Reactive power compensation system and method thereof

A reactive power compensation system which compensates leading reactive power or lagging reactive power, the system comprising:

• a first measurement unit configured to measure impedance of each of at least one load;
• a second measurement unit configured to measure a voltage and current provided to the at least one load;
• a reactive power compensation unit configured to compensate the leading reactive power or the lagging reactive power;
• and
• a controller configured to monitor a change of the impedance in real time, check a change of the voltage or current according to the change of the impedance, and control the reactive power compensation unit according to a result of the check to compensate the leading reactive power or the lagging reactive power,
• wherein the controller determines based on the change of the voltage or current whether a specific load causing the change of the impedance is a Thyristor-switched load or a Thyristor-controlled load.