Genset Predictive Load Management Controller
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Solution Overview
Problem
Existing generator set control systems face challenges in minimizing engine lugging or overspeeding and subsequent electrical power fluctuations due to unpredictable load changes, as current feedforward control methods may not provide adequate forewarning for the engine to fully respond to impending mechanical load changes.
Innovation Solution
A control system that includes an input device for desired load adjustments and a power control device, with a controller that determines and implements changes in the generator set's power output before the load adjustment is initiated, allowing the engine to adjust mechanically before the load change occurs, thereby minimizing speed changes and electrical power fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If feedforward control is used to provide forewarning of load changes, then engine response time is improved, but the forewarning may still be inadequate for the engine to fully respond to impending load changes
Solution Approach 1:
The system performs preliminary action by detecting impending load changes and adjusting engine power before the mechanical load change occurs. The controller receives input indicative of a desired adjustment to external load, determines the corresponding change in power output, and implements this change before the load adjustment is initiated, allowing the engine to be pre-positioned to accommodate the upcoming load change
Solution Approach 2:
The system makes the control approach dynamic by continuously monitoring load conditions and adjusting the timing and magnitude of power changes based on real-time conditions. The controller adapts the predictive control strategy based on the specific load change characteristics, engine operating state, and required response
2Stability of the object's composition
If engine power is adjusted in response to load changes, then electrical power characteristic fluctuations are reduced, but the adjustment may occur after the load change has already been applied
Solution Approach 1:
The system performs preliminary action by detecting impending load changes and adjusting engine power before the mechanical load change occurs. The controller receives input indicative of a desired adjustment to external load, determines the corresponding change in power output, and implements this change before the load adjustment is initiated, allowing the engine to be pre-positioned to accommodate the upcoming load change
Solution Approach 2:
The system applies preliminary anti-action by counteracting the anticipated effects of load changes before they occur. By predicting the direction and magnitude of upcoming load changes, the controller pre-adjusts engine power in the opposite direction of the expected disturbance, effectively canceling out the destabilizing effects before they can manifest in electrical power fluctuations
3Reliability
If the controller implements power changes before load adjustment, then engine lugging and overspeeding are minimized, but system complexity increases
Solution Approach 1:
The system uses feedback by continuously monitoring engine operating parameters (speed, power output) and comparing them against desired values. The controller receives feedback from sensors monitoring engine state and load conditions, and uses this feedback to continuously adjust the predictive control strategy, ensuring optimal performance while maintaining simplicity through proven control theory
Data Source
AI summary
A control system is provided for a generator set coupled to supply electrical power to an external load. The control system may have an input device configured to receive input indicative of a desired adjustment to the external load, and a power control device operable to affect a power output of the generator set. The control system may also have a controller in communication with the input device and the power control device. The controller may be configured to determine a change in the power output of the generator set corresponding to the desired adjustment to the external load, and to operate the power control device to implement the change in power output of the generator set before the desired adjustment to the external load is initiated.