Online monitoring sensors for high-voltage equipment are specialized devices that continuously track the real-time status of critical assets like transformers, circuit breakers, and cables. Their operating principle involves non-invasive measurement of key physical and chemical parameters. They use various sensing techniques: Ultrasonic/acoustic sensors detect partial discharges by capturing sound waves from insulation breakdown; Fiber-optic temperature sensors use light wavelength shifts to measure hotspot temperatures; Gas-in-Oil sensors (DGA) analyze dissolved gases in transformer oil to identify internal faults like arcing or overheating.
Product Features
1. Real-Time Data and Predictive Capability: They provide continuous, real-time data streams, enabling predictive maintenance by identifying gradual degradation trends and incipient faults before they cause catastrophic failures.
2. Enhanced Safety and Non-Intrusive Design: These sensors allow for remote monitoring, minimizing the need for manual inspections in hazardous high-voltage environments. Their non-invasive nature ensures the integrity of the primary equipment is maintained.
3. Data-Driven Decision Making: By converting physical conditions into actionable data, they form the core of condition-based maintenance strategies, helping utilities optimize maintenance schedules, extend equipment life, and improve grid reliability.
Common Applications
These sensors are vital for the smart grid and asset management:
1. Power Transformers: Monitoring dissolved gases, moisture content, core condition, and winding temperature.
2. Switchgear and Circuit Breakers: Tracking contact wear, operating mechanism timing, and partial discharge activity.
3. High-Voltage Cables: Detecting partial discharges and monitoring temperature along the cable route.
