Comparison of DC-Link Voltage Control Architectures on Grid-Side and Machine Side for Permanent Magnet Synchronous Generator Connected to the Grid.

Abstract

Energy production through wind power generation systems presents instability mainly due to wind variability the dynamic performance of the DC-Link is necessary for the proper operation of wind power plants using PMSG-based technologies, therefore, it is necessary to guarantee the efficient voltage control in the DC-Link in a back to back topology of the converters used for the energy conversion. This research compares the effect of implementing DC-Link voltage control on the Grid Side Converter versus DC-Link voltage control on the Machine Side Converter. The simulated system consists of a wind turbine coupled to the Permanent Magnet Synchronous Generator, Power Electronic Converters and the grid. Internal current controllers and external DC-link voltage control are designed for each case. The performance of the system against wind speed changes and voltage faults in the grid is evaluated and compared.