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Developing a Control Algorithm for the new Power Quality Device (HPFC)

Rezaei Zavieh, Ali | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49054 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Mokhtari, Hossein
  7. Abstract:
  8. Non-linear loads have been increasing in industries resulting in high levels of harmonics in power networks. Harmonics have several negative effects including higher energy losses and lifespan reduction in equipment due to thermal loss. To reduce the levels of harmonics and consequently reduce the losses in power networks different methods of harmonic suppression have been employed. These methods are normally used at the customer’s side. In all of these methods, the idea is to prevent harmonics from flowing into a power network at the Point of Common Coupling (PCC). This research tries to reduce the harmonic losses by controlling the harmonic flow in a power network. Therefore, the solution is a network solution as compared to the existing methods which are local solutions. The idea is to control the harmonic flow by injecting a suitable harmonic voltage in a power line. This controlled harmonic injection can be done by a series active power filter. In the proposed application, the series active power filter does not compensate any source harmonic, but changes the harmonic flow in the system. Therefore, the device can be named as harmonic power flow controller or simply HPFC. Even though several applications, such as resonance prevention through controlling the frequency response of the network, can be obtained by the HPFC, only harmonic loss reduction and voltage profile improvement applications are discussed in this research. The proposed method is tested on the IEEE 14 bus system. The results show that the harmonic losses can be reduced if the HPFC is properly controlled. Besides, simulations show that HPFC can be considerably effective in controlling harmonic voltage levels in the buses of the network
  9. Keywords:
  10. Voltage Distortion ; Harmonic Filters ; Distributed Networks ; Harmonic Losses ; Total Harmonic Distortion ; Control Algorithm ; Power Quality ; Power Network

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