CT Sensor Wireless Transmission for Power Line Abnormality Detection

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Solution Overview

Problem

Conventional power distribution network monitoring relies on periodic patrols, which are time-consuming and costly, and fail to detect sudden abnormalities between regular checks.

Innovation Solution

A power distribution network monitoring system with measuring instruments and management devices that perform wireless data transmission for real-time abnormality detection, allowing for continuous monitoring without the need for frequent manual patrols.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If periodic patrols by workers are used for monitoring, then measurement can be performed at predetermined positions, but the measurement takes a long time and costs a considerable amount

Engineering Contradiction:

Improveabnormality detection capabilityVSAvoidmeasurement time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The measuring instrument autonomously performs electrical measurements and wirelessly transmits data without requiring worker intervention. The instrument serves itself by automatically detecting abnormalities and communicating results to the management device, eliminating the need for periodic manual patrols while maintaining measurement precision.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The manual mechanical patrol system is replaced with an automated electronic measurement system. The measuring instrument uses electrical components to perform measurements and wireless communication technology to transmit data, substituting the mechanical process of workers physically visiting measurement sites with an automated electronic system that operates continuously.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If periodic patrols by workers are used for monitoring, then electrical measurement can be performed, but abnormalities cannot be detected during the period in between regular patrols

Engineering Contradiction:

Improveabnormality detection capabilityVSAvoidcontinuous monitoring capability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The measuring instrument operates continuously without interruption, performing electrical measurements at all times rather than only during periodic patrols. This continuous operation ensures that abnormalities are detected immediately when they occur, eliminating detection gaps between regular patrol intervals and providing reliable continuous monitoring.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The monitoring system transitions from a static periodic patrol schedule to a dynamic continuous monitoring mode. The measuring instrument adapts by continuously measuring and transmitting data, allowing the system to respond dynamically to changing conditions and detect abnormalities at any time rather than only at predetermined intervals.

Inventive Principle:

Principle #15Dynamics

3Measurement precision

If workers perform manual patrols, then direct measurement can be performed, but a number of workers must visit measurement sites which increases cost

Engineering Contradiction:

Improveelectrical measurement accuracyVSAvoidoperational cost

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The measuring instrument autonomously performs measurements and transmits data without requiring worker intervention. This self-service capability eliminates the need for multiple workers to visit measurement sites, significantly reducing operational costs while maintaining measurement accuracy through automated electronic detection and wireless communication.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The measuring instrument acts as an intermediary between the power distribution network and the management device. It performs electrical measurements and wirelessly transmits data, serving as an automated mediator that replaces the need for human workers to physically connect measurement devices and manually collect data, thereby reducing operational costs.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Enables quick and cost-effective detection of abnormalities in the power distribution network, reducing operational costs and improving response times to sudden issues.

Implementation Method 1

The transmitter wirelessly transmits, as transmission data, detection data that is at least part of the data measured by the measurement components

Methodology Applied

Scientific EffectWireless transmission: Electromagnetic Induction

Data Source

PatentUS11156641B2Power distribution network monitoring system for detecting abnormalities

Publication Date: 2021.10.26 OMRON CORP

AI summary

A power distribution network monitoring system includes a CT sensor and a power management device. The CT sensor includes a measurement component and a transmitter. The measurement component is installed at a plurality of predetermined positions along a power line constituting the power distribution network, and measures current of the power line at each predetermined position. The transmitter wirelessly transmits, as transmission data, the power spectrums of the fundamental wave, third harmonic, and fifth harmonic, as well as the effective current values used to detect abnormalities in the power distribution network, the data being at least part of the data measured by the measurement components. The power management device includes a receiver and a management database. The receiver receives the transmission data. The management database stores the received data.