Patent ID: 11939828
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC E  F  H | IPC E  F  H

Claim 16:
17. The electric driven hydraulic fracking system of claim 16, wherein the plurality of VFD configurations further comprises:
a plurality of VFD transformers with each VFD transformer associated with a corresponding VFD configuration and configured to:
apply a phase shift to a plurality of phase changing sinusoidal signals included in the AC voltage signal associated with the electric power at the power generation voltage level that is generated by the power generation system and received by each corresponding VFD configuration, and

convert the AC voltage signal associated with the electric power at the power generation voltage level to the VFD voltage signal at the VFD voltage level based on the phase shift of each of the sinusoidal signals included in the AC voltage signal associated with the electric power at the power generation voltage level to mitigate the level of harmonics in the VFD current waveform included in the VFD voltage signal at the VFD voltage level, wherein the isolation of each VFD cell from each other VFD cell for each corresponding VFD configuration enables the VFD transformer to provide the phase shift to the phase changing sinusoidal signals included in the AC voltage signal associated with the electric power at the power generation voltage level.