Dry-Type Transformer Overtemperature Detection Across Cooling States
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing overtemperature detecting systems for dry-type transformers cooled by cooling devices face challenges in accurately detecting temperature abnormalities, which can lead to inadequate protection.
Innovation Solution
An overtemperature detecting system that includes a temperature determining unit, which changes determination conditions based on the operation states of the cooling device during operation and shutdown to detect temperature abnormalities, using multiple temperature detectors and logic circuits to output accurate alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temperature detector is disposed near the transformer to indirectly detect temperature, then direct contact measurement is avoided, but detection accuracy for appropriate protection cannot be acquired
Solution Approach 1:
The patent applies dynamics by making the determination conditions variable rather than fixed. The temperature determination unit changes determination conditions based on the cooling device's operation state (operating or stopped), allowing the system to adapt to different thermal environments and maintain accurate temperature assessment throughout various operational phases of the transformer
Solution Approach 2:
The patent implements parameter changes by adjusting determination conditions (such as temperature thresholds or comparison criteria) according to the cooling device's operational state. When the cooling device operates versus when it stops, different determination parameters are applied to account for the resulting temperature variations, thereby maintaining detection accuracy across different operating scenarios
2Measurement precision
If fixed determination conditions are used for temperature abnormality detection, then the system is simple to operate, but accurate detection during different cooling device states cannot be achieved
Solution Approach 1:
The system transitions from static to dynamic determination conditions. The temperature determining unit automatically adjusts determination conditions based on real-time monitoring of the cooling device's operation state, enabling accurate temperature abnormality detection during both operating and stopped states without requiring manual intervention or complex configuration
Solution Approach 2:
The system performs self-adjustment of determination conditions based on the cooling device's operational state. The temperature determination unit autonomously selects appropriate determination conditions without external control, making the system self-adaptive to different thermal environments while maintaining operational simplicity for the user
Data Source
AI summary
An overtemperature detecting system according to an embodiment detects a temperature abnormality of a dry-type transformer (hereinafter, referred to as a transformer) cooled by a cooling device. The overtemperature detecting system includes a temperature determining unit. The temperature determining unit determines and outputs a temperature abnormality of the transformer by changing determination conditions of the temperature abnormality of the transformer using operation states during operating and during stopping of the cooling device.