Hybrid Solar Power System Bypasses Conversion Stages
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Solution Overview
Problem
Existing solar power generation systems experience significant power transformation losses when charging batteries or supplying power to loads, due to the need for power to pass through multiple conversion stages, leading to inefficient energy usage.
Innovation Solution
A hybrid solar power generation system that includes a solar panel, switches, a rectifying control unit, a rechargeable battery, a DC to AC inverter, a DC to DC charging unit, and a system control unit, which allows direct charging of the battery and bypasses unnecessary conversion stages when supplying power to loads, reducing power transformation losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If power passes through multiple conversion stages (boost converter and bi-directional charger) to charge the battery, then the battery can be charged, but power transformation loss increases
Solution Approach 1:
The patent extracts and removes the bi-directional charger from the power path by implementing separate dedicated charging and discharging circuits. The charging circuit directly connects the solar panel to the battery, eliminating unnecessary conversion stages and reducing power transformation loss during charging operations.
Solution Approach 2:
The patent segments the power management functions into separate dedicated circuits: a charging circuit for battery charging, a discharging circuit for battery discharge, and an inverter circuit for AC output. This segmentation allows each circuit to be optimized for its specific function, reducing overall system complexity and power losses.
2Loss of energy
If the battery supplies power through the bi-directional charger to the control unit, then the control unit receives power, but battery power consumption increases
Solution Approach 1:
The patent extracts the power supply path for the control unit from the main battery discharge path by providing a dedicated auxiliary power circuit. This auxiliary circuit directly connects the battery to the control unit, bypassing the inverter and other power conversion stages, thereby reducing battery power consumption.
3Loss of energy
If power passes through the bi-directional charger and inverter to supply standalone loads, then the loads receive power, but power transformation loss increases
Solution Approach 1:
The patent extracts and eliminates the bi-directional charger from the power path to standalone loads by implementing a dedicated inverter circuit that directly converts DC power to AC power for load supply. This removal of unnecessary conversion stages significantly reduces power transformation loss and increases the usage rate of solar panel power generation.
4Loss of energy
If the system uses a single bi-directional charger for both charging and discharging, then device complexity is reduced, but power transformation loss increases
Solution Approach 1:
The patent segments the power management functions into separate dedicated circuits: a charging circuit with charging switch, a discharging circuit with discharging switch, and an inverter circuit. Although this increases the number of components, each circuit is optimized for its specific function, resulting in reduced power transformation losses overall.
Solution Approach 2:
The patent implements dynamic switching between different power paths using control switches. The system can dynamically select the most efficient power path based on operational conditions (charging, discharging, grid-tied, or standalone mode), optimizing energy efficiency in real-time.
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
The system reduces power transformation losses by allowing direct charging of the battery and efficient power supply to loads, thereby increasing the usage rate of solar panel and battery power.
Implementation Method 1
at least one solar panel (10), wherein the solar panel supplies power
Data Source
AI summary
A hybrid solar power generation system includes at least one solar panel, at least one first switch, a rectifying control unit, at least one rechargeable battery, a DC (Direct Current) to AC (Alternating Current) inverter, at least one second switch, and a DC to DC charging unit and a system control unit; wherein the system control unit controls the first switch and the second switch to form a grid-tied path and a standalone path, the solar panel supplies power to a utility grid by the grid-tied path, and the solar panel supplies power to an AC load by the standalone path.