Electric Power Conversion Circuit With Reactors And Switches
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Solution Overview
Problem
Conventional electric power transmission systems require a large number of transmission lines and converters, leading to increased costs and inefficiencies, especially in small-scale networks with fluctuating renewable energy sources, as they struggle to simultaneously transmit power between multiple systems and adjust voltage levels effectively.
Innovation Solution
An electric power conversion circuit with a full-bridge configuration using switches and reactors, capable of bidirectional power conversion, which modulates and demodulates power using code sequences to efficiently transmit and receive power while reducing the number of transmission lines and apparatus size, and adjusts voltage levels through controlled switching states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electric power transmission systems use multiple transmission lines and converters to transmit power between multiple systems, then power transmission capability is improved, but system complexity and cost increase
Solution Approach 1:
The patent combines multiple full-bridge circuits into a single integrated converter that can simultaneously transmit power between multiple systems. The converter includes a first full-bridge circuit for transmitting power from a first system to a second system, and a second full-bridge circuit for transmitting power from a third system to a fourth system, both integrated within one device structure. This merging approach maintains the power transmission capability of multiple separate converters while reducing overall system complexity and cost.
2Adaptability or versatility
If conventional systems use multiple converters to adjust voltage levels for different systems, then voltage adaptation capability is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal converter design where each full-bridge circuit can operate independently to perform voltage level adaptation for different system pairs. The first full-bridge circuit adapts voltage between the first and second systems, while the second full-bridge circuit adapts voltage between the third and fourth systems. This multi-functional approach allows a single device to replace multiple specialized converters, maintaining voltage adaptation capability while reducing overall device complexity.
3Adaptability or versatility
If conventional transmission systems are designed to handle fluctuating renewable energy, then energy source compatibility is improved, but system stability deteriorates
Solution Approach 1:
The patent segments the power conversion function into independent full-bridge circuits, where each circuit can independently handle power conversion for different renewable energy sources. The first full-bridge circuit processes power from one energy source while the second full-bridge circuit processes power from another energy source. This segmentation allows the system to accommodate various fluctuating renewable energy sources without allowing instability in one circuit to affect the other, thereby maintaining system stability while improving energy source compatibility.
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 solution enables efficient, simultaneous power transmission between multiple systems with reduced infrastructure costs and improved power adjustment capabilities, enhancing the stability and efficiency of small-scale renewable energy networks.
Implementation Method 1
a first reactor connected between a first node, in which the first and second legs are connected to each other, and a fifth node, in which the third and fourth legs are connected to each other; a second reactor connected between a second node, in which the first and second legs are connected to each other, and a sixth node, in which the third and fourth legs are connected to each other
Data Source
AI summary
An electric power conversion circuit includes: a first leg including first and third switches; a second leg including second and fourth switches; a third leg including fifth and seventh switches; a fourth leg including sixth and eighth switches; a first reactor connected between a first node, in which the first and second legs are connected to each other, and a fifth node, in which the third and fourth legs are connected to each other; a second reactor connected between a second node to which the first and second legs are connected and a sixth node to which the third and fourth legs are connected; a first port terminal connected to the first node; a second port terminal connected to the sixth node; a third port terminal connected to a midpoint of each of the first and third legs; and a fourth port terminal connected to a midpoint of each of the second and fourth legs.