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Conventional Hybrid Power Quality Conditioner (HPQC) adopts LC coupling branch and L coupling branch in the back-to-back converters to reduce the converter compensation capacity as well as the DC voltage. However, HPQC could only achieve the minimum compensation capacity under certain special load condition. To maintain the converter compensation capacity at a low level under all load conditions,...
An improved hybrid unified power flow controller (IHUPFC) is developed in this paper to increase the utilization rate of transmission line and enhance the transmission capacity in extra-high voltage (EHV) and ultra-high voltage (UHV) grid. Based on introducing the existing power flow controllers, the advantages of IHUPFC in structure and performance are analyzed. The proposed IHUPFC is composed of...
In this paper, an immune algorithm is developed for optimization of the harmonic performance of a single-phase inverter under a novel dead-time elimination PWM control strategy. The proposed scheme is based on the division of reference current and constraining switching states, and executes the conventional dead-time elimination in most of the reference current fundamental period but switches to the...
In this paper, an immune algorithm (IA) is developed for optimization of the harmonic performance of a three-phase inverter under the space-vector pulsewidth-modulation (SVPWM) control strategy. The presented algorithm employs the immune approach as the search method for finding the best optimal control vectors and action time of the three-phase inverter. As a result, the optimal control vectors and...
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