RANCANG BANGUN PFC YANG DILENGKAPI METERING DENGAN PENGONTROLAN CAPASITOR BANK UNTUK BEBAN DINAMIS

Power Factor Corection (PFC) will be needed by the industries that use motors for the process industry. When using the motor as well as the industry bears the burden of reactive power required by the motor to rotate. With inductive loads such as motors properties causing low power factor (θ Cos). State Electricity Company (PLN) to determine Cos θ as low as 0.85, if under 0.85, the enterprises will get a fine. To anticipate the company use capacitor banks to improve cos θ above 0.85. Method for soft switches SCR capacitor bank is highly recommended. By using soft-switch SCR will improve cos θ as well eliminate the charging capacitor bank inrush currents which can reach 150-300 times nominal current of charging capacitor bank. In the dynamic motor load using a step-capacitor used in accordance with what is needed so that cos θ can be closer to the value set of points. Set point hysteresis value of cos θ of ± 0.01 to minimize fluctuations in the step of switching capacitor banks. With soft-switch SCR method for multiple step capacitor bank will increase the efficient of resources and economic factors of the capacitor bank equipment. Microcontroller is very important in applying the SCR method, the soft switch as a trigger SCR controller. Power factor improvement in motor load cos θ = 0.2 Laging become cos θ = 0.9839 to the setting points cos θ = 0.98. Based on simulation data for each step capacitor bank, a step capacitor bank made the cos θ = 0.265, two step capacitor bank made the cos θ = 0.382, 3 step method to make banks capsitor cos θ =0 .639, and four step capacitor bank made the cos θ = 1. Keywords: PFC, power factor, SCR soft switch, inrush current, microcontroller