Światłowodowe czujniki temperatury INNO ,systemy monitorowania temperatury.
Transformer online monitoring devices are crucial for real-time tracking of a transformer’s operating status, enabling early detection of potential faults and ensuring reliable operation. Here are the main types:
Oil Quality Monitoring Devices
- Analiza rozpuszczonego gazu (DGA) Systemy: Continuously monitor gases dissolved in transformer oil (such as methane, etan, etylen, acetylen). Abnormal gas concentrations or ratios indicate insulation degradation (np., partial discharge or overheating), helping predict faults like arcing or thermal breakdown.
- Moisture-in-Oil Sensors: Measure water content in oil. Excessive moisture reduces insulation strength, increasing the risk of flashover. Real-time data helps maintain oil dryness through dehydration systems.
- Oil Temperature and Level Monitors: Track oil temperature (critical for load management) and oil level (to detect leaks). Sudden temperature rises or level drops trigger alarms.
Insulation Monitoring Devices
- Częściowe rozładowanie (PD) Monitory: Detect partial discharges in insulation (np., in windings or bushings) using sensors (ultrasonic, electromagnetic, or UHF). PD activity accelerates insulation aging, and early detection prevents catastrophic failures.
- Insulation Resistance Monitors: Measure the insulation resistance of windings, tuleje, i rdzeń. A gradual decrease indicates insulation deterioration, allowing timely maintenance.
Winding and Core Monitoring Devices
- Fluorescencyjne światłowodowe czujniki temperatury: As discussed earlier, these directly measure winding hot spot temperatures with high precision, unaffected by electromagnetic interference. Critical for preventing insulation overheating.
- Core Ground Current Monitors: Monitor current in the core’s grounding wire. Abnormal currents (above a few mA) indicate core insulation issues (np., multiple ground points), which can cause local overheating.
Bushing and Tap Changer Monitoring Devices
- Bushing Monitoring Systems: Measure bushing capacitance, tanδ (dielectric loss), i temperatura. Changes in these parameters signal insulation degradation, reducing the risk of bushing failures.
- Przełącznik zaczepów pod obciążeniem (OLTC) Monitory: Track OLTC operation (np., zużycie kontaktowe, oil quality, and mechanical status) via vibration analysis, current/power monitoring, and oil DGA. Ensures smooth voltage regulation and extends OLTC life.
Gas and Pressure Monitoring Devices
- Gas Relay (Buchholz Relay): A traditional but essential device. It detects gas accumulation or oil flow caused by internal faults (np., zwarcia), triggering alarms or tripping the transformer to prevent damage.
- Tank Pressure Monitors: Monitor the pressure inside the transformer tank. Sudden pressure spikes indicate severe internal faults (np., łukowe), enabling rapid shutdown.
External Environment Monitoring Devices
- Ambient Temperature and Humidity Sensors: Track the environment around the transformer. High humidity combined with dust can lead to surface insulation issues, while extreme temperatures affect cooling efficiency.
- Security and Vibration Sensors: Detect unauthorized access, wandalizm, or abnormal vibrations (indicating loose components or structural issues), enhancing overall transformer safety.
Communication and Integration Systems
Most online monitoring devices connect to a central SCADA (Kontrola nadzorcza i pozyskiwanie danych) system or a dedicated transformer monitoring platform. Data is analyzed in real-time, with trends tracked to predict maintenance needs, enabling condition-based rather than scheduled maintenance.
These devices work together to provide a comprehensive view of a transformer’s health, minimizing downtime and maximizing operational efficiency.
Światłowodowy czujnik temperatury, Inteligentny system monitorowania, Producent rozproszonych światłowodów w Chinach
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