Automated Three-Winding Transformer Test Device
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Solution Overview
Problem
Current methods for testing three-winding transformers lack automation and require significant rewiring to determine parameters such as transformation ratios, static or dynamic resistances, and leakage reactance, making the process inefficient and time-consuming.
Innovation Solution
A transformer testing device that can simultaneously connect to all three windings of a three-winding transformer, utilizing an expansion device with additional terminals and controllable switching means to apply test signals and evaluate responses without rewiring, allowing for automated determination of multiple transformer parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If traditional transformer testing methods are used for three-winding transformers, then parameter determination is possible, but significant rewiring is required and automation is lacking
Solution Approach 1:
The testing device is designed with a universal connection structure that can test multiple parameters (transformation ratios, static resistance, leakage reactance) across all three windings simultaneously using a fixed wiring configuration. The device incorporates multiple measurement circuits and switching mechanisms that enable it to perform various testing functions without requiring physical rewiring, thus achieving multi-functionality and automation.
Solution Approach 2:
The device employs dynamic switching mechanisms and controllable connection means that can electronically reconfigure measurement paths during operation. This allows the system to adapt its internal connectivity through electronic control rather than physical rewiring, enabling automated parameter determination while maintaining a fixed physical structure.
2Measurement precision
If multiple transformer parameters are measured, then comprehensive testing is achieved, but the testing process becomes time-consuming without automation
Solution Approach 1:
The testing device is designed to measure multiple parameters continuously in an automated sequence without interruption. The system can determine transformation ratios, static resistance, and leakage reactance of all three windings in a continuous testing process, eliminating the need for manual reconfiguration between measurements and significantly reducing total testing time while maintaining comprehensive measurement coverage.
Solution Approach 2:
The device performs preliminary setup and configuration automatically before actual measurements begin. Connection means are pre-configured to access all three windings, and measurement sequences are pre-programmed, allowing the system to immediately start comprehensive parameter measurement without manual preparation time, thus reducing overall testing duration.
3Adaptability or versatility
If a fixed connection structure is used, then device simplicity is maintained, but adaptability to different testing configurations is reduced
Solution Approach 1:
The device incorporates an intermediary switching mechanism that acts as a mediator between the fixed connection structure and the various testing requirements. This switching system allows the device to adapt to different testing configurations (different parameters, different windings) by electronically reconfiguring measurement paths without changing the physical connection structure, thus maintaining structural simplicity while achieving high adaptability.
Data Source
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AI summary
In order to test a three-winding transformer (60), a transformer test device (2) comprises one or more sources (13) for generating test signals for the three-winding transformer (60), a measuring device (14, 16) for detecting a test response of the three-winding transformer (60) and connections (12) for detachably connecting the transformer test device (2) to the three-winding transformer (60). The connections (12) comprise at least one connection for connection with a tertiary winding (66) of the three-winding transformer (60).