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Study on the SVPWM algorithm of N-level inverter in the context of non-orthogonal coordinates |
| XIAO Xiang-ning1, JIANG Xu1, LIU Hui-wei1, LIU Hao2, KONG Sheng-li2 |
| 1.Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control, North China Electric Power University, Beijing 102206, China; 2.Electric Power of Henan, Zhengzhou 450000, China |
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Abstract In this paper, the authors propose a new space vector pulse width modulation (SVPWM) algorithm based on non-orthogonal coordinates for N-level inverters. First, it is pointed out that classical αβ coordinates-based SVPWM has many shortcomings because of improper coordinate choice. Then, a non-orthogonal coordinates-based SVPWM is proposed to solve these problems. The proposed algorithm can easily identify which sector the reference space vector falls in and conduct simple operations to find the duty cycle of each vector. Finally, it is verified that the proposed SVPWM is actually a pulse-width modulation (PWM) technology based on line voltages.
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Issue Date: 05 June 2006
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