本文選題：轉(zhuǎn)子匝間短路　切入點(diǎn)：場(chǎng)路耦合　出處：《華北電力大學(xué)》2017年碩士論文

【摘要】：轉(zhuǎn)子匝間短路故障是汽輪發(fā)電機(jī)常見故障之一,早期的準(zhǔn)確檢測(cè)對(duì)電力系統(tǒng)的安全穩(wěn)定運(yùn)行具有重要意義。發(fā)生轉(zhuǎn)子匝間短路后,轉(zhuǎn)子繞組有效匝數(shù)減少,磁動(dòng)勢(shì)相對(duì)減小且波形發(fā)生畸變,導(dǎo)致氣隙磁場(chǎng)的畸變,從而發(fā)電機(jī)運(yùn)行參數(shù)發(fā)生變化。為滿足供電要求,發(fā)電機(jī)勵(lì)磁系統(tǒng)的自動(dòng)調(diào)節(jié)作用,勵(lì)磁電流發(fā)生變化,各種故障特征量也會(huì)隨之發(fā)生變化,影響故障監(jiān)測(cè)和診斷的準(zhǔn)確性,所使用檢測(cè)方法的自身缺陷也會(huì)對(duì)故障監(jiān)測(cè)與診斷造成一定影響。因此,各故障特征量變化的準(zhǔn)確分析和新檢測(cè)方法的提出,有利于提高轉(zhuǎn)子匝間短路故障監(jiān)測(cè)與診斷的準(zhǔn)確性,對(duì)發(fā)電機(jī)的正常運(yùn)行具有重大意義。本文主要工作如下:(1)以QFSN300-2型汽輪發(fā)電機(jī)為研究對(duì)象,利用Ansoft-Maxwell、Ansoft-Simplorer和Matlab-Simulink多軟件聯(lián)合,建立了基于場(chǎng)路耦合的汽輪發(fā)電機(jī)的仿真模型,并驗(yàn)證了模型的正確性。(2)分析了不同勵(lì)磁模式下轉(zhuǎn)子匝間短路時(shí)各故障特征量的變化規(guī)律。以恒勵(lì)磁電流和恒勵(lì)磁電壓兩種典型勵(lì)磁模式為例,從磁場(chǎng)、基本電氣量及電磁轉(zhuǎn)矩的角度,分別計(jì)算和分析了聯(lián)網(wǎng)下轉(zhuǎn)子繞組匝間短路故障的基本特征,為自動(dòng)勵(lì)磁調(diào)節(jié)系統(tǒng)下發(fā)電機(jī)發(fā)生轉(zhuǎn)子匝間短路奠定了研究基礎(chǔ)。(3)提出了一種新型檢測(cè)線圈法:U型檢測(cè)線圈法。利用所建300MW汽輪發(fā)電機(jī)的仿真模型,且在發(fā)電機(jī)的定子鐵芯處安裝U型檢測(cè)線圈。在空載和額定負(fù)載工況下,分別進(jìn)行不同程度的轉(zhuǎn)子匝間短路故障仿真,得到了流過U型檢測(cè)線圈的磁通量和其感應(yīng)電壓的變化規(guī)律,從中發(fā)現(xiàn),此種檢測(cè)線圈法實(shí)用性較高,可作為轉(zhuǎn)子匝間短路故障的診斷方法。
[Abstract]:Rotor inter-turn short circuit fault is one of the common faults of turbogenerator. Early accurate detection is of great significance to the safe and stable operation of power system.After the short circuit between turns of the rotor, the effective number of turns in the rotor winding is reduced, the magnetic EMF is relatively reduced and the waveform is distorted, which leads to the distortion of the air gap magnetic field, and the operation parameters of the generator change.In order to meet the demand of power supply, the automatic regulation of generator excitation system, the change of excitation current, and the variation of various fault characteristics will affect the accuracy of fault monitoring and diagnosis.The defects of the detection method can also affect the fault detection and diagnosis.Therefore, the accurate analysis of the variation of each fault characteristic quantity and the new detection method are helpful to improve the accuracy of rotor inter-turn short circuit fault monitoring and diagnosis, and are of great significance to the normal operation of the generator.The main work of this paper is as follows: (1) taking QFSN300-2 turbogenerator as the research object, the simulation model of turbogenerator based on field coupling is established by using Ansoft-Maxwell Ansoft-Simplorer and Matlab-Simulink software.The correctness of the model is verified. (2) the variation law of each fault characteristic quantity in rotor inter-turn short circuit under different excitation modes is analyzed.Taking two typical excitation modes of constant excitation current and constant excitation voltage as examples, the basic characteristics of inter-turn short circuit fault of rotor windings under interconnection are calculated and analyzed from the angles of magnetic field, basic electrical quantity and electromagnetic torque, respectively.In this paper, a new detection coil method is proposed, which lays a foundation for the research of rotor inter-turn short circuit of generator under automatic excitation regulation system.Using the simulation model of the 300MW turbogenerator, the U type detection coil is installed at the stator core of the generator.Under no-load and rated load conditions, different degree of rotor inter-turn short circuit fault simulation is carried out, and the variation law of magnetic flux and inductive voltage through U-shaped detection coil is obtained. It is found that the detection coil method is more practical.It can be used as a diagnosis method of rotor inter-turn short circuit fault.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM311

