Outlet-Based Discharge Detection for Accurate Branch Fault Sensing
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Solution Overview
Problem
Existing discharge detection systems face challenges in accurately detecting discharge occurrences due to noise attenuation with distance and require extensive installation efforts, leading to erroneous detections and increased complexity in distribution board housing.
Innovation Solution
A discharge detection system comprising a master unit and slave units, where the master unit is connected to the main and branch breakers, and slave units are connected to electrical outlets, allowing for accurate detection and reporting of discharge events without enlarging the distribution board housing, using noise detection sections and determination sections to differentiate between discharge and non-discharge noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the amplification factor of the amplifier is increased or the threshold is reduced to detect low-level noise from distant discharge, then discharge detection capability is improved, but false detection of non-discharge noises increases
Solution Approach 1:
The system dynamically adjusts the amplification factor based on the detected noise level. When noise from distant discharge is detected, the amplification factor is automatically increased to enhance detection sensitivity. When no discharge is present, the amplification factor returns to normal, preventing false detections from non-discharge noises.
Solution Approach 2:
The system changes the amplification factor parameter dynamically according to the discharge detection needs. By adjusting this parameter based on real-time noise characteristics, the system optimizes both detection sensitivity and false detection prevention without requiring permanent threshold reduction.
2Loss of information
If multiple noise detection sections are installed on the secondary side of each branch breaker to specify discharge locations, then discharge location specification capability is improved, but installation complexity and housing space requirements increase
Solution Approach 1:
The system uses the existing electrical outlet as an intermediary device to host the noise detection section. Instead of directly installing detection sections in the distribution board, the outlet serves as a mediator that connects the detection functionality to the electrical wiring, simplifying installation while maintaining location specification capability.
Solution Approach 2:
The system moves the noise detection function from the traditional two-dimensional plane of the distribution board interior to a third-dimensional extension at the electrical outlet. This spatial relocation allows multiple detection points without increasing the footprint or complexity within the distribution board housing.
3Measurement precision
If multiple noise detection sections are installed to cover all branch breakers, then discharge detection coverage is improved, but the housing of the distribution board must be enlarged
Solution Approach 1:
The system extracts the noise detection function from the distribution board housing and relocates it to the electrical outlets. This separation allows comprehensive discharge detection coverage across all branch breakers without requiring additional space within the distribution board, as the detection components are now distributed at the outlet locations.
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
The system enables thorough and accurate detection of discharge events across the entire building without reducing accuracy and allows for easy installation of multiple slave units, reducing the need for increased housing space in distribution boards.
Implementation Method 1
a master unit and a slave unit, each provided with a noise detection section for detecting noise superimposed on voltage or current
Data Source
AI summary
Provided is a discharge detection system which includes a master unit and a slave unit. The master unit and the slave unit are provided with a noise detection section for detecting the noise superimposed on a voltage or current and a determination section for determining whether discharge has occurred based on an output of the noise detection section. The master unit is electrically connected to a secondary side of a main breaker and primary sides of a plurality of branch breakers, the main breaker and the branch breakers configuring a distribution board, and the slave unit is electrically connected to an electrical outlet installed in the building. If determining that discharge has occurred, the master unit outputs a first signal and the first signal is input to at least one of the main breaker and the branch breakers, and if determining that discharge has occurred, the slave unit outputs a second signal and the second signal is input to at least one of the master unit, the main breaker, and the branch breakers.