Reactive power compensation system having capacitors with parallel connected discharge resistors

摘要

A reactive power compensation system 18 of the type having thyristor switched capacitors 12, In which a thyristor 14 and a diode 15 are connected in anti-parallel configuration, has a discharge resistor 13 connected in parallel with each capacitor 12. The switching of the capacitors 12 may be triggered without delay from the determination of the optimum switching instants after detection of the zero crossing instants. The power factor of a load may therefore be corrected to approach unity whilst using components of lower power rating and providing fast response to load variations.