Switchgear online monitoring and comprehensive analysis system

Core monitoring functions

1. Partial Discharge Monitoring: Capture the electrical discharge signals generated by insulation defects and provide early warning of insulation aging risks.
2. Temperature monitoring: real-time tracking of busbar, joints and other critical parts of the temperature, to prevent overheating and burning failure.
3. Environment and gas monitoring: monitor the temperature and humidity inside the cabinet, SF6 gas leakage (high-voltage cabinets), to avoid failure caused by environmental factors.
4. Electrical parameter monitoring: collect voltage, current, power and other data to judge the stability of equipment operation.

core value

1. Safeguard safety: replace manual inspection, capture potential faults in real time, and reduce the risk of power-carrying operations.
2. Enhance efficiency: realize condition maintenance, avoid blind power outage for maintenance, and prolong the service life of the equipment.
3. Reduce costs: Reduce troubleshooting costs and unplanned outage losses, and optimize O&M resource allocation.

System Core Components

1. Sensing layer: various types of sensors (ultrasonic, transient ground voltage, temperature, gas sensors, etc.), responsible for data acquisition.
2. Transport Layer: transmits data to the analytics platform via wireless (LoRa, 4G/5G) or wired (Ethernet).
3. Analysis Layer: Based on AI algorithms and expert models, the data is analyzed for noise reduction, diagnosis and trends, and assessment reports are generated.
4. Application layer: visualization platform (computer terminal, mobile terminal), displaying real-time data, fault warning, historical records, etc.

What are the sensors in the perception layer of the switchgear online monitoring and comprehensive analysis system?

1. Local discharge monitoring sensors

• Transient Earth Voltage (TEV) Sensor: Captures the transient voltage signal on the surface of the switchgear enclosure and detects internal insulation partial discharges.
• Ultrasonic sensor: Collects ultrasonic signals generated during the discharge process to assist in locating the discharge position.
• High Frequency Current (HFCT) Sensor: Sleeve on the grounding wire to monitor the high frequency current pulse generated by the discharge, suitable for cable head, busbar and other parts.

2. Temperature monitoring sensors

• Passive wireless temperature sensors: take power through electromagnetic coupling, installed in high-voltage parts such as busbar connectors, circuit breaker contacts, etc., safe and no wiring.
• Infrared temperature sensor: non-contact monitoring of the surface temperature of the equipment inside the cabinet, suitable for areas where it is not convenient to install the sensor directly.

3. Environmental and gas monitoring sensors

• Temperature and humidity sensor: real-time monitoring of temperature and humidity inside the cabinet, early warning of condensation, high temperature and other environmental risks.
• SF6 Gas Sensor: For high voltage SF6 switchgear, detects the concentration of gas leakage to avoid insulation degradation or environmental risks.
• Oxygen sensor: Used with SF6 sensor to prevent oxygen deficiency inside the cabinet due to SF6 leakage and to protect personnel safety.

4. Electrical parameter monitoring sensors

• Current transformer (CT): collects busbar and branch circuit current data to monitor overload and three-phase unbalance.
• Voltage Sensor: Collects the operating voltage of the equipment and determines the voltage fluctuation, over-voltage/under-voltage and other abnormalities.
• Power sensors: synchronized acquisition of voltage and current signals, calculation of power factor, active power, etc., to assess equipment energy consumption and operating efficiency.