130 citations · 218 across the 6 of their papers we have counts for
8 papers
Computationally Efficient Solutions for Large-Scale Security-Constrained Optimal Power Flow
Mohammadhafez Bazrafshan, Kyri Baker, Javad Mohammadi
In this paper, we discuss our approach and algorithmic framework for solving large-scale security constrained optimal power flow (SCOPF) problems. SCOPF is a mixed integer non-conv…
Optimal Power Flow with Step-Voltage Regulators in Multi-Phase Distribution Networks
Mohammadhafez Bazrafshan, Nikolaos Gatsis, Hao Zhu
This paper develops a branch-flow based optimal power flow (OPF) problem for multi-phase distribution networks that allows for tap selection of wye, closed-delta, and open-delta st…
A Fixed-Point Iteration for Steady-State Analysis of Water Distribution Networks
Mohammadhafez Bazrafshan, Nikolaos Gatsis, Marcio Giacomoni +1
This paper develops a fixed-point iteration to solve the steady-state water flow equations in an urban water distribution network. The fixed-point iteration is derived upon the ass…
Robust Control for Renewable-Integrated Power Networks Considering Input Bound Constraints and Worst-Case Uncertainty Measure
Ahmad F. Taha, Mohammadhafez Bazrafshan, Sebastian Nugroho +2
Uncertainty from renewable energy and loads is one of the major challenges for stable grid operation. Various approaches have been explored to remedy these uncertainties. In this p…
Coupling Load-Following Control with OPF
Mohammadhafez Bazrafshan, Nikolaos Gatsis, Ahmad Taha +1
In this paper, the optimal power flow (OPF) problem is augmented to account for the costs associated with the load-following control of a power network. Load-following control cost…
Comprehensive Modeling of Three-Phase Distribution Systems via the Bus Admittance Matrix
Mohammadhafez Bazrafshan, Nikolaos Gatsis
The theme of this paper is three-phase distribution system modeling suitable for the Z-Bus load-flow. Detailed models of wye and delta constant-power, constant-current, and constan…
Convergence of the Z-Bus Method for Three-Phase Distribution Load-Flow with ZIP Loads
Mohammadhafez Bazrafshan, Nikolaos Gatsis
This paper derives a set of sufficient conditions guaranteeing that the load-flow problem in unbalanced three-phase distribution networks with wye and delta ZIP loads has a unique…
Decentralized Stochastic Optimal Power Flow in Radial Networks with Distributed Generation
Mohammadhafez Bazrafshan, Nikolaos Gatsis
This paper develops a power management scheme that jointly optimizes the real power consumption of programmable loads and reactive power outputs of photovoltaic (PV) inverters in d…