DC Power Distribution Control Using Converter Efficiency Feedback
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Solution Overview
Problem
Existing DC power supply and distribution systems do not consider efficiency losses from DC/DC converters, leading to overall system inefficiency, and prioritize power supply to high-consumption loads without optimizing system-wide efficiency.
Innovation Solution
A DC power supply and distribution system with multiple distribution lines, converters, detectors, and controllers that adjust DC powers to maximize efficiency by considering the efficiency of both converters and load states, optimizing voltage and power supply for each load type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DC power is supplied preferentially to loads with much power consumption, then power consumption of high-priority loads is satisfied, but system-wide efficiency is not optimized
Solution Approach 1:
The control device receives efficiency information from efficiency information acquisition devices monitoring each converter, and uses this feedback to dynamically adjust power distribution. The controller modifies power allocation based on real-time efficiency data, directing power through converters with higher efficiency rather than simply prioritizing high-consumption loads, thus resolving the contradiction between meeting power demands and optimizing system efficiency
Solution Approach 2:
The system transitions from static power distribution (fixed priority based on load consumption) to dynamic power distribution (adjustable based on real-time converter efficiency). The control device continuously adapts power allocation strategies according to changing efficiency conditions of different converters, enabling the system to optimize energy loss while still satisfying power requirements of high-consumption loads when appropriate
2Power
If power supply voltage is determined based on load consumption current, then load power requirements are met, but converter efficiency losses are not considered
Solution Approach 1:
Efficiency information acquisition devices continuously monitor and provide feedback on the efficiency of each converter to the control device. This feedback mechanism enables the system to understand the energy loss characteristics of different conversion paths and adjust power distribution accordingly, rather than simply matching voltage to load consumption current
Solution Approach 2:
The control device changes the operating parameters (power allocation) based on efficiency information from converters. By adjusting which converters are used and how much power they supply, the system optimizes the overall efficiency parameter while still meeting the power requirements of various loads, resolving the contradiction between power delivery and energy loss
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 enhances overall efficiency by controlling DC powers to maximize converter efficiency and minimizes power consumption for each load, thereby improving the entire system's efficiency and power distribution.
Implementation Method 1
The first converter converts a voltage supplied from a first power source to a plurality of DC voltages respectively corresponding to the loads
Implementation Method 2
The second converter converts a power supplied from a second power source into a plurality of DC powers respectively corresponding to the loads
Data Source
AI summary
The present DC power supply and distribution system includes a plurality of distribution lines provided respectively corresponding to a plurality of loads, a first converter to convert an AC voltage from a commercial AC power source into a plurality of DC voltages and supply the DC voltages respectively to the distribution lines, a second converter to convert a DC power from a power generation and storage source into a plurality of DC powers and supply the DC powers respectively to the distribution lines, and a power controller to control the DC powers such that the efficiency of the first converter is increased, based on information related to the efficiency of the second converter.