BESS Standby Energy Offset for Parasitic Loss Compensation
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Solution Overview
Problem
Battery energy storage systems (BESS) in renewable energy facilities face challenges in maintaining equipment power during standby modes due to parasitic losses, leading to insufficient energy for operational needs, especially when not charging or discharging, and reliance on the energy grid may be restricted.
Innovation Solution
An energy offset system is implemented, utilizing a processor to control a second BESS or renewable energy source to provide power to devices within the facility, reading energy meter readings to account for losses and ensure continuous operation by redirecting energy from the grid or other renewable sources when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the BESS operates in standby mode to remain ready for operation, then the BESS can quickly respond when needed, but the BESS consumes energy due to parasitic losses from transformers and idle equipment
Solution Approach 1:
The patent converts the harmful parasitic losses into a measurable quantity that triggers a compensatory action. The processor monitors energy losses during standby mode and automatically draws additional energy from the grid or renewable sources to offset these losses, transforming the waste into a controlled energy management strategy that maintains system readiness without depleting stored energy
Solution Approach 2:
The system implements continuous feedback by monitoring the energy consumption of the BESS during standby mode through meter readings. The processor uses this feedback information to dynamically adjust energy procurement from the grid or renewable sources, creating a closed-loop control system that balances standby readiness with energy conservation
2Reliability
If the BESS is sized to provide enough energy to overcome parasitic losses during standby, then equipment can be continuously powered, but the BESS requires larger capacity and more storage space
Solution Approach 1:
The patent makes the energy supply system multi-functional by integrating three sources: the BESS for immediate response, the grid for baseline support, and renewable energy sources for offsetting losses. This universal approach allows the system to meet continuous power requirements without oversizing the BESS, as each component serves multiple purposes across different operating conditions
Solution Approach 2:
The system performs preliminary action by proactively procuring energy from the grid or renewable sources during standby periods to offset expected parasitic losses before they deplete the BESS. This advance energy procurement prevents the need for excessive BESS capacity while ensuring continuous equipment operation
3Productivity
If the BESS provides energy to the grid to enable other loads to operate, then the grid can serve other loads, but the BESS may not have enough stored energy to power equipment within the facility
Solution Approach 1:
The processor continuously monitors the state of charge of the BESS and the energy flow to and from the grid. When the BESS discharges energy to the grid, the system receives feedback on the remaining capacity and automatically adjusts by procuring replacement energy from the grid or renewable sources to maintain the minimum threshold needed for equipment operation
Solution Approach 2:
The patent introduces the grid and renewable energy sources as intermediary buffers between the BESS and the equipment power requirements. These intermediaries allow the BESS to discharge to the grid while the intermediaries simultaneously replenish the BESS capacity, decoupling the BESS discharge action from the equipment power availability concern
4Loss of energy
If additional components are added to the original BESS to create an energy offset system, then losses during idle state can be compensated, but the system complexity increases
Solution Approach 1:
The patent segments the energy management function into distinct modular components: the original BESS, the energy offset system with its own controller, and the monitoring processor. This segmentation allows the offset system to be added independently without redesigning the entire BESS, reducing the perceived complexity while achieving loss compensation
Data Source
AI summary
The present disclosure provides systems and methods for offsetting parasitic energy losses of a battery energy storage system (BESS). A method may include determining, by one or more processors of a renewable energy power plant coupled to an energy grid, a condition is satisfied; and responsive to the determination, adjusting, by the one or more processors, a state of a switch from a first state configured to couple a second BESS with a renewable energy source (RES) to a second state configured to couple the second BESS with the BESS. The RES configured to charge the T-BESS when the switch is in the first state and the T-BESS configured to send energy to the devices to satisfy energy requirements of the devices when the switch is in the second state.