Abstract：Pulse width modulations is a key technology in three-phase four-wire multi-level converter controlling. It directly affects the controlling performance of output zero-sequence voltage component. Traditional three-dimensional space vector modulation strategies have difficulties in achieving a good balance between voltage zero-sequence component controlling and algorithm complexity. A novel space vector modulation strategy in non-orthogonal three-dimensional coordinate system is proposed in this paper. Under this new non-orthogonal three-dimensional coordinate system, the proposed modulation has converted the original trigonometric functions in orthogonal three- dimensional space coordinate into simple algebraic operations, which greatly reduces algorithm complexity of the three-dimensional space vector modulation while preserving the independent control on the zero-sequence component. The experimental results verify the correctness and effectiveness of the proposed three-dimensional space vector modulation.
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2017, Vol. 32 
