Research on the parallel hybrid active power filter

Many problems are caused by harmonic pollution, such as lower power factor and bigger loss, even power system will be paralytic. In order to solve the above problems, the most effective strategy of improving electric quality is adopts the APF that can compensate harmonics dynamicly. This paper presents an improved type of parallel hybrid active power filter structure, using compound control method, can be a good solution to the capacity-constrained active power filter issue.