A dynamic reactive power compensation method for high-power and high-voltage electronic motors based on self-adaptive fuzzy PID control

Due to the low PF (Power Factor, PF) of high-power and high-voltage electronic motor, the reactive power consumed during the soft starting period and the operating period are different. This paper proposes a dynamic reactive power compensation method for high-power and high-voltage electronic motors based on self-adaptive fuzzy PID control to stabilize power grid voltage and reduce energy consumption. The following results were achieved: (1) developed a topology structure of a dynamic reactive power compensation device for high-power and high-voltage electronic motors; (2) investigated the control theory of a dynamic reactive power compensation system for high-power and high-voltage electronic motors; (3) proposed a regulation algorithm to calculate the equivalent inductance of VIL (Variable Inductance Load, VIL), L based on the self-adaptive fuzzy PID control. The proposed method was deployed by Da Yu Electric Ltd. to develop soft-start devices according to the soft starting demand for the 10 kV, 21000 kW blower load in a steel-manufacturing plant. Current and reactive power compensations were limited during the process of starting the motor, and reactive power compensation was limited after soft starting. In this way, the overall starting performance of high-power and high-voltage electronic motors was improved, energy consumption was reduced, and the power grid voltage was stabilized.