Transformer Relay Ratio Verification Algorithm
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Solution Overview
Problem
Conventional transformer protecting relays malfunction when the transformation ratio is incorrectly set by the user, leading to system instability and potential accidents.
Innovation Solution
A transformer protecting relay and method that determines whether the transformation ratio is correctly set using an inner algorithm, comparing the product of the voltage and current ratios to a predetermined range, and outputs a result to inform the user and prevent malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the user sets the voltage ratio and current ratio manually, then the transformation ratio can be configured flexibly, but the relay may malfunction due to incorrect settings
Solution Approach 1:
The control module performs preliminary verification of the transformation ratio by calculating the product of voltage ratio and current ratio and comparing it with a predetermined range before the relay operates. This preliminary check prevents incorrect settings from causing malfunctions, thus resolving the contradiction between flexible configuration and operational reliability.
2Reliability
If the relay uses an inner algorithm to verify the transformation ratio, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The control module verifies the transformation ratio by checking whether the product of voltage ratio and current ratio falls within a predetermined range. This parameter-based verification method achieves reliable setting validation through simple mathematical operations, avoiding complex verification logic while maintaining high reliability.
Data Source
AI summary
Disclosed are a relay and method for protecting a transformer, and a transformer protecting system having the same. In the present disclosure, whether a transformation ratio of a transformer has been correctly set or not may be determined based on an inner algorithm. If it is determined that the transformation ratio of the transformer has been incorrectly set, a user may be informed to reset the transformation ratio. This may prevent a malfunction of the relay when the system is operated, and may enhance a system stability.