
The cooling system of a STATCOM (Static Synchronous Compensator) is crucial for maintaining optimal performance and reliability, as power electronics (IGBTs, capacitors, etc.) generate significant heat during operation. The choice of cooling depends on the STATCOM’s power rating, installation environment, and efficiency requirements.
Used for: Low to medium power STATCOMs (up to ~50 MVA).
How it Works:
Heat sinks and fans dissipate heat from IGBT modules.
Ambient air is circulated using forced ventilation.
Advantages:
Simple, low maintenance.
No risk of coolant leakage.
Disadvantages:
Less efficient for high-power applications.
Sensitive to dusty/humid environments.
Example Applications:
Industrial plants, small wind/solar farms.
Used for: Medium to high-power STATCOMs (50 MVAr to 300 MVAr+).
How it Works:
Coolant (deionized water or glycol mixture) circulates through cold plates attached to IGBTs.
Heat is transferred to a heat exchanger and dissipated via radiators or chillers.
Advantages:
Higher heat dissipation than air cooling.
Compact design, suitable for high-density power electronics.
Disadvantages:
More complex (pumps, pipes, heat exchangers).
Risk of leaks if not properly maintained.
Example Applications:
HVDC stations, large solar/wind farms, transmission grid STATCOMs.
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