Distribution network reconfiguration with reliability constraints

Abstract

Electric Distribution NetworksReconfiguration is carried out by the openlnglclosing of switching devices while keeping the feeder's radial topology. Traditionally, the reconfiguration of distribution networks bas been implemented aiming to: dnimize electric losses in the conductors, to enhance voltage profiles and balance the feeder's loads. However, the proposed methodologies for acbievhg these objectives do not include the reconfiguration impacts on the system reliability indices. The main aim of this paper i s to present a methodology for recon6gurating a distribution network with the objective of minimizing the electric losses taking into account constraints assodated with: overloads, voltage drops and violation of the targets for reliability indices. The proposed methodology for solving this problem is based on the Parallel Simulated Annealing algorithm. This methodology allows the generation of candidate solutions without violating topological constraintr,. The proposed model has been validated and t&ed in standard distribution systems.

Novel methodology for optimal reconfiguration of distribution networks with distributed energy resources

“…This helps in accommodating more DG variations without violating the voltage constraints given in Eq. (9). Thus, GR also helps in increasing the DG penetration in the distribution network in addition to loss minimization.…”

“…Y ij and  ij are the magnitude and phase of the branch admittance between the ith row and the jth column of the admittance matrix. (9) min and max represent the lower and upper bound on the voltage, respectively which is taken as ±10% of the nominal voltage. (3) Radiality constraint: the distribution network should remain radial, that is, one and only one feeder should feed a load (4) Load serving constraint: no load should be unserved…”

“…[6][7][8]. Under emergency operating conditions like faults in the lines, transformers or protection devices, [9,10] focused on minimizing the number of interrupted customers. Time varying load analysis to reduce distribution losses through GR was dealt with in [4,11].…”

Scenario analysis to account for photovoltaic generation uncertainty in distribution grid reconfiguration

“…Traditionally, literature on grid reconfiguration dealt with reconfiguring the medium voltage distribution grid. It was done with an aim to reduce the losses [2,3,4] or to restore power under fault conditions [5]. Recently, though research is done on the concept of reconfiguration of distribution networks that include distributed generation (DG) [1,6,7,8], there exists only very few works that take into account the variability or the uncertainty associated with DG.…”

Case study of distribution network reliability analysis based on probabilistic method

“…in [10] combines a monte-carlo simulation with an electrical network model and the behavior of the power system with sensitive load are considered. In [11] present a methodology for distribution network reconfiguration with reliability constraints.…”