Moving-Object Power Supply Control Using Predicted SOC
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Solution Overview
Problem
Existing power supply systems in moving objects, such as aircraft, face challenges in managing power demand fluctuations, leading to potential power shortages due to the slow response of gas turbine engines and delays in power generation, which can deplete the capacity of onboard power storage devices.
Innovation Solution
A power supply system that includes a prediction unit to forecast the state of charge (SOC) of a power storage device, a correction power amount determination unit to adjust generated power, and a control unit to manage the power generation device based on predicted SOC, ensuring timely power supply and reducing the reliance on storage device output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the gas turbine engine is used as a power generation device, then the moving object can operate with high energy efficiency, but the engine responds slowly to power demand fluctuations, causing delays in power supply
Solution Approach 1:
The control unit predicts future power requirements and SOC values in advance, and adjusts the engine output beforehand to prevent power shortages. This preliminary action allows the slow-responding gas turbine engine to meet power demands by proactively increasing generation capacity before the actual need arises.
Solution Approach 2:
The system dynamically adjusts the engine output based on predicted power requirements and current SOC levels. The control unit continuously modifies the target output value according to changing conditions, enabling the power generation system to adapt its response characteristics to match varying power demands while maintaining optimal efficiency.
2Reliability
If the power storage device is used to compensate for power shortages, then power supply reliability is improved, but the capacity of the storage device is depleted faster
Solution Approach 1:
The control unit continuously monitors the SOC of the power storage device and uses this feedback to adjust engine output. When SOC decreases below the target value, the system increases engine generation to recharge the storage device, creating a closed-loop control that maintains reliable power supply while preserving storage capacity.
Solution Approach 2:
By predicting future SOC values and power requirements, the system takes preliminary action to adjust engine output before the storage device capacity is critically depleted. This prevents excessive discharge of the power storage device while maintaining power supply reliability.
3Reliability
If the engine output is increased to meet power demand, then power supply reliability is improved, but fuel consumption increases
Solution Approach 1:
The control unit predicts future power requirements and adjusts engine output in advance, allowing the engine to operate at optimal efficiency points rather than responding reactively to power demands. This reduces unnecessary fuel consumption while maintaining power supply reliability.
Solution Approach 2:
The system dynamically optimizes engine output based on predicted conditions, adjusting generation capacity to match actual needs while maintaining reliable power supply. This dynamic adjustment prevents excessive fuel consumption by avoiding continuous high-output operation when full capacity is not required.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively manages power fluctuations by predicting and adjusting power generation, reducing the need for storage device output and maintaining optimal SOC levels, thereby ensuring reliable power supply and extending the lifespan of the storage device.
Implementation Method 1
a power generation device including an engine and a generator driven by the engine
Data Source
AI summary
A power supply system includes: a prediction unit that, based on required power, generated power, and a current SOC of a power storage device, predicts a predicted SOC that is an SOC of the power storage device obtained after a predetermined time; a correction power amount determination unit that determines a correction power amount used for reducing a deviation between the predicted SOC and a target SOC to be achieved; a target generated power correction unit that determines corrected target generated power by correcting target generated power with the correction power amount, the target generated power being the generated power determined in accordance with the required power; and a control unit that can control a power generation device based on the corrected target generated power.