Partial discharge

3. The consequences of partial discharges on electrical equipment

Partial discharges, although localized, have a major impact on electrical equipment. The main consequences include:

• Thermal and chemical deterioration of insulation: Discharges generate localized heat points, causing thermal degradation of insulation materials. This degradation, combined with chemical reactions, gradually weakens the insulation, making the equipment vulnerable to failure.
• Reduced equipment lifespan: The cumulative effect of partial discharges leads to progressive degradation, thus reducing the lifespan of electrical equipment.
• Risk of short circuit or fire: An undetected partial discharge can develop into a total short circuit, or even cause a fire in sensitive installations.
• Loss of performance and risk of breakdown: Discharges create disruptions in the normal operation of electrical equipment, reducing its efficiency and reliability.

4. How to detect partial discharges?

Partial discharge detection is a key aspect of managing the reliability of electrical systems. Several technologies can be used to measure and locate these discharges:

• Acoustic analysis (ultrasound): Partial discharges generate specific high-frequency ultrasonic waves. The use of ultrasonic sensors makes it possible to locate these discharges and assess their severity.
• Measurement of electromagnetic emissions: Partial discharges emit electromagnetic pulses that can be detected using specialized high-frequency sensors. These measurements allow for precise location of discharge points.
• Dissolved Gas Analysis (DGA): Detecting dissolved gases in transformers can help identify the effects of partial discharge. Gases such as hydrogen and methane are generated by the degradation of the insulation.
• Measurement of partial leakage currents: Some equipment can measure leakage currents associated with a partial discharge, providing a direct indicator of insulation failure.

5. Solutions to limit or eliminate partial discharges

Monitoring and analysis solutions with OMICRON equipment

OMICRON's solutions for partial discharge detection and analysis are among the most advanced in the field of high-voltage electrical equipment testing. These devices enable accurate assessment and proactive management of partial discharge risks.

1. Partial discharge test with the PD Analyzer system (OMICRON)

OMICRON's PD Analyzer is a comprehensive, mobile solution for measuring and analyzing partial discharges in electrical systems. It detects, locates, and analyzes partial discharges in transformers, cables, and other electrical equipment. Its approach allows for real-time measurement of discharge emissions and in-depth analysis of received signals, enabling the severity of discharges to be determined and their potential impact on equipment to be estimated.

2. Polarization test and leakage current measurement with the CPC 100 (OMICRON)

The CPC 100 is another OMICRON device that can measure partial leakage currents and perform polarization tests on insulation. Its high-precision testing capabilities allow insulation quality to be determined by measuring its ability to withstand discharges. This test is essential for predictive maintenance of electrical equipment.

3. Use of the continuous partial discharge monitoring system (OMICRON)

OMICRON's online monitoring solutions enable real-time detection of equipment anomalies, including partial discharges. These systems provide continuous monitoring, with instant alerts as soon as a partial discharge is detected. With these tools, companies can take preventive measures quickly and avoid costly failures.

4. Dissolved gas analysis with the OMICRON device (DGA)

OMICRON's DGA devices measure the concentration of dissolved gases in transformer oils. These gases are a valuable indicator of insulation degradation and partial discharges. Analyzing these gases helps proactively identify failure risks before they become critical.

Other preventive measures to limit partial discharges

• Improved insulation materials: The use of insulating materials with high dielectric and thermal properties, such as reinforced composites, reduces the risk of partial discharges.
• Predictive Maintenance: Implementing preventive maintenance programs using advanced monitoring technologies allows early detection of signs of insulation degradation.
• Reducing humidity and pollution: Maintaining a controlled environment with low humidity and an absence of contaminants is essential to limit the risk of partial discharges.

6. Conclusion: The importance of prevention and maintenance in electrical installations

Partial discharges pose a real risk to the reliability of high-voltage electrical equipment. However, thanks to advanced detection and analysis solutions offered by companies like OMICRON, it is possible to detect and locate these discharges before they cause significant damage.

A proactive approach, combined with preventative maintenance and the use of online monitoring tools, is essential to maintain the performance and safety of electrical installations. At Grid Energy Company, we offer quality maintenance and monitoring services to ensure the longevity of your electrical equipment, while using the latest technologies to detect and prevent risks associated with partial discharges.

7. Why call on an expert for your electrical protection needs?

Grid Energy Company offers specialized services for monitoring, maintenance, and partial discharge detection in your facilities. We work with cutting-edge solutions, such as those offered by OMICRON, to ensure the safety and performance of your electrical equipment. Contact us to learn more about our services and solutions tailored to your specific needs.