Storage Battery Control for Peak Demand Reduction
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Solution Overview
Problem
Existing electric power supply systems using storage batteries are not efficient in reducing peak electric power demand and charging/discharging due to reliance on outdated methods that do not account for real-time energy fluctuations and ambient temperature variations.
Innovation Solution
A control method and device that monitor energy supply per unit time and predetermined time periods, calculating changes and peak values to instruct storage batteries to discharge when specific conditions are met, such as a difference or differential value becoming zero or negative, or within a predetermined range, to optimize charge and discharge cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electric power supply systems use storage batteries to store electric power during low-cost periods and discharge during high-demand periods, then economical efficiency is improved, but the ability to precisely reduce peak electric power demand is worsened due to reliance on outdated estimation methods
Solution Approach 1:
The control device performs preliminary actions by storing not only electric energy data but also time information and differential values of electric energy changes. This preliminary data collection and processing enables the system to make informed discharge decisions that precisely target peak demand periods, resolving the contradiction between economical efficiency and peak reduction precision.
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring electric energy supplied from the system, calculating differential values over time, and comparing current states with stored historical data. This feedback loop allows the control device to dynamically adjust discharge timing to achieve precise peak demand reduction while maintaining economical efficiency.
2Device complexity
If the system monitors electric energy at longer time intervals, then device complexity is reduced, but the ability to detect real-time energy fluctuations and respond to peak demand is worsened
Solution Approach 1:
The monitoring period is segmented into multiple discrete time points, with the control device calculating differential values between consecutive time points. This segmentation approach enables real-time detection of energy fluctuations without requiring continuous monitoring, thus maintaining low device complexity while improving response speed to peak demand conditions.
Solution Approach 2:
The system dynamically adjusts its monitoring and response strategy by calculating differential values of electric energy changes over time. This dynamic approach allows the system to detect rapid changes in energy demand patterns and respond appropriately, improving response speed without proportionally increasing device complexity.
3Ease of operation
If the storage battery discharges based on simple time-based scheduling, then ease of operation is improved, but the efficiency of charge and discharge cycles is worsened due to inability to adapt to real-time conditions
Solution Approach 1:
The control device operates autonomously by automatically analyzing stored electric energy data, calculating differential values, and determining optimal discharge timing without requiring manual intervention. This self-service capability maintains ease of operation while significantly improving charge and discharge efficiency through adaptive response to real-time energy patterns.
Solution Approach 2:
The system changes operational parameters dynamically by adjusting discharge timing based on calculated differential values of electric energy. This parameter adaptation enables the system to optimize charge and discharge cycles according to real-time conditions, improving efficiency while maintaining ease of operation through automated control.
Data Source
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AI summary
The control method, for a storage battery 100 provided in a consumer site receiving electric power supply from a system 104, includes: a first monitoring step of monitoring a first electric energy supplied from the system 104 per unit time period, where the unit time period is shorter than a predetermined time limit; a second monitoring step of monitoring a second electric energy supplied from the system 104 per predetermined time limit; a calculation step of obtaining a change over time in the first electric energy; and an instruction step of instructing the storage battery to discharge electric power to supply a load 108 located in the consumer site in accordance with the change over time in the first electric energy and with a peak value in the past pertaining to the second electric energy.