Dynamic Ramp Rate Control for Power Generation Transients
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electrical power generation systems face limitations in ramping rates and latency in responding to load changes, leading to inefficiencies and unnecessary resource usage, as they are often constrained by physical and mechanical limitations, as well as conservative engineering safety margins.
Innovation Solution
A system and method that dynamically control the ramp rate of electrical power generation by monitoring operating parameters such as throttle pressure, metal temperature, megawatt error, and opacity, using a distributed control system to adjust the output signals for boilers, turbines, and generators, allowing for more precise and efficient response to transient load demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the ramp rate is increased to respond faster to transient load demands, then the responsiveness and speed of power generation is improved, but the equipment may exceed safe operating limits and suffer from increased wear and tear
Solution Approach 1:
The patent implements dynamic ramp rate adjustment by continuously monitoring equipment operating parameters (metal temperatures, pressures, valve positions) and adapting the ramp rate in real-time. The system transitions from static manufacturer-specified ramp rates to dynamic, condition-based ramp rates that optimize responsiveness while maintaining equipment safety through continuous feedback control.
Solution Approach 2:
The system changes the operational parameters of the power generation equipment by adjusting the ramp rate based on monitored conditions. It modifies key parameters such as metal temperature rates of change, boiler pressures, and turbine valve positions to achieve optimal performance within safe operating envelopes, rather than adhering to fixed conservative limits.
2Productivity
If more generators are brought online to handle transient loads, then the system's capacity to meet load demands is improved, but the efficiency and resource utilization deteriorates due to unnecessary unit activation
Solution Approach 1:
The system performs preliminary actions by pre-heating equipment components and preparing systems for rapid load acceptance before transient demands occur. This includes pre-warming metal surfaces and preparing control systems, enabling faster response to load changes without requiring additional generator units, thereby improving both productivity and resource efficiency.
3Reliability
If conservative manufacturer-specified ramp rates are used, then equipment reliability and safety are improved, but the productivity and responsiveness to load changes deteriorates
Solution Approach 1:
The patent implements comprehensive feedback control by continuously monitoring equipment responses during ramping operations (metal temperature rates, pressure changes, valve positions) and using this information to dynamically adjust ramp rates. This closed-loop feedback system replaces open-loop conservative manufacturer specifications with adaptive, condition-based control that optimizes both safety and productivity.
Data Source
AI summary
In the context of electric power generation facilities, a system and method that enable control of maximum sustained rate of change in output to accommodate changing load conditions and to facilitate efficient use of system resources are disclosed. In accordance with aspects of the disclosed subject matter, a ramp rate for an electric generator source may be set, operating parameters may be monitored, rates of change or discrepancies of the operating parameters over time may be computed; and output signals may then be used selectively to control certain system components.