Analysis on transformer balance winding fault of an aircooled power plant and treatment

Abstract

Abstract:

Abstract:The function of transformer balance winding was introduced. An infrequent short circuit fault of transformer balance winding was introduced. The transformer is installed in an aircooled power plant and connected in mode of Yyn0+d, and the short circuit fault of its balance winding had caused the differential protection to trip. A new fast method was adopted for transformation and calculation of first and second currents of the transformer. The fault position can be determined correctly by the new method, which provides a base for the fault treatment.

Key words: Key words:transformer, balance winding, differential protection, simplified analysis on short circuit fault

LI Zecai, CHENG Zhongyue, LI Xirong, PAN Lehong, YUAN Lancheng. Analysis on transformer balance winding fault of an aircooled power plant and treatment[J]. Huadian Technology, 2013, 35(7): 53-55.

[1]	FENG Guangjie，WANG Zhiyong，YAN Zhihui，HU Shasha，WANG Zhiwei，XIAO Feng. An improvement scheme for busbar differential protection logic applied in singlesectionalized doublebusbar connection mode [J]. Huadian Technology, 2020, 42(1): 45-49.
[2]	ZHANG Yonggang1, 2，WANG Yue3，YAO Liang1, 2，CHEN Qi1, 2. Research on a differential current protection device for Tconnection lines [J]. Huadian Technology, 2019, 41(2): 18-21.
[3]	DU Xilai. Ground point principle and case analysis of current transformer [J]. Huadian Technology, 2018, 40(8): 31-33.
[4]	QI Jie. Fault analysis of a 600MW hydrogenerator stator winding damage [J]. Huadian Technology, 2018, 40(12): 16-19.
[5]	XUE Mingjun1,2, WANG Yuting1,2, CHEN Fufeng1,2, ZOU Lei1,2, ZHANG Xiang1,2, CHEN Shi1,2. Influence of series compensated double circuits on the same tower zerosequence component to relay protection [J]. Huadian Technology, 2017, 39(9): 6-9.
[6]	KANG Feng，WANG Runyi，ZHANG Wei，LIU Qinghai，YANG Qingsong. The design and implementation of differential protection based on current differential harmonic content [J]. Huadian Technology, 2017, 39(7): 32-35.
[7]	TANG Zhiguo,ZHOU Xiaobo,CHEN Qi,WANG Yongxu,CHEN Hongyan. Busbar abnormal great number detection method based on virtual difference current technology [J]. Huadian Technology, 2017, 39(4): 1-3.
[8]	ZHANG Yanlin, WANG Peng, HAN Yingjie, FAN Yusheng, LIU Zheng. A study of differential protection of variablefrequency motor and its applications [J]. Huadian Technology, 2017, 39(4): 8-10.
[9]	HU Bing, GUO Xiao, CHEN Shi, XING Wu, WANG Zhe. Differential protection research of voltage regulating transformer of rectifier unit and its application [J]. Huadian Technology, 2017, 39(1): 14-17.
[10]	WANG Song1, WU Pengyue2, SUN Ganghu2, WANG Zhigao1, GAN Jianghua3. Analysis on fault of loose connection of terminals in secondary circuit of current transformer [J]. Huadian Technology, 2015, 37(4): 19-21.
[11]	LIAO Hongtao. Analysis on false action of main transformer differential protection responding outside area fault caused by twopoint grounding of secondary current circuit [J]. Huadian Technology, 2015, 37(1): 55-57.
[12]	WEN Tao. Test program of differential protection for generator and transformer of AP1000 nuclear power unit [J]. Huadian Technology, 2014, 36(4): 73-76.
[13]	LIN Xiguo. Application of soft starter in reformation project of merging of induced draft fan and boost fan into one [J]. Huadian Technology, 2014, 36(3): 37-39.
[14]	YANG Yuzhu. Analysis on reason of incorrect trip of differential protection of electrostatic precipitator transformer and improvement measures [J]. Huadian Technology, 2014, 36(3): 41-42.
[15]	ZHOU Huanrong, XU Yongsheng, HU Liangsheng. Application scheme of differential protection of noninteger points phaseshift transformer [J]. Huadian Technology, 2014, 36(10): 43-45.

Analysis on transformer balance winding fault of an aircooled power plant and treatment

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments