Power Line Carrier Localization for LV Network Meters
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Solution Overview
Problem
The complexity of low voltage (LV) networks, with buried cables of varying ages and disparate modifications, makes it difficult to accurately link cables from the MV/LV substation to consumer points, leading to poor network quality estimation, prolonged troubleshooting, and challenges in locating energy theft.
Innovation Solution
A method using Power Line Carrier (PLC) telecommunications to measure and compare power levels of messages received on separate cable outlets, determining the supply cable by selecting the maximum power level, allowing for accurate identification of consumer points and LV network typology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Power Line Carrier (PLC) telecommunications are used to measure power levels of messages received on separate cable outlets, then the precision of locating consumer points is improved, but the complexity of the measurement system increases
Solution Approach 1:
The system uses the existing PLC communication infrastructure and power lines to perform both power transmission and measurement functions. The measurement modules utilize the same PLC messages already being transmitted on the power lines, eliminating the need for separate measurement systems and reducing overall complexity while maintaining high precision.
Solution Approach 2:
The power lines serve multiple functions: they transmit electrical power to consumer points and simultaneously carry PLC communication signals that are measured to locate consumer points. This multi-functionality reduces the need for dedicated measurement infrastructure, resolving the contradiction between precision and complexity.
2Ease of operation
If the actual constitution of LV networks is unknown due to untraced modifications and extensions, then the ease of operation is reduced, but the loss of information about network structure increases
Solution Approach 1:
The system continuously measures power levels of PLC messages received at cable outlets and feeds this information back to identify consumer points and map network structure. This automated feedback mechanism progressively builds and updates the network constitution database, recovering information about modifications and extensions without manual tracing.
Solution Approach 2:
The system proactively measures and records the constitution of LV networks before troubleshooting or maintenance operations are needed. By continuously building the network map in advance, the system ensures that information about network structure is available when needed, preventing loss of information and improving ease of operation.
3Productivity
If traditional methods are used without PLC measurement, then the device complexity is reduced, but the productivity of locating consumer points and detecting energy theft decreases
Solution Approach 1:
The system replaces manual physical tracing and localization methods with automated PLC-based electronic measurement. By substituting mechanical field operations with electronic signal measurement and automated data processing, the system dramatically increases productivity while the added electronic complexity is offset by the elimination of manual labor.
Solution Approach 2:
PLC messages serve as intermediaries that carry identification information from consumer points to measurement modules. This intermediary mechanism enables automated localization without direct physical access to consumer points, increasing productivity while managing system complexity through standardized communication protocols.
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 method enables precise location of subscriber meters on LV outgoing phases, improving maintenance, network quality estimation, and energy theft detection.
Implementation Method 1
at least one measurement module being adapted to receive, at the start of each cable, PLC messages via second telecommunications means PLC type and for measuring a power level of said received messages
Data Source
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AI summary
The method involves providing a set of cables (20 b1-20bN), where each of the set of cables is arranged with a central node (D1) that is utilized for supplying current to respective load points (10 b1-10 b4). A measurement module (21b) is arranged on each of the set of cables. A communication power line message is associated with an identifier, and a set of power levels is compared. A level of maximum capacity is selected based on the compared power levels. The power levels are selected for an unloaded power cable. Independent claims are also included for the following: (1) a measurement module (2) a collection device (3) an electric current distribution system.