UHF Partial Discharge Location Measuring Device

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Solution Overview

Problem

Existing methods for measuring partial discharges in high-voltage power devices are cumbersome, prone to errors due to unknown propagation velocities and external noise, and require manual calculations, making it difficult for technicians to accurately locate discharges in real-time.

Innovation Solution

A UHF partial discharge and location measuring device that uses multiple sensors to detect and process signals, includes noise reduction capabilities, and performs statistical analysis to determine the location of discharges with high accuracy, displaying results in real-time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If multiple sensors are attached to detect partial discharge signals, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improvepartial discharge location measurement precisionVSAvoidsensor arrangement and manual measurement complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The system automatically calculates arrival times and determines discharge locations using built-in processing units, eliminating the need for manual sensor repositioning and calculation by the measurer. The device serves itself by performing complex analysis functions that would otherwise require human intervention.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical sensor adjustment and hand calculation methods with automated electronic signal processing. The processing unit automatically computes arrival times and discharge locations based on sensor data, substituting mechanical/manual operations with electronic automation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If manual calculation methods are used for arrival time analysis, then ease of operation is improved, but productivity decreases

Engineering Contradiction:

Improveease of partial discharge analysisVSAvoidreal-time discharge location determination speed

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The processing unit automatically performs arrival time calculations and discharge location determination without requiring measurer intervention. The system processes sensor data autonomously, providing real-time results without manual computation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Manual calculation methods are replaced with automated electronic processing. The processing unit uses electronic circuits and algorithms to compute arrival times and discharge locations instantly, substituting human calculation with automated electronic systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If external noise sensors are added to reduce noise interference, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improvesignal detection precision in noisy environmentVSAvoidsensor system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

External noise sensors act as intermediaries to detect and characterize environmental noise. The processing unit uses this noise information to filter and identify genuine discharge signals from background noise, enabling accurate measurement despite the added sensor complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system creates a copy of the noise environment through external noise sensors that replicate noise characteristics. This allows the processing unit to distinguish between noise patterns and actual discharge signals by comparing and filtering the copied noise data.

Inventive Principle:

Principle #26Copying

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 precise and efficient analysis of partial discharge locations within high-voltage devices, reducing external noise interference and manual calculation burdens, allowing for effective monitoring and fault detection in power equipment.

Implementation Method 1

receives signals detected by UHF sensors when a partial discharge occurs

Methodology Applied

Scientific EffectElectromagnetic radiation detection: Electromagnetic Induction

Implementation Method 2

reduce corona noises often generated in a substation equipped with transformers and any other various kinds of external noises

Methodology Applied

Scientific EffectSignal filtering: Filter (electronic)

Data Source

PatentUS8008926B2UHF partial discharge and location measuring device for high-voltage power devices

Publication Date: 2011.08.30 KOREA ELECTRIC POWER CORP

AI summary

Disclosed is a UHF partial discharge and its location measuring device for high-voltage power devices. The measuring device includes a partial discharge sensor, an external noise sensor, an analogue-digital converter, a peak detector, a partial discharge signal processor, an arrival time detector, a discharge location processor, and a display unit.