PFC basics EPCOS Power Quality Solutions. PFC basics FK PC PM PFC – Lukas Motta – Jan. 2007 2 PFC Basics Ohmic loads Lighting bulbs Iron Resistive heating.

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Presentation transcript:

PFC basics EPCOS Power Quality Solutions

PFC basics FK PC PM PFC – Lukas Motta – Jan 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

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

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

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

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

PFC basics FK PC PM PFC – Lukas Motta – Jan Individual (fixed) Compensation

PFC basics FK PC PM PFC – Lukas Motta – Jan Group Compensation MMM

PFC basics FK PC PM PFC – Lukas Motta – Jan Centralized Compensation MMM controller

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

PFC basics FK PC PM PFC – Lukas Motta – Jan 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

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

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