Voltage sag evaluation in unbalanced three-phase distribution network with distributed generations

2015 ◽  
Author(s):  
Dongli Jia ◽  
Lijuan Hu ◽  
Kaiyuan He ◽  
Keyan Liu ◽  
Wanxing Sheng ◽  
...  
Keyword(s):  
Phase Distribution ◽  
Distribution Network ◽  
Voltage Sag ◽  
Distributed Generations ◽  
Three Phase

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.

Stochastic multi-objective optimization of photovoltaics integrated three-phase distribution network based on dynamic scenarios

2018 ◽  
Vol 231 ◽  
pp. 985-996 ◽  
Author(s):  
Jian Xu ◽  
Jing Wang ◽  
Siyang Liao ◽  
Yuanzhang Sun ◽  
Deping Ke ◽  
...  
Keyword(s):  
Phase Distribution ◽  
Distribution Network ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Three Phase
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