Using LMS algorithm for controlling the active power of nonlinear loads

In this paper is proposed an adaptive control method of the active power of a nonlinear load. One of the most representative nonlinear loads is the Electric Arc Furnace (EAF). Based on the experimental results will be proposed an adaptive control system of the process. The algorithm used is known as the LMS algorithm (Least Mean Square) being, due to its simplicity, the most used algorithm implemented in controlling systems. It was used standard and variable step size LMS algorithm. The efficiency of the proposed algorithms is verified using simulations based on modeling the electric arc. For modeling the electric arc it was used a model having parameters like of a real electric arc. For simulation it was use the PSCAD-EMTDC program (Power Systems CAD - a program dedicated to power systems).