Charge-Discharge Group Control Using Integrated Energy Difference
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Solution Overview
Problem
In existing electric power control systems, new charge and discharge elements added to a group cannot determine a target value based on previous times, leading to prioritization of existing elements and potential underconsumption of electric power by new elements, especially when remaining power is low.
Innovation Solution
A charge and discharge control method that integrates electric energy consumption of a group over a control cycle, determines a command value based on an energy difference, and broadcasts it to charge and discharge elements to autonomously control their power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing electric power control systems use target values from previous control cycles, then existing elements can maintain stable power consumption, but new elements cannot determine target values and are deprived of power according to their priority
Solution Approach 1:
The system performs preliminary integration of electric energy consumption from the start time to the current control time, establishing a cumulative energy baseline before new elements are added. This preliminary action ensures that when new elements join the group, they can access the accumulated energy information and determine their target values based on the integrated energy difference, rather than being excluded by the lack of previous target values.
Solution Approach 2:
The patent introduces an intermediary mechanism - the integrated electric energy consumption and the calculated command value - that mediates between the existing control system and new elements. Instead of directly using previous target values (which new elements cannot access), the system uses the integrated energy consumption as an intermediary to derive a command value that reflects both historical consumption patterns and current group status, enabling fair power allocation to new elements.
2Productivity
If the system prioritizes existing elements' power consumption, then existing elements maintain their power usage, but new elements cannot consume power corresponding to their priority when remaining power is small
Solution Approach 1:
The system implements a feedback mechanism where the integrated electric energy consumption continuously reflects the actual power usage of the group. The command value is derived from the electric energy difference (target electric energy minus consumed electric energy), creating a feedback loop that dynamically adjusts power allocation. This feedback ensures that when new elements are added, the system recalculates the command value based on current group composition and remaining power, allowing new elements to receive appropriate power allocation according to their priority rather than being starved by existing elements' consumption patterns.
3Speed
If the control system uses instantaneous power values, then quick response is achieved, but accurate energy allocation over control cycles cannot be ensured
Solution Approach 1:
The patent merges instantaneous power measurements with time integration to create a comprehensive energy consumption metric. By integrating electric power consumption over the control cycle (from start time to current control time), the system combines the speed of instantaneous measurement with the precision of cumulative energy accounting. This merging allows the system to maintain quick response capabilities while ensuring accurate energy allocation, as the integrated energy value provides a precise basis for calculating command values that reflect actual power usage patterns.
Data Source
AI summary
A charge and discharge control method for a charge and discharge element is performed every control cycle from a start time. Electric energy consumption is measured by integrating electric power consumption of a group including one or more charge and discharge elements, as a whole, from the start time to a control time at which one or more control cycles have elapsed. Target electric energy is acquired by integrating target electric power predetermined for the group as a whole from the start time to the control time. A command value is determined based on an average electric energy, which is obtained by dividing an energy difference electric obtained by subtracting the electric energy consumption from the target electric energy. The one or more charge and discharge elements autonomously control their own charge and discharge electric power based on the command value.