2 research outputs found
Dynamic Placement Analysis of Wind Power Generation Units in Distribution Power Systems
The placement problem of distributed generators (DGs) in distribution networks becomes much more complicated in the case of using the DGs with renewable energy resources. Due to several reasons such as, their intermittent output powers, the interactions between DGs and the rest of the distribution network, and considering other involved uncertainties are very vital. This paper develops a new approach for optimal placement of wind energy based DGs (WDGs) in which all of such influences are carefully handled. The proposed method considers the time variations of dynamic nodal demands, nodal voltage magnitudes, and wind speed in the WDG placement process simultaneously. Thereby, an accurate dynamic model of the active and reactive powers injected by the WDG to the system is employed in which the interactions between the WDG and the distribution network are well regarded. Finally, simulation results are given to show the capability of the proposed approach. As it is demonstrated in the numerical analysis of the radial 33-bus distribution test network, the proposed placement algorithm can efficiently determine the optimal bus for connecting the WDG and is suitable for real applications
A nonlinear equivalent circuit model for flux density calculation of a permanent magnet linear synchronous motor
In this paper, a nonlinear magnetic equivalent circuit is presented as an
analytical solution method for modeling of a permanent magnet linear
synchronous motor (PMLSM). The accuracy of the proposed model is verified via
comparing its simulation results with those obtained by two other methods.
These two are the Maxwell’s Equations based analytical method and the
wellknown finite elements method (FEM). Saturation and any saliency e.g.
slotting effects can be considered properly by both nonlinear magnetic
equivalent circuit and FEM, where it cannot be taken into account easily by
the Maxwell’s Equations based analytical approach. Accordingly, as the
simulation results presented in this paper confirm, the proposed nonlinear
magnetic equivalent circuit is compatible with FEM regarding the accuracy
while it requires very shorter execution time. Therefore, the magnetic
equivalent circuit model of the present paper can be considered as a
preferable substitute for the time consuming FEM and approximated analytical
method built on Maxwell’s Equations in particular when required to be applied
for a design optimization problem