Generator Control System Occupancy-Based Runtime Optimization
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Solution Overview
Problem
Existing automatic transfer switch (ATS) systems for backup generators lack the ability to differentiate load control based on occupancy levels, leading to unnecessary generator runtime and energy inefficiency when facilities are unoccupied.
Innovation Solution
A system and method that determine the occupancy status of a facility using sensors and load patterns to adjust the generator operation mode, reducing runtime and energy consumption by implementing different operational modes for occupied, inactive, and unoccupied states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the generator runs continuously to ensure uninterrupted power to all loads, then reliability of power supply is improved, but energy consumption increases and generator wear increases
Solution Approach 1:
The system applies different operational characteristics to different loads based on their criticality. Critical loads receive continuous power during outages, while non-critical loads receive intermittent power. This local differentiation allows the generator to maintain reliability for essential functions while reducing overall energy consumption and wear.
Solution Approach 2:
The generator control system dynamically adjusts its operation based on detected occupancy levels. When occupancy is detected, the generator runs continuously to provide full power. When no occupancy is detected, the system transitions to a reduced-runtime mode where the generator operates intermittently, creating a dynamic adaptation to changing conditions.
2Reliability
If the generator runs continuously during outages, then power availability to loads is improved, but generator runtime and wear increase
Solution Approach 1:
Different loads are assigned different power delivery characteristics based on their criticality. Critical loads maintain continuous power supply, while non-critical loads experience intermittent power delivery during outages when occupancy is not detected. This selective approach reduces overall generator runtime while maintaining power availability for essential functions.
Solution Approach 2:
When no occupancy is detected, the system implements periodic power delivery to non-critical loads rather than continuous power. The generator operates in cycles, providing power for predetermined time periods then shutting down, which reduces total runtime while still maintaining periodic power availability for essential functions.
3Ease of operation
If the ATS uses fixed time delays for generator start and cool-down, then operational simplicity is maintained, but adaptability to different occupancy scenarios is reduced
Solution Approach 1:
The ATS control system transitions from static, fixed time delays to dynamic, condition-based timing. The system detects occupancy levels and dynamically adjusts generator start delays, runtime durations, and cool-down periods accordingly. This dynamic adaptation maintains ease of operation through automatic detection while providing versatility across different occupancy scenarios.
Solution Approach 2:
The system changes operational parameters (time delays, runtime durations, power delivery intervals) based on detected occupancy conditions. When occupancy is detected, one set of parameters is applied; when no occupancy is detected, different parameters are applied. This parameter adaptation enables the system to handle diverse scenarios while maintaining simple automatic operation.
Data Source
AI summary
A system for providing backup power to a facility includes a generator, and a controller configured to determine whether electrical power to the facility has been interrupted, determine a mode of operation based on a type of occupancy currently within the facility, and if electrical power has been interrupted, then operate the generator based on the determined mode.