Distribution Grid Topology Graphs for Real-Time Outage Control
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Solution Overview
Problem
Existing topology processors for electrical distribution systems, particularly for low voltage networks, struggle with accurate modeling and real-time control due to their smaller size and complexity, leading to inefficiencies in managing outages and compliance with regulatory penalties.
Innovation Solution
A graph structure is generated for electrical distribution systems, incorporating physical topology and component events with timestamps, allowing for precise control and analysis of network changes, including energization states and post-mortem evaluations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional topology processors are used for low voltage networks, then the system can handle medium voltage networks effectively, but the modeling accuracy and performance deteriorate due to the larger size and complexity of low voltage networks
Solution Approach 1:
The patent segments the electrical distribution system into multiple islands based on switch positions and connectivity. Each island is represented as a separate component in the graph structure, allowing the topology processor to handle large low voltage networks by dividing them into manageable segments rather than processing the entire network as a single complex entity
Solution Approach 2:
The patent introduces a temporal dimension by storing events with timestamps, transforming the static topology representation into a dynamic time-series graph structure. This allows the system to track topology changes over time and improve modeling accuracy by considering the historical sequence of events in addition to the current network state
2Productivity
If real-time topology processing is implemented for large low voltage networks, then outage management can be improved, but the processing time and computational load increase
Solution Approach 1:
The patent pre-establishes the graph structure with all possible components (islands, switch bays, connections) and their relationships before actual topology changes occur. When events happen, the system only needs to update the existing structure by adding or removing edges based on switch positions, rather than rebuilding the entire topology model, significantly reducing processing time
Solution Approach 2:
The patent creates a simplified graph representation (topological graph) that copies only the essential connectivity information from the physical network. This abstracted model with islands, switch bays, and connections as nodes and edges enables faster processing by eliminating unnecessary detailed information while preserving the topological relationships needed for outage management
3Measurement precision
If detailed graph structure with timestamps is generated, then real-time control and analysis accuracy improve, but the data storage and processing requirements increase
Solution Approach 1:
The patent extracts only the essential topological information (connectivity relationships between islands and switch bays) from the complete network data, storing it in a simplified graph structure. By taking out only the relevant topological features and event timestamps needed for analysis, the system achieves high measurement precision without storing unnecessary data, thus reducing overall data volume requirements
Data Source
Figure 1~2
AI summary
According to the present invention, an operation method for electrical distribution systems is provided. Said operation method comprises the steps of, generating a graph structure for electrical distribution system, and using generated graph structure for controlling the electrical distribution system, wherein step of generating a graph structure for electrical distribution system comprises generating a physical topology showing the islands (I) and switch bays (B) of the electrical distribution system as well as topology connections between said islands (I) and switch bays (B), wherein said islands (I) comprise plurality of first components (1) and said switch bays (B) comprise plurality of second components (2); storing the events of components of said islands (I) and switch bays (B) as timestamps.