Generator Torque Oscillation Control via Auxiliary Power Compensator
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Solution Overview
Problem
Aero engine electrical systems experience damaging torque oscillations due to large, non-linear, and pulse loads, which existing control systems fail to address effectively, leading to potential damage in mechanical drive trains and generators.
Innovation Solution
A method and system that monitor electrical network conditions and use an auxiliary power source to adjust power, employing a compensator with a controller, converter, and network interface to reduce or eliminate torque oscillations by compensating for changes in load conditions independently of the generator, allowing for quicker reaction to load changes and avoiding delays caused by inertia.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the generator reacts to meet changes in electrical load demand, then the electrical power supply is maintained, but torque oscillations occur in the mechanical drive train due to electrical and mechanical inertia causing delays in correction
Solution Approach 1:
The compensator detects changes in electrical load demand and adjusts power output in advance before the generator's inertia causes delayed response. By performing preliminary action through the compensator, the system prevents torque oscillations from developing in the mechanical drive train while maintaining stable electrical power supply.
2Power
If the generator corrects for changes in load condition, then power balance is maintained, but the response is delayed due to large time constant of the system
Solution Approach 1:
The compensator acts as an intermediary between the electrical load and the generator. It detects load changes and provides immediate power adjustment through its converter and auxiliary power supply, bypassing the delayed response mechanism of the generator. This intermediary action maintains power balance without the time delay inherent in generator response.
3Stability of the object's composition
If mechanical drive trains accommodate small variations in torque, then the system operates smoothly, but damaging torque oscillations occur when large non-linear and pulse loads are applied
Solution Approach 1:
The system continuously monitors electrical load demand and feeds this information back to the compensator controller. The controller processes this feedback and adjusts the compensator's power output accordingly, providing real-time compensation that prevents torque oscillations from reaching levels that could damage mechanical drive train components while maintaining stable operation.
Data Source
AI summary
This invention relates to a method of controlling torque oscillations in a mechanical drive train of an electrical generation system which provides electrical power to an isolated electrical network, the method including the steps of: a. monitoring for changes in the electrical condition of the electrical network; b. determining whether a change in the electrical condition of the network falls within a predetermined range; c. adjusting the power in the network using an auxiliary power source when the electrical condition of the network falls within the predetermined range so as reduce or substantially prevent the build up of torque oscillations in the mechanical drive train.