An improved single-terminal fault location method for inverter grid-connected system based on active control

•A single-terminal fault location method for inverter-interfaced system that is less influenced by fault resistance and system parameters.•Compared to traditional single-terminal fault location method, the proposed method does not require the assumption about the phase-angle of sequence impedance.•B...

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Vydáno v:Electric power systems research Ročník 217; s. 109100
Hlavní autoři: Song, Guobing, Chang, Peng, Hou, Junjie, Xiong, Fuzhi
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier B.V 01.04.2023
Témata:
Active control
Inverter grid-connected system
Non-iterative algorithm
Single-terminal fault location
Non-iterative algorithm
Single-terminal fault location
Active control
Inverter grid-connected system
ISSN:0378-7796, 1873-2046
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Shrnutí:•A single-terminal fault location method for inverter-interfaced system that is less influenced by fault resistance and system parameters.•Compared to traditional single-terminal fault location method, the proposed method does not require the assumption about the phase-angle of sequence impedance.•Both symmetrical and asymmetries faults can be solved by the method.•A single-terminal fault location method that needs a small amount of calculation. Single-terminal fault location methods are easily affected by fault resistance and system parameters, and they always utilize iterative algorithm to solve fault distance. To improve their performance, an improved single-terminal fault location method for inverter system based on active control is proposed in this article, which can be used for symmetrical and asymmetrical faults. First, the problem that influences the performance of fault location method is analyzed. And to solve it, a control strategy that can create two fault statuses during fault stage is proposed. Then, using the electrical quantities under the different fault stages, two irrelevant equation groups can be established, and fault distance can be solved by single-terminal data. The PSCAD/EMTDC results demonstrate that the method can achieve fault location accurately, which just requires a small amount of calculation. And it is less affected by fault resistance and system parameters.
ISSN:0378-7796
1873-2046
DOI:10.1016/j.epsr.2022.109100