Project Background
As the demand for power reliability continues to grow, ensuring the safe operation of high-voltage switchgear has become a top priority in modern substations. Partial discharge (PD) is a critical early-warning signal of insulation degradation, which, if undetected, may lead to insulation breakdown, equipment failure, or even large-scale outages. To enhance equipment reliability, a 220kV substation in Jiangxi, China implemented the Partial Discharge (PD) Online Monitoring System developed by Zhuhai Huawang Technology.
Solution Provided by Zhuhai Huawang Technology
The solution was tailored to the substation’s operational needs, featuring a combination of advanced monitoring devices and intelligent sensors:
- Switchgear PD Monitoring Unit – A fusion device integrating multiple PD detection channels (TEV, ultrasonic, UHF), enabling comprehensive and accurate data acquisition.
- 3-in-1 Partial Discharge Sensor – Combining TEV, ultrasonic, and temperature detection into a compact sensor, reducing installation complexity while improving monitoring precision.
- UHF Partial Discharge Sensor – Installed in the substation space to capture electromagnetic signals of PD with high sensitivity.
- Data Integration and Alarm System – Real-time data uploaded to the station’s monitoring platform, with built-in threshold alarms and trend analysis to support predictive maintenance.
Results & Benefits
- Enhanced Reliability: The system provided continuous monitoring of switchgear insulation conditions, reducing reliance on manual inspections.
- Early Fault Detection: Potential insulation defects were identified in their early stages, preventing costly unplanned outages.
- Smart Maintenance: Long-term data collection supported condition-based maintenance, optimizing asset management strategies.
- Digital Transformation: The project marked a step forward in smart substation development, aligning with the goals of intelligent grid modernization.
