# US 12,006,807 B2 · Power distribution trailer for an electric driven hydraulic fracking system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,807 B2 - Document ID: US12006807B2 - Status: Granted - Kind: B2 - Application number: 18/371,262 - Filed: 2023-09-21 - Published: 2024-01-11 - Granted: 2024-06-11 - Earliest claimed: 2019-02-14 - Assignees: Halliburton Energy Services, Inc. - Applicants: Halliburton Energy Services, Inc. - Inventors: John Fischer; John J. Crosetto; David Kubricht; Richard Cheatham; Jeffrey Pollack; Chad Lawman; David Todd; Tyler Nolen - Web page: https://patentgrep.com/patent/US12006807B2 ## CPC - E21B 43/2607: {Surface equipment specially adapted for fracturing operations} - F04D 13/12: Combinations of two or more pumps (combinations with priming pumps or booster pumps to counteract vapour-lock F04D9/04) - F04B 17/03: driven by electric motors - F04B 17/06: Mobile combinations - F04B 47/02: the driving mechanisms being situated at ground level (F04B47/12 takes precedence) - F04D 13/068: {Battery powered} - F04D 13/0686: {Mechanical details of the pump control unit (pump control F04D15/00)} - H02J 13/34: the equipment being switches, relays or circuit breakers - H02K 7/18: Structural association of electric generators with mechanical driving motors, e.g. with turbines - H02P 5/00: Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors (H02P6/04, H02P8/40 take precedence) - H02P 27/04: using variable-frequency supply voltage, e.g. inverter or converter supply voltage - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS ## Abstract An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. A power distribution trailer distributes the electric power generated by the power generation system at the power generation voltage level to the single VFD and converts the electric power at a power generation voltage level to a VFD voltage level and controls the operation of the single shaft electric motor and the single hydraulic pump. The power distribution trailer converts the electric power generated by the power generation system at the power generation level to an auxiliary voltage level that is less than the power generation voltage level. The power distribution trailer distributes the electric power at the auxiliary voltage level to the single VFD that controls an operation of the of the auxiliary systems. ## Claims ### Claim 1 An electric driven hydraulic fracking system for pumping a fracking media into a fracking well to execute a fracking operation to extract a fluid from the fracking well, comprising: a power distribution trailer configured to: receive electric power from a power generation system at a power generation voltage level, wherein the power generation voltage level is a voltage level that the power generation system is capable of generating, and distribute the electric power from the power generation system at the power generation voltage level to a Variable Frequency Drive (VFD) to control an electric motor and a hydraulic pump; and the power distribution trailer includes an auxiliary system transformer that is configured to: convert the electric power that is generated by the power generation system at the power generation voltage level to an auxiliary voltage level that is less than the power generation voltage level, and distribute the electric power at the auxiliary voltage level to the VFD, wherein the electric power at the auxiliary voltage level pre-magnetizes a VFD transformer associated with the VFD before the VFD is activated with the electric power at the power generation voltage level to decrease an in-rush of current due to the VFD being activated by the electric power at the power generation voltage level thereby decreasing a propagation of the in-rush of current from propagating back to the power generation system. ### Claim 2 (depends on 1) The electric driven hydraulic fracking system of claim 1, wherein the auxiliary system transformer is further configured to isolate the VFD from the electric power at the power generation voltage level as distributed by the power generation trailer with the electric power at the auxiliary voltage level as the VFD transformer is pre-magnetized at the auxiliary voltage level thereby decreasing the propagation of the in-rush of current from propagating back to the power generation system. ### Claim 3 (depends on 2) The electric driven hydraulic fracking system of claim 2, wherein the auxiliary system transformer is further configured to pre-charge a plurality of capacitors associated with the VFD as the VFD transformer is pre-magnetized with the electric power at the auxiliary voltage level thereby isolating the VFD from the electric power at the power generation voltage level as distributed by the power distribution trailer. ### Claim 4 (depends on 3) The electric driven hydraulic fracking system of claim 3, wherein the auxiliary system transformer is further configured to: pre-charge the plurality of capacitors associated with the VFD to a voltage threshold of the electric power at the power generation voltage level as the VFD transformer is pre-magnetized with the electric power at the auxiliary voltage level, wherein the voltage threshold is a pre-charge of the plurality of capacitors that is a percentage of the electric power at the power generation voltage level that when the VFD is activated decreases the propagation of the in-rush of current from propagating back to the power generation system. ### Claim 5 (depends on 4) The electric driven hydraulic fracking system of claim 4, wherein the auxiliary system transformer is further configured to: transition an exposure of the VFD from the electric power at the auxiliary voltage level to the electric power at the power generation voltage level as distributed by the power distribution trailer when the plurality of capacitors is pre-charged to the voltage threshold of the electric power at the power generation level thereby decreasing the propagation of the in-rush of current from propagating back to the power generation system. ### Claim 6 (depends on 5) The electric driven hydraulic fracking system of claim 5, wherein the power distribution trailer distributes the electric power at the power generation voltage level to the VFD thereby enabling the VFD to control the electric motor and the hydraulic pump after the VFD is transitioned from the electric power at the auxiliary voltage level to the electric power at the power generation voltage level thereby decreasing the propagation of the in-rush of current from propagating back to the power generation system. ### Claim 7 A method for an electric driven hydraulic fracking system to pump a fracking media into a well to execute a fracking operation to extract a fluid from the well, comprising: receiving electric power from a power generation system at a power generation voltage level, wherein the power generation voltage level is a voltage level that the power generation system is capable