Driver de iluminação como carga inteligente para compensação de condições da rede

Abstract

The fast transition from a traditional centralized generation model to a new model – in which distributed generation becomes common-place and there’s a growing share of grid-tied inverters – raises concerns on the stability and overall energy quality of the electrical system. While most of the researchers seek solutions in the improvement of the interface between the grid and the generation sources, a considerable share of the systems electrical demand is interfaced to the grid though electronic converters. Controlling those loads in a way that they present compensatory characteristics can be beneficial to the systems stability. Loads that present such characteristics are called Smart Loads. Therefore, this work presents the development of acontrol strategy applied to a LED driver that turns it on a Smart Load. The DC bus capacitor, already a part of most LED drivers, is used as energy storage to decouple the instantaneous input and output power. The control structure measures the grid voltage and frequency, updating the driver’s input current so that it has a compensatory behavior. The load power is defined based on a filtered input power reference. A prototype was projected, simulated and early experimental results are presented.