US 12,428,972 B2
System and method for hydraulically actuating main and bypass valves of a steam turbine
Amit Laxmanrao Khamkar, Uttar Pradesh (IN); Arshad Amin Ansari, Uttar Pradesh (IN); and Shaurabh Banerjee, New Delhi (IN)
Assigned to GE Infrastructure Technology LLC, Greenville, SC (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Jul. 29, 2022, as Appl. No. 17/877,792.
Claims priority of application No. 202211030308 (IN), filed on May 26, 2022.
Prior Publication US 2023/0383672 A1, Nov. 30, 2023
Int. Cl. F01D 17/10 (2006.01)
CPC F01D 17/105 (2013.01) [F05D 2220/31 (2013.01); F05D 2260/606 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A system, comprising:
a hydraulic power unit, comprising:
a tank configured to store a hydraulic fluid;
a pump assembly configured to pump the hydraulic fluid from the tank to provide a pressurized hydraulic fluid;
an accumulator assembly configured to store the pressurized hydraulic fluid;
a main control system comprising one or more first hydraulic actuators coupled to one or more main valves;
a bypass control system comprising one or more second hydraulic actuators coupled to one or more bypass valves;
a trip system having one or more trip valves configured to control a supply of the pressurized hydraulic fluid in response to a turbine trip event of a steam turbine system, wherein the turbine trip event comprises a pressure drop in the pressurized hydraulic fluid below a pressure threshold; and
a header coupled to the pump assembly and the accumulator assembly, wherein the header is configured to supply the pressurized hydraulic fluid to the one or more first hydraulic actuators coupled to the one or more main valves and the one or more second hydraulic actuators coupled to the one or more bypass valves of the steam turbine system; and
a controller coupled to the hydraulic power unit, wherein the controller comprises a processor, a memory, and instructions stored on the memory and executable by the processor to control the hydraulic power unit to:
control the supply of the pressurized hydraulic fluid to at least meet or exceed first specifications of the one or more first hydraulic actuators of the one or more main valves and second specifications of the one or more second hydraulic actuators of the one or more bypass valves, wherein the first and second specifications are different from one another;
control the supply of the pressurized hydraulic fluid to the one or more first hydraulic actuators to actuate the one or more main valves to control a steam supply to flow through one or more steam turbines of the steam turbine system; and
control the supply of the pressurized hydraulic fluid to the one or more second hydraulic actuators to actuate the one or more bypass valves to control a bypass of the steam supply to not flow through the one or more steam turbines of the steam turbine system.