GIS Partial Discharge Synchronization Using AC Reference Switching
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Solution Overview
Problem
Existing systems face challenges in synchronizing partial discharge detections in Gas Insulated Stations (GIS) due to the complexity of generating power and acquisition signals, incompatibility of sensor characteristics, and the need for simplified synchronization across multiple locations.
Innovation Solution
A device comprising an AC reference switch and an AC inverter generates a synchronized power and signal using a plurality of inputs, prioritizing a test signal, and distributes it to partial discharge acquisition units, ensuring compatibility and safety across different configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple measuring devices are used to detect HV signals at different locations, then the coverage and reliability of partial discharge detection is improved, but the complexity of signal synchronization and compatibility between devices increases
Solution Approach 1:
The patent combines multiple measuring device inputs into a single AC reference switch device that selects and outputs one synchronized signal. This merging approach maintains the reliability benefits of multiple measurement points while eliminating the complexity of managing multiple independent synchronization systems.
Solution Approach 2:
The AC reference switch device serves multiple functions: it accepts inputs from multiple measuring devices, performs signal selection based on presence detection, and provides a single synchronized output to the AC inverter. This multi-functionality reduces the need for separate synchronization systems for each measuring device.
2Adaptability or versatility
If separate power signal and acquisition signal generation systems are used, then the functionality and flexibility of the detection system is improved, but the number of connections and system complexity increases
Solution Approach 1:
The AC inverter combines the generation of power signals and acquisition signals into a single device. This single device receives the synchronized reference signal and generates both required signal types, thereby maintaining system flexibility while significantly reducing the number of connections compared to separate generation systems.
3Measurement precision
If sensor characteristics are optimized for specific locations, then the detection accuracy at those locations is improved, but the compatibility and interoperability across different locations deteriorates
Solution Approach 1:
The AC reference switch device creates an equipotential reference by selecting and providing a single synchronized signal to all AC inverter units across different locations. This ensures that all sensors, regardless of their optimized local characteristics, operate from a common reference potential, ensuring signal compatibility and interoperability across the entire system.
Data Source
AI summary
A device for providing a synchronisation signal to identify partial discharges in a Gas Insulated Station (GIS). The device including an AC reference switch device having a number of inputs for inputting a number of synchronisation signals from a number of sensors, the switch device including means for selecting an input among the inputs based on the presence of a synchronisation signal and an AC inverter to provide a power and synchronisation signal, based on the synchronisation signal provided by the AC reference switch device.