SYSTEM FOR AUTOMATIC COMPENSATION OF REACTIVE POWER AND VOLTAGE DEVIATION WITH PULSE WIDTH MODULATION ON TRANSFORMER SUBSTATION HV SIDE

摘要

FIELD: electrical engineering.;SUBSTANCE: device contains a booster transformer placed on the substation HV side and controlled from the voltage amplitude and phase converter with an intermediary DC link. The converter is fed from the load. The discrete stage of reactive power compensation is the network cosine capacitors bank. In case of the RL-load high inductance the inverter operates in a leading phase, supplementing the capacitors' action while in case of low inductance it operates in a lagging phase, neutralising the action with the discrete stage.;EFFECT: voltage quality upgrade and improvement of substations energy and weight and dimension indices.;2 dwg