研究目的
To propose an actively controllable method for cable network switching and fault isolation in a constant voltage tree topology network for cabled ocean observatory systems.
研究成果
The proposed actively controllable constant current switching method for the tree topology network is more flexible and simpler than other methods. Moreover, the switching occurs at zero current and nearly zero voltage, which can prolong the lifetime of the interrupters to the greatest extent.
研究不足
1. The mechanical interrupters and diodes employed in the prototype had low voltage withstand ratings and should be replaced with appropriately rated components for real systems.
2. The method does not work for some topologies such as network with multiple branches or mesh-like network where the main current is distributed to multiple branches.
1：Experimental Design and Method Selection:
The study reviews existing switching methods and proposes a novel actively controllable method for a constant voltage tree topology network. It involves changing the feeding current to configure each branch of the network.
2：Sample Selection and Data Sources:
A laboratory prototype was built to demonstrate the features of backbone switching with zero current and low voltage.
3：List of Experimental Equipment and Materials:
The prototype included latch-type interrupters, solenoids, diodes, a switch controller, and a current sensing resistor.
4：Experimental Procedures and Operational Workflow:
The prototype was tested with and without faults to validate the switching behaviors of all relays.
5：Data Analysis Methods:
The switching behaviors were validated by regulating the line current and observing the status of the relays.
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