Now showing items 1-10 of 77
A mixed-integer LP model for the reconfiguration of radial electric distribution systems considering distributed generation
The problem of reconfiguration of distribution systems considering the presence of distributed generation is modeled as a mixed-integer linear programming (MILP) problem in this paper. The demands of the electric distribution ...
Optimal reconfiguration of electrical distribution systems using mathematical programming
This paper presents a novel mixed integer nonlinear programming (MINLP) model for the reconfiguration problem of electrical distribution systems (EDS), aiming to reduce the active power losses of the system. Two linearization ...
Optimal allocation of distributed generators providing reactive power support ancillary service
Problems as voltage increase at the end of a feeder, demand supply unbalance in a fault condition, power quality decline, increase of power losses, and reduction of reliability levels may occur if Distributed Generators ...
Single-phase high power-factor boost ZCS pre-regulator operating in critical conduction mode
This paper presents a new single-phase interleaved high power factor boost pre-regulator operating in critical conduction mode, where the switches and boost diode performing zero-current commutations during its turn-off, ...
Crowbar System in Doubly Fed Induction Wind Generators
(MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL-MDPI, 2010)
In the last 15 years, the use of doubly fed induction machines in modern variable-speed wind turbines has increased rapidly. This development has been driven by the cost reduction as well as the low-loss generation of ...
A computational comparison of 2 mathematical formulations to handle transmission network constraints in the unit commitment problem
Until recently, transmission network constraints have been incorporated into the unit commitment (UC) problem (security-constrained UC [SCUC]) using the classical direct current (DC)-based equation. This paper proposes a ...