ORING Fault Detection in Parallel Power Modules Before Startup
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Solution Overview
Problem
Existing ORING fault detection methods in power supply systems require coordination with a monitoring module and cannot detect faults before system startup, leading to potential system shutdowns due to single-point failures.
Innovation Solution
A method and system for ORING fault detection that allows independent detection by power supply modules, involving time-sharing startup of primary and secondary units, delayed voltage checks, and threshold-based analysis of output current and voltage differences to determine ORING unit health.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing ORING fault detection method is used that requires coordination with the monitoring module, then the detection can be performed, but the system cannot achieve independent self-detection and is vulnerable to monitoring module failures
Solution Approach 1:
The power supply module is equipped with independent detection capabilities through its control unit, which can autonomously detect ORING unit faults using voltage and current measurements without requiring the monitoring module. This self-service approach eliminates the single point of failure associated with centralized monitoring while maintaining detection functionality.
Solution Approach 2:
The fault detection function is extracted from the centralized monitoring module and embedded directly into the power supply module's control unit. This extraction creates an independent detection pathway that operates separately from the monitoring module, ensuring detection capability even when the monitoring module fails.
2Reliability
If the ORING fault detection is started after all power supply modules are running normally, then the system is stable, but faults present at initial power on cannot be detected leading to system shutdown
Solution Approach 1:
The control unit performs preliminary ORING fault detection during the startup sequence, specifically measuring bus voltage within a first delay period after primary units are started. This preliminary action detects faults before they can cause system shutdown, while the delayed measurement approach ensures the system is stable enough for accurate detection.
Solution Approach 2:
The detection method proactively identifies ORING faults during startup before they can lead to harmful effects like system shutdown. By detecting and potentially isolating faults in advance, the system prevents the negative outcomes that would otherwise occur.
3Ease of operation
If voltage or current measurement is used for ORING fault detection, then the detection method is simple, but it cannot detect faults before system startup or operate independently
Solution Approach 1:
The control unit within the power supply module independently performs fault detection using voltage and current measurements, eliminating the need for external monitoring module coordination. This self-service capability maintains the simplicity of the measurement method while achieving independent operation.
Solution Approach 2:
The control unit is designed to perform multiple functions: normal power supply control, independent ORING fault detection, and startup-phase fault detection. This multi-functionality allows the same simple measurement approach to work across different operational phases without requiring additional complex systems.
Data Source
AI summary
An ORING fault detection method and a power supply system are provided. The method may be applied to a power supply system including a plurality of power supply modules connected in parallel. The ORING fault detection method includes: starting primary units of the plurality of power supply modules in a time-sharing manner; starting secondary units of the plurality of power supply modules within a first delay; if a bus voltage at an output end of the power supply module within the first delay is within a first threshold range, initiating ORING detection of the power supply module, including: determining whether an ORING unit is in a healthy state by judging whether an output current of the power supply module has a negative current, or whether a voltage difference before and after the ORING unit of the power supply module is less than a preset value.