【摘要】 传统的空间电压矢量脉宽调制(SVPWM)计算量大,精度低,而如今大多数研究都需中点平衡控制策略。运用一种简化三电平SVPWM算法,把空间矢量平面的每个大区域分割称两个小的直角三角形区域,而空间电压矢量根据最近矢量合成原则可由其所在直角三角形所对应的基本矢量合成,使计算量大大减少,巧妙地省去了对其中点的控制,简化了整体控制算法难度。首先在MATLAB中验证此算法的正确性,而后在以DSP2808和CPLD为核心的10 kW NPC三电平光伏逆变器上验证了该算法的可操作性。更多还原

【Abstract】 Traditional space vector pulse width modulation(SVPWM) algorithm for three-level need intensive calculation operations and low precision. In this paper, a new simplified three-level SVPWM algorithm is applied, that is,each big area of the space vector plane is divided into two right-angled triangle areas, the space voltage vector is synthesized by several switch vectors corresponding to the right-angled triangle which contains the terminal of the reference vector. As a result, the calculation is greatly reduced, and cleverly eliminates the need for the point control, simplifies the overall control algorithm. Firstly, verify the correctness of this algorithm, and then achieve operability of the algorithm by using 10 kW three-level inverter which taking DSP2808 and CPLD as the core.更多还原