Substation Asset Reliability Modeling for Maintenance Planning
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Solution Overview
Problem
Accurately identifying the operational states of substation elements is challenging, making it difficult to determine optimal asset management strategies such as replacement cycles and maintenance plans.
Innovation Solution
An asset management method that calculates a unique reliability model for each substation element by comparing health indices with a reference reliability model, assessing maintenance scenarios, and updating the model based on maintenance outcomes, using health indices, system reliability indices, and economic feasibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reference reliability model is used for all substation elements, then the asset management process is simple and fast, but the accuracy of reliability assessment and maintenance planning is insufficient
Solution Approach 1:
The patent segments the generic reference reliability model into element-specific reliability models by dividing substation elements into different types (transformers, circuit breakers, etc.). Each element type receives a tailored reliability model based on its specific failure characteristics, operational conditions, and maintenance history, thereby improving assessment accuracy without requiring a completely new system for each element.
Solution Approach 2:
The patent applies local quality by customizing reliability model parameters for each substation element type according to its specific operational context. Different element types receive different model configurations, failure rate parameters, and maintenance strategies tailored to their local characteristics, rather than applying a uniform model across all elements.
2Reliability
If element-specific reliability models are derived for each substation element, then the maintenance planning accuracy is improved, but the time and resources required for model development increase
Solution Approach 1:
The patent performs preliminary action by pre-establishing a comprehensive reference reliability model that contains baseline parameters, failure modes, and maintenance strategies for all substation element types. This pre-prepared framework can be quickly adapted to specific elements by adjusting parameters rather than developing models from scratch, significantly reducing model development time while maintaining element-specific accuracy.
Solution Approach 2:
The patent utilizes parameter changes to transform the generic reference model into element-specific models by modifying key parameters such as failure rates, maintenance intervals, and reliability thresholds according to each element type's characteristics. This approach allows rapid customization without restructuring the entire model framework.
3Productivity
If real-time monitoring data is continuously integrated into reliability models, then the asset management decisions are more accurate and up-to-date, but the computational load and system complexity increase
Solution Approach 1:
The patent implements feedback mechanisms where real-time monitoring data from substation elements is continuously fed back into the reliability models. This feedback loop updates the actual condition of elements, compares it with predicted reliability, and triggers maintenance alerts when thresholds are exceeded, enabling dynamic and accurate asset management decisions based on current operational status.
Data Source
AI summary
An asset management method for a substation in accordance with the present invention generates a unique reliability model for each element of the substation by comparing reliability of a reference reliability model for each substation type with a health index of the each element thereof generated based on state data and real-time monitoring data of the each element of the substation and compensating the reference reliability model for the each element of the substation; assessing system reliability index and economic feasibility for each maintenance scenario based on a reference system reliability model for each candidate element subject to maintenance among the elements of the substation; selecting a maintenance scenario as a result of the health index and the unique reliability model for the each element of the substation, the system reliability index, and the economic feasibility and updating the unique reliability model for the each element of the substation by executing maintenance.