Distributed Antenna DC Grid Control Under Network Failure
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Solution Overview
Problem
The existing power network systems integrated with communication networks lack resilience against failures, particularly when power routers and management servers are disconnected due to disasters, making it difficult to optimize and flexibly interchange power.
Innovation Solution
A network system integrating wireless base stations, distributed antennas, direct-current grids, power gates, and control devices that enable autonomous distributed and centralized control to manage power interchange among power devices, ensuring resilience through redundant communication paths and power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power routers are integrally controlled by a management server, then optimal power interchange can be achieved, but the system becomes vulnerable to failures when communication between power routers and management server is disrupted
Solution Approach 1:
The system divides control functionality into two segments: centralized control for normal operations and autonomous distributed control for failure scenarios. Each power router can operate independently using local information when communication with the management server is disrupted, ensuring continued power interchange capability while maintaining the ability to optimize centrally when communication is available.
Solution Approach 2:
The control mode of power routers changes based on communication status. When communication with the management server is normal, power routers operate under centralized control for optimal efficiency. When communication is disrupted, they switch to autonomous distributed control mode, changing the control parameter from centralized to distributed to maintain system resilience.
2Reliability
If autonomous distributed control is adopted among power routers, then system resilience against failures is improved, but the ability to optimize the entire system for efficient power interchange is reduced
Solution Approach 1:
The control system is designed to be dynamic, automatically switching between centralized and autonomous distributed control modes based on communication availability. This dynamic adaptation allows the system to maintain optimal performance when communication is available while ensuring resilience when communication is disrupted, resolving the trade-off between efficiency and reliability.
Solution Approach 2:
The system incorporates feedback mechanisms where power routers continuously monitor communication status with the management server and adjust their control mode accordingly. This feedback loop ensures that the system transitions smoothly between centralized optimization mode and autonomous resilience mode, maintaining both efficiency and reliability under different operating conditions.
3Adaptability or versatility
If communication networks are integrated with power networks, then comprehensive system management is achieved, but the system becomes more vulnerable to simultaneous failures in both networks
Solution Approach 1:
The patent extracts the essential control functionality from the centralized management server and embeds it within each power router as autonomous control capability. This extraction ensures that even if the communication network integrating power and communication systems fails, the core power interchange function can continue operating independently at each router, reducing vulnerability to simultaneous failures.
Solution Approach 2:
The system prepares for potential communication failures by pre-equipping power routers with autonomous distributed control capabilities. This beforehand cushioning ensures that when communication network failures occur, the power network can continue operating without immediate disruption, as each router can independently make control decisions based on local information.
Data Source
AI summary
A network system includes: a wireless base station configured to relay communication performed by wireless terminals; distributed antennas each being configured to be connected to the wireless base station and form a cell that enables communication with the wireless terminals; direct-current grids each being arranged in a predetermined form in a communication area formed by the cells and configured to interchange power with power devices connected to the subject direct-current grid; a power gate arranged between the direct-current grids located adjacent to each other and configured to interchange power between the adjacent direct-current grids; and a control device configured to control the power gate based on information acquired from the power devices via the distributed antennas. The power devices connected to the direct-current grids are configured to perform communication with the control device via the distributed antennas that form the communication area including the direct-current grids.