Back-to-back converter control of grid-connected wind turbine to mitigate voltage drop caused by faults

Abstract

Abstract-Power electronic converters enable wind turbines, operating at variable speed, to generate electricity more efficiently. Among variable speed operating turbine generators, permanent magnetic synchronous generator (PMSG) has got more attentions due to low cost and maintenance requirements. In addition, the converter in a wind turbine with PMSG decouples the turbine from the power grid, which favors them for grid codes. In this paper, the performance of back-to-back (B2B) converter control of a wind turbine system with PMSG is investigated on a faulty grid. The switching strategy of the grid side converter is designed to improve voltage drop caused by the fault in the grid while maximum available active power of wind turbine system is injected to the grid and the DC link voltage in the converter is regulated. The methodology of the converter control is elaborated in details and its performance on a sample faulty grid is assessed through simulation.Index Terms--Back-to-back (B2B) converter, direct-in-line wind turbine, permanent magnetic synchronous generator (PMSG), voltage drop, wind turbine control.

Nine Switch Back To Back Converter- Design and Simulation for Wind Turbines Based on Doubly Fed Induction Generator

“…The generators must be controlled for this to happen. Electricity generated through wind turbines is widely used in distributed generation systems [2,3].…”

State space modeling of inverter based microgrids considering distributed secondary voltage control

“…icrogrids (MGs) are a smaller scale of power systems that integrate high penetration of renewable energies and energy storage systems (ESSs) into the grid [1][2][3][4][5][6]. Power electronic converters are used as the interface between renewable energies such as solar power, wind power and fuel cells and the grid [7][8][9]. Utilizing renewable energies in MGs as well as the flexibility of MGs in connecting and disconnecting to/from the grid is counted as two main advantages of MGs over the conventional power systems.…”