Ultra Wide Band (UWB) radio frequency method for allocating partial discharge (PD) is a new method for PD source localization on power transformers which is based on diamond shape multi-antenna PD detection and Huygens-Fresnel principle. Preparing a simulation environment is the first step to achieve this goal. In this paper, a three-dimensional simulation is performed using CST software and the PD source current is simulated. According to the results, this software is helpful for simulation of PD allocation using UWB signals with time difference of arrival (TDOA) method.