Battery Control System Delay-Based Frequency Adjustment
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Solution Overview
Problem
The existing battery control systems face challenges in accurately controlling the discharging or charging of batteries installed at customer locations, making it difficult for electric power system administrators to manage the balance of electric power supply and demand effectively, especially during emergencies when the frequency of the electric power system shifts.
Innovation Solution
A battery control system that includes detecting means to measure communication and operation delays, measuring means to assess the frequency rate-of-change of the electric power system, selecting means to identify suitable batteries for adjustment based on delay periods and frequency changes, and command means to supply execution commands to these batteries for charging or discharging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If each ES autonomously discharges itself based on frequency monitoring, then the battery responds quickly in case of emergency, but the administrator finds it difficult to grasp whether the ES can achieve appropriate discharged level and control the balance of electric power supply and demand appropriately
Solution Approach 1:
The patent introduces a central control device as an intermediary between the ES units and the administrator. This control device collects delay period information from each ES, determines appropriate discharged levels based on this information, and communicates control instructions back to the ES units. This intermediary structure enables both quick autonomous response and centralized control visibility, resolving the contradiction between fast response and information availability for administrators.
Solution Approach 2:
The patent implements a feedback mechanism where each ES reports its delay period (the time from receiving a discharged level instruction to actually discharging) to the central control device. The control device uses this feedback information to determine appropriate discharged levels and adjust control strategies accordingly. This feedback loop enables the administrator to grasp the actual state and response capability of each ES while maintaining quick response through autonomous operation.
2Quantity of substance
If a number of ESs are used to manage the balance of electric power supply and demand, then the capacities of batteries are increased, but it becomes difficult to accurately control the discharging or charging of individual batteries
Solution Approach 1:
The patent divides the control of the battery system into individual ES units, each with its own delay period characteristics. Instead of treating all ES units uniformly, the system segments the control approach by measuring and utilizing the specific delay period of each unit. This segmentation enables precise control of individual batteries while aggregating their capacities to manage overall electric power supply and demand balance.
Solution Approach 2:
The patent applies local quality by recognizing that each ES unit has unique characteristics (different delay periods) and tailors the control approach to these local differences. The central control device determines appropriate discharged levels for each ES based on its specific delay period, rather than applying a uniform control strategy. This localized control approach maintains measurement precision for each individual battery while utilizing the collective capacity of multiple ES units.
3Reliability
If the administrator cannot accurately control individual batteries, then the balance of electric power supply and demand cannot be managed effectively, but implementing complex control systems increases device complexity
Solution Approach 1:
The patent enables each ES unit to autonomously measure its own delay period and report this information to the central control device. The ES units perform self-testing and self-reporting functions, which simplifies the overall control system architecture. The central control device only needs to collect this self-reported information and determine appropriate discharged levels, rather than implementing complex monitoring and control mechanisms for each individual unit. This self-service approach improves reliability of power balance management while avoiding excessive device complexity.
Data Source
AI summary
A battery control system, which controls operation of a plurality of batteries connected to an electric power system, the battery control system comprises: detecting means that detects a delay period of each battery of said plurality of batteries which represents a period that has elapsed after the battery control system supplies said each battery with an execution command for charging or discharging said each battery until said each battery operates according to the execution command; measuring means that measures a frequency rate-of-change of electric power of the electric power system; selecting means that selects adjustment batteries for adjusting the electric power of the electric power system from said plurality of batteries based on the frequency rate-of-change and the delay period of said each battery of said plurality of batteries; and command means for supplying the execution command to the adjustment batteries.