Power Converter Control for Synchronized Multi-Storage Charging
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Solution Overview
Problem
Existing technologies face challenges in efficiently managing the storage and depletion of electrical energy across multiple energy storage devices, particularly in ensuring synchronized charging and discharging processes to maintain energy balance.
Innovation Solution
The implementation of a method that uses power converters with individually maintained voltage conversion ratios based on energy storage fractions, allowing for synchronized energy storage and depletion across multiple energy storage devices, including batteries, through common voltage or current references.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple energy storage devices are charged or discharged independently without synchronized control, then each device can operate at its own optimal rate, but energy imbalances occur where devices are charged or discharged at different times leading to system inefficiency
Solution Approach 1:
The control system continuously monitors the state of charge or discharge of each energy storage device and adjusts the voltage conversion ratio in real-time based on feedback signals. This closed-loop control ensures that all devices reach full charge or discharge states simultaneously, maintaining energy balance across the system.
Solution Approach 2:
The system dynamically changes the voltage conversion ratio parameter of the power converter based on the state of charge fractions of individual energy storage devices. By adjusting this parameter, the control system synchronizes the charging or discharging process across multiple devices without requiring complex coordination protocols.
2Manufacturing precision
If the voltage conversion ratio is maintained individually for each energy storage device based on its state of charge, then synchronized charging and discharging is achieved, but the control algorithm becomes more complex
Solution Approach 1:
The system uses the state of charge fraction as a key parameter to dynamically adjust the voltage conversion ratio. This parameter-based control approach achieves precise synchronization by directly linking the converter operation to the actual energy state of each device, simplifying the control logic compared to time-based or current-based methods.
Solution Approach 2:
Each energy storage device effectively controls its own charging or discharging rate through the state-of-charge-dependent voltage conversion ratio. The device's own energy state determines its operation, eliminating the need for complex centralized coordination and reducing overall system control complexity.
3Productivity
If energy storage devices are charged or discharged at different rates without coordination, then flexibility in individual device operation is maintained, but the overall system productivity decreases due to incomplete utilization of storage capacity
Solution Approach 1:
The system dynamically adjusts the voltage conversion ratio based on real-time state of charge conditions, allowing each energy storage device to operate at optimal rates while maintaining overall system synchronization. This dynamic control maximizes energy utilization by ensuring all devices are fully charged or discharged together, eliminating idle capacity.
Solution Approach 2:
The power converter is designed to handle multiple energy storage devices with different capacities and characteristics using a universal control strategy. The state-of-charge-dependent voltage conversion ratio approach works across diverse device types, maintaining operational flexibility while achieving synchronized operation and maximum system productivity.
Data Source
AI summary
A method to control storage into and depletion from multiple energy storage devices. The method enables an operative connection between the energy storage devices and respective power converters. The energy storage devices are connectible across respective first terminals of the power converters. At the second terminals of the power converter, a common reference is set which may be a current reference or a voltage reference. An energy storage fraction is determined respectively for the energy storage devices. A voltage conversion ratio is maintained individually based on the energy storage fraction. The energy storage devices are stored individually with multiple variable rates of energy storage through the first terminals. The energy storage is complete for the energy storage devices substantially at a common end time responsive to the common reference.