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Investigation of Causes of Increased 5th Harmonic in Azarbayjan Regional Electricity Grid and Subject to Provide Practical Solutions to Reduce it

Pourtahmasebi, Farhad | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48046 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Mokhtari, Hossein
  7. Abstract:
  8. Iran's electrical grid is connected to the Eastern Turkey grid via Khoy-Basqale 400KV transmission line. Harmonic mesurements indicate high level of the 5th harmonic voltage in Azarbayjan grid which is magnified in Van substation. According to Iran international obligations and economic losses caused by the high level of harmonics in Azerbaijan regional electricity grid, a comprehensive study is required. Early studies showed that this unprecedented increase in the 5th harmonic voltage is due to the small harmonic loads scattered throughout the network. The aim of this thesis is to perform a comprehensive harmonic analysis of Azerbaijan network due to scattered harmonic loads. In this regard, measurements have been carried out in Iran and Turkey grid and the network has been modeled in DIgSILENT software. Due to the wide area network, an algorithm for optimal division of the network at harmonic frequencies has been proposed, and a reduced harmonic network from the perspective of Khoy busbar is introduced. Then, harmonic parameters of the loads have been estimated. The derived model has been verified performing several maneuvers in the network. In addition, optimal placement and design of 132KV harmonic filters and capacitor banks have been carried out using genetic algorithm considering practical limits. Also, the harmonic effects of the future plans in the region which change the utility topology have been analysed, and practical solutions for reducing the 5th harmonic voltage are suggested
  9. Keywords:
  10. Power Quality ; Genetic Algorithm ; Harmonic Analysis ; Frequency Response ; Optimal Placement ; Harmonic Loading ; Harmonic Filters

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