Research on inrush current characteristics of converter transformers

2011 ◽  
Author(s):  
Bin Li ◽  
Xulu Fan ◽  
Shengxiang Zhang ◽  
Zhiqian Bo
Keyword(s):  
Inrush Current ◽  
Current Characteristics

Analysis of zero-mode inrush current characteristics of converter transformers

2021 ◽  
Author(s):  
Zhichang Liu ◽  
Xin Yin ◽  
Yuanlin Pan ◽  
Wei Xi ◽  
Xianggen Yin ◽  
...  
Keyword(s):  
Zero Mode ◽  
Inrush Current ◽  
Current Characteristics

scholarly journals A new scheme of zero-sequence overcurrent protection of converter transformer based on zero-mode inrush current characteristics in station area

2022 ◽  
Vol 8 ◽  
pp. 1257-1263
Author(s):  
Yuanlin Pan ◽  
Zhichang Liu ◽  
Xin Yin ◽  
Wei Xi ◽  
Xianggen Yin ◽  
...  
Keyword(s):  
Zero Mode ◽  
Inrush Current ◽  
Overcurrent Protection ◽  
Zero Sequence ◽  
Current Characteristics

Calculation and Analysis of Transformer Inrush Current Based on Parameters of Transformer and Operating Conditions

1970 ◽  
Vol 109 (3) ◽  
pp. 17-20 ◽  
Author(s):  
M. Jamali ◽  
M. Mirzaie ◽  
S. Asghar-Gholamian
Keyword(s):  
Thermal Stresses ◽  
High Amplitude ◽  
Operating Conditions ◽  
Inrush Current ◽  
Angle Variation ◽  
Proper Actions ◽  
Relay Systems ◽  
Protective Relay ◽  
Protective System ◽  
Current Characteristics

An inrush current is a transient current with high amplitude that may occur when a transformer is energized under no load or lightly loaded conditions. The magnitude of inrush current may be as high as ten times or more times of transformer rated current. This could result in huge mechanical and thermal stresses on transformer in addition to inadvertent operation of the protective relay systems. This paper represents the effects of some factors on the inrush current of transformers. For this purpose, a one-phase transformer is simulated in MATLAB and the effects of switching angle variation, the energizing circuit impedance and the remanent flux on the characteristics of inrush current are investigated. The results show that increasing circuit resistance or switching angle will decrease inrush current amplitude. Also, it is concluded that for reducing inrush current, appropriate switching angle with respect to the remanent flux must be selected. The results can be used for a better understanding of the inrush current characteristics and proper actions of the protective system. Ill. 7, bibl. 13, tabl. 1 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.109.3.162

Study on zero-mode inrush current characteristics and its influence on protection under sympathetic interaction

2022 ◽  
Vol 137 ◽  
pp. 107844
Author(s):  
Yuanlin Pan ◽  
Xin Yin ◽  
Xianggen Yin ◽  
Zhe Zhang ◽  
Lin Jiang ◽  
...  
Keyword(s):  
Zero Mode ◽  
Inrush Current ◽  
Current Characteristics

scholarly journals Shape and Measurement Monitoring of Inrush Current Characteristics of a Battery-Capacitive Energy Storage Device with Two-Channel Digital Oscilloscope

2021 ◽  
Vol 12 (4) ◽  
pp. 286-291
Author(s):  
V. P. Vasilevich ◽  
M. V. Zbyshinskaya
Keyword(s):  
Energy Storage ◽  
Lithium Ion ◽  
Storage Device ◽  
Inrush Current ◽  
Energy Storage Device ◽  
Capacitive Energy Storage ◽  
Digital Oscilloscope ◽  
Measurement Monitoring ◽  
Current Characteristics ◽  
Testing Bench

The main reason of voltage instability in stand-alone power supply systems is the electric drive motors inrush current, which are usually higher than their nominal value. The most reasonable way to solve this problem is using capacitive energy storage. The purpose of research is shape and measurement monitoring of battery-capacitive energy storage device inrush current characteristics. Parameters comparative analysis for lithium-ion battery (LIB) part and capacitive part of the energy storage device was holding with the twochannel digital oscilloscope.Measuring testing bench included parallel connected LIB part and capacitive part of the storage device and connected to the power source. The LIB part of the storage device is made on the basis of the ATOM 10 multifunctional motor drive device of the new generation, which contains 15 V lithium-ion battery and 9.4 A·h capacity. The capacitive part of the storage device is the INSPECTOR Booster supercapacitor with an 80 F electrostatic capacitance and 15.5 V voltage. A 12 V AC/DC step-down converter was used as a power source. An electric air automobile compressor M-14001 was used as a current drain. The testing bench measuring part consisted of a two-channel digital oscilloscope and two standard measuring shunts with 15000 μOm resistance serial attached to LIB part and capacitive part of the storage device. Shape and measurement monitoring of inrush current characteristics of LIB part and capacitive part of the energy storage device was held synchronously using a two-channel digital oscilloscope with recording data to FAT32 file system USB flash drive. Obtained data was transferred to a personal computer and analyzed.The measurement results showed that 82.3 % of the energy losses compensation of the motor start is taken over by the capacitive part of the energy storage device, what makes longer LIB’s life. By adjusting the oscilloscope sweep trace index you can analyze more detailed time response shape and its duration. The values of the inrush current amplitudes were calculated in proportion to the voltage drop on the shunts and their resistances.The developed method for monitoring shape and measurement inrush current characteristics can be used in various technical applications: smart stand-alone photovoltaic system, uninterruptible power supply devices, electric drive control systems, etc.

An Identification Method of Magnetizing Inrush Current Phenomena in Distribution System

2010 ◽  
Vol 130 (4) ◽  
pp. 430-436 ◽  
Author(s):  
Naoki Dou ◽  
Atushi Toyama ◽  
Kohki Satoh ◽  
Tadashi Naitoh ◽  
Kazuyuki Masaki
Keyword(s):  
Distribution System ◽  
Inrush Current ◽  
Identification Method ◽  
Magnetizing Inrush Current
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