Power Conversion Device Sign Diagnosis for Fault Detection
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Solution Overview
Problem
Existing power conversion devices do not provide a clear indication of impending shutdown, leading to unnecessary system stoppages and prolonged restart times due to undetected faults and transient phenomena.
Innovation Solution
A power conversion device equipped with an abnormality detection unit, restart unit, and sign diagnostic unit that records and analyzes restart information to detect faults before system shutdown, minimizing non-operation time by automatically restarting and providing diagnostic warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system stops operation when fault content occurs predetermined times or more, then the reliability of the system is improved, but the loss of time increases because the user does not know the fault situation until the system stops
Solution Approach 1:
The control means performs preliminary diagnosis and notifies the user of fault situations before the system stops operation. By detecting fault content and determining abnormality in advance, the system provides early warning, allowing users to take preparatory actions rather than reacting after shutdown occurs.
Solution Approach 2:
The control means provides feedback to the user about fault situations through notification before system stoppage. This feedback mechanism allows users to understand the fault condition, prepare necessary members or restoration procedures, and minimize downtime by acting on the information provided.
2Reliability
If the system stops operation when fault content occurs predetermined times or more, then the reliability of the system is improved, but the productivity decreases due to manual restart procedures
Solution Approach 1:
The control means performs preliminary diagnosis and notifies users of fault situations before system stoppage, allowing users to prepare restoration procedures and necessary members in advance. This preparation reduces the time required for manual restart operations and minimizes overall system downtime.
Solution Approach 2:
The control means provides feedback about fault conditions to users before shutdown, enabling informed decision-making about restart procedures. This feedback allows users to understand what actions are needed for restoration, reducing idle time and improving system availability.
3Reliability
If the system stops operation when a single fault occurs due to transient phenomenon exceeds predetermined number of times, then the reliability is improved, but unnecessary stoppages occur
Solution Approach 1:
The control means performs preliminary analysis of fault patterns and distinguishes between transient phenomena and genuine abnormalities before triggering system stoppage. By evaluating fault content and occurrence patterns in advance, the system avoids unnecessary shutdowns caused by temporary fluctuations while still responding to genuine problems.
Solution Approach 2:
The control means dynamically adjusts its response based on fault patterns and occurrence frequency. Rather than using a fixed threshold, the system evaluates whether faults represent transient phenomena or genuine abnormalities, allowing flexible response that maintains reliability while avoiding unnecessary stoppages.
Data Source
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AI summary
Provided is a power conversion device with which it is possible to acquire a sign of a system stop before the system stops, and to minimize the nonworking time of the system. A power conversion device for converting DC voltage or AC voltage into AC voltage, the power conversion device being characterized by having an abnormality detection unit for detecting abnormalities in the power conversion device, a restart unit for stopping the power conversion device and automatically performing a restart when the abnormality detection unit has detected an abnormality, a restart recording unit for recording restart information of when the restart unit has restarted, and a sign diagnostic unit for inputting the restart information recorded by the restart recording unit and performing a sign diagnosis of the abnormality in the power conversion device on the basis of the restart information, the sign diagnostic unit performing the sign diagnosis on the basis of the number of restarts and outputting a sign diagnostic result.