Switchgear Load Sharing for Oil Field Turbines
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Solution Overview
Problem
Hydraulic fracturing operations face challenges in managing unpredictable power demands due to fluctuating wellhead pressure and fluid rates, making it difficult to maintain consistent turbine output and leading to inefficiencies and potential equipment failures.
Innovation Solution
A system that utilizes a microgrid with multiple electric pumps and generators, along with switchgear and a tie breaker, to distribute electrical loads evenly among generators, allowing for flexible operation and efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If turbines operate at higher loads to improve efficiency, then energy efficiency improves, but reliability deteriorates due to unpredictable power demands and fluctuating wellhead pressure
Solution Approach 1:
The system divides the electrical load into multiple independent segments, each controlled by its own switchgear unit. This segmentation allows individual load management without affecting the entire turbine system, enabling turbines to operate at optimal loads while maintaining reliability through isolated fault containment and flexible load redistribution.
Solution Approach 2:
The switchgear units dynamically adjust electrical load distribution in real-time based on turbine operating conditions, wellhead pressure fluctuations, and power demand variations. This dynamic control enables turbines to operate at efficient higher loads while the system adapts to unpredictable changes, preventing reliability issues through continuous optimization.
2Power
If multiple generators are used to meet peak power demands, then power capacity increases, but device complexity increases
Solution Approach 1:
Each switchgear unit is designed as a multi-functional component that can independently connect to multiple generators, distribute electrical loads, provide fault isolation, and enable flexible system reconfiguration. This universal design allows the system to scale power capacity by adding generators without proportionally increasing complexity, as each switchgear unit handles multiple functions simultaneously.
Solution Approach 2:
The system implements partial load sharing among generators through independent switchgear units, allowing each generator to operate at optimized partial loads rather than requiring all generators to run at full capacity. This approach meets peak power demands through coordinated partial actions of multiple generators while simplifying control through modular switchgear management.
Data Source
AI summary
A hydraulic fracturing system for fracturing a subterranean formation is disclosed. In an embodiment, the system may include a plurality of electric pumps fluidly connected to a well associated with the subterranean formation and powered by at least one electric motor, and configured to pump fluid into a wellbore associated with the well at a high pressure so that the fluid passes from the wellbore into the subterranean formation and fractures the subterranean formation; at least one generator electrically coupled to the plurality of electric pumps so as to generate electricity for use by the plurality of electric pumps; and at least one switchgear electrically coupled to the at least one generator and configured to distribute an electrical load between the plurality of electric pumps and the at least one generator.