Surge Arrester Temperature Monitoring via Nested Sensor Assembly
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Solution Overview
Problem
High voltage power distribution systems face disruptions and costly failures due to undetected deterioration of surge arresters, which can lead to short circuits and significant service disruptions, especially in substation arresters, highlighting the need for effective temperature monitoring to prevent failures.
Innovation Solution
Integration of sensor assemblies within surge arresters and bushings that monitor temperature using conductive plates, heat absorption members, and temperature sensors, allowing for real-time data transmission to monitoring systems without affecting the arrester's performance, enabling proactive replacement before failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature monitoring is implemented in surge arresters, then reliability of power distribution system is improved, but device complexity increases
Solution Approach 1:
The temperature sensor assembly is nested within the existing arrester structure, specifically positioned between the metal oxide blocks. This nested configuration allows temperature monitoring functionality to be integrated into the arrester without adding external components or significantly increasing device complexity, while still achieving the reliability improvement through continuous temperature monitoring
Solution Approach 2:
The sensor assembly serves multiple functions: it monitors temperature, detects deterioration conditions, and provides early warning of potential failures. This multi-functionality approach allows a single integrated component to address multiple monitoring needs, improving reliability without proportionally increasing device complexity
2Measurement precision
If sensor assemblies are integrated within surge arresters, then early detection of deterioration is enabled, but manufacturing complexity increases
Solution Approach 1:
The monitoring system is segmented into modular sensor assemblies that can be independently manufactured and then integrated into the arrester. This segmentation allows for specialized manufacturing of the sensor component using standard temperature sensing technologies, while the overall arrester manufacturing process remains relatively unchanged, thus enabling early detection without significantly increasing manufacturing complexity
Solution Approach 2:
The sensor assembly acts as an intermediary element that bridges the metal oxide blocks and the external monitoring system. This intermediary component enables precise temperature measurement and deterioration detection while maintaining a clear separation between the high-voltage arrester functionality and the low-voltage sensing functionality, simplifying both manufacturing and integration
3Reliability
If real-time temperature monitoring is implemented, then prevention of failures is achieved, but cost of the system increases
Solution Approach 1:
The sensor assembly enables preliminary detection of temperature rise and deterioration conditions before they lead to actual failure. By detecting early signs of problems such as moisture ingress or block degradation, the system allows for planned maintenance and replacement, preventing catastrophic failures and reducing overall system costs despite the added sensor component
Solution Approach 2:
The monitoring system provides continuous feedback on the thermal and operational state of the arrester. This feedback mechanism enables real-time assessment of arrester health, allowing operators to respond to deteriorating conditions before they result in failure, thereby achieving failure prevention through informed decision-making rather than through overly complex or expensive systems
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
The solution enables early detection of arrester deterioration, preventing failures and associated disruptions by allowing for timely replacement, thereby enhancing the reliability and reducing maintenance costs of high voltage power distribution systems.
Implementation Method 1
a heat absorption member positioned between the conductive plates
Data Source
Figure 1~2
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AI summary
The present disclosure provides surge arrester units having one or a plurality of sensor assemblies within the surge arrester unit. The sensor assemblies include a first plate, a second plate, a heat absorption member positioned between the first and second plates, and a temperature assembly that senses the temperature of the heat absorption member and transmits the temperature.