This paper provides the numerical model and simulation method （PSIM simulation package） for the research and development of parallel hybrid active power filter（HAPE）. Comparing with PSB simulation software

which is used extensively at present

it offers faster calculation speed and more friendly user interface. PSIM provides a cost-effective and powerful solution to analysis and design power converter systems. Taken practical project of Shaoye harmonic treatment system as an example

how to set up the simulation model of parallel-HAPF based on PSIM is introduced in detail

which includes the whole scheme design

and the selection of main circuit parameters （inductance and capacitance etc）. The design scheme has been applied in the industrial application

and the practical experimental results show the design of PSIM is reliable.