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李永剛;韓冰;;基于Ansoft的汽輪發(fā)電機(jī)轉(zhuǎn)子匝間短路故障分析[J];電機(jī)與控制應(yīng)用;2015年11期

2 江建明;宋功益;李硯海;;600MW汽輪發(fā)電機(jī)轉(zhuǎn)子繞組接地故障及匝間短路分析與診斷[J];大電機(jī)技術(shù);2015年01期

3 武玉才;李永剛;;基于功率期望原理的汽輪發(fā)電機(jī)勵(lì)磁繞組短路故障診斷[J];中國電機(jī)工程學(xué)報(bào);2014年33期

4 徐家擎;房艷紅;王洪明;;1000MW汽輪發(fā)電機(jī)轉(zhuǎn)子繞組匝間短路故障的診斷研究[J];硅谷;2014年18期

5 武玉才;馮文宗;李永剛;張文靜;;勵(lì)磁繞組短路故障下汽輪發(fā)電機(jī)的電磁穩(wěn)態(tài)特征[J];高電壓技術(shù);2014年05期

6 郝亮亮;吳俊勇;陳占鋒;宋洪磊;;轉(zhuǎn)子匝間短路故障對(duì)大型汽輪發(fā)電機(jī)振動(dòng)的影響機(jī)理[J];電力系統(tǒng)自動(dòng)化;2014年04期

7 尹文俊;李挺;;1000MW汽輪發(fā)電機(jī)轉(zhuǎn)子繞組匝間短路故障的診斷與分析[J];廣東電力;2013年12期

8 李和明;張文靜;李永剛;武玉才;吳瑞春;;汽輪發(fā)電機(jī)勵(lì)磁繞組短路及伴隨故障不平衡電磁力分析[J];華北電力大學(xué)學(xué)報(bào)(自然科學(xué)版);2013年06期

9 何玉靈;萬書亭;唐貴基;武玉才;;定子匝間短路對(duì)發(fā)電機(jī)并聯(lián)支路環(huán)流特性的影響[J];電機(jī)與控制學(xué)報(bào);2013年03期

10 萬書亭;張玉;胡媛媛;;轉(zhuǎn)子繞組匝間短路對(duì)發(fā)電機(jī)轉(zhuǎn)子電磁轉(zhuǎn)矩影響分析[J];電機(jī)與控制學(xué)報(bào);2012年08期

相關(guān)博士學(xué)位論文 前1條

1 萬書亭;發(fā)電機(jī)繞組與偏心故障交叉特征分析及其檢測(cè)方法研究[D];華北電力大學(xué)（河北）;2005年

相關(guān)碩士學(xué)位論文 前5條

1 張嘉賽;發(fā)電機(jī)轉(zhuǎn)子匝間短路的電磁特性分析及診斷方法研究[D];華北電力大學(xué);2016年

2 劉健嵩;大型水輪發(fā)電機(jī)勵(lì)磁繞組內(nèi)部短路故障研究[D];哈爾濱理工大學(xué);2015年

3 張燕燕;基于時(shí)步有限元的巨型水輪發(fā)電機(jī)動(dòng)態(tài)特性及參數(shù)研究[D];華北電力大學(xué);2012年

4 張平平;發(fā)電機(jī)轉(zhuǎn)子繞組匝間短路后電磁場(chǎng)的研究[D];華北電力大學(xué);2011年

5 許兆鳳;基于磁網(wǎng)絡(luò)法汽輪發(fā)電機(jī)轉(zhuǎn)子繞組匝間短路故障的研究[D];華北電力大學(xué)（河北）;2004年

，

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