Mobile Micro-Grid Ring Bus for Stable Power Transfer
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Solution Overview
Problem
Conventional micro-grid systems are primarily fixed and lack mobility, making them unsuitable for applications that require movement, such as military purposes, and they do not efficiently manage fuel consumption in generators.
Innovation Solution
A mobile micro-grid system comprising movable units with energy source converters, power line connecting portions, and a central power controller that manages power distribution and phase difference to optimize energy transfer between units, forming a closed-loop ring bus for stable operation and reduced fuel consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional fixed micro-grid systems are used, then system stability is maintained, but mobility and adaptability are lost
Solution Approach 1:
The micro-grid system is divided into multiple independent movable micro-grid units, each capable of autonomous operation. This segmentation enables individual units to be moved independently while maintaining overall system functionality, resolving the contradiction between mobility and stability.
Solution Approach 2:
The system transitions from a fixed configuration to a dynamic, movable configuration. Each micro-grid unit can be relocated as needed, and the control system dynamically adjusts power flow and phase differences to maintain stability during and after movement operations.
2Reliability
If multiple movable micro-grid units are connected to form a ring bus, then system stability and power transfer reliability are improved, but system complexity increases
Solution Approach 1:
Multiple micro-grid units are connected in a ring bus configuration where external power lines are interconnected through internal power lines. This merging creates redundant power transfer paths, improving reliability while the modular nature of each unit keeps individual complexity manageable.
Solution Approach 2:
The control system continuously monitors power flow, phase differences, and system status across the ring bus configuration. Real-time feedback enables automatic adjustment of power transfer parameters, maintaining stability despite the increased system complexity of multiple interconnected movable units.
3Use of energy by moving object
If diesel generators operate without centralized coordination, then unit autonomy is maintained, but fuel consumption efficiency decreases
Solution Approach 1:
The central power controller performs multiple functions including phase difference calculation, power flow optimization, and coordinated control of diesel generators across all micro-grid units. This universal control approach improves fuel efficiency by optimizing overall system operation while managing the necessary control complexity centrally.
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 easy construction and stable operation of a movable micro-grid system, improving fuel efficiency by optimizing diesel generator usage and ensuring reliable power distribution through efficient power transfer between units.
Implementation Method 1
a diesel AC/DC converter configured to receive energy from a diesel generator and to provide the same to a DC bus
Implementation Method 2
a photovoltaic DC/DC converter configured to receive energy from a photovoltaic generator and to provide the same to a DC bus
Implementation Method 3
an ESS DC/DC converter configured to transfer energy between an energy storage device and the DC bus in both directions
Implementation Method 4
a bus DC/AC converter configured to transfer energy between the DC bus and the internal power line
Data Source
AI summary
The present disclosure related to a mobile micro-grid unit and a micro-grid system. An aspect of the present embodiment provides a mobile micro-grid system including: two or more movable micro-grid units configured to receive energy from an energy source so as to supply the energy to an internal power line and configured to provide energy of the internal power line to loads; and external power lines configured to be connected between the micro-grid units, wherein the external power lines are connected to each other through the internal power lines so as to form a closed-loop type ring bus.