摘要
在6～10kV的高压变频领域，与传统拓扑结构相比，有源中点箝位型五电平（active neutral-point-clampedfive-1evel，ANPC-5L）逆变器具有很高的实用价值。针对传统五电平逆变器空间矢量脉宽调制（spac evector pulse width modulation，SVPWM）控制算法复杂、计算量大等缺点，研究一种基于线电压坐标系的SVPWM控制算法，通过进行坐标变换，减少对基本矢量的确定步骤，简化基本矢量对应作用时间的求解过程，并将其应用到ANPC-5L逆变器中，通过实验波形和电流谐波分析证明控制算法的正确性。结合ANPC-5L逆变器和新控制算法的特点，提出一种高效的中点电压平衡的控制算法，通过对中点电位的检测和判断计算出所需的开关序列及复用矢量的作用时间比值，实现中点电流流入与流出的平衡，进而达到控制中点电压平衡的目的。实验结果证明了该中点控制算法有效性。
The active neutral-point-clamped five-level （ANPC-5L） has the very high practical utility, especially in high voltage variable frequency field of 6kV tol0kV. A new SVPWM algorithm based on line voltage coordinate was studied to overcome shortcomings of the traditional algorithm. Through coordinate transformation, steps of determine basic vectors and the solution about the basic vector corresponding action time are simplified. It was applied to ANPC-5L inverter successfully and its correctness was proved by the experiment waveform and current harmonic analysis. Combined with the characteristics of ANPC-5L inverter and the new control algorithm, a kind of high efficient neutral-point voltage balance control algorithm had been put forward. Based on the judgment of neutral potential to calculate the required switch sequence and reuse vector action time ratio, the neutral current inflow and outflow balance and the purpose of control neutral-point voltage balance was achieved. The validity of the neutral-point control algorithm was proved by the experimental results.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2013年第30期26-33,6,共8页
Proceedings of the CSEE
基金
江苏省自然科学基金项目(BK2009526)~~
关键词
ANPC-5L逆变器
线电压坐标系
SVPWM
中点
电压平衡
active neutral-point-clamped five-level（ANPC-5L） inverter
line voltage coordinate
space vectorpulse width modulation （SVPWM）
neutral-point voltagebalance
