Partial Discharge Detection Using Synthesized Synchronization Signals
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Solution Overview
Problem
Existing partial discharge detection systems face challenges in achieving real-time synchronization between remotely detected AC supply electrical voltage and partial discharge signals due to time delays in signal transmission, making it difficult to synchronize the two signals effectively.
Innovation Solution
The system employs a partial discharge acquisition and processing device that uses synthesized phase data to synchronize the partial discharge signal with the AC supply voltage phase, utilizing a local clock generator and a communication network to adjust phase values and filter errors, allowing for real-time synchronization even when the detection is remote from the electrical object under test.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the AC supply electrical voltage is detected remotely from the electrical object under test, then the safety and ease of operation are improved, but the time delay in signal transmission causes synchronization precision to deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing synchronization phase values in a lookup table before they are needed. The synthesisized phase data is prepared in advance based on expected AC voltage phase, allowing the system to immediately retrieve and apply the correct phase reference without waiting for real-time signal transmission, thus compensating for transmission delays.
Solution Approach 2:
The patent creates a copy of the AC supply voltage phase information in the form of synthesized phase data. Instead of relying on the actual transmitted voltage signal, the system generates synthetic phase values that replicate the expected phase characteristics, allowing synchronization to proceed independently of the physical signal transmission timing.
2Device complexity
If the synchronization signal is transmitted through a communication network, then the device complexity is reduced, but the time delay and loss of time increase
Solution Approach 1:
The system performs preliminary calculation of synchronization phase values and stores them in a lookup table before they are needed for actual synchronization. This pre-computation approach eliminates the need for real-time signal processing and transmission, significantly reducing time delays while keeping the device architecture simple and communication-network-based.
Solution Approach 2:
The patent introduces synthesized phase data as an intermediary between the communication network and the synchronization process. Instead of directly transmitting and processing the actual AC voltage signal, the system uses pre-computed phase values as a mediator, which eliminates the time delay associated with real-time signal transmission while maintaining synchronization accuracy.
3Measurement precision
If direct connection sensors are used to detect the AC supply voltage, then the synchronization precision is improved, but the ease of operation and safety deteriorate due to disconnection requirements
Solution Approach 1:
The patent creates a synthetic copy of the AC voltage phase information that can be obtained through remote communication networks. This synthesized phase data replicates the precision needed for synchronization without requiring physical connection to the electrical component, thereby maintaining measurement precision while dramatically improving ease of operation and safety.
Solution Approach 2:
The system uses synthesized phase data as an intermediary that bridges the gap between remote communication capabilities and precise synchronization requirements. This intermediary allows the system to achieve accurate phase reference without direct electrical connection, eliminating the need for disconnection operations while maintaining synchronization precision.
Data Source
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AI summary
A partial discharge detection system (1000) comprising a partial discharge acquisition and processing device (400) including: a partial discharge detection device (401) configured to provide a detected partial discharge electrical signal (SPD1) from partial discharge pulse generated by a first electrical object (100); a first communication module (407) configured to receive a detected synchronization signal carrying detected synchronization phase values (ϕACtn) and corresponding reference time values (tn)associated with an electrical supplying voltage (VAC) of a second electrical object (103). The partial discharge detection system further includes: a phase value generator (11) configured to produce synthetized phase values (ϕSYNtn) representing a synthetized synchronization signal (Ssyn1), the phase value generator (11) being adjustable according to phase errors; an error computing module (9) configured to compute said phase errors (εti) from the synthetized phase values (ϕSYNtn), the detected synchronization phasevalues (ϕACtn) and the corresponding reference time values (tn).