Modelling the back-to-back power converter for WPGS in the load flow solution by Newton’s method

Resumo

This paper presents the steady state modelling of a Wind Power Generation System (WPGS) by using the load flow technique. To be connected to the grid, the WPGS demands the use of a power converter in a back-to-back configuration. The load flow technique requires the use of electrical components and nodal analysis where voltages are the unknown variables, referred to as slack, PV and PQ buses. In this work, the back-to-back power converter is modelled as an interface between the WPGS and the AC-60Hz grid. Simulation results are used to validate the model by using the parameters of a fraction of a WPGS plant located in the northeast of Brazil.