EPRI Partial Discharge Monitors: RFI Monitor: Use case
The problem:
Power utilities often face the challenge of detecting and mitigating partial discharge (PD) in electrical equipment, which can lead to insulation failure and costly outages. The primary issue is to identify PD activity early enough to prevent equipment failure and ensure reliable operation. Research is focused on developing effective monitoring systems that can provide real-time data on PD activity, allowing for timely maintenance and repairs.
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Airborne PD signals
RF monitoring approach:
The EPRI RF monitors for PD were installed in various substations to continuously monitor electrical equipment. The AE monitor was placed near potential PD sources to capture acoustic emissions, while the RFI monitor was positioned to detect electromagnetic waves. Both devices transmitted data wirelessly to a central base station, where it was logged and analyzed. This setup allowed for non-intrusive, real-time monitoring of PD activity.
Lessons learnt:
From the research, it was learned that the combination of AE and RFI monitoring provides a comprehensive view of PD activity. The AE monitor was particularly effective in detecting PD in enclosed spaces, while the RFI monitor excelled in open areas. The wireless data transmission proved reliable, reducing the need for extensive cabling and making the system easier to deploy and maintain. Additionally, early detection of PD allowed for proactive maintenance, significantly reducing the risk of equipment failure.
Status:
Current research and projects involving EPRI’s RF monitors for PD are focused on enhancing the sensitivity and accuracy of the devices. Ongoing studies aim to refine the algorithms used for data analysis and improve the robustness of wireless communication. The latest status indicates that these monitors are being increasingly adopted by utilities worldwide, contributing to more reliable and efficient power systems.