| Abstract [eng] |
The aim of the final work is the analysis of the operation of a direct matrix frequency converter, which is in reactive power compensation mode. Controlled parameters are the phase shift angle of the input current and the voltage modulation coefficient. The matrix converter is controlled by the space vector modulation method, the correction to the variation of the network load is performed by the Fuzzy controller. At the beginning of the analysis, household LED bulbs, which are sources of reactive power, were investigated and the type of power they generated was determined. A model of a direct matrix converter in MATLAB / Simulink environment was developed depending on the loads. The model consisted of a three-phase AC source, a matrix 3x3 converter, asynchronous motor simulation block, an outdoor advertising display simulation block which consists of LEDs. After the research it was considered, that most LED devices, such as light bulbs, outdoor advertising screens, projectors, are generating reactive capacitive power, and existing network power compensation equipment does not have the capability to compensate for this type of reactive power. It has also been found that the matrix drive can be used as a source of positive or negative reactive power. Matrix drive compensation can be adaptive by using a Fuzzy controller. |
