Power Control Device for Peak Demand Leveling
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Solution Overview
Problem
Existing power control systems face challenges in effectively leveling peak power demand, leading to increased basic power rates for consumers and instability in power supply for electric companies, as frequent discharging of storage batteries can deplete capacity and reduce opportunities for peak cutting, thereby increasing production costs and destabilizing power supply.
Innovation Solution
A power control system that includes a storage battery, memory for actual power consumption data, and a control device that acquires environmental and internal facility information to set an upper limit for grid power supply, using stored battery power when consumption exceeds this limit to maintain grid power within safe levels, thereby stabilizing supply and reducing peak demand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the storage battery is discharged frequently for peak cutting, then the peak power demand is reduced, but the storage capacity of the storage battery is depleted and the basic rate of power increases
Solution Approach 1:
The system performs preliminary charging of the storage battery during off-peak hours when power demand is low and electricity rates are lower. By pre-charging the battery before peak demand periods, the system prepares energy reserves in advance, enabling peak cutting without depleting storage capacity during critical periods. This resolves the contradiction by acting beforehand to accumulate resources needed for later peak management.
Solution Approach 2:
The control device dynamically adjusts the discharge threshold and charging/discharging operations based on real-time monitoring of storage battery capacity, power demand patterns, and electricity rate structures. The system adapts its peak cutting strategy by modifying discharge thresholds and operational parameters, allowing flexible management that prevents storage capacity depletion while maintaining effective peak demand reduction.
2Power
If the threshold for discharging is set high, then the basic rate of power is reduced, but the opportunity to start discharging for peak cutting is reduced and power supply becomes unstable
Solution Approach 1:
The control device continuously monitors power consumption, storage battery charge level, and discharge threshold conditions, using this feedback to dynamically adjust operations. When power consumption exceeds the threshold, the system initiates discharge; when the battery approaches full charge or the threshold is no longer exceeded, it pauses or stops discharge. This feedback mechanism ensures stable power supply while achieving peak cutting, resolving the contradiction between threshold setting and power supply reliability.
Solution Approach 2:
The system changes operational parameters such as discharge threshold values, charging rates, and discharging rates based on varying conditions including time of day, power demand patterns, and storage battery state. By adaptively adjusting these parameters, the system maintains optimal balance between reducing basic power rates and ensuring power supply stability, preventing both premature discharge and insufficient peak cutting.
3Use of energy by moving object
If the storage device is kept close to fully charged state, then the charging operation is optimized, but the ability to discharge for peak cutting is reduced
Solution Approach 1:
The system implements periodic charging and discharging cycles rather than maintaining a static charge state. The control device alternates between charging phases (when power rates are low and demand is low) and discharging phases (when power demand exceeds threshold), creating a rhythmic pattern of energy storage and release. This periodic action ensures the battery is charged sufficiently for peak cutting while optimizing charging operations during appropriate time windows.
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 solution enables more effective leveling of peak power demand, reducing basic power rates for consumers and stabilizing power supply for electric companies by optimizing storage battery usage and predicting power consumption based on environmental and internal facility data.
Implementation Method 1
a storage battery that is provided in the facility, and that is charged upon reception of power supply and discharges charged power to supply power to the facility
Data Source
Figure 1
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AI summary
In a power control system (1), a control device (100) acquires at least one of information about an external environment (result or predicted temperature) of a facility (800) and information on a parameter associated with power consumption (production plan) in an internal environment of the facility (800) and calculates a correlation between these pieces of information and actual consumed power. The control device (100) predicts consumed power of the facility (800) on the basis the correlation that is calculated and information such as predicted temperature and determines an upper limit set value of power supplied from an electrical grid to the facility (800) on the basis of a result of the prediction. The control device (100) supplies power charged in a storage battery (500) to the facility (800) when the consumed power of the facility (800) exceeds the upper limit set value. Thereby, power is able to be used in a facility while a peak of power demand is further leveled and the peak of power demand is controlled so as not to exceed maximum power that is able to be supplied by an electric power supplier.