Application of a correction current injection power flow algorithm to an unbalanced 4-wire distribution network incorporating TN-C-S earthing

2013 ◽  
Author(s):  
Keith Sunderland ◽  
Massimiliano Coppo ◽  
Michael F. Conlon ◽  
Roberto Turri
Keyword(s):  
Power Flow ◽  
Distribution Network ◽  
Current Injection ◽  
Flow Algorithm ◽  
Injection Power

Flexible Power Flow Algorithm for Distribution Network Including Second-Order Items

2014 ◽  
Vol 521 ◽  
pp. 440-443 ◽  
Author(s):  
Ning Zhou ◽  
Ru Si Chen ◽  
Tao Lin ◽  
Qiang Li ◽  
Xiang He ◽  
...  
Keyword(s):  
Distribution System ◽  
Network Flow ◽  
Power Flow ◽  
Distribution Network ◽  
Static Characteristic ◽  
Second Order ◽  
Electric Power System ◽  
Flow Equations ◽  
Good Convergence ◽  
Flow Algorithm

For intelligent distribution system including Distributed Generations, we take the generator and load static characteristic into account and propose a flexible power flow algorithm for distribution network including second-order items. First, this algorithm modifies the distribution network power flow equations including second-order items in order to meet the static characteristic of generator and load. Moreover, we use the fsolve function of MATLAB to solve the power flow equations. This algorithm makes full use of the characteristic of high accuracy of the distribution network flow equations including second-order items and good convergence of the fsolve function. Compared with conventional distribution power flow algorithm, it does not need to set the trend flexible node type of each one. Not only the voltage amplitude, phase information of each node and the system frequency information can be calculated, as well as the actual power of generator and loads. The result of the algorithm is more in line with the practical electric power system engineering. Improved IEEE33 node system is chosen to verify the correctness of the algorithm.

scholarly journals Current injection-based Newton–Raphson power-flow algorithm for droop-based islanded microgrids

2019 ◽  
Vol 13 (23) ◽  
pp. 5271-5283 ◽  
Author(s):  
Abhishek Kumar ◽  
Bablesh Kumar Jha ◽  
Devender Singh ◽  
Rakesh Kumar Misra
Keyword(s):  
Power Flow ◽  
Current Injection ◽  
Flow Algorithm ◽  
Newton Raphson

Three phase asymmetrical power flow algorithm using current injection technique

2016 ◽  
Author(s):  
A. P. S. G. De Vas Gunawardena ◽  
N. T. Ranatunga ◽  
L. L. Samarathunga ◽  
S. D. T. Weerawansha ◽  
U. Jayatunga
Keyword(s):  
Power Flow ◽  
Current Injection ◽  
Injection Technique ◽  
Three Phase ◽  
Flow Algorithm ◽  
Asymmetrical Power

Microgrid Protection Based on Specific Current Injection

2013 ◽  
Vol 805-806 ◽  
pp. 1082-1086
Author(s):  
Jun Li ◽  
Zhi Fei Chen ◽  
Jun Xia Qian ◽  
Hui Gang Zhang
Keyword(s):  
Power Flow ◽  
Short Circuit ◽  
Distribution Network ◽  
Short Circuit Current ◽  
Current Injection ◽  
Harmonic Current ◽  
Matlab Simulink ◽  
Injection Method ◽  
Protection Scheme ◽  
Fault Type

Considering that microgrid (MG) can be controlled flexibly, its short circuit-current is limited and power flow is bidirectional. The paper presents a new relay protection scheme of microgrid based specific harmonic injection method. The injective harmonic flows all over microgrid and the amplitude of specific harmonic current will enhance in fault occasion. So the above characteristic can solve the problem of fault position and the symmetric characteristic can complete the identification of fault type. The discussion about the compatibility of microgrid protection and conventional distribution network line protection. At last, the combined microgrid model is built in Matlab/Simulink environment. The simulation result demonstrated that the above method can complete the identification of fault position and type and it also can coordinate with the traditional line protection well.

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