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Security-Constraint Unit Commitment Using Classical And Hybrid Methods
, M.Sc. Thesis Sharif University of Technology ; Ehsan, Mehdi (Supervisor) ; Rashidi-Nejad, Masoud (Supervisor)
Abstract
Fast growing load in power systems associated with a large gap between heavy load and light load periods, generation scheduling and unit commitment (UC) problem has become a crucial issue in Scheduling time horizon. In a vertically integrated power system, unit commitment determines when to start-up or shut-down units and how to dispatch online generators over a given scheduling horizon in order to minimize the operating costs. Therefore main objective of this thesis is selected as unit commitment considering ramp rate, emission and line flow constraints. In this thesis four main works has been done: at first generation scheduling considering next hour is done which may yield to increase...
Planning in microgrids with conservation of voltage reduction
, Article IEEE Systems Journal ; Volume 12, Issue 3 , 2018 , Pages 2782-2790 ; 19328184 (ISSN) ; Nouri, A ; Ghadimi, N ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2018
Abstract
The main focus of this paper is to find an upgrade plan for a microgrid. This plan includes system lines' upgrades, the place, and size of the new capacitors and DERs. As usual, the planning process is begun with the load forecasting. The main objectives include minimization of system upgrade cost, loss cost, loss cost in peak load, and finally demand cost. The last objective is realized here using the tap changer of the main station transformer and reactive power support of the sources available or planned for the future of the grid. This is always referred to as the conservation of voltage reduction. In order to consider the effects of bus voltages on the system demand, the ZIP model for...