基于LLCL滤波器的SAPF输出特性分析及控制  

Output Characteristic Analysis and Control of SAPF Based on LLCL Filter

作　　者：武光华 李宏胜 柳长发 付立衡 WU Guang-hua;LI Hong-sheng;LIU Chang-fa;FU Li-heng(State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang 050000,China)

机构地区：[1]国网河北省电力有限公司,河北石家庄050000

出　　处：《电力电子技术》2023年第10期60-64,共5页Power Electronics

摘　　要：LLCL型滤波器通过电感和电容发生串联谐振滤除开关纹波,在使用更小电感量的情况下,可以获得比LCL型滤波器更好的滤波效果。这里总结了并联型有源电力滤波器(SAPF)中LLCL型滤波器的参数设计方法,对无源阻尼谐振的特点进行了分析,提出在保证系统稳定的前提下,尽量减小阻尼电阻值以保持高开关纹波衰减能力。在此基础上,进一步在电流控制方面提出采用广义积分控制(GIC)实现了补偿电网电流中50次以内奇次谐波的效果。最后通过实验证明了LLCL型滤波器以及广义积分控制器的作用和效果。The LLCL filter filters out the switching ripple by series resonance through the inductor and capacitor,which can obtain better filtering effect than the LCL filter under the condition of using a smaller inductance.The parameter design method of LLCL filter in the application of shunt active power filter(SAPF)is summarized,and the characteristics of passive damping resonance are analyzed.It is proposed that on the premise of ensuring the stability of the system,the damping resistance value should be reduced as far as possible to maintain high switching ripple attenuation ability.In the aspect of control,generalized integral control(GIC)is used to compensate the odd harmonics within 50 times.Finally,the function and effect of LLCL filter and generalized integral controller are proved by experiments.

关 键 词：并联型有源电力滤波器 无源阻尼谐振 广义积分控制 

分 类 号：TN713[电子电信—电路与系统]