Calculation method of short‐circuit current and voltage considering the interaction of different ports in DC system

Autor: Jingyan Liu, Hui Yang, Yan Xu
Rok vydání: 2018
Předmět:
Computer science
020209 energy
power system control
Energy Engineering and Power Technology
transient expressions calculation
Hardware_PERFORMANCEANDRELIABILITY
02 engineering and technology
Fault (power engineering)
transient analytic expressions
Control theory
mathematics computing
0202 electrical engineering
electronic engineering
information engineering
Waveform
single-ended DC system
fault location
multiended DC system
MATLAB
short-circuit current expression
computer.programming_language
computational complexity
MATLAB-Simulink simulation tool
020208 electrical & electronic engineering
General Engineering
DC-DC power convertors
pole-to-pole fault
Expression (mathematics)
short-circuit currents
trees (mathematics)
tree-structured DC system
lcsh:TA1-2040
short-circuit voltage expression
Transient (oscillation)
Current (fluid)
lcsh:Engineering (General). Civil engineering (General)
computer
Short circuit
Software
Voltage
Zdroj: The Journal of Engineering (2019)
ISSN: 2051-3305
DOI: 10.1049/joe.2018.8384
Popis: The characteristics of the pole-to-pole fault in the tree-structured DC system are complicated, and the transient analytic expressions of high-order current and voltage can make the calculation difficulty increase significantly. In response to this phenomenon, on the one hand, when the parameters are the same, the impact of the changes of the number about the terminals on the waveform is considered. On the other hand, when the number of terminals is fixed, the influence of the change of the parameter on the waveform is studied. Taking the interaction between different ports into account, correct the short-circuit current and voltage expression of single-ended DC system and the calculation method of short-circuit current and voltage expression for multi-ended DC system is proposed. This method can reduce the computational complexity of transient expression for multi-ended DC system. The calculation results are verified by MATLAB/Simulink simulation tool. The calculated transient expressions of voltage and current are in good agreement with the results of simulation, which provide the theoretical basis for the fault location and calculation of setting value.
Databáze: OpenAIRE
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