Technical analysis and prevention for unit tripping caused by electromagnetic eddy current

Abstract

Abstract:

Due to the unreasonable installation position, the metal cable tray is in severe electromagnetic field of the generator for long time. The electromagnetic eddy current heats the metal tray, and finally the insulation performance of the secondary cable in the metal trough box will be reduced, which leads to relay protection malfunction and unit tripping event. Conduct technical analysis on such accidents, and carry out selfchecking and rectification from the equipment design, material selection, installation, commissioning and operation. Heating fault caused by eddy currentsshould be handled properly as early as possible to avoid such faults and ensure the reliability of power supply.

Key words:

electromagnetic eddy current, cable tray, secondary cable, relay protection, insulation

DU Xilai.

Technical analysis and prevention for unit tripping caused by electromagnetic eddy current

[J]. Huadian Technology, 2018, 40(10): 54-55.

[1]	HUANG Weihao, LU Yongyin, LUO Qifeng, FAN Dehe, YUAN Tuolai, YAN Chao. A positioning method for pressure plates of automatic relay protection devices based on Hough transform [J]. Huadian Technology, 2021, 43(8): 61-66.
[2]	XING Wu，GUO Xiao，WANG Zhe，SHI Bolun. Application of parameter identification principle in the protection of magnetic shunt reactor [J]. Huadian Technology, 2020, 42(6): 47-51.
[3]	YUE Feng，SHI Zhiwei，DONG Jincai，MOU Jinli. Reliability design and test for relay protection devices applied in smart grid [J]. Huadian Technology, 2020, 42(2): 50-57.
[4]	GUO Xiaoning，YIN Jianlun，PANG Jiefeng，CUI Longwei，WANG Qunwei，WEI Xin. Design and implementation of a universal display terminal for protection devices [J]. Huadian Technology, 2019, 41(10): 35-38.
[5]	ZHAO Qian1,2, ZOU Lei1,2, CHEN Fufeng1,2, XUE Mingjun1,2, GONG Shimin1,2, LI Yuping1,2. Interval integration design for in situ relay protection of transformer substation [J]. Huadian Technology, 2017, 39(9): 1-5.
[6]	CHEN Qi1,2, CHEN Fufeng1,2, ZHANG Yao1,2, WANG Yongxu1,2, TANG Zhiguo1,2. Local distributed busbar protection ability analysis [J]. Huadian Technology, 2017, 39(6): 6-9.
[7]	YAN Tao, HE Shengli. Thermal power project cable and cable tray settlement method study [J]. Huadian Technology, 2016, 38(12): 12-14.
[8]	TAN Ling1，YANG Depei2，LI Yanxin1，LUAN Qingwu1，LI Xiaobo1. Study of break failure protection and CT failure based on substation area relay protection [J]. Huadian Technology, 2015, 37(8): 19-21.
[9]	YAO Liang, CHEN Shi, ZHANG Yonggang. Design and application of newtype automatic test system of relay protection equipments [J]. Huadian Technology, 2015, 37(1): 19-21.
[10]	HU Sen, ZHANG Lei, CHENG Lei, YANG Fei. Engineering application of low resistance grounding system of current collection line in wind farm [J]. Huadian Technology, 2014, 36(9): 73-76.
[11]	WU Chaobo, FENG Xin. Analysis on influence of electric braking on negative sequence overload protection [J]. Huadian Technology, 2014, 36(8): 55-56.
[12]	LI Feng, LIU Haixia. Analysis on reasons of rotor singlepoint grounding fault and treatment measures [J]. Huadian Technology, 2013, 35(8): 41-42.
[13]	ZHOU Yu. Analysis on experience of response to bad weather and keeping stable operation of unit [J]. Huadian Technology, 2013, 35(8): 57-60.
[14]	SHU Yishi, GUAN Xiao, ZHAO Wei. Influence of connection of distributed photovoltaic power stations into power grid on relay protection of power distribution grid [J]. Huadian Technology, 2013, 35(7): 70-71.
[15]	FU Junjie，DU Xilai. Operation mode of power units of Togtoh Power Generation Company Limited under extreme weather [J]. Huadian Technology, 2013, 35(10): 1-5.

Technical analysis and prevention for unit tripping caused by electromagnetic eddy current

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments