Digital Electricity Ranging for Capacitance-Limited Safe Power Transfer
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Solution Overview
Problem
Digital electricity power systems face challenges in maximizing the range of safe operation while detecting faults and preventing human shock and electrical fires, particularly due to high line-to-line capacitance and varying system parameters.
Innovation Solution
The method involves automatically configuring operating parameters to optimize safety, efficiency, and resiliency by measuring and comparing transmission line properties with predefined limits, dynamically reconfiguring these limits to ensure safe operation without interrupting power, and using biasing techniques to counteract capacitance effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed operating limits are used for packet energy transfer, then safety can be ensured, but the range of safe operation cannot be maximized due to varying system parameters like line-to-line capacitance
Solution Approach 1:
The patent implements dynamic adjustment of operating limits based on real-time measurement of system parameters. The controller continuously monitors line-to-line capacitance and other parameters, then automatically adjusts the operating limits to maximize the safe operating range while maintaining safety standards. This transforms the static, fixed-limit approach into a dynamic adaptive system that responds to changing conditions.
Solution Approach 2:
The patent changes the operating parameters (voltage, current, power limits) based on measured system characteristics. By measuring line-to-line capacitance and other parameters during system operation, the controller modifies the operating limits to match actual system conditions, thereby expanding the safe operating range while ensuring safety through parameter-based adaptation.
2Reliability
If manual configuration of operating parameters is used, then safety can be verified, but productivity is reduced due to required power interruptions and manual intervention
Solution Approach 1:
The system performs self-configuration of operating parameters through automatic measurement and adjustment. The controller autonomously measures system parameters, calculates appropriate operating limits, and applies them without requiring manual intervention or power interruptions. This self-service capability maintains safety verification while enabling continuous operation and improving productivity.
Solution Approach 2:
The patent performs preliminary measurement and configuration of operating parameters during system startup or before operation begins. By pre-measuring line-to-line capacitance and other parameters and configuring limits in advance, the system eliminates the need for interruptions during operation, thereby maintaining safety verification while ensuring continuous productivity.
3Length of stationary object
If high line-to-line capacitance is present, then power can be transmitted over longer distances, but fault detection precision deteriorates due to capacitance effects masking fault signals
Solution Approach 1:
The patent implements feedback mechanisms where the system continuously monitors both power transmission parameters and fault detection signals. By measuring line-to-line capacitance and comparing it against known values, the system adjusts operating parameters to compensate for capacitance effects on fault detection. This feedback loop maintains measurement precision even at high capacitance levels corresponding to long transmission distances.
Solution Approach 2:
The system applies preliminary countermeasures by measuring line-to-line capacitance before operation and pre-adjusting operating parameters to compensate for expected capacitance effects. By anticipating the masking effect of high capacitance on fault signals and pre-configuring appropriate detection thresholds and operating limits, the system maintains fault detection precision across varying transmission distances.
Data Source
AI summary
A set of packet-energy-transfer operating parameters is automatically configured to optimize safety, efficiency and/or resiliency in a digital-electricity power system. A set of limits is configured for packet-energy-transfer operation that does not immediately preclude safe operation of the transmission lines, wherein each limit in the set defines constraints for at least one of measurements and calculations based on impedance in series or in parallel with the transmission lines, operational efficiency of the digital-electricity power system, and/or voltage or current signal integrity. The operation of the transmission lines is measured, and the measurements are compared with the limits. Upon at least one of the limits being exceeded, a revised set of limits is automatically configured (or a new configuration is generated) based on which limit was exceeded. The measurements, comparison, and reconfiguration are repeated until an acceptable range of operation is identified or until a predetermined time limit is exceeded.