A monitoring scheme for inter-turn short circuit of field windings in synchronous machines and its sensitivity analysis

被引：1

作者：

机构：

[1] School of Electrical Engineering, Beijing Jiaotong University

[2] Department of Electrical Engineering, Tsinghua University

[3] State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments, Tsinghua University

[4] NARI-Relays Electric Co. Ltd.

来源：

Hao, L. (llhao@bjtu.edu.cn) | 1600年 / Automation of Electric Power Systems Press卷 / 37期

关键词：

Field windings; Inter-turn short circuit; Monitoring; Sensitivity; Synchronous generator; Unbalanced current;

D O I：

10.7500/AEPS201212225

中图分类号：

学科分类号：

摘要：

The monitoring principle of field windings inter-turn short circuits based on the unbalanced current root mean square (RMS) value in the main protection overcomes defects of the fault monitoring using the single harmonic detections, and can maximize the fault characteristics information extracted. The sensitivities of the Three Gorges and Pengshui generators are analyzed through simulations. Factors affecting their sensitivities are analyzed with respect to measured data. Based on the analysis, a monitoring scheme considering influences of natural unbalanced currents is proposed. Through phase shift and superposition of the unbalanced current, non-fault characteristic components in the steady-state unbalanced current can be eliminated to further improve the monitoring sensitivities. Anti-malfunctioning measures, a two-segment value setting principle and floating threshold operation characteristics are discussed. An on-line monitoring device manufactured based on the scheme has already been applied in Zhejiang Xin'anjiang Hydropower Station. © 2013 State Grid Electric Power Research Institute Press.

引用

页码：120 / 127

页数：7

共 17 条

[1]

(2008)

[2]

Xue X., Analysis and processing of rotor inter-turn short circuit of 600 MW generator, East China Electric Power, 29, 8, pp. 28-29, (2001)

[3]

Tang F., Xu Y., Diagnosis and treatment of turn-to-turn short circuit fault for generator rotor in Qinshan No.2 nuclear power station, Electrical Equipment, 6, 1, pp. 67-69, (2005)

[4]

Yang S., Diagnosis and treatment of turn-to-turn short circuit fault for generator rotor in Danjiangkou power station, Yunnan Water Power, 23, 2, pp. 95-97, (2005)

[5]

Wood J.W., Rotor winding short detection, IEE Proceedings-C, 133, 3, pp. 30-35, (1986)

[6]

Ei-Sharkawi M.A., Marks R.J., Oh S., Et al., Localization of winding shorts using fuzzified neural networks, IEEE Trans on Energy Conversion, 10, 1, pp. 140-143, (1995)

[7]

(2005)

[8]

Stoll R.L., Hennache A., Method of detecting and modeling presence of shorted turns in dc field winding of cylindrical rotor synchronous machines using two air-gap search coils, IEE Electric Power Applications, 135, 6, pp. 281-294, (1988)

[9]

Trutt F.C., Sottile J., Kohler J.L., Detection of AC machine winding deterioration using electrically excited vibrations, IEEE Trans on Industry Applications, 37, 1, pp. 10-14, (2001)

[10]

Sottile J., Trutt F.C., Leedy A.W., Condition monitoring of brushless three-phase synchronous generators with stator winding or rotor circuit deterioration, IEEE Trans on Industry Applications, 42, 5, pp. 1209-1215, (2006)

← 1 2 →