Optimal Injection Current Calculation and Implementation of Flexible Grounding Device for Suppressing Ferromagnetic Resonance

被引：0
|
作者：
Lu P. [1 ]
Wang W. [1 ]
Liu P. [2 ]
Liu Q. [1 ]
Zeng X. [1 ]
Li J. [3 ]
机构：
[1] School of Electrical & Information Engineering, Changsha University of Science and Technology, Hunan Province, Changsha
[2] State Grid Hunan Electric Power Co., Ltd., Yongzhou Power Supply Branch, Hunan Province, Yongzhou
[3] Hunan Provincial Key Laboratory for Control Technology of Distributed Electric Propulsion Aircraft, Hunan Province, Changde
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 04期
基金：
中国国家自然科学基金;
关键词：
distribution network; electromagnetic voltage transformer; grounding device; optimal ferromagnetic resonance suppression;
D O I：
10.13334/j.0258-8013.pcsee.212523
中图分类号：
学科分类号：
摘要：
The flexible grounding device realizes zero-sequence energy discharge by injecting current into the neutral point of the distribution network, which is an effective mean of suppressing ferromagnetic resonance. Aiming at the problem of different selection criteria for harmonic elimination currents of existing flexible grounding devices, this paper proposes a method for calculating and implementing the best harmonic elimination current. By analyzing the equivalent circuit of the single-phase grounding fault distribution network at the moment of fault removal, the transfer function model of the system is obtained, and the conclusion that the damping vibration system consumes the fastest energy in the critical resistance state is used to calculate the fastest suppression of ferromagnetic resonance harmonic elimination resistance value, and then obtain the best harmonic elimination current of the flexible grounding device. Aiming at the problem of ferromagnetic resonance overvoltage caused by single-phase grounding fault, the realization process and control method of the flexible grounding device injecting the best harmonic elimination current are described. Simulation and experimental results show that the proposed method can deplete the resonance energy in a short time so that the system is out of resonance and achieve the effect of quickly suppressing the ferromagnetic resonance overvoltage. ©2023 Chin.Soc.for Elec.Eng.
引用
收藏
页码：1438 / 1448
页数：10
相关论文
共 21 条
  • [1] JAZEBI S，, FARAZMAND A, MURALI B P, A comparative study on π and T equivalent models for the analysis of transformer ferroresonance[J], IEEE Transactions on Power Deliver, 28, 1, pp. 526-528, (2013)
  • [2] SHI Wenjiang, LI Chunping, WANG Rui, Typical characteristics of ferroresonance in dispatching center[J], Automation of Electric Power Systems, 39, 7, pp. 194-197, (2015)
  • [3] LIN Li, HE Yue, WANG Junbing, Mechanism of potential transformer damaged in ungrounded neutral power system[J], High Voltage Engineering, 39, 5, pp. 1114-1120, (2013)
  • [4] Zheng QI, LI Hongyi, Research on multi-PT ferroresonance in island microgrid[J], Power System Protection and Control, 47, 22, pp. 52-58, (2019)
  • [5] LIN Li, WANG Junbing, Simulation and computational analysis on potential transformer damage in 10kV system[J], Power System Protection and Control, 40, 17, pp. 51-55, (2012)
  • [6] JI Jie, HUANG Jianqiong, MA Jintao, Analysis on dividing frequency Ferro-resonance caused by stator grounding protection action[J], Automation of Electric Power Systems, 38, 16, pp. 132-135, (2014)
  • [7] RADMANESH H, GHAREHPETIAN G B, Ferroresonance suppression in power transformers using chaos theory[J], International Journal of Electrical Power & Energy Systems, 45, 1, pp. 1-9, (2013)
  • [8] ZHOU Hao, YU Yuhong, ZHANG Liting, Comparative study on ferroresonance elimination measures in l0kV power distribution system by simulation method[J], Power System Technology, 29, 22, pp. 24-34, (2005)
  • [9] MEI Chenglin, ZHANG Chaoshu, Analysis of voltage transformer ferroresonance[J], Power System Technology, 32, S2, pp. 311-313, (2008)
  • [10] LIANG Zhirui, ZHAO Mengya, NIU Shengsuo, Defects of measures against PT fuse melting in distribution network and research of new measure[J], Electric Power Automation Equipment, 36, 9, pp. 17-24, (2016)
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