Title page for etd-0630115-124017


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URN etd-0630115-124017
Author John Sabelo Mahlalela
Author's Email Address oldjohnm@gmail.com
Statistics This thesis had been viewed 5360 times. Download 861 times.
Department IMEPE
Year 2014
Semester 2
Degree Master
Type of Document
Language English
Title Optimum Placement and Sizing of Harmonic Filters in Distribution Network
Date of Defense 2015-07-17
Page Count 141
Keyword
  • Filters
  • HPB Table
  • Harmonics
  • Distribution network
  • Harmonic Power flow
  • Abstract Due to the gradual increase of power conditioning devices integrated in the active distribution system, the future smart grid is expected to have more harmonic current injecting devices. This thesis presents a multi-objective harmonic filter allocation approach to optimally allocate harmonic filters in a distribution system with high penetration of distributed harmonic sources to minimize average voltage total harmonic distortion (THDv), maximize the power factor on the candidate buses and reduce the distribution system losses. Load variations and seasonal feeder reconfiguration are taken into account and the optimization problem is subject to THDv limit, voltage security, bus reactive power demand and radial topology constraints. The proposed method divides the annual load curves into multi-periods of load levels and optimizes the filter locations, sizes and the feeder configurations for different load levels in seasonal operation. Harmonic power flow in open distribution system simulator (OpenDSS) and the harmonics per bus (HPB Table) are used to provide guideline for searching optimal locations by using a genetic algorithm.
    Results of computational experiments have shown that a minimum set of passive harmonic filters (tuned capacitors) can provide reactive power support and suppress the propagation of harmonics in the distribution network due to photovoltaic, electric vehicle and machine drives. Numerical results of two test systems (IEEE 13 bus system and a modified 16 bus distribution network) are presented to validate the method. Combining harmonic planning problem and distribution system feeder reconfiguration can give a well-defined set of locations to install harmonic filters and help reduce harmonic impact throughout the season.
    Advisory Committee
  • Ching-Tsai Pan - chair
  • Chih-Wen Liu - co-chair
  • Chan-Nan Lu - co-chair
  • Chan-Nan Lu - advisor
  • Files
  • etd-0630115-124017.pdf
  • Indicate in-campus at 1 year and off-campus access at 1 year.
    Date of Submission 2015-07-30

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