Transformer Area Topology Mapping Using Load Jump Matching

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Solution Overview

Problem

Existing methods for transformer area identification and constructing transformer area line topology in power grids suffer from poor accuracy due to incorrect power supply line connections during installation, leading to incorrect identification and topology construction.

Innovation Solution

A method involving data acquisition from sub-meters and a master meter to generate steady-state and transient load curves, with feature matching techniques to accurately identify load jumps and construct transformer area line topology by determining the mounting relationship of electric meters and measuring total loads on branch terminals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If transformer area identification is performed based on power supply line connection during power grid installation, then the identification method is simple, but the identification accuracy deteriorates due to incorrect connection

Engineering Contradiction:

Improveidentification method simplicityVSAvoidtransformer area identification accuracy

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent replaces the mechanical/connection-based identification method (relying on physical power supply line connections) with an electrical signal-based method. By injecting test signals and measuring current responses, the system identifies transformer areas through electrical characteristics rather than physical connection tracing, thereby eliminating errors from incorrect installation connections.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces test signal injection devices and measurement instruments as intermediaries between the power supply lines and the identification process. These intermediaries enable accurate detection of electrical characteristics and current responses, serving as a bridge to overcome the limitations of direct connection-based identification.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If transformer area line topology is constructed based on connection during power grid installation, then the construction process is simple, but the topology accuracy deteriorates

Engineering Contradiction:

Improvetopology construction speedVSAvoidtransformer area line topology accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent replaces manual connection-based topology construction with automated electrical measurement-based construction. By using test signal injection and current response measurement, the system automatically determines topology relationships, achieving both speed and accuracy without relying on installation records.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent implements a feedback mechanism where test signals are injected into the power system, current responses are measured and fed back to the analysis system, and topology is constructed based on this feedback information. This closed-loop approach ensures accurate topology construction by continuously verifying electrical characteristics against the modeled topology.

Inventive Principle:

Principle #23Feedback

3Device complexity

If traditional identification methods are used, then no additional equipment is needed, but identification accuracy deteriorates due to line loss power

Engineering Contradiction:

Improveequipment requirementVSAvoididentification accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent introduces test signal injection devices and precise measurement instruments as intermediaries to overcome the limitation of line loss power. These devices enable accurate measurement of electrical characteristics by compensating for and separating line loss effects from the actual transformer area characteristics, thereby improving accuracy despite the presence of line losses.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11774472B2Transformer area identification method and method for constructing transformer area line topology

Publication Date: 2023.10.03 BEIJING TENGINEER AIOT TECH CO LTD

AI summary

A transformer area identification method includes: performing data acquisition on all sub-meters and a master meter in an identification domain to obtain a steady-state load, and generating a steady-state load jump curve; and performing load jump feature matching between steady-state load jump curves of all the sub-meters and a steady-state load jump curve of the master meter, and obtaining attribution of the sub-meters with a load jump according to matching results. A method for constructing transformer area line topology is further provided. A load jump identification technique is utilized to acquire a load value of each node in a transformer area power supply network, so as to form a load jump curve for each node. By performing load jump feature matching between load jump curves of all sub-meters and a load jump curve of a master meter, a mounting relationship of a corresponding electric meter is determined.