Power Supply System with Bidirectional Interleaved Converter
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Solution Overview
Problem
Existing power supply systems face inefficiencies in power conversion and quality due to the consumption of power during voltage conversion and deterioration of power quality, leading to reduced lifespan of storage devices and increased maintenance costs.
Innovation Solution
A power supply system incorporating a unidirectional converter and a bidirectional interleaved converter, with a path forming device that dynamically adjusts power transfer paths based on power generation, storage, and load conditions, optimizing power transfer efficiency and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If voltage conversion is performed using conventional converters, then power can be transferred between different voltage levels, but power is consumed during conversion and power quality deteriorates
Solution Approach 1:
The power conversion system is segmented into multiple parallel conversion paths (first converter and second converter) that operate simultaneously. Each converter handles a portion of the total power conversion, distributing the conversion stress and reducing overall power loss and quality deterioration compared to a single converter handling all conversion tasks.
Solution Approach 2:
Multiple converters are merged into a unified power conversion system where the first converter and second converter work in parallel. Their outputs are combined to provide the total required power conversion, achieving both voltage level transformation and improved efficiency through coordinated operation of multiple conversion units.
2Loss of energy
If multiple converters are used to improve power conversion efficiency, then power loss is reduced, but system complexity increases
Solution Approach 1:
The first converter and second converter are designed with multi-functionality, capable of operating in different modes (power factor correction mode, voltage conversion mode, regenerative braking mode). This universal design allows a single converter architecture to perform multiple functions, reducing the need for separate dedicated converters for each function and thereby managing system complexity while maintaining efficiency.
Solution Approach 2:
The system dynamically switches between different converter configurations and operating modes based on real-time power generation, storage, and load conditions. The path forming device dynamically reconfigures which converters are active and in what modes, allowing the system to adapt to varying conditions and maintain optimal efficiency without requiring permanently active complex circuitry for all possible operating scenarios.
3Productivity
If conventional path setting is used to manage power flow, then power can be routed between components, but maintenance costs increase due to reduced storage device lifespan
Solution Approach 1:
The control device continuously monitors power generation amount, storage device charge state, and load requirements, using this feedback information to dynamically adjust power flow paths and converter operating modes. This feedback mechanism ensures optimal power routing that protects the storage device from excessive current stress and voltage fluctuations, thereby extending its lifespan and reducing maintenance costs while maintaining high transfer efficiency.
Solution Approach 2:
The path forming device preliminarily configures optimal power flow paths based on predicted operating conditions and storage device state. By proactively managing power routing before stress conditions occur, the system prevents damage to the storage device and extends its operational life, reducing maintenance requirements while ensuring efficient power transfer when needed.
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 power conversion efficiency and quality, extends the lifespan of storage devices, and reduces overall system maintenance and manufacturing costs by adaptively managing power transfer paths.
Implementation Method 1
a power supply that generates DC power may perform photovoltaic power generation
Implementation Method 2
a power supply that generates DC power may perform photovoltaic power generation, fuel cell power generation, wind power generation
Implementation Method 3
a power supply that generates DC power may perform photovoltaic power generation, fuel cell power generation
Implementation Method 4
an apparatus that performs reverse conversion of a received DC power into an AC power and supplies the AC power to a system is called a grid-interactive inverter
Data Source
AI summary
The present invention relates to a power supply system and method including a power generator and a storage device. Specifically, the power supply method using a power supply system which includes a power generator, a storage device, a unidirectional converter, and a bidirectional interleaved converter, and in which the other side of the unidirectional converter is connected to the other side of the bidirectional interleaved converter and power is output from the other side of the unidirectional converter, the power supply method comprises measuring one or more of an amount of power generation of the power generator and an amount of power storage of the storage device; forming a power transfer path by analyzing one or more of the amount of power generation and the amount of power storage; and controlling activation of devices on the formed power transfer path.