitor continuously. The proposed compensator combines the PWM type AC_Buck converter with the transformer to adjust the voltage on the compensating capacitor directly. So the continuous output of reactive power is realized. The compensator has fast dynamic response, and produces no harmonic. The capacity of the transformer...
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