Abstract: System for hydraulic fracturing is provided. A generator (22) directly coupled to a gas turbine engine (24) without a rotational speed reduction device. Thus, generator (22) may operate at relatively high-speeds and may involve state-of-the art electromotive technologies, such as may include switched reluctance generators (SRG), synchronous reluctance generators (SynRG) or permanent magnet generators (PMG). Power circuitry (30) may be arranged to receive electric power generated by generator (22) and may be electrically connectable to a power bus (32). Gas turbine engine 24), generator (22) and power electronics circuitry (30) may each be respectively mounted onto a power generation mobile platform (34), and in combination constitute a mobile power-generating subsystem (20) that may be operationally arranged in combination with one or more hydraulic fracturing subsystems (50), mobile or otherwise, that can similarly take advantage of such electromotive technologies for motoring purposes.

Abstract: System for hydraulic fracturing is provided. The system may involve a mobile hydraulic fracturing subsystem including a variable frequency drive (VFD) (12) electrically coupled to a generator (50). An electric motor (14) is driven by VFD (12). Harmonic mitigation circuitry (16) is configured to mitigate harmonic distortion by VFD (12). A hydraulic pump (20) is driven by motor (14) to deliver a pressurized fracturing fluid. VFD (12), harmonic mitigation circuitry (16), motor (14) and hydraulic pump (20) may be arranged on a mobile platform (24) so that a subsystem so arranged can be transportable from one physical location to another. In some disclosed embodiments, the hydraulic fracturing subsystem may be fitted on mobile platform (24) having size and weight not subject to laws or regulations requiring a permit and/or accompaniment by an escort vehicle to travel on a public highway, such as public highways in the United States and/or Canada.

Abstract: System 10 for hydraulic fracturing is provided. The system may involve a mobile hybrid power-generating subsystem (25) including a gas turbine engine 14 and an electrical energy storage system 16. Power-generating subsystem (25) further including an electromotive machine 12 that may be configured to operate in a motoring mode or in a generating mode. During motoring, electromotive machine 12 may be responsive to electrical power from energy storage system 16 to provide black start of gas turbine 14. Gas turbine engine 14, electrical energy storage system 16 and electromotive machine 12 may be arranged on a power generation mobile platform (22) so that a subsystem so arranged can be transportable from one physical location to another, and effectively constitutes a self-contained, mobile hybrid power-generating subsystem that may operate fully independent from utility power or external power sources.

Abstract: System 10 for hydraulic fracturing is provided. The system may include a mobile hybrid power-generating subsystem (25) including a gas turbine engine (14) and an electrical energy storage system (16). Power-generating subsystem (25) further including an electromotive machine (12), such as a switched reluctance electromotive machine or a permanent magnet electromotive machine, in either case having a rotor shaft coupled to a main shaft of the gas turbine engine without a rotational speed reduction device. A power bus (15) being powered by the electrical energy storage system and/or the electromotive machine (12).