Allocation of Capacitors and Voltage Regulators in Three-Phase Distribution Networks

2018 ◽  
Vol 29 (2) ◽  
pp. 238-249 ◽  
Author(s):  
Géssica M. dos Santos Pereira ◽  
Thelma S. Piazza Fernandes ◽  
Alexandre R. Aoki
Keyword(s):  
Phase Distribution ◽  
Distribution Networks ◽  
Voltage Regulators ◽  
Three Phase

scholarly journals Optimal Selection of Conductors in Three-Phase Distribution Networks Using a Discrete Version of the Vortex Search Algorithm

Computation ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 80
Author(s):  
John Fernando Martínez-Gil ◽  
Nicolas Alejandro Moyano-García ◽  
Oscar Danilo Montoya ◽  
Jorge Alexander Alarcon-Villamil
Keyword(s):  
Objective Function ◽  
Power Flow ◽  
Phase Distribution ◽  
Search Algorithm ◽  
Distribution Networks ◽  
Discrete Version ◽  
Optimal Selection ◽  
Flow Method ◽  
Three Phase ◽  
Selection Of

In this study, a new methodology is proposed to perform optimal selection of conductors in three-phase distribution networks through a discrete version of the metaheuristic method of vortex search. To represent the problem, a single-objective mathematical model with a mixed-integer nonlinear programming (MINLP) structure is used. As an objective function, minimization of the investment costs in conductors together with the technical losses of the network for a study period of one year is considered. Additionally, the model will be implemented in balanced and unbalanced test systems and with variations in the connection of their loads, i.e., Δ− and Y−connections. To evaluate the costs of the energy losses, a classical backward/forward three-phase power-flow method is implemented. Two test systems used in the specialized literature were employed, which comprise 8 and 27 nodes with radial structures in medium voltage levels. All computational implementations were developed in the MATLAB programming environment, and all results were evaluated in DigSILENT software to verify the effectiveness and the proposed three-phase unbalanced power-flow method. Comparative analyses with classical and Chu & Beasley genetic algorithms, tabu search algorithm, and exact MINLP approaches demonstrate the efficiency of the proposed optimization approach regarding the final value of the objective function.

scholarly journals A Method Based on Only Currents for Determining Fault Direction in Radial Distribution Networks Integrated with Distributed Generations

2021 ◽  
Vol 20 ◽  
pp. 01-11
Author(s):  
Ngo Minh Khoa ◽  
Tran Xuan Khoa
Keyword(s):  
Phase Angle ◽  
Radial Distribution ◽  
Phase Distribution ◽  
Distribution Network ◽  
Distribution Networks ◽  
Positive Sequence ◽  
Voltage Measurement ◽  
Distributed Generations ◽  
Fault Currents ◽  
Three Phase

Nowadays, more distributed generations (DGs) are connected to a radial distribution network, so conventional overcurrent relays cannot operate correctly when a fault occurs in the network. This study proposes a method to determine the fault direction in a three-phase distribution network integrated with DGs. The obtained pre-fault and fault currents are utilized to extract their phasors by the fast Fourier transform, and the phase angle difference between the positive-sequence components of the pre-fault and fault currents is used. Moreover, the method only uses the local current measurement to calculate and identify the phase angle change of the fault current without using the voltage measurement. Matlab/Simulink software is used to simulate the three-phase distribution network integrated with DGs. The faults with different resistances are assumed to occur at backward and forward fault locations. The simulation results show that the proposed method correctly determines the fault direction.

Real Time Estimation of Loads in Radial and Unsymmetrical Three-Phase Distribution Networks

2013 ◽  
Vol 28 (4) ◽  
pp. 4839-4848 ◽  
Author(s):  
Izudin Dzafic ◽  
Michel Gilles ◽  
Rabih A. Jabr ◽  
Bikash C. Pal ◽  
Sylvia Henselmeyer
Keyword(s):  
Real Time ◽  
Phase Distribution ◽  
Time Estimation ◽  
Distribution Networks ◽  
Three Phase ◽  
Real Time Estimation

scholarly journals Identification of lines of electric lines of three-phase distribution networks in the composition of ASMAE

2017 ◽  
Vol 25 ◽  
pp. 02010
Author(s):  
Turatbek Omorov ◽  
Beishenaly Takyrbashev ◽  
Kubanychbek Zakiriaev
Keyword(s):  
Phase Distribution ◽  
Distribution Networks ◽  
Three Phase
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