标题：Longitudinal protection based on phase trajectory of fault component instantaneous power
作者：Liu, Shiming ;Zhu, Xisong ;Zhang, Yuhao ;Zhao, Guochao ;Wu, Jukun
作者机构：[Liu, Shiming ;Zhu, Xisong ;Zhao, Guochao ;Wu, Jukun ] Key Laboratory of System Intelligent Dispatch and Control, Shandong University, Jinan, China;[Z 更多
会议名称：13th IEEE International Conference on Compatibility, Power Electronics and Power Engineering, CPE-POWERENG 2019
会议日期：23 April 2019 through 25 April 2019
来源：Proceedings - 2019 IEEE 13th International Conference on Compatibility, Power Electronics and Power Engineering, CPE-POWERENG 2019
关键词：Instantaneous power phase space; Self-synchronization; Synchronization error
摘要：Active power differential protection has advantages in eliminating the influence of reactive power factors and identifying high-resistance faults, and the data self-synchronization method can eliminate the synchronization error. Power differential protection based on data self-synchronization method combines the advantages of both, but the protection speed needs to be improved. Based on phase space theory, this paper constructs the phase space of fault component instantaneous power and analyzes its characteristics. Longitudinal protection based on the phase trajectory of fault component instantaneous power is proposed, which identifies faults by the center position of the trajectory. The simulations of the IEEE 9-node system shows that the protection has a faster speed and can correctly identify faults in various synchronization exception scenarios. © 2019 IEEE.