Analysis of methods to form discrete zone in converters with multi-zone control of output parameters

Authors: Avdzeyko V. I., Drozdova A. A., Rulevskiy V. M., Lyapunov D. Yu.

Annotation: Power supplies operating in the key mode of operation create a pulsed character of current consumption, leading to current and voltage ripples in the supply network and at the input of con-nected consumers. Conventional converter circuits are based on single-cycle converters or inverters with full range of output parameters regulation. Power elements of these converters are calculated for the full power of the converted electrical energy, and at the output of the regulated inverter a pulse voltage is formed, the amplitude and duration of which have a significant impact on the parameters of input and output filters. One of the efficient ways to reduce this influence is the method of multi-zone regulation is based on the division of the regulation range into several zones. In the article, a comparative analysis of the given variants of converters is carried out in terms of the current ripple spread of inductors and voltage on filter capacitors, of the current value of keys, as well as of the conditions of intermittent currents occurrence depending on the number of zones. The advantage of dividing the control range into zones with uniform quantisation step is proved, as well as the efficiency of these schemes in comparison with converters with full and incom-plete modulation depth of the regulated parameter. The analysis of schemes variants with uniform and non-uniform quantisation steps is carried out on the models built with the help of MATLAB Simulink software.

Keywords: regulation range, intermittent currents, pulse component, multi-zone regulation, current and voltage ripple, converter