Energy Storage Temperature Control Under Grid Supply Constraints
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Solution Overview
Problem
Existing control systems for energy storage devices in vehicles face challenges in managing power supply to temperature control devices, leading to reduced energy storage capacity and increased power shortages in the grid when providing ancillary services, as the power stored in energy storage devices is consumed by the temperature control devices.
Innovation Solution
A control system with multiple control devices that manage the charging and discharging of energy storage devices, allowing for scheduled power adjustments and temperature control using either external or stored power, with the ability to prohibit power supply from the grid based on supply and demand information to prevent power shortages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the temperature control device is driven using stored power from the energy storage device, then the energy storage device can maintain sufficient power for scheduled operations, but the power supply to the power network may be insufficient when the grid is undersupplied
Solution Approach 1:
The system performs preliminary temperature control of the energy storage device before scheduled charge/discharge operations by driving the temperature control device using external power when available. This ensures the energy storage device reaches optimal temperature for subsequent operations without consuming stored power during critical discharge periods, thus maintaining both sufficient stored power and power supply capability to the grid when needed.
2Quantity of substance
If the temperature control device is driven using external power from the power network, then the stored power in the energy storage device is preserved, but the power supply shortage in the power network may be increased
Solution Approach 1:
The control system continuously monitors the supply and demand status of the power network and adjusts the operation of the temperature control device accordingly. When the power network is in an oversupplied state, the system permits external power supply to drive the temperature control device. When the network is undersupplied, the system prohibits or limits external power supply, thereby preventing exacerbation of power shortages while still preserving stored power in the energy storage device for critical operations.
3Reliability
If the power supply from the power network is permitted before the predetermined start time, then the temperature control can be performed effectively, but the power supply shortage in the power network may be worsened
Solution Approach 1:
The system dynamically adjusts the permission status for external power supply based on real-time power network conditions. The third control device switches between permitting and prohibiting external power supply to the power adjustment resource according to the supply and demand status. This dynamic control ensures that temperature control reliability is maintained when the grid can support it, while preventing power supply shortages during critical periods when demand exceeds supply.
Data Source
AI summary
A control system is configured to control a power adjustment resource including an energy storage device configured to electrically connect to a power network, and a temperature control device configured to perform temperature control of the energy storage device. The control system includes: a first control device configured to control charging and discharging of the energy storage device; a second control device configured to control the temperature control device; and a third control device. The second control device is configured to select either external power or stored power and drives the temperature control device using the selected power. The third control device is configured to determine whether to permit power supply from the power network to the power adjustment resource based on supply and demand information of the power network, and switch between permission and prohibition of the power supply.