Transformer Mapping via Power Line Carrier Signaling
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Solution Overview
Problem
The topology of wireless mesh networks in Advanced Metering Infrastructure (AMI) does not correspond to the power distribution network, making it difficult to dynamically discover and monitor conditions at intermediate points like substations and transformers, which are crucial for intelligent power management.
Innovation Solution
A communication node is placed at each transformer and distribution equipment to use one-way signaling over power lines to associate downstream nodes, enabling the mapping of the power distribution network topology with the wireless mesh network, allowing for the identification and registration of transformers and other equipment with the back office system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless mesh network is used for AMI communication, then communication flexibility and coverage are improved, but the ability to dynamically discover and monitor intermediate power distribution equipment is lost
Solution Approach 1:
The patent introduces power line carrier signaling as an intermediary mechanism that bridges the wireless mesh network and the power distribution network. The transformer mapping device uses power line communications to send downstream node identifiers upstream, creating a feedback loop that enables the back office system to correlate wireless network topology with physical power distribution topology without requiring direct wireless communication between all nodes
Solution Approach 2:
The system implements a feedback mechanism where the transformer mapping device receives downstream node identifiers via power line carrier signaling and transmits this information upstream to the back office system. This feedback loop enables dynamic discovery and continuous updating of the topology correspondence between the wireless mesh network and the power distribution network
2Device complexity
If communication nodes are only placed at customer premises, then network simplicity is maintained, but monitoring capability at intermediate points like transformers is lost
Solution Approach 1:
The transformer mapping device acts as an intermediary component that is strategically placed at intermediate power distribution points such as transformers. This device enables monitoring capability at critical locations without requiring a full mesh of communication nodes throughout the entire distribution network, thus maintaining relative simplicity while significantly improving reliability
Solution Approach 2:
The patent segments the monitoring function by placing specialized transformer mapping devices only at critical intermediate points where monitoring is most needed, rather than deploying communication nodes uniformly across all locations. This selective segmentation optimizes resource allocation and maintains system simplicity while achieving reliable monitoring at key infrastructure points
3Productivity
If power line carrier signaling is used for transformer mapping, then topology discovery capability is improved, but RF communication asymmetry and interference may occur
Solution Approach 1:
The patent uses power line carrier signaling as an intermediary communication channel that is already present in the power distribution infrastructure. This approach enables topology discovery without requiring additional RF communication infrastructure, thereby avoiding the introduction of new sources of RF interference while still achieving improved productivity in topology mapping
Solution Approach 2:
The power line infrastructure is utilized for dual purposes: both power delivery and communication signaling. By making the power lines multi-functional, the system achieves topology discovery capability without adding separate communication infrastructure that would contribute to RF interference, thus resolving the contradiction between productivity improvement and harmful factor introduction
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
This solution allows for the generation of a map that enables monitoring and management of the power distribution network, enabling alerts and load reduction commands to be sent to customers' devices, thereby preventing transformer failures and optimizing power distribution.
Implementation Method 1
using one-way signaling over the power lines themselves, to associate each item of distribution equipment with the downstream nodes that it services
Implementation Method 2
A signaling technique is then employed, using one-way signaling over the power lines themselves
Data Source
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AI summary
Techniques are disclosed by which RF mesh networks can identify utility distribution topologies by using power line communication combined with wireless networking to identify the mapping of transformers and other distribution equipment at a back office system server. At a specified time, an item of distribution equipment signals a unique identifier by introducing a phase shift in the electric power being delivered by that equipment. A meter node detects and decodes these temporal shifts to obtain an identifier of equipment supplying the power to it. Upon ascertaining this identification, the meter node sends an acknowledgment to thereby register with that equipment. The association of the particular customer's premises with the equipment is also sent to a back office system, to enable a map of the correspondence between meter and the equipment to be generated.