Aircraft Power Network Switching for Fault-Isolated Load Sharing
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Solution Overview
Problem
Aircraft electrical power systems face challenges in achieving resilience against electrical failures while maintaining efficient load sharing and uniform power source discharge, as conventional approaches either segregate power lanes for safety, preventing load sharing, or unify them, risking fault propagation and uneven power demand.
Innovation Solution
The electrical power system employs a partially unified network with time-variable partial load sharing configurations, allowing for sequential switching between different modes to achieve load sharing across power sources and isolate faults, combining the benefits of segregation and unification for enhanced resilience and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power lanes are segregated for safety, then fault propagation is prevented, but load sharing across power sources is prevented
Solution Approach 1:
The system dynamically reconfigures the power distribution network by switching between segregated and unified configurations based on operational conditions. The controller adjusts the connectivity of power lanes in real-time, enabling the system to transition from a static segregated architecture to a dynamic hybrid architecture that can adapt between safety-oriented segregation and efficiency-oriented unification.
Solution Approach 2:
The power distribution network is divided into multiple independently controllable power lanes that can be selectively connected or disconnected. Each power lane operates as a separate segment that can be isolated for fault containment or connected for load sharing, allowing the system to achieve both fault isolation and load sharing through selective segmentation and reconfiguration.
2Productivity
If power lanes are unified for load sharing, then efficient power distribution is achieved, but fault propagation risk increases
Solution Approach 1:
The system employs dynamic reconfiguration to switch between unified and segregated states. During normal operation, power lanes are unified to enable efficient load sharing. When faults are detected, the controller dynamically segregates the affected lanes, maintaining reliability while preserving load sharing capabilities in unaffected portions of the network.
Solution Approach 2:
The controller acts as an intermediary that manages the connectivity between power lanes. It selectively connects or disconnects lanes based on system conditions, enabling the network to transition between unified and segregated configurations. This intermediary control mechanism allows the system to achieve both load sharing efficiency and fault propagation resistance through intelligent routing decisions.
3Reliability
If sequential switching between load sharing modes is implemented, then uniform power source discharge is achieved, but system complexity increases
Solution Approach 1:
The controller implements periodic switching between different load sharing modes to distribute the discharge burden uniformly across all power sources. By systematically rotating through different configuration patterns, the system ensures that each power source contributes equally to the total load over time, achieving uniform discharge through periodic reconfiguration.
Solution Approach 2:
The system monitors the state of power sources and adjusts the switching sequence based on real-time conditions. The controller uses feedback from power source status to optimize the sequential switching pattern, ensuring uniform discharge while adapting to changing operational requirements. This feedback mechanism simplifies control by using straightforward monitoring and switching logic rather than complex optimization algorithms.
Data Source
Figure 1
Figure 2~3
Figure 4a)~5d)
AI summary
An electrical power distribution network (306) of an electric power system (300) of an aircraft is operated such that it sequentially adopts a plurality of different partial load sharing modes in a time variable manner, which provide for partial load sharing across electrical power sources (A, B, C, D) with respect to associated electrical loads (AA, BB, CC, DD), by sequentially switching between a plurality of different partial load sharing configurations of the electrical power distribution network, each partial load sharing configuration being associated to a particular one of the partial load sharing modes.