of generating; converting the electric power that is generated by the power generation system at the power generation voltage level to an auxiliary voltage level that is less than the power generation voltage level; and distributing the electric power at the auxiliary voltage level to a Variable Frequency Drive (VFD), wherein the electric power at the auxiliary voltage level pre-magnetizes a VFD transformer associated with the VFD before the VFD is activated with the electric power at the power generation voltage level to decrease an in-rush of current due to the VFD being activated by the electric power at the power generation voltage level thereby decreasing a propagation of the in-rush of current from propagating back to the power generation system. ### Claim 8 (depends on 7) The method of claim 7, further comprising: isolating the VFD from the electric power at the power generation voltage level with the electric power at the auxiliary voltage as the VFD transformer is pre-magnetized at the auxiliary voltage level thereby decreasing the propagation of the in-rush of current from propagating back to the power generation system. ### Claim 9 (depends on 8) The method of claim 8, further comprising: pre-charging a plurality of capacitors associated with the VFD as the VFD transformer is pre-magnetized with the electric power at the auxiliary voltage level thereby isolating the VFD from the electric power at the power generation voltage level. ### Claim 10 (depends on 9) The method of claim 9, further comprising: pre-charging the plurality of capacitors associated with the VFD to a voltage threshold of the electric power at the power generation voltage level as the VFD transformer is pre-magnetized with the electric power at the auxiliary voltage level, wherein the voltage threshold is a pre-charge of the plurality of capacitors that is a percentage of the electric power at the power generation voltage level that when the VFD is activated decreases the propagation of the in-rush current from propagating back to the power generation system. ### Claim 11 (depends on 10) The method of claim 10, further comprising: transitioning an exposure of the VFD from the electric power at the auxiliary voltage level to the electric power at the power generation voltage level as distributed by the power distribution trailer when the plurality of capacitors is pre-charged to the voltage threshold of the electric power at the power generation level thereby decreasing the propagation of the in-rush of current from propagating back to the power generation system. ### Claim 12 (depends on 11) The method of claim 11, further comprising: distributing the electric power at the power generation voltage level to the VFD thereby enabling the VFD to control the electric motor and the—a hydraulic pump after the VFD is transitioned from the electric power at the auxiliary voltage level to the electric power at the power generation voltage level thereby decreasing the propagation of the in-rush current from propagating back to the power generation system. ### Claim 13 An electric driven hydraulic fracking system for pumping a fracking media into a fracking well to execute a fracking operation to extract a fluid from the fracking well, comprising: a power distribution trailer configured to: receive electric power from a power generation system at a power generation voltage level, wherein the power generation voltage level is a voltage level that the power generation system is capable of generating, and distribute the electric power from the power generation system at the power generation voltage level to a plurality of Variable Frequency Drives (VFD), wherein each VFD controls a corresponding electric motor from a plurality of electric motors and a corresponding hydraulic pump from a plurality of hydraulic pumps; and the power distribution trailer includes an auxiliary system transformer configured to: convert the electric power that is generated by the power generation system at the power generation voltage level to an auxiliary voltage level that is less than the power generation voltage level, and distribute the electric power at the auxiliary voltage level to the plurality of VFDs, wherein the electric power at the auxiliary voltage level pre-magnetizes a plurality of VFD transformers associated with the plurality of VFDs before each VFD is activated with the electric power at the power generation voltage level to decrease an in-rush of current due to each VFD being activated by the electric power at the power generation voltage level thereby decreasing a propagation of the in-rush of current from propagating back to the power generation system. ### Claim 14 (depends on 13) The electric driven hydraulic fracking system of claim 13, wherein the auxiliary system transformer is further configured to isolate each VFD from the electric power at the power generation voltage level as distributed by the power generation trailer with the electric power at the auxiliary voltage level as each corresponding VFD transformer is pre-magnetized at the auxiliary voltage level thereby decreasing the propagation of the in-rush of current from propagating back to the power generation system. ### Claim 15 (depends on 14) The electric driven hydraulic fracking system of claim 14, wherein the auxiliary system transformer is further configured to pre-charge a plurality of capacitors associated with each VFD as each corresponding VFD transformer is pre-magnetized with the electric power at the auxiliary voltage level thereby isolating each VFD from the electric power at the power generation voltage level as distributed by the power distribution trailer. ### Claim 16 (depends on 15) The electric driven hydraulic fracking system of claim 15, wherein the auxiliary system transformer is further configured to: pre-charge the plurality of capacitors associated with each VFD to a voltage threshold of the electric power at the power generation voltage level as each corresponding VFD transformer is pre-magnetized with the electric power at the auxiliary voltage level, wherein the voltage threshold is a pre-charge of the plurality of capacitors that is a percentage of the electric power at the power generation voltage level that when each VFD is activated decreases the propagation of the in-rush of current from propagating back to the power generation system. ### Claim 17 (depends on 16) The electric driven hydraulic fracking system of claim 16, wherein the auxiliary system transformer is further configured to: transition an exposure of each VFD from the electric power at the auxiliary voltage level to the electric power at the power generation voltage level as distributed by the power distribution trailer when the plurality of capacitors is pre-charged to the voltage threshold of the electric power at the power generation level thereby decreasing the propagation of the in-rush of current from propagating back to the power generation system.