Research on Online Assessment of Switch Resistance Based on Real-time Current Measurement

Jiankun Liu, Jing Bu, Qian Zhou, Chenggen Wang, Yang Hou, Minghui Yin
2014 Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering   unpublished
The evaluation of switch resistance has aroused widespread concern.To assess the resistance of switchgear in switching substations which use 3/2 wiring, online assessment method based on real-time current measurements is proposed in this paper. The method use Kirchhoff's law to establish the mathematical model of switching substations which use 3/2 wiring. It calculates the resistance of switchgear as finding solutions of non-homogeneous linear equations.The minimum number of current to be
more » ... current to be measured is determined by these equations. We can get a lot of current conditions in real-time from the current transformer.We can derive the required current conditions to establishe the model so we can get the answer. Finally, this article uses operating data of a 500kV substation to calculate the resistance of switchgear. The simulation results reflect the effectiveness of the algorithm Comparing with the traditional method, this method is easier and more accurate.S0 an effective way is provided To assess the switch resistance Keywordsonline assessment; Real-time Current ; switch resistance; power system; 3/2 wiring I.
doi:10.2991/meic-14.2014.13 fatcat:jljkuqxeh5dkpdn3duowlimola