MAINTENANCE OF ELECTRICAL SUBSTATIONS
The core of wind turbines
Preventive maintenance (scheduled)
• Visual inspections: Check for corrosion, oil leaks, unusual noise, cracks in insulators.
• Cleaning: Dust, salt, or bird droppings can cause tracking and flashovers.
• Tightening connections: Prevent overheating and arcing at busbars,
terminals, and grounding points.
• Testing protective relays: Ensuring protection systems (overcurrent,
differential, distance relays) work correctly.
• Lubrication: Moving parts of disconnectors and circuit breakers.
Predictive maintenance (condition-based)
• Thermographic inspections (infrared cameras): Detect hot spots in
connections and transformers.
• Oil analysis of power transformers: Dissolved gas analysis (DGA) reveals
insulation aging or faults.
• Partial discharge (PD) testing: Identifies insulation defects in cables and
switchgear.
• Online monitoring: SCADA systems track load, voltage, breaker operations,
and alarms.
Corrective maintenance (unscheduled)
• Replacing failed fuses, surge arresters, or transformers.
• Repairing protection/control equipment after faults.
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MAINTENANCE OF ELECTRICAL SUBSTATIONS
The core of wind turbines
Critical equipment we maintain
• Power transformers: Oil levels, bushings, tap changers.
• Gas-insulated switchgear (GIS) or Air-insulated switchgear (AIS): SF₆ gas monitoring (for
GIS), breaker mechanism tests.
• Circuit breakers: Timing tests, contact resistance checks.
• Protection relays & SCADA systems: Firmware updates, calibration.
• Grounding system: Measure soil resistance, inspect ground connections.
• Auxiliary systems: Batteries, chargers, HVAC for control rooms.
Maintenance intervals
• Monthly/Quarterly: Visual checks, SCADA data review, thermography.
• Annually: Protection relay testing, transformer oil sampling,
breaker mechanism tests.
• Every 3–5 years: Comprehensive transformer diagnostics, circuit breaker overhauls.
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MAINTENANCE OF ELECTRICAL SUBSTATIONS
Reliable, efficient, customized remote data monitoring
Our remote data monitoring solution delivers measurable value to wind farm operators. From our manufacturer-independent service control center, we monitor your wind farm around the clock and manage incoming fault notifications in real time. In most cases, we can resolve issues directly from our control center, reducing the need to dispatch a service team to the turbine.
Through continuous documentation and detailed analysis of your wind farm data, we provide performance forecasts and long-term recommendations tailored to each turbine. The scope of our remote operations is fully adaptable to your specific needs, ensuring cost efficiency and maximum availability.
Our key services include:
• 24/7 monitoring, 365 days a year
• Real-time fault detection and elimination
• Data analysis and performance evaluation
• Transparent and up-to-date client information management
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