Study on sweep frequency impedance method for detecting internal winding short circuit fault in power transformer

2014 ◽  
Author(s):  
Yong Liu ◽  
Fan Yang ◽  
Xiaochen Liang ◽  
Shengchang Ji ◽  
Xiang Sun ◽  
...  
Keyword(s):  
Power Transformer ◽  
Short Circuit ◽  
Impedance Method ◽  
Sweep Frequency ◽  
Short Circuit Fault

scholarly journals An Experimental Study of the Sweep Frequency Impedance Method on the Winding Deformation of an Onsite Power Transformer

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3511
Author(s):  
Song Wang ◽  
Shuang Wang ◽  
Ying Cui ◽  
Jie Long ◽  
Fuqiang Ren ◽  
...  
Keyword(s):  
Power Transformer ◽  
Early Stage ◽  
Short Circuit ◽  
Experimental Tests ◽  
Open Circuit ◽  
Impedance Method ◽  
Electrical Networks ◽  
Sweep Frequency ◽  
Transformer Winding ◽  
A New Technique

Power transformers are one of the most important devices in electrical networks. The safety operation of the transformers directly affects the reliability of the power system. To diagnose the internal deformation of the transformer as soon as possible is of great significance. As a new technique, sweep frequency impedance (SFI) method has been used to detect the short-circuit fault of the transformer winding. However, the SFI method is still in the early stage and more experimental tests are needed to further demonstrate its accuracy in the detection of other types of winding faults. Therefore, in this paper, the SFI method is investigated to diagnose an open-circuit fault of an onsite transformer. By deeply analyzing the SFI curves and SFI values at power frequency obtained by the SFI test, the open-circuit fault of this transformer winding is determined. Meanwhile, the accuracy of the diagnostic results based on the SFI method is validated by introducing the results of the short-circuit impedance (SCI) and winding resistance measurements. The application of the SFI method on the detection of the open-circuit fault within the transformer winding not only enrich the SFI method research but also provide valuable practical guidance significance for the fault detection.

Dynamic Deformation Analysis of Power Transformer Windings in Short-Circuit Fault by FEM

2014 ◽  
Vol 24 (3) ◽  
pp. 1-4 ◽  
Author(s):  
Haijun Zhang ◽  
Bin Yang ◽  
Weijie Xu ◽  
Shuhong Wang ◽  
Guolin Wang ◽  
...  
Keyword(s):  
Dynamic Deformation ◽  
Power Transformer ◽  
Short Circuit ◽  
Deformation Analysis ◽  
Short Circuit Fault

scholarly journals The effect of short circuit fault on one winding to other windings in FRA

2019 ◽  
Vol 10 (2) ◽  
pp. 585
Author(s):  
N. F. M. Yasid ◽  
M. F. M. Yousof ◽  
R. Abd. Rahman ◽  
H. Zainuddin ◽  
S. A. Ghani
Keyword(s):  
Power Systems ◽  
Power Transformer ◽  
Short Circuit ◽  
Response Analysis ◽  
Frequency Response Analysis ◽  
Mechanical Reliability ◽  
Monitoring And Diagnosis ◽  
Short Circuit Fault ◽  
Sensitive Method ◽  
Measured Phase

Monitoring and diagnosis of power transformer in power systems have been examined and debated significantly in last few decades. Recently, more researchers have expressed their interest in these issues as the utilities and network operators operating under a rising cost-effecting pressure. Especially, in studying to monitor winding faults which is found to be the most common fault within transformers. This paper addresses the issue of the effect of inter-windings short circuit fault in a Dyn11 connected transformer. The specific aim is to study the effect of fault at winding of other phases to the response of measured phase. Frequency Response Analysis (FRA) which is discovered to be a powerful and sensitive method to examine and evaluate the condition, including the mechanical reliability of the transformer windings is used.

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