1. PFC basics EPCOS Power Quality Solutions

2. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 2 PFC Basics Ohmic loads Lighting bulbs Iron Resistive heating Capacative loads Capacitors Underground cables Over excited synchronous generators Inductive loads Electrical Motors Transformers Reactors/chokes Overhead lines Under excited Synchronous generators Discharge lamps Power electronic GRID  Different types of loads

3. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 3 PFC Basics  Real Power (kWh) 0  2  Ip POWER V

4. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 4 PFC Basics  Phase shifting of Voltage and Current V I 0  2  

5. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 5 PFC Basics  Different types of electrical power S = Apparent Power P = Active Power Q = Reactive Power Power factor = cos  cos-  = P (kW) / S (kVA)

6. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 6 Individual PFC Group PFC Centralized PFC Dynamic PFC De-tuned harmonic filter Tuned harmonic filter Active filter Types of Power Factor Correction

7. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 7 1. Individual (fixed) Compensation

8. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 8 2. Group Compensation MMM

9. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 9 4. Centralized Compensation MMM controller

10. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 10 MMM controller 5. Dynamic PFC

11. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 11 Advantages of dynamic PFC at a glance Real time power factor correction; e.g. essential for cranes or lifts Smooth switching of capacitors, avoids inrush current Less problems with power quality, such as voltage sags Longer life cycle of capacitor banks Dynamic PFC

12. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 12 Voltage sags due to high inrush currents 5. Dynamic PFC