Voltage Magnitude

Views Updated: Dec 15, 2025

Abbreviation

Pronunciation

/ˈvoʊltɪʤ ˈmægnəˌtud/

A new conception of power per unit impedance is defined and the basic equation to express the variation of load voltage magnitude with the variation of its dynamic equivalent impedance a.
Voltage sag not only causes drop of voltage magnitude, but also results in sudden changes of the phase angle, hence the difficulty of compensation is further increased.
In static load modeling, the nonlinear mapping between active power or reactive power and voltage magnitude, frequency and load parameters is established by SVM.
Aiming at transient variations of voltage magnitude, which is one of the power quality issues, the background and actuality in the area are introduced. Then in this paper, a transformer-less series voltage transient variation compensator topology without energy storage capacitors is analyzed.
The negative effects of load caused by the negative sequence component of the supply voltage can be eliminated and the load voltage magnitude can be restored to referenced value by using the three phase voltage source inverter.

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