DC Grid Cell Coordination for Resilient Power-Communication Networks
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Solution Overview
Problem
Large power grids face high establishment and operation costs, are vulnerable to natural disasters, and require complex optimization mechanisms to enhance resilience and coordination between power and communications networks.
Innovation Solution
A power and communications network convergence system integrating wireless base stations and direct-current grid groups, where each direct-current grid performs autonomous and distributed control to stabilize power supply and interchanging power with adjacent grids, leveraging MEC servers for information sharing and global optimization control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large power grid is established to cover wide areas and connect multiple infrastructures, then power supply coverage and system integration are improved, but establishment and operation costs increase significantly
Solution Approach 1:
The patent divides the large power grid into multiple small-scale direct-current grids, each serving a specific cell area. These modular units can be independently established and operated, reducing the upfront cost and complexity of building a large-scale grid while still achieving wide-area coverage through networked operation of multiple small grids.
2Reliability
If a large centralized power grid is used to ensure stable power supply, then power supply stability is improved, but vulnerability to large-scale damage from natural disasters increases
Solution Approach 1:
By segmenting the power grid into multiple independent small-scale direct-current grids, the system ensures that a natural disaster affecting one cell does not cause widespread damage across the entire power network. Each cell can operate autonomously, maintaining local power supply stability even when other cells are affected by disasters.
3Ease of operation
If autonomous distributed control is used in small-scale grids, then system complexity is reduced and ease of operation is improved, but coordination and global optimization capability deteriorate
Solution Approach 1:
The patent merges multiple autonomous small-scale direct-current grids into a coordinated network where cells can exchange power and information. This combination allows each cell to maintain autonomous operation for ease of control while the network-level coordination provides global optimization capability, balancing both requirements through hierarchical control structure.
Data Source
AI summary
Provided is an power and communications network convergence system including wireless base stations, and DC grid groups, each grid group belonging to a cell. Each grid in the grid group has a DC line to which devices including a power generator and a power-storage are connected, and performs, based on state-information on each device, first control for reducing power fluctuations in the line. A first grid belonging to a cell performs, based on state-information on each grid, second control for interchanging power with a second grid belonging to the cell. If a power situation of a first grid group belonging to a first cell and a power-situation of a second grid group belonging to a second cell satisfy a preset condition, the first grid group performs third control for interchanging power with the second grid group.