New fault diagnosis method for stator winding interturn short circuit in synchronous condensers

被引：0

作者：

Ma H.-Z. ^{[1
]}

Jiang M.-Y. ^{[1
]}

Li C.-Y. ^{[1
]}

Chen Z.-F. ^{[1
]}

Tang X.-Z. ^{[2
]}

机构：

[1] College of Energy and Electrical Engineering, Hohai University, Nanjing

[2] Maintenance Branch Company of the State Grid Jiangsu Electric Power Co., Ltd., Nanjing

来源：

Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2021年 / 25卷 / 09期

关键词：

Branch current; Fault diagnosis; Phase angle difference; Stator inter-turn short-circuit; Synchronous condenser; Synchronous inductance;

D O I：

10.15938/j.emc.2021.09.005

中图分类号：

学科分类号：

摘要：

Due to the short operation time of the synchronous condensers in the power grid, there are few research on its fault characteristics and diagnosis method. Therefore, a fault diagnosis method based on the phase-angle of branch current was proposed. The mutual inductance between the fault windings and the non-fault windings of the same branch and other non-fault windings after the stator winding inter-turn short circuit fault was fully considered in this method, and the phase-angle between the branch currents of the fault phase was deduced theoretically on this basis. Taking a TTS-300-2 type synchronous condenser as an example, the stator winding interturn short-circuit field coupling simulation model was established by using the finite element platform. The results show that when the stator winding short-circuit fault occurs, the phase-angle between the branch currents of fault phase will increase obviously. This phase-angle augments with the deepening of the fault severity. The features are little affected by the change of fault location and reactive power. Therefore, the phase-angle of branch currents can be used as an effective basis for diagnosing the fault of interturn short-circuit of stator winding of synchronous condensers. © 2021, Harbin University of Science and Technology Publication. All right reserved.

引用

下载

页码：35 / 45

页数：10

共 32 条

[1] WANG Qiang, LI Tianran, TANG Xiaobo, Et al., Method of site selection for synchronous condenser responding to commutation failures of multi-infeed DC system, Automation of Electric Power Systems, 43, 1, (2019)
[2] LI Hui, WANG Zhen, ZHOU Ting, Et al., Multi-mode coordinated control strategy for DC receiving converter station with synchronous condenser under full operating conditions, Transactions of China Electrotechnical Society, 35, 17, (2020)
[3] CHANG Haijun, HUO Chao, LIU Fusuo, Et al., Research on optimal allocation method of synchronous condensers for improving transient voltage stability level of weak sending-end power grid [J], Power System Protection and Control, 47, 6, (2019)
[4] CHENG Ming, TIAN Weijie, WANG Wei, Et al., Review on key technologies and latest development of new synchronous condenser, Electric Power Engineering Technology, 39, 2, (2020)
[5] LIU Chunhui, QIAN Wenxiao, YANG Pengwei, Et al., Loss-of-excitation operation of new generation 300 Mvar synchronous condenser and its relay protection, Electric Power Engineering Technology, 38, 6, (2019)
[6] ZHU Erhang, HUANG Hao, BIAN Xu, Et al., Research on calculation and decrease of eddy current losses in stator clamping ring for a large synchronous condenser, Electric Machines and Control, 23, 10, (2019)
[7] MA Minghan, JIANG Meng, LI Yonggang, Et al., Research on fault diagnosis method of turn to turn short circuit in rotor winding of large-scale dual water internal cooling condenser, Electric Machines and Control, 25, 2, (2021)
[8] SANG Jianbin, BAO Minglei, LI Yuping, Et al., Analysis and improvement of relay protection of 300 MVar synchronous condenser, Electric Power Automation Equipment, 39, 6, (2019)
[9] GUI Lin, ZHAO Binchao, WANG Guang, Et al., Internal fault analysis and optimization design of main protection scheme for shanghai electric phase modifier, Electric Power, 50, 12, (2017)
[10] He Yuling, Zhang Wen, Zhang Yuyang, Et al., Effect of Stator inter-turn short circuit on winding electromagnetic forces in generators, Transactions of China Electrotechnical Society, 35, 13, (2020)

← 1 2 3 4 →