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Previous space vector pulse-width modulation (SVPWM) methods for a multilevel three-phase voltage source inverter (VSI) have the problems including the computational complexity to identify the location of the reference voltage vector, the memory requirements of switching states and corresponding duty ratios, or no generalized switching pulse durations of switches. These problems are related to the...
A three-phase three-port rectifier (TPTPR), which is capable of handling an AC port, a low voltage DC port and a high voltage DC port simultaneously, is presented in this paper. To directly transfer power from the AC port to the low voltage DC port within single-stage power conversion, a modified SVPWM strategy based on asymmetric three-level vector space is analyzed and evaluated in this paper. With...
This paper presents a three-phase converter architecture with a reduced common mode voltage to be used in photovoltaic power systems. The full-bridge architecture is modified by adding two additional switches in the DC path that allow decoupling the load from the source during the freewheeling phases. Optimized modulation strategies are analyzed and compared against the space vector modulation for...
This paper analyzes a three-phase fixed input to five-phase variable amplitude/frequency output matrix converter topology to feed a five phase system. Conventionally, back-to-back topology is employed, which requires dc-link capacitor and needs large energy storage elements. This is disadvantageous for low space applications like aeroplanes, electric vehicles etc. The alternative is seen in matrix...
This paper presents a new space vector control method, based on three-phase abc coordinates of the space vector control method, avoiding the αβγ coordinates of the coordinate transformation, reducing the role of the space vector and its time complexity greatly, More easy-to-digital control implementation. Meanwhile, according to three-phase four-leg circuit average current model, given the instruction...
This paper experimentally investigates the performance of three-phase voltage source PWM converter, with the grid interfaced photovoltaic energy conversion system being the main application. In such applications the ground leakage current (common mode current, CMC) should be much less than an ampere and this is difficult to obtain in transformerless (direct) connected systems. With the target being...
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