UPS Module Idle State Testing for Fault Detection
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Solution Overview
Problem
Existing UPS systems lack an efficient method for testing multiple UPS modules while maintaining power to the load, making it difficult to diagnose faulty components without interrupting power provision.
Innovation Solution
A method is introduced where a UPS module is placed in an idle state, allowing for diagnostic tests to be performed without affecting the power supply, by configuring it to provide no power to the load and comparing its test response to predetermined values to identify potential faults in components such as power supplies, fans, and conversion circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If diagnostic tests are performed on UPS modules, then fault detection capability is improved, but power supply continuity deteriorates
Solution Approach 1:
The UPS system is divided into multiple independent UPS modules that can be tested individually. Each module can be placed in an idle state for diagnostic testing while other modules continue to provide power to the load, enabling fault detection without interrupting overall system operation.
Solution Approach 2:
The system proactively places UPS modules in an idle state before faults occur, allowing diagnostic tests to be performed in advance. This preliminary testing identifies potential failures before they disrupt power supply, maintaining continuity while improving detection capability.
2Productivity
If UPS modules are tested while providing power to load, then system availability is improved, but testing accuracy deteriorates
Solution Approach 1:
The UPS module dynamically transitions between operational state (providing power to load) and idle state (receiving diagnostic tests). This dynamic state change allows the module to fulfill both requirements: maintaining system availability when operational and enabling accurate testing when idle.
Solution Approach 2:
The control circuit acts as an intermediary that manages the transition between operational and idle states. It coordinates the switching of contactors to isolate the module from the load before testing, ensuring both system availability and testing accuracy are maintained.
3Power
If all UPS modules operate in parallel, then power capacity is improved, but fault identification difficulty increases
Solution Approach 1:
The parallel UPS module architecture is segmented into individually testable units. By isolating one module at a time for diagnostic testing while others remain operational, the system maintains total power capacity while simplifying fault identification to a single module level.
Solution Approach 2:
The control circuit provides feedback by comparing actual test responses from each UPS module against expected responses. This feedback mechanism automatically identifies which specific module in the parallel configuration is faulty, making fault detection straightforward despite multiple modules operating together.
Data Source
AI summary
A method of operating an Uninterruptible Power Supply (UPS) system can be provided by activating an idle state for a UPS module included in the UPS system and providing a UPS module test input to the UPS module in the idle state. A UPS module test response can be provided from the UPS module in the idle state, to the UPS module test input. The UPS module test response can be compared to a predetermined UPS module test response and the UPS module can be identified as a potentially faulty UPS module responsive to determining that the UPS module test response varies from the predetermined UPS module test response by more than a threshold value.