Energy Storage System Efficiency Control via Dynamic Power Distribution
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Solution Overview
Problem
Energy storage systems face challenges in maintaining optimal energy levels and long-term capacity due to unpredictable setpoint power demands, leading to potential overcharging or over-discharging, which affects both cost and lifespan of components.
Innovation Solution
A method for dynamically adapting the total efficiency of energy storage systems by distributing setpoint power among individual storage units based on their energy levels, efficiency, and characteristics, ensuring optimal operation within predetermined ranges and minimizing losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If setpoint power is produced over time to meet grid service requirements, then grid regulation capability is improved, but the energy level may drive beyond preset limit levels causing system reliability to deteriorate
Solution Approach 1:
The patent implements dynamic distribution factors that adapt in real-time based on current energy levels. The distribution factor for each storage unit is calculated as a function of its state of charge, automatically adjusting power allocation to prevent any unit from exceeding its energy limits while maintaining overall system responsiveness to grid regulation demands.
Solution Approach 2:
The system continuously monitors the energy level of each storage unit and uses this feedback to adjust the distribution of setpoint power. When a storage unit approaches its energy limits, the system automatically reduces its power contribution and redistributes the load to other units with available capacity, ensuring reliable operation within preset limits.
2Productivity
If storage units operate at extreme energy levels to meet immediate power demands, then short-term power production is improved, but component lifespan and storage capacity deteriorate
Solution Approach 1:
The patent changes the operational parameters of storage units by dynamically adjusting their state of charge ranges based on system needs. Instead of operating at fixed extreme levels, the system modulates the energy levels within optimal ranges, preventing degradation from extreme charging or discharging while maintaining adequate power production capability.
Solution Approach 2:
The system performs preliminary assessment of storage unit energy levels before allocating power demands. By predicting which units are approaching their energy limits, the system proactively redistributes power assignments to prevent extreme operating conditions that would shorten component lifespan, ensuring both immediate power needs and long-term durability are met.
3Ease of operation
If uniform power distribution is applied to all storage units, then system operation simplicity is improved, but individual unit optimization and total efficiency deteriorate
Solution Approach 1:
The patent applies local quality by assigning unique distribution factors to each storage unit based on its individual characteristics and current state. Instead of uniform power distribution, each unit receives a customized power allocation that considers its energy level, capacity, and operational status, optimizing total system efficiency while maintaining manageable complexity through automated calculations.
Data Source
AI summary
In a method for operating an electrical energy storage system, which is connected to an electrical energy supply grid for providing a setpoint power and contains a plurality of storage units, which are electrically connected at a point of common coupling PCC and among which the setpoint power is distributed, the total efficiency of the energy storage system is matched to the setpoint power by adjusting individual power components to be provided by the storage units.