On-line PD Monitoring System for Switchgears
This system monitors partial discharge (PD) activities of switchgears (cabinets) through the HF sensors installed on the connector cables of the voltage indicators. With the application of advanced pulse-shape classification technology, the accuracy and precision of fault detection achieve 80% and above. Compared with traditional TEV and AE methods, this system has higher sensitivity, accuracy, and precision, and is more robust to interference.
Complying Standards:
• GB/T* 7354-2018 Partial discharge measurements (IEC60270:2000+AMD1:2015).
• DL/T** 1430-2015 Technical guide for on-line monitoring system of transformation equipment.
• DL/T 860-2018 Power automation communication networks and systems.
• Q/GDW*** 534-2010 Technical guide for on-line monitoring system of transformation equipment.
• *GB/T stands for “National Recommended Standards of China”.
• **DL/T stands for “Recommended standards of electric power industry of China”.
• ***Q/GDW stands for “Corporation standard of State Grid Corporation of China”.
Key Features:
• Safe operation:The installation and operation of the sensors maintain the structural integrity and the electrical characteristics of the switchgear, thus will not cause any harm on the operation safety.• Robust to interference:With the revolutionary pulse-shape classification technology, the accuracy and precision of PD detection and alarming achieve 80% and above.
• Highly reliable:System components have IP65 protection level, comparable with switchgears thus suitable for long-term use.
• Future proof:The system has future-proof configurations for hardware and OTA update ability for software.
• Fully patented:Fully patented design with full-lifecycle service.Cost performance:Getting accurate health data of the switchgear installations with low cost and less labor.
Technical Specifications:
Micro HF sensor |
Sensitivity |
≤5pC |
Frequency band |
0.15 ~ 100MHz |
|
Ingress protection |
IP65 |
|
Installation method |
Removable, semi-permeant |
|
Monitoring unit |
Sensitivity |
≤0.1pC |
Sampling rate |
250MS/s |
|
Timing synchronization error |
≤5ns |
|
Internal data storage |
≥64GB |
|
Installation method |
Rack mount, wall mount |
|
Server |
Network |
1 Gbps Ethernet, 4 ports |
Operation system |
Windows Server or Linux |
Pictures:
Micro HF sensor |
Monitoring unit |
Sensor installation |
System installation |
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