Apparatus and method for charge and discharge scheduling using Depth of Discharge control in energy storage device

Energy storage lifetime cost optimization charge/discharge scheduling

This technology relates to a charging and discharging scheduling device and method by controlling the discharge depth of an energy storage device. It relates to a charging and discharging scheduling device and method of an energy storage device according to an optimized discharge depth value derived by considering the operating cost of the power grid and the usage cost of the energy storage device in the operation of the energy storage device.

Energy storage devices are important as a core component in the next-generation power supply chain such as distributed power sources and smart grid environments, but can be charged and discharged multiple times. Discharging is possible, but because its lifespan is limited, efficient scheduling is required according to the usage environment and purpose.

This technology can minimize the total power supply cost through charging and discharging of the energy storage device that reflects the operating cost of the power grid and the usage cost of the energy storage device itself to supply power, and can promote efficient repeated use relative to the lifespan of the energy storage device by using the optimized discharge depth value.

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Key Features:

• Calculate the power grid operation cost at a specific depth of discharge (DoD) based on demand response (DR) signals and real-time power rate information
• Calculate the depreciation cost due to ESS use based on the replacement cost of the ESS and the lifespan that varies depending on the depth of discharge
• Create a specific ESS charging and discharging path (schedule) that minimizes the total cost based on the analyzed optimal point
• In connection with solar and wind power plants with high output volatility Contributes to grid stability by efficiently storing and supplying generated power'

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This technology was developed through a high-speed demand response-based energy IT convergence platform research and development project to overcome the power crisis through support from the National IT Industry Promotion Agency.

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