本文選題：風(fēng)力發(fā)電 + 雙饋異步風(fēng)力發(fā)電機(jī)　； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：變速恒頻風(fēng)力發(fā)電技術(shù)自誕生后發(fā)展迅猛,迅速占據(jù)風(fēng)力發(fā)電行業(yè)的主流地,解決了長(zhǎng)期以來(lái)困擾風(fēng)力發(fā)電領(lǐng)域的最大間題,即如何在多變的環(huán)境風(fēng)速條件下得到穩(wěn)定的電能輸出。作為變速恒頻風(fēng)力發(fā)電技術(shù)的核心設(shè)備雙饋式異步發(fā)電機(jī),以其特定的電磁結(jié)構(gòu)與運(yùn)行控制策略,在風(fēng)輪捕獲風(fēng)能轉(zhuǎn)化為機(jī)械能,經(jīng)由傳動(dòng)系統(tǒng)帶動(dòng)其轉(zhuǎn)軸變速運(yùn)行的同時(shí),向電網(wǎng)輸出穩(wěn)定的電功率。雙饋異步風(fēng)力發(fā)電機(jī)的出現(xiàn),不僅大幅提高了風(fēng)力發(fā)電的電能質(zhì)量,同時(shí)也大大提高了風(fēng)力發(fā)電機(jī)組與電網(wǎng)的運(yùn)行的安全性。 相較于傳統(tǒng)火力發(fā)電行業(yè)的汽輪發(fā)電機(jī),雙饋異步風(fēng)力發(fā)電機(jī)在幾何尺寸上小得多,這是很直觀的印象。當(dāng)更加深入的分析它們機(jī)械結(jié)構(gòu)、電磁關(guān)系、控制策略等方面,會(huì)發(fā)現(xiàn)不僅僅局限于幾何尺寸,雙饋異步風(fēng)力發(fā)電機(jī)與汽輪發(fā)電機(jī)在各方面都有所不同。通過(guò)一些的風(fēng)力發(fā)電廠的運(yùn)行記錄,我們能發(fā)現(xiàn)一些發(fā)電機(jī)常見(jiàn)的故障,但也有一些故障是雙饋異步風(fēng)力發(fā)電機(jī)獨(dú)有的。目前已經(jīng)成熟的汽輪發(fā)電機(jī)狀態(tài)監(jiān)測(cè)與故障診斷技術(shù),雖然對(duì)雙饋異步風(fēng)力發(fā)電機(jī)的狀態(tài)監(jiān)測(cè)與故障診斷有很多可以借鑒與參考的地方,但并不完全適用。本文在總結(jié)前人對(duì)于發(fā)電機(jī)這一設(shè)備的狀態(tài)監(jiān)測(cè)與故障診斷的研究基礎(chǔ)之上,結(jié)合雙饋異步風(fēng)力發(fā)電機(jī)的特點(diǎn)與實(shí)際運(yùn)行工況,研究了適用于雙饋異步風(fēng)力發(fā)電機(jī)的狀態(tài)監(jiān)測(cè)與故障診斷技術(shù)。 本文主要研究?jī)?nèi)容為： (1)詳細(xì)闡述了變速恒頻風(fēng)力發(fā)電技術(shù)的工作原理及工作特性。從組織結(jié)構(gòu)、電磁關(guān)系、等效電路等多個(gè)方面對(duì)雙饋異步風(fēng)力發(fā)電機(jī)進(jìn)行了細(xì)致剖析。理清雙饋異步風(fēng)力發(fā)電機(jī)監(jiān)測(cè)參數(shù)之間的耦合關(guān)系。 (2)對(duì)現(xiàn)有的發(fā)電機(jī)故障分類(lèi)體系進(jìn)行分析,結(jié)合雙饋異步風(fēng)力發(fā)電機(jī)的特點(diǎn)及電廠運(yùn)行的歷史記錄,對(duì)雙饋異步風(fēng)力發(fā)電機(jī)的故障進(jìn)行整理。針對(duì)典型性故障從故障產(chǎn)生原因、發(fā)展、影響以及產(chǎn)生的后果這一過(guò)程進(jìn)行機(jī)理分析,完整的列出所分析的故障影響的運(yùn)行參數(shù)變化情況。 (3)簡(jiǎn)要分析了階比重采樣技術(shù)在風(fēng)電機(jī)組變工況運(yùn)行特點(diǎn)的適用性。針對(duì)分析得出的在線監(jiān)測(cè)參數(shù),對(duì)有必要進(jìn)行重采樣的信號(hào)進(jìn)行變換,排除變工況對(duì)信號(hào)產(chǎn)生的影響。對(duì)經(jīng)過(guò)處理的所有信號(hào)進(jìn)行對(duì)應(yīng)的處理,對(duì)各類(lèi)故障各參數(shù)變化征兆進(jìn)行融合,形成一個(gè)整體的故障識(shí)別體系。
[Abstract]:Since the birth of the variable speed constant frequency wind power technology, it has developed rapidly and occupied the mainstream of the wind power industry, and solved the biggest problem that has plagued the field of wind power generation for a long time. That is, how to get stable power output under the condition of changeable environmental wind speed. As the core equipment of variable speed constant frequency wind power generation technology, doubly-fed asynchronous generator, with its special electromagnetic structure and operation control strategy, is used to capture wind energy and convert wind energy into mechanical energy, and drive its rotating shaft to change speed through transmission system. Output steady electrical power to the power grid. The emergence of doubly-fed asynchronous wind generators not only greatly improves the power quality of wind power generation, but also greatly improves the security of wind turbine and power grid operation. Compared with traditional steam turbine generators, doubly-fed asynchronous wind turbines are much smaller in geometry, which is an intuitive impression. When we analyze their mechanical structure, electromagnetic relationship, control strategy and so on, we can find that they are not limited to geometry, but are different between doubly-fed asynchronous wind generator and turbogenerator. Through some records of wind power plants, we can find some common faults of generators, but there are also some faults that are unique to doubly-fed asynchronous wind turbines. At present, the status monitoring and fault diagnosis technology of turbogenerator is mature. Although there are many references for the condition monitoring and fault diagnosis of doubly-fed asynchronous wind turbine, it is not completely applicable. On the basis of summarizing the previous researches on the condition monitoring and fault diagnosis of the generator, this paper combines the characteristics of the doubly-fed asynchronous wind turbine and the actual operating conditions. The condition monitoring and fault diagnosis technology for doubly-fed asynchronous wind turbine is studied. The main contents of this paper are as follows: The principle and characteristics of variable speed constant frequency wind power generation technology are described in detail. The structure, electromagnetic relation and equivalent circuit of doubly-fed asynchronous wind turbine are analyzed in detail. The coupling relationship between the monitoring parameters of doubly-fed asynchronous wind turbine is clarified. 2) analyzing the existing fault classification system of generator, combining the characteristics of doubly-fed asynchronous wind turbine and the historical record of power plant operation, sorting out the faults of doubly-fed asynchronous wind generator. This paper analyzes the mechanism of the typical fault from the cause, development, influence and consequence of the fault, and lists the variation of the operation parameters of the fault. The applicability of step specific gravity sampling technology in wind turbine operation under variable operating conditions is briefly analyzed. According to the on-line monitoring parameters obtained from the analysis, the signal which is necessary to resampling is transformed to eliminate the influence of the variable working conditions on the signal production. All the processed signals are processed and all kinds of fault parameters are fused to form a whole fault identification system.
【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】：2014
【分類(lèi)號(hào)】：TM315

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