Seeking advice from experts on the issue of excessively high voltage after capacitor compensation
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A few days ago, some capacitors were installed, and the voltage reached 420V. However, the power factor was not high. The dry-type transformer made a lot of noise, and its phase transition temperature increased as well. The controller built into the capacitor cabinet stopped working, and why was the power factor negative?
It is normal for the voltage to rise after reactive power compensation is activated. The main reason is that after the capacitor is connected, the reactive current decreases, the line loss voltage drop reduces, and as a result, the network voltage rises naturally. The reason why the power factor you mentioned is negative could be an incorrect wiring; please check it.
To address the issues related to control, it is recommended to check the electrical secondary control circuits of the equipment, to see whether the electrical wiring and control logic are correct ? ?
A negative power factor may indicate overcompensation. Generally, the power factor of inductive loads (L) is lagging, while that of capacitive loads (C) is leading, and it is represented by a negative value. In general, it is not desirable for the power factor to be leading or lagging; however, most electrical devices are inductive loads, so capacitive reactance is needed for compensation in order to bring the power factor close to 1