REACTIVE POWER REGULATION PROCEDURE Russian patent published in 1994 - IPC

FIELD: electric power supply systems. SUBSTANCE: angle of shift between load current and supply voltage is used as reactive power parameter which is converted into group of rectangular pulses with a repetition rate of one el. degree. Then measured parameter is compared with settings; numeric value of first setting ϕ₁ is assumed to equal arc cosine or arc tangent of power factor specified by power system, and numeric value of second setting ϕ₂<ϕ₁. If reactive power is of inductive character, and angle of shift between current and supply voltage is greater than ϕ₁, reactive power is reduced; if angle of shift is below ϕ₂, reactive power is raised; if reactive power is of capacitive character and angle of phase shift is greater than ϕ₁ or smaller than ϕ₂, reactive power is reduced. EFFECT: improved maintenance of desired reactive power balance. 2 dwg