Power Distribution Subunit Synchronization for Leak Detection
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Solution Overview
Problem
In multi-unit power distribution networks, synchronizing remote subunits to ensure safe and concurrent power delivery while preventing improper shutdowns and detecting inadvertent loads, such as human contact with power conductors, is challenging due to regulatory limitations on current and voltage levels.
Innovation Solution
The system selectively opens and closes a switch at the power source to send synchronization signals to remote subunits, enabling leak detection and ensuring that subunits power on and off in sync, thus allowing concurrent power delivery and improving safety features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple conductors are used to split current from the power source, then the current on any one electrical conductor is below the regulated limit, but the device complexity increases
Solution Approach 1:
The patent employs periodic switching of a single power conductor between connected and disconnected states. The switch controller periodically opens the switch to disconnect the load, measures current to detect human contact, then closes the switch to resume power delivery. This periodic action allows safety monitoring without requiring multiple conductors, resolving the contradiction between safety compliance and device complexity.
2Power
If high voltage is used to deliver remote power, then lower current can be distributed at the same power level, but regulations may limit the voltage to prevent undesired current flow through a human
Solution Approach 1:
The patent implements preliminary safety measures by periodically disconnecting the power conductor before measuring current. The switch is opened in advance to isolate the load, then current measurement is performed on the disconnected conductor to detect human contact. This preliminary disconnection action allows the system to safely monitor for electrocution risks while maintaining the ability to deliver high voltage power when safe, resolving the contradiction between power delivery capability and electrocution risk.
3Reliability
If the remote subunit is disconnected from the power source to measure activity on the power conductors, then safety detection is improved, but power delivery is interrupted
Solution Approach 1:
The patent uses periodic switching to balance safety detection and power delivery continuity. The switch controller periodically opens the switch for brief intervals to perform current measurement and safety detection, then immediately closes the switch to resume power delivery. This periodic action minimizes interruption duration while maintaining effective safety monitoring, resolving the contradiction between safety detection and power delivery continuity.
4Reliability
If leak detection is enabled at the power source, then safety features are improved, but the system requires synchronization mechanisms to coordinate multiple subunits
Solution Approach 1:
The patent implements self-service synchronization where each remote subunit independently generates its own synchronization signal based on detecting voltage drops on the power conductor. When the power source opens the switch, it creates a voltage drop that all subunits detect simultaneously. Each subunit autonomously uses this detected signal to coordinate its operations without requiring complex external synchronization mechanisms, resolving the contradiction between safety features and device complexity.
Data Source
AI summary
Systems and methods for synchronizing subunits a multi-unit power distribution network contemplate selectively opening and closing a switch at the power source to disconnect and reconnect the power source to power conductors to send a synchronization signal to one or more remote subunits. Once the remote subunits are synchronized and able to disconnect from the power conductors, leak detection at the power source may be enabled to detect inadvertent loads on the power conductors (e.g., a human touching the power conductors). Further, the remote subunits may power off and on based on the synchronization signal thereby ensuring that an end device may receive power concurrently from multiple remote subunits so as to meet the power requirements of the end device. Enabling the leak detection improves the safety features of the power distribution network and synchronized power delivery to the end device prevents improper shut downs.