An Intelligent Voltage Controller for Static VAR Compensators

The paper presetrrs a novel AI-rule based itrtelligeirt conrroller for fired capacitor-thyristor controlled reactor (FC-TCR) static VAR Compensator (SVC). The brrelligenr rolrage regulator is based on the concept of the error escrrrsiorr plarie where the stubilizing actiow is scaled by the magnitude of the excursion voltage error I'ector, irr order to etuure adequate compensation. The proposed ride based voltage regulator is validated using ATPIEMTP and is compared with an optimized con\*entional proporrional plus ititegt-a1 voltage controller. The proposed rule based desigti is robust and tolerares system parameter rariatiorrs as well as nwdellirig inaccrrracirs. sincc the control lewl is only scaled by the location of the Ldrage e.\-cursioti error wctor in the (e,-?,,) error plane. The schenre is ralidared for fwo large system conringencies eonrprisitig load rejectiotr and a three phase short circrtir furtlt followed b y loss of U transmission line.