Transformer Core Optical Fiber Sensing for Distributed Fault Detection
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Solution Overview
Problem
Detecting faults within transformers is challenging due to limited detection range of point sensors and the harsh internal environment, which can lead to rapid and unpredictable failures, including explosions.
Innovation Solution
Incorporating a sensing system with optical fibers embedded within the transformer's core, utilizing Brillouin Optical Time-Domain Analysis (BOTDA) to detect temperature and strain changes, and distributing sensing components equidistantly within the laminated layers for comprehensive monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If point sensors are used to detect operating conditions, then detection precision at specific locations is improved, but detection range is limited and device complexity increases
Solution Approach 1:
The core is segmented into multiple laminated layers with sensing components distributed at different positions within the stack. This segmentation allows the sensing system to cover a broader detection range while maintaining precision at each specific location through distributed sensing points.
Solution Approach 2:
The sensing approach transitions from point-based detection to distributed detection across multiple dimensions within the core structure. By embedding sensing components in laminated layers at different positions, the system adds spatial dimensionality to the detection capability, expanding coverage area while maintaining measurement precision.
2Loss of information
If multiple point sensors are installed throughout the system, then comprehensive data coverage is improved, but device complexity and installation difficulty increase
Solution Approach 1:
Multiple sensing functions are merged into an integrated laminated layer structure. The sensing components are combined with the core's laminated layers, creating a unified structure that provides comprehensive data coverage while reducing the complexity of separate sensor installations throughout the system.
Solution Approach 2:
The laminated layers serve multiple functions: structural support for the core and integrated sensing capability. This multi-functionality reduces device complexity by eliminating the need for separate sensing systems, as the same structural components also perform detection functions across the entire core area.
3Reliability
If sensing components are embedded within the core, then detection range and fault detection capability are improved, but manufacturing precision requirements increase
Solution Approach 1:
Sensing components are preliminarily positioned within spacer layers before the final assembly of laminated layers. This preliminary action allows for precise positioning to be established during the layer stacking process, reducing the need for high-precision embedding operations after core assembly and improving overall manufacturing feasibility.
Solution Approach 2:
Spacer layers serve as intermediary structures that facilitate the embedding of sensing components. These spacer layers provide a predefined framework and positioning mechanism, acting as a mediator between the sensing components and the final core structure, thereby reducing the precision requirements for direct embedding into the dense laminated assembly.
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
Enhances fault detection accuracy and timeliness by increasing the detection range and resilience to harsh environments, preventing significant failures and explosions.
Implementation Method 1
utilizing Brillouin Optical Time-Domain_analysis (BOTDA) to detect temperature and strain changes
Data Source
AI summary
Sensing methods and systems for transformers, and the construction thereof, are described herein. Example transformer systems and example methods for constructing a core for the system are disclosed. The example system includes a core with a bottom plate, two or more limbs mounted to the bottom plate and a top plate enclosing the core. At least one of the bottom plate, the limbs and the top plate is formed with a sensing component therein. The sensing component can be mounted to a spacer layer assembled within a stack of laminated layers. The sensing component can be mounted within a path defined within the spacer layer, for example. Methods for detecting operating conditions within the transformer are also disclosed.