Design criterion for an interfacing converter with reactive power compensation capability applied to a DC lighting system

This paper shows a design criterion for an interfacing converter, which has the functions of controlled rectification and reactive power compensation. The proposed design methodology aims to forecast the power limits of the converter based on the features of the line, the AC load, which is intended to be compensated, and the DC loads. Furthermore, a control strategy was proposed in order to ensure that the converter always operates inside its capability curve, guaranteeing its proper operation. An application using the proposed technique to design a 3-leg VSC interfacing a DC lighting bus and the AC grid was used as an example. A computational simulation was done aiming the validation of the proposed design methodology as well as evaluating the performance of the control strategy.