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This paper proposes an advanced non-harmonic detection control strategy for three-phase four-wire Active Power Filter (APF) based on improved Vector-Resonant Control (VRC). The mathematical model of the split-capacitor configuration is established with the source currents and the DC bus voltage as state variables. The proposed control scheme detects and regulates the source currents directly, without...
As the grid-connected converter is operating in the unbalanced three-phase grid in the traditional control strategies, the even harmonics of the voltage appear in DC-link and the odd harmonics of the current in AC-link, which will severely affect the performance of the grid-connected converter. Under this circumstance, the unbalanced three-phase grid will bring various negative effects and difficulty...
The total harmonic distortion (THD) is an important character of vibration transducer calibration system. A new method is proposed in this paper to reduce the THD, which is based on the open-loop frequency response analysis of the vibration transducer calibration system and harmonic compensation. The mathematic model of the motion of electric shaker is described. Results of simulations and experiments...
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