Subsea Power Switch With Automatic Fault Isolation
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Solution Overview
Problem
Subsea electrical failures in power distribution systems lead to significant production losses and high intervention costs, necessitating technologies that minimize failure probability and maximize system availability.
Innovation Solution
A subsea power switch combining semiconductor design with software control for automatic and independent isolation of electrical faults, enabling continuous monitoring and flexible operation of subsea consumers, with capabilities for AC and DC current switching, cable integrity checks, and ultra-fast fault isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional power distribution systems are used without automatic fault isolation, then system simplicity is maintained, but production loss and intervention cost increase dramatically upon electrical failures
Solution Approach 1:
The power distribution system is segmented into independently controllable sections through the power switch device. Each power switch can independently isolate faults in specific cable connections or consumers, preventing fault propagation to other parts of the system. This segmentation enables localized fault management while maintaining overall system availability.
Solution Approach 2:
The power switch device performs preliminary actions by continuously monitoring electrical parameters and automatically detecting faults before they cause catastrophic system failures. The device is pre-configured with isolation capabilities that are activated automatically upon fault detection, eliminating the need for manual intervention and reducing response time.
2Loss of time
If manual fault isolation methods are used, then device complexity is minimized, but loss of production and intervention costs increase significantly
Solution Approach 1:
The power switch device provides self-service functionality by automatically detecting electrical faults through integrated sensors and independently executing isolation actions without external control. The device monitors its own operational status and autonomously responds to fault conditions, eliminating dependency on manual intervention and significantly reducing fault isolation time.
Solution Approach 2:
The device incorporates continuous feedback mechanisms through electrical parameter monitoring that provides real-time information about system status. This feedback enables the power switch to detect anomalies, diagnose fault conditions, and trigger appropriate isolation actions automatically, creating a closed-loop control system that responds dynamically to changing conditions.
3Difficulty of detecting and measuring
If comprehensive monitoring of all subsea consumers is implemented, then fault detection capability is improved, but device complexity and cost increase
Solution Approach 1:
The monitoring system implements local quality by focusing measurement capabilities on critical electrical parameters at specific locations within the power distribution system. Rather than comprehensively monitoring all parameters throughout the entire system, the power switch devices monitor key parameters locally at each switching point, providing sufficient fault detection capability with minimized complexity.
Data Source
AI summary
A communication distribution unit, containing at least one power switch, said communication distribution unit comprising for an at least one consumer a power switch (4) based on a semiconductor design to switch on and off output lines (3) for the at least one consumer and the power switch (4) comprises at least one switching module (5).