有效降低APF开关损耗的滞环宽度调节方法  

Method of reducing APF switching loss with adjustment of hysteresis width

作　　者：曾江[1] 陈浩平[1] 刘艳[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《电气传动自动化》2015年第6期15-20,共6页Electric Drive Automation

摘　　要：提出一个新评价函数和根据该评价函数调节滞环宽度的方法,可有效降低有源滤波器的开关损耗。该方法分析了三相平均电流、各相电流和滞环宽度三者间的关系,并根据此关系调整各相滞环宽度,使开关损耗较大的相开关频率降低,开关损耗较小的相开关频率提高,从而保持总的控制精度同时降低开关损耗。最后利用PSCAD/EMTDC进行仿真,结果表明本方法在不明显增加总的开关频率的情况下,可以有效降低有源滤波器的开关损耗,且不影响控制精度。Based on a new evaluation function,the novel method of adjusting hysteresis width is presented,which can effectively reduce the switching loss of the active filter. The method adjusts hysteresis band width according to the relationship between the current sizes of three-phase and each phase,and adjusts each phase by comparing the output reference current to reduce the switching times which switching losses is larger,while increasing the switching frequency which switching losses is smaller,so as to maintain overall control precision. Computer simulation is also given. The simulation results show that this new method can effectively reduce the switching loss under the same control accuracy and total switching frequency.

关 键 词：有源滤波器 滞环电流控制 开关损耗 滞环宽度调节 

分 类 号：TN713.8[电子电信—电路与系统]