基于改进型SVPWM的SAPF研究

Research of SAPF Based on Improved SVPWM

空间矢量脉宽调制(SVPWM)已被广泛地用在三相电压源逆变器(VSI)中,近来SVPWM技术也逐渐应用于有源电力滤波器(APF)控制方面。应用于APF的传统SVPWM由于复杂的三角计算,并且涉及到生成补偿信号扇区识别与作用时间的复杂计算,因此其补偿的响应时间是缓慢的。在传统的SVPWM控制基础上,基于有效时间概念提出,省略了扇区识别,简化了作用时间的复杂运算。从而减少了数字控制器的运算量,提高了其补偿速度。仿真与实验证明了基于改进型SVPWM的并联有源滤波器(SAPF)控制策略的有效性。

Space vector pulse width modulation（SVPWM）has been widely used in the three-phase voltagesource inverter（VSI）.Recently SVPWM technology is increasingly used in active power filter（APF）. The traditionalSVPWM based APF has a high computational burden because of the complex trigonometric calculations,sectoridentification and the calculation of reaction time,thus compensating the response time is slow. In the traditionalSVPWM control,the concept of effective time was omitted in the sector to identify and simplify the complexcomputing action time. Thereby reduced the amount of computation of the digital controller,which compensates forimproved speed. The simulation and experimental results show the effectiveness of the control strategy based onimproved SVPWM of shunt active power filte（r SAPF）.