Energy Management System Preventing Arbitrage via Load-Generation Comparison
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Solution Overview
Problem
Current home energy management systems lack the functionality to prevent storing energy at low-cost times and selling it at high-cost times, leading to unfair energy trading, as they cannot effectively compare energy supply and consumption to control energy storage and output.
Innovation Solution
An energy management system that includes a data receiving unit, total load and energy calculation units, a comparator, and a switch signal transmitting unit to autonomously determine whether to supply or store energy based on the comparison between total energy generation and consumption, preventing unfair trading by controlling energy flow into or out of a battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a battery energy storage system is connected to the energy management system, then energy can be stored and sold at high-cost times, but the system cannot prevent legally prohibited arbitrage trading
Solution Approach 1:
The patent implements a feedback mechanism where the main register receives consumption information from sub-registers connected to the battery system. The control unit continuously monitors the relationship between energy supply and consumption, and provides feedback control signals to the switch. This closed-loop feedback system ensures that the battery only stores energy when supply exceeds consumption, preventing prohibited arbitrage trading while maintaining legal compliance.
Solution Approach 2:
The patent merges the main register with multiple sub-registers into a unified energy management system. The main register integrates consumption information from the load and the battery system, while the control unit coordinates all components (switch, battery, photovoltaic system) as a single integrated system. This merging ensures centralized control and prevents unauthorized energy arbitrage.
2Reliability
If the main register is not connected to the battery, then unfair energy trading is prevented, but the system cannot accurately measure the battery's energy usage
Solution Approach 1:
The patent segments the energy measurement system into a main register and multiple sub-registers. The main register is connected to the power supply company, while sub-registers are connected to specific loads and the battery system. This segmentation allows the main register to remain unconnected to the battery (preventing unfair trading) while sub-registers independently measure battery energy consumption, thus eliminating information loss.
Solution Approach 2:
The patent introduces sub-registers as intermediary devices between the main register and the battery system. These sub-registers act as mediators that collect consumption information from the battery and transmit it to the main register without creating a direct connection. This intermediary mechanism enables accurate measurement of battery energy usage while maintaining the integrity of the main register-battery separation.
3Reliability
If a switch is added to control battery connection, then energy flow can be controlled to prevent arbitrage, but the device complexity increases
Solution Approach 1:
The patent designs the switch to perform multiple functions: it controls the connection between the battery and both the load and the main register simultaneously. The control unit integrates the switching control logic, making it a universal control component that manages energy flow in multiple directions. This multi-functionality reduces the need for separate control components, thereby limiting the increase in device complexity.
Data Source
AI summary
An energy management system controlling energy flowing into or out of a battery is provided. The energy management system includes a data receiving unit receiving load data and energy data; a total load amount calculating unit calculating the total amount of power consumption by using the received load data; an energy generation amount calculating unit calculating the total amount of power generation by using the received energy data; a comparator comparing the calculated total amount of the power consumption with the calculated total amount of the power generation; and a switch connecting the battery to a power supply according to a comparison result.