Peak Cut System Control Logic for Power Cost Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing peak cut systems require continuous operation of power-generating devices, leading to high running costs due to increasing fuel costs, as both power-generating devices and power storage devices are always driven for peak cut processes.
Innovation Solution
A peak cut system that utilizes a control unit to prioritize power discharge from a power storage device for initial peak cut processes, only engaging the power-generating device when the storage device's capacity is insufficient to meet peak demand, thereby minimizing power generation by the power-generating device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both power-generating device and power storage device are always driven for peak cut, then peak cut effectiveness is improved, but running cost increases
Solution Approach 1:
The system dynamically switches between first peak cut process (using only power storage device) and second peak cut process (using both power storage device and power-generating device) based on real-time power demand conditions, allowing the configuration to adapt to varying load requirements and minimize fuel consumption while maintaining peak cut effectiveness
Solution Approach 2:
The peak cut process is segmented into two distinct modes: the first peak cut process that relies solely on power storage device discharge, and the second peak cut process that combines power storage device discharge with power-generating device operation, enabling selective application of each mode based on whether the power storage device alone can meet the peak demand
2Reliability
If power-generating device is continuously operated, then power supply reliability is improved, but fuel consumption increases
Solution Approach 1:
The power-generating device operates periodically rather than continuously, being activated only during second peak cut processes when the control unit determines that combined operation is necessary, thereby reducing overall fuel consumption while maintaining power supply reliability when needed
3Use of energy by moving object
If power storage device is used for initial peak cut, then power-generating device operation is reduced, but power storage device discharge capacity is required
Solution Approach 1:
The power storage device is designed with sufficient capacity to handle at least the first level of peak cut demand alone, providing a buffer that allows the system to defer power-generating device operation and reduce fuel consumption, while the control unit activates the power-generating device only when the power storage device's discharge capacity is insufficient
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
This approach reduces the running cost of the power-generating device by minimizing its power generation during peak cut processes, especially when fuel costs are high, by relying on the power storage device for initial peak cuts and using the power-generating device only when necessary.
Implementation Method 1
a power storage device which carries out charge and discharge with respect to the load
Implementation Method 2
a power-generating device which generates power and supplies the generated power to the load
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
An object of the present invention is to provide a peak cut system which can reduce the running cost of a power-generating device even when a peak cut process is carried out. In a peak cut system (100) according to the present invention, a control unit (3) executes such a control procedure that a peak cut process is first carried out only by the discharge from a power storage device (2) and the power generation by a power-generating device (5) is carried out only when a predetermined amount of peak cut cannot be achieved only by the discharge from the power storage device (2).