Results 271 to 280 of about 394,161 (298)

Three-phase power and harmonic flow

1998
In this chapter, a three-phase power-flow and harmonic-converter model are combined and solved using both the sequential and unified Newton's methods. Interaction between the three-phase power flow and a three-phase harmonic converter model has been solved using both decoupled and full Newton methods. The decoupled method displays good convergence if a
openaire   +1 more source

Calculation of three-phase harmonic power flow in power systems with traction loads

POWERCON '98. 1998 International Conference on Power System Technology. Proceedings (Cat. No.98EX151), 2002
The mathematical model of an SS4 type electric locomotive, made in China, is first introduced. By considering the harmonic source as a controlled current source, a new algorithm of solving three-phase asymmetrical harmonic power flow in power systems with traction loads is presented.
null Li Gengyin, null Xu Chunxia, null Liu Guanqi, null Zhao Chengyong   +3 more
openaire   +1 more source

Multi-period three-phase unbalanced optimal power flow

IEEE PES Innovative Smart Grid Technologies, Europe, 2014
Unbalanced three-phase distribution networks are undergoing significant changes with the advent of modern distributed energy resources (DER). These DER come in the form of both load and generation, such as electric vehicles, heat pumps, photovoltaics and micro wind turbines, and have the potential to drastically modify customers' behaviours and needs ...
Alison O'Connell, Andrew Keane
openaire   +1 more source

Three-phase newton raphson power flow considering microgeneration

2013 IEEE PES Conference on Innovative Smart Grid Technologies (ISGT Latin America), 2013
This paper presents results of investigations on issues related to inclusion of microgeneration and micro-grids in distribution systems and the difficulties imposed on load flow programs. Aspects of modeling using current injection in rectangular coordinates and solution by Newton-Raphson's method are presented.
V. Zimmer, D. Tenfen, I. C. Decker, F. A. B. Lemos   +3 more
openaire   +1 more source

The existence of multiple power flow in unbalanced three-phase circuits

2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491), 2004
This paper presents a new phenomenon found for unbalanced power flow solutions-the existence of two voltage solutions at the neutral points of unbalanced three-phase circuits. The phenomenon is different from that found in traditional single-phase balanced power flow solutions. It is dependent on the degree of system or load unbalance. If the unbalance
Y. Wang, W. Xu
openaire   +1 more source

Three-phase fast decoupled power flow for distribution networks

IEE Proceedings - Generation, Transmission and Distribution, 1996
Power system single-phase models assume that generation, transmission and distribution systems are perfectly balanced. The great appeal of this type of model is its simplicity, for all the calculations become quite simple, when compared with the three-phase model, and the results obtained are well suited for most applications. There are cases, however,
A.V. Garcia, M.G. Zago
openaire   +1 more source

A modular approach to the solution of the three-phase harmonic power-flow

IEEE Transactions on Power Delivery, 2000
This paper describes a modular algorithm for solution of power systems containing active nonlinear devices such as power converters. The solution is a unified real-valued Newton method allowing simultaneous solution of electrical and nonelectrical variables.
G.N. Bathurst, B.C. Smith, N.R. Watson, J. Arillaga   +3 more
openaire   +1 more source

Three Phase Power Flow Incorporating Static Var Compensator

Applied Mechanics and Materials, 2014
Application of Flexible AC Transmission Systems (FACTS) devices in a power system is a promising and more efficient way for the transfer and control of bulk amount of power. One of the problems encountered in power-systems operation is the generation of unbalanced voltages and currents in the presence of long transmission lines with few or no ...
B. Karthik, Jerald Praveen Arokkia, S. Sreejith, S. Rangarajan Shriram   +3 more
openaire   +1 more source

Three phase current iteration power flow method using fortescue transformations

2012 3rd IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe), 2012
Analysis of power systems is normally executed using either phase coordinates or symmetrical components. In most cases, the decision on the selection is based on the type of the network and its loading. Most of the approaches use symmetrical components only in cases of a balanced network with a balanced loading for the calculation of the electrical ...
Izudin Dzafic, Hans-Theo Neisius, Sylwia Henselmeyer   +2 more
openaire   +1 more source

Three-phase vector switching converters for power flow control

IEE Proceedings - Electric Power Applications, 2004
As congestion in AC power transmission systems increases due to technical limitations, environmental pressures, economic necessities and developmental demands, devices with ability to control power flow with much greater ease than presently possible would be highly desirable.
openaire   +1 more source