摘要
二极管箝位型(NPC)三电平逆变器在中、高压大容量功率变换装置中的需求越来越迫切,目前已成为研究的热点。讨论利用功率开关所生成的不同电压矢量优化合成旋转参考空间电压矢量及各矢量作用时间分配的方案,实现SVPWM控制策略驱动逆变器;讨论实时改变控制负小矢量作用时间的系数以平衡直流侧母线中点电位的问题。仿真结果验证了NPC三电平逆变器SVPWM控制策略的正确性及中点电位平衡控制的有效性。
Diode NPC （neutral-point-clamped） three-level inverter is increasingly and urgently needed for medium to high-voltage and large-capacity power conversion devices, and becomes a research hot spot at present. Three voltage vectors generated by power switches are used to optimally synthesize space rotary reference voltage victors by assigned action time to each voltage vector to realize SVPWM inverter. Meanwhile, the DC neutral-point voltage of inverter is balanced thorough real-time adjusting action time of small negative vectors. The simulation results validate that the SVPWM scheme is correct for controlling NPC three-level inverter and the balance of neural-point voltage is effective.
出处
《中国测试》
CAS
北大核心
2012年第5期75-79,共5页
China Measurement & Test
基金
北京信息科技大学基金项目(5026010929)
