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Emre DURNA
 Definition of POWER QUALITY Definition of Harmonic Components Elimination of Current Harmonics Passive Filters Activ...
 Power   quality is the set of limits of electrical properties that allows electrical systems to function in their intend...
 Allof the signals can be represented as the  summation of sinusoidal signals of various  frequencies.
+               +               =                      5th             7th         ResultantFundemental        Harmonic   ...
 In  Power Systems, harmonics appear on the    current signals.       Motor Drives, Soft Starters, UPS       Power Elec...
 Vulnerable loads should be isolated from the  harmonic sources. Power    System transmission lines and  transformers ar...
 Pasive       Filters are composed of passive circuit elements such as resistor,capacitor and inductor ForPassive Filter...
 Active  Power Filters are simply power electronic converters, specifically designed to inject harmonic currents to the s...
 Voltage sourced active filters creates AC  voltage at its output terminal. Voltage sourced active filters use capacitor...
S1    S3      S5               Lf                                            VdcCf                    S4    S6      S2 Vol...
 Current sourced active filters creates AC  current at its output terminal. Current sourced active filters use inductor ...
S1      S3     S5   Lf                                          Ldc        Cf                     S4      S6     S2Current...
 Passive   Filters    Cheap, Easy design,Reliable,High Efficiency     BUT    Resonance Problems, Tuning for fixed frequ...
 DENIZLI-2          TM Active Power Filter (NATIONAL POWER QUALITY PROJECT)    Specifically designed for 5th Harmonic Fi...
Power Stage Panels   Control Panels
 Definition of POWER QUALITY Definition of Harmonic Components Elimination of Current Harmonics Passive Filters Activ...
 Wikipedia.           Power Quality en.wikipedia.org/wiki/Power_quality Denizli        2-TM Training Documents. TÜBİTAK ...
Active_Power_Filter
Active_Power_Filter
Active_Power_Filter
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Active_Power_Filter

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Brief introduction to active power filters

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Active_Power_Filter

  1. 1. Emre DURNA
  2. 2.  Definition of POWER QUALITY Definition of Harmonic Components Elimination of Current Harmonics Passive Filters Active Power Filters  Voltage Sourced Active Power Filters  Current Sourced Active Power Filters Active Power Filter vs Passive Filter Active Filter Application of TUBİTAK UZAY Summary References
  3. 3.  Power quality is the set of limits of electrical properties that allows electrical systems to function in their intended manner without significant loss of performance or life Reliable Mains:  Magnitude (Rated Voltage)  Frequency (50 Hz)  Sustainability  Stability
  4. 4.  Allof the signals can be represented as the summation of sinusoidal signals of various frequencies.
  5. 5. + + = 5th 7th ResultantFundemental Harmonic Harmonic Signal Component Component
  6. 6.  In Power Systems, harmonics appear on the current signals.  Motor Drives, Soft Starters, UPS  Power Electronic Converters  Industrial Loads, Single Phase Loads  AC to DC Converters (Rectifiers) are typical harmonic current sources. Current Harmonics,which reduces the power quality, are harmful for vulnerable loads. It distorts mains voltage.  Electronic Devices  Motors  Illumination Systems
  7. 7.  Vulnerable loads should be isolated from the harmonic sources. Power System transmission lines and transformers are over-loaded. Electromagnetic noises in systems.  So, current harmonics should be eliminated CURRENT HARMONICS ELIMINATION SYSTEMS  PASSIVE FILTERS  ACTIVE POWER FILTERS
  8. 8.  Pasive Filters are composed of passive circuit elements such as resistor,capacitor and inductor ForPassive Filters, the aim is to adjust the resonance frequency of the filter to desired harmonic elimination.
  9. 9.  Active Power Filters are simply power electronic converters, specifically designed to inject harmonic currents to the system. Active Power Filter Capabilities;  Eliminating Voltage and Current Harmonics  Reactive Power Compensation  Regulating Terminal Voltage  Compensating the Voltage flickering
  10. 10.  Voltage sourced active filters creates AC voltage at its output terminal. Voltage sourced active filters use capacitor (voltage sink) for DC Link. The output filter should be an inductor. LF Cdc
  11. 11. S1 S3 S5 Lf VdcCf S4 S6 S2 Voltage Sourced Active Power Filter Topology
  12. 12.  Current sourced active filters creates AC current at its output terminal. Current sourced active filters use inductor (current sink) for DC Link. The output filter should be a shunt capacitor. CF Ldc
  13. 13. S1 S3 S5 Lf Ldc Cf S4 S6 S2Current Sourced Active Power Filter Topology
  14. 14.  Passive Filters  Cheap, Easy design,Reliable,High Efficiency BUT  Resonance Problems, Tuning for fixed frequency  Fixed Reactive Power Compensation, Large Size Active Filters  No resonance problems, Can eliminate any harmonics (no tuning), Voltage regulation, Reactive Power Compensation,Reliable Operation BUT  Expensive, Complex control systems
  15. 15.  DENIZLI-2 TM Active Power Filter (NATIONAL POWER QUALITY PROJECT)  Specifically designed for 5th Harmonic Filtering  5 MVA  Current sourced converter based shunt active filter
  16. 16. Power Stage Panels Control Panels
  17. 17.  Definition of POWER QUALITY Definition of Harmonic Components Elimination of Current Harmonics Passive Filters Active Power Filters  Voltage Sourced Active Power Filters  Current Sourced Active Power Filters Active Power Filter vs Passive Filter Active Filter Application of TUBİTAK UZAY
  18. 18.  Wikipedia. Power Quality en.wikipedia.org/wiki/Power_quality Denizli 2-TM Training Documents. TÜBİTAK UZAY, Power Electronics Group.A Current Sourced Converter based Active Power Filter for mitigation of harmonics at the interface of distribution and transmission systems. Terciyanlı,A.; Avcı,T ; Ermiş, M. ; Çadırcı, I.

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