Reactive Power Compensators Based on Simple AC Voltage Regulators

A new applying of AC voltage regulators with commutated capacitors is proposed. This allowed obtaining two versions of reactive power compensators. An analysis of such regulators using a direct calculation method is given, and the dependences of the output reactive power from the modulation depth are obtained. The quality of the generated capacitive current is estimated by its harmonic coefficient (THD). Comparison of compensators in terms of installed power of reactive elements and power loss in semiconductor elements is given.