A Space Vector Modulation Method for Multi-source Converter
A space vector modulation and converter technology, applied in vector control systems, electronic commutation motor control, control systems, etc., can solve the problems of no proposed mid-point potential, increased computational complexity, poor harmonic performance, etc. Energy flow mode, improve harmonic performance, realize the effect of power distribution
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[0076] Such as Figure 6 As shown, the embodiment of the present invention provides a space vector modulation method for a multi-source converter proposed by the present invention. The current SVPWM algorithm is discarded so that the AC side of the multi-source converter can obtain a three-level output phase voltage, and the AC output harmonic can be improved. Wave performance; use coordinate calculation method to solve the problem caused by the unbalanced midpoint voltage, and reduce the amount of calculation; use vector group 1 and vector group 2 mixed modulation, by controlling the action time weight of vector group 1 and vector group 2 , can realize the power distribution of the DC side, and obtain more energy flow modes.
[0077] The multi-source converter topology is as figure 1 As shown, the three-level output phase voltage obtained on the AC side is the voltage relative to the neutral point. Taking one of the phase bridge arms as an example, the two independent energy...
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