Person:
Saeedifard, Maryam

Permanent Link
https://hdl.handle.net/1853/71660
Associated Organization(s)
ORCID
ArchiveSpace Name Record

Filters

2018 2
2
1 1
2
2
Reset filters

Settings

Publication Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Sequential Tripping of Hybrid DC Circuit Breakers to Enhance the Fault Interruption Capability in Multi-Terminal DC Grids
    ( 2018-10) Sun, Jingfan ; Song, Y. ; Saeedifard, Maryam ; Meliopoulous, A. P.
    he hybrid solid-state DC circuit breakers (DC CBs) have become one of the most promising technologies to address the protection challenges within multi-terminal DC (MTDC) grids. Those breakers are designed in such a way that a large number of identical modules are connected in series to enable extinguishing the fault current with the arresters embedded in them. Conventionally, these modules are commanded to trip simultaneously, creating significant overvoltage and overcurrent stresses for the rest of the system. To attenuate these adverse impacts, in this paper, a sequential tripping method is proposed to improve the performance of hybrid DC CBs through commanding the main breakers to trip in a sequential manner. It has been verified that by the proposed method, fault clearance is expedited while the maximum overcurrent is reduced. To address the unbalanced energy absorptions among the different modules of the CB, a modified sequential tripping scheme is also proposed. By rescheduling the sequential tripping sequence, this method enables an equal redistribution of energy, which greatly reduces the risk of thermal overloading. Both of the proposed methods are evaluated and tested under a practical six-terminal DC grid in the PSCAD/EMTDC software environment. The performance and effectiveness of the proposed methods are confirmed by simulation results.
  • Thumbnail Image
    Item
    Haiti RELAY: A Cost-Effective and Portable Solar Home System for Rural Haitian Regions
    ( 2018-09) Smith, Jake ; Kinsel, Adam ; Matthews, Bria ; Sun, Jingfan ; Saeedifard, Maryam ; Lambert, Frank
    Haiti is a Caribbean country located next to the Dominican Republic on the island of Hispaniola. Currently the poorest country in the Western Hemisphere, Haiti suffers from a lack of energy infrastructure leaving over 7.4 million people without power. The electrification rates are the worst in the rural, mountainous regions of Haiti where in 2013 only 15% of residents had access to electricity. The Georgia Institute of Technology’s Haiti RELAY team was created in 2015 to help spark the growth of electrification rates in these regions through the development of a simple, cost-effective, and portable solar home system called the “Haiti RELAY”. This fully-integrated solar charge controller device was designed through a data-driven approach to provide a consistent means for house lighting and phone charging. In May 2018, the Haiti RELAY team travelled to enact the Haiti RELAY pilot program in the mountains of Thoman, Haiti. As a part of this program, 25 families acquired a RELAY and agreed to provide feedback to help the team understand the efficacy of the design and the necessary improvements for moving the product towards full-scale production. This paper details the energy situation in Haiti, construction and functionality of the Haiti RELAY, and the results of the 2018 mission to Thoman.