Electrical Noise Simulation: A Practical Approach for ATP/ATPDraw Studies

This paper presents a practical approach to simulate electrical noise during Electromagnetic Transients Program (EMTP) studies using the Alternative Transients Program (ATP) via ATPDraw interface. The proposed solution is able to superpose any precalculated noise signal over voltages and currents directly in ATP environment. As a result, electrical signals can be exported already considering the presence of noise, significantly simplifying the signal adaptation procedures. Firstly, the methodology to create noise patterns is described, and MATLAB routines to do so are presented. Then, the proposed ATPDraw noise emulation circuit is explained and demonstrated by analyzing records obtained from simulations of a 230 kV/60 Hz transmission line. The obtained results show that different noise levels can be easily simulated by using the proposed approach, which is thus attractive for power systems ATP/ATPDraw studies.