Estudo comparativo sobre sistemas de sincronização em relação ao desempenho de uma turbina tipo III

Abstract

Synchronization systems are control algorithms used to detect some of the main variables in the electrical grid. They are able to track variables such as the phase angle, frequency, and sequence components of the voltage phasor of the electrical grid. In this sense each of these variables are necessary information which are used in the control systems of distributed generation power converters. It is through this information that converters are able to ensure the integration of the generation systems with the electrical grid, guaranteeing a continuous flow of power transfer. In this way, with the increased demand for distributed generation, for energy renewable sources and with the existence of increasingly demanding grid codes, several studies have been developed in the area of synchronization systems. In this work, a comparative study between two synchronization systems was developed: the Modified Dual Second Order Generalized Integrator - Frequency Locked Loop (MDSOGI-FLL) and the Modified Second Order Sequence Filter (MSOSF). To introduce the subject, some of the main synchronization systems in the literature were initially presented. In addition, the MDSOGI-FLL and MSOSF were analyzed, in isolation, with some common disturbances of the electrical grid, in order to verify their synchronization functions and the filtering capability of each of the systems. Subsequently, a deepening was done in relation to the structure and characteristics of a type 3 wind turbine system, which is the most used type of turbine system in the wind energy area. Finally, the application and analysis of the two synchronization systems was carried out in the simulation of a type 3 turbine system, where disturbances involving voltage unbalances and voltage harmonic components were applied. The simulation environment used to carry out all the tests in the study was PSCAD EMTDC.