US 12,345,144 B2
Automatically controlling a power ramp rate of a motor of a pump system
Andy Publes, Katy, TX (US); Mark Francis Grimes, Cypress, TX (US); Riadh Benguedda, Cypress, TX (US); Yuesheng He, Sugar Land, TX (US); Mark C Paul, Carmel, IN (US); and Todd Ryan Kabrich, Tomball, TX (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Mar. 11, 2022, as Appl. No. 17/654,515.
Prior Publication US 2023/0287775 A1, Sep. 14, 2023
Int. Cl. E21B 43/26 (2006.01); F04B 49/06 (2006.01); F04B 49/20 (2006.01)
CPC E21B 43/2607 (2020.05) [F04B 49/065 (2013.01); F04B 49/20 (2013.01); F04B 2203/0204 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for hydraulic fracturing, comprising:
a pump system that includes:
a fluid pump,
a motor configured to drive the fluid pump, and
a variable frequency drive (VFD) configured to control the motor;
one or more power sources configured to provide power to the pump system via a power bus; and
a controller configured to:
identify initiation of a ramp up period of the fluid pump;
cause, based on identifying the initiation of the ramp up period of the fluid pump and via the VFD, a power ramp rate of the motor to have an initial power ramp rate;
monitor, during the ramp up period of the fluid pump, a frequency of the power bus;
determine, based on monitoring the frequency of the power bus, whether the frequency of the power bus satisfies a frequency threshold; and
cause, based on determining that the frequency of the power bus satisfies the frequency threshold, and via the VFD, a decrease of the power ramp rate of the motor.