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MATAKAS JUNIOR, L. Controller Implementation for Three Phase Power Converters Without Coordinate Transformations: Geometric Analysis Based on Space Vectors. 2012. Texto (Livre Docência) – Escola Politécnica, Universidade de São Paulo, São Paulo, 2012. The objective of this text is to discuss strategies for the implementation of the control loops of grid connected three phase self-commutated converters. It is carried out by directly using measurements from the abc three phase system, without coordinate transformations. These controllers can be applied to grid disturbance compensators and power conditioners. The text discusses the controller blocks, including: the pulse width modulator (PWM), the loops for current and voltage tracking, the synchronization loops (phase locked loop PLL) and the algorithms for calculating the disturbances in the grid currents and voltages. The last ones are used for the generation of the converter reference signals. The common point in the discussion of the controller blocks is the use of space vectors for a geometrical based analysis of the algorithms. It reviews the space vector and the instantaneous Power (pq) theories, that support the geometrical analysis. Moreover, it reviews strategies for calculating the compensator reference signals, based on both theories. These strategies are compared to the proposed ones, based on the evaluation of vectors dot product, directly in the abc system.

Implementação de controladores para conversores trifásicos, sem transformações de coordenadas: análise geométrica através de vetores espaciais.