Power Supply Device Grid Outage Solar Utilization
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Solution Overview
Problem
Existing power supply systems fail to effectively utilize input alternating current (AC) voltage from solar modules during grid power outages, leading to instability and inefficiency in power distribution.
Innovation Solution
A power supply device with a controller, voltage conversion unit, and connectors that convert direct current (DC) voltage from a battery into AC voltage, allowing the AC voltage to be output to the grid or stored in the battery during grid outages, ensuring continuous power supply to external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power supply device outputs AC voltage to the grid during normal operation, then grid power supply is maintained, but during grid power outage the system fails to utilize solar-generated AC voltage leading to power loss
Solution Approach 1:
The power supply device dynamically switches between different operating modes (grid-connected mode, islanded mode, and charging mode) based on grid status. The controller detects grid power outage and automatically reconfigures the system to output AC voltage to external devices or convert it to DC for battery charging, ensuring continuous utilization of solar-generated power without energy waste
Solution Approach 2:
The power supply device is designed with multi-functionality to serve different purposes under different conditions: during normal grid operation it supplies power to the grid, during grid outage it can directly output AC voltage to external devices, and it can also convert AC voltage to DC for battery charging. This universal design eliminates energy loss by adapting to various operational scenarios
2Quantity of substance
If the system converts AC voltage to DC voltage for battery storage, then energy storage is improved, but the ability to provide immediate AC power to external devices is reduced
Solution Approach 1:
The power supply device segments the output paths into two independent channels: one for AC voltage output to external devices and another for DC voltage output to batteries. The controller can selectively activate either path or both simultaneously based on system needs, allowing immediate AC power delivery while also performing energy storage conversion without compromising either function
3Adaptability or versatility
If the controller manages multiple operating modes, then system adaptability is improved, but control complexity increases
Solution Approach 1:
The controller integrates multiple control functions into a single unified control unit that manages grid connection status detection, AC to DC conversion control, and output switching. By merging these functions into one controller, the system achieves high adaptability across different operating modes while minimizing control mechanism complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables stable operation of external devices during grid power outages by converting and storing AC voltage, thereby utilizing solar-generated power efficiently and maintaining grid stability.
Implementation Method 1
a voltage conversion unit to convert a first direct current (DC) voltage stored in a battery into an AC voltage
Implementation Method 2
a solar cell has come into the spotlight as a future generation battery, which directly converts sunlight into electrical energy using semiconductor devices
Data Source
AI summary
The present invention relates to a power supply device and a power supply system including the same. The power supply device includes a first connector to receive an input alternating current (AC) voltage, a second connector to output a first output AC voltage to a grid, a third connector connectable with a plug of an external electronic device, a voltage conversion unit to convert a first direct current (DC) voltage stored in a battery into an AC voltage, and a controller configured to control the first output AC voltage based on the input AC voltage not to be supplied to the grid when grid power outage occurs while the first AC voltage is output to the grid, and control the input AC voltage to be output to the third connector as a second output AC voltage, or control the input AC voltage to be converted into the first DC voltage and the first DC voltage to be supplied to the battery. Thereby, the input AC voltage generated by the solar module may be utilized when grid power outage occurs.