Generator Control Computer Device for Steady State Stability Limits
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Solution Overview
Problem
Power plant generators operate at suboptimal capacity due to thermal constraints and worst-case impedance calculations, leading to inefficient active and reactive power production, especially in weak grids and end-of-line generators.
Innovation Solution
A generator control computer device that monitors grid impedance in real-time, calculates current steady-state stability limits, and adjusts generator operation based on these limits to maximize safe power output, using sensors and advanced filtering techniques like Kalman Filters and Singular Value Decomposition to correct for noise and errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If generators are operated at maximum capacity based on thermal constraints, then power output is maximized, but the generator may trip due to steady state stability violations under worst case impedance conditions
Solution Approach 1:
The system dynamically adjusts the steady state stability limit based on real-time grid impedance conditions. Instead of using a fixed worst-case impedance value, the controller continuously monitors grid conditions and updates the stability limit to reflect current system state, allowing generators to operate at maximum capacity when conditions permit while maintaining stability when impedance increases
Solution Approach 2:
The system implements feedback by continuously monitoring grid impedance and using this information to adjust the steady state stability limit. The controller receives real-time data about grid conditions and modifies operational parameters accordingly, creating a closed-loop control system that adapts to changing conditions to prevent tripping while maximizing output
2Reliability
If generators operate using worst case impedance calculations, then stability is maintained, but the generator operates at suboptimal capacity during normal conditions
Solution Approach 1:
The steady state stability limit transitions from a static worst-case value to a dynamic parameter that changes with grid conditions. The system continuously updates the stability limit based on real-time impedance measurements, allowing the generator to operate at higher capacity during normal low-impedance conditions while automatically reducing output when impedance increases to maintain stability
Solution Approach 2:
The system changes the operational parameter (steady state stability limit) based on grid impedance conditions. By monitoring impedance and adjusting the stability limit parameter accordingly, the system allows the generator to operate at maximum capacity when impedance is low while maintaining stability when impedance increases, resolving the trade-off between productivity and reliability
3Productivity
If real-time grid impedance monitoring is implemented, then optimal power output is achieved, but system complexity increases
Solution Approach 1:
The system uses the generator's existing measurements and control infrastructure to determine grid impedance. By leveraging data already being collected for other control purposes and using the generator's own operational characteristics to infer impedance, the system achieves real-time monitoring without requiring extensive additional hardware or complex external measurement systems
Data Source
AI summary
A generator control computer device for operating at least one generator attached to a grid is provided. The generator control computer device includes at least one processor in communication with at least one memory device. The generator control computer device is configured to receive, from at least one sensor, a plurality of sensor readings representing one or more conditions of the at least one generator, calculate a current grid impedance of the grid based on the plurality of sensor readings, determine a steady state stability limit for the at least one generator based on the current grid impedance, and adjust operation of the at least one generator based on the determined steady state stability limit.