Generator Set Load Sharing Control via Transient Thresholds
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Solution Overview
Problem
Generator sets in power supply systems often respond inadequately to load transient spikes, either adding power too early or too late, and may be prematurely or unnecessarily retained in operation.
Innovation Solution
A control system that uses configurable load transient set points to determine when to add or remove generator sets based on detected load transients, with different thresholds for addition and removal, ensuring timely and efficient load sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If generator sets are added to supply electric power in response to load transient spikes, then power supply capability is improved, but response timing accuracy deteriorates (premature or delayed addition)
Solution Approach 1:
The control system performs preliminary assessment of load transient conditions by monitoring multiple parameters (load change rate, absolute load change, transient duration) before commanding generator sets to start. This preliminary action ensures that generators are added only when truly necessary and at the optimal time, avoiding both premature and delayed responses to load changes.
Solution Approach 2:
The system dynamically adjusts generator addition decisions based on real-time load conditions. By continuously monitoring load transients and applying multiple criteria (rate of change, absolute change, duration), the system adapts its response timing to match actual power demand patterns, improving both power supply capability and response accuracy.
2Reliability
If generator sets are retained to supply electric power, then power supply reliability is improved, but operational efficiency deteriorates (premature or extended operation)
Solution Approach 1:
The control system continuously monitors load conditions and provides feedback to determine when generator sets should be dropped. By applying multiple criteria including load change rate, absolute load change, and transient duration, the system accurately identifies when load demands have stabilized, enabling timely generator dropout and improving operational efficiency while maintaining reliability.
Solution Approach 2:
Before dropping generator sets, the system performs preliminary assessment of current load conditions to ensure that power demand has stabilized. This preliminary check prevents premature dropout that would compromise reliability while avoiding extended operation that would reduce efficiency.
Data Source
AI summary
A control system, apparatus, and method to control load sharing of multiple generator sets of a power supply system are described. Load transient set points to add an individual generator set can include a transient percentage threshold to characterize load transients as a load transient, a transient count threshold, and a transient count time period during which a detected number of load transients is compared with the transient count threshold. A controller can determine whether to add the individual generator set based on whether the detected number of load transients is equal to the transient count threshold within the transient count time period and control addition of the individual generator set responsive to the detected number of load transients equaling the transient count threshold.