Running Train Aero Power System (Figure 2) for generating electricity by harnessing wind energy and method is disclosed. This system generates electricity using wind energy while running a vehicle. This power generating system comprising of two wheels shaped fan attached on both sides of the generator and further connected to grid tie inverter through AC-DC rectifier. This system can be placed on the top of a vehicle and make use of the harnessed energy for the purpose of that particular vehicle. In addition, a domestic, as well as industrial purpose plant making use of a running train exclusively over a permanent circular track, is also disclosed.