The longer the use of power capacitors, the greater the possibility of capacity degradation, insulation aging, and other issues that cannot be completely avoided. In practical operation, capacitors may also accelerate aging due to various factors such as high temperature.
Those things about the aging of power capacitors
The aging of power capacitors refers to the slow decline in their performance. If the aging is severe, the capacitor will not be able to function properly. Aging problems can generally be divided into two types: thermal aging and electrical aging.
The high working temperature or ambient temperature of power capacitors can accelerate their thermal aging, leading to dielectric loss, a decrease in capacitance value, and a shortened actual service life.
Electrical aging is usually caused by surges caused by overvoltage during operation or capacitor shutdown, which can lead to capacitor discharge, breakdown, and other faults, and in severe cases, may cause power capacitor explosions.
How to avoid it?
It is normal for the performance of power capacitors to decline over time, but if users operate according to relevant requirements, the aging rate of capacitors can be slowed down. The specific operation is as follows:
1. Try to ensure that power capacitors operate at rated voltage and rated voltage, and avoid long-term overvoltage and overcurrent operation.
2. Control the ambient temperature of the power capacitor bank to ensure that the capacitor casing can detect the temperature in real-time within the specified range during operation. If the temperature is abnormal, it is necessary to shut down the operation in a timely manner.
3. System harmonic problems should be actively addressed to avoid resonance phenomena.
4. Choose high-quality power capacitor products and strive to provide them with a better operating environment.
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