Concurrent Transformer Testing System for Multi-Ratio Winding Analysis
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Solution Overview
Problem
Conventional methods for testing current transformers are labor-intensive and time-consuming, requiring multiple tests for each winding combination in multi-ratio transformers, which increases testing time significantly.
Innovation Solution
A system and method that applies an input voltage to the secondary winding of a transformer to induce a voltage in the primary winding, allowing simultaneous measurement of secondary voltages across multiple windings, enabling the calculation of winding ratios, saturation curves, and knee points in a single test, thereby reducing the need for repetitive lead switching and manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional test methods are used for multi-ratio current transformers, then each winding combination can be tested individually with proper measurement, but the testing process becomes labor-intensive and time-consuming due to repeated lead switching and multiple tests
Solution Approach 1:
The patent combines multiple separate tests into a single concurrent test by connecting multiple secondary windings in parallel and applying a single test signal. This allows simultaneous measurement of multiple winding combinations without repeated lead switching, directly reducing testing time while maintaining measurement accuracy through coordinated measurement of primary current and secondary voltages.
Solution Approach 2:
The testing system is designed to perform multiple testing functions simultaneously - it can test multiple winding combinations, calculate multiple ratios, and determine saturation characteristics all in one test sequence. The system universally handles different tap combinations without requiring separate test configurations for each winding pair.
2Reliability
If multiple tests are performed for each winding combination in multi-ratio transformers, then comprehensive characteristics can be evaluated, but the process becomes more complex and requires frequent manual intervention
Solution Approach 1:
Multiple test procedures are merged into a single concurrent testing operation. The system applies one test signal to the primary winding and simultaneously measures responses from multiple secondary windings, eliminating the need for separate tests for each winding combination and reducing manual intervention requirements.
Solution Approach 2:
The system automatically calculates winding ratios and saturation characteristics for all tested combinations without requiring manual calculation or intervention. The controller processes all measurement data automatically, generating comprehensive evaluation results for multiple winding combinations from the single test sequence.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces testing time by allowing concurrent measurement and calculation of transformer characteristics for all winding combinations during a single test, enhancing efficiency and accuracy in evaluating current transformers.
Implementation Method 1
applying an input voltage to a secondary winding of the transformer in order to induce a voltage in a primary winding of the transformer
Data Source
AI summary
A tester for testing a transformer is provided. The tester comprises a primary voltmeter and a plurality of secondary voltmeters. The tester may also comprise an ammeter in series with a voltage source configured to apply voltage to the transformer. The primary voltmeter is configured to measure voltage induced across a primary winding of the transformer, while the secondary voltmeters may simultaneously measure voltage outputs at secondary windings of the transformer. The tester is configured to calculate ratios, saturation curves, and knee points for multiple winding combinations based on the measurements simultaneously obtained by the ammeter and the primary and secondary voltmeters.