本文關(guān)鍵詞： 汽輪-發(fā)電機 負荷調(diào)節(jié) 有限元分析 扭轉(zhuǎn)壽命損耗 爬坡率 調(diào)峰范圍 模型　出處：《電力自動化設(shè)備》2017年08期 　論文類型：期刊論文

【摘要】：針對未來可再生能源發(fā)電容量比例不斷提升、傳統(tǒng)火力發(fā)電機組由承擔(dān)腰荷的角色向具有深度調(diào)峰能力的角色轉(zhuǎn)變的發(fā)展趨勢,研究汽輪-發(fā)電機快速頻繁調(diào)節(jié)出力引起的扭轉(zhuǎn)壽命損耗。利用有限元分析軟件ANSYS,建立了汽輪-發(fā)電機組軸系模型,得到危險軸段的扭轉(zhuǎn)響應(yīng);利用雨流計數(shù)法將工作循環(huán)應(yīng)力轉(zhuǎn)化為對稱循環(huán)下的疲勞應(yīng)力;考慮負荷的頻繁波動,結(jié)合Manson-coffin應(yīng)變-壽命公式和連續(xù)損傷理論評估軸系扭轉(zhuǎn)壽命損耗。以國產(chǎn)600 WM超臨界汽輪-發(fā)電機為例進行仿真,研究扭轉(zhuǎn)壽命損耗與負荷波動性、隨機性的關(guān)系:隨著爬坡率和調(diào)峰范圍的提高,壽命損耗呈指數(shù)增長;權(quán)衡機組壽命損耗與可再生能源的消納,根據(jù)機組運行特點選擇適當(dāng)?shù)呐榔侣屎驼{(diào)峰范圍是火電機組將來作為深度調(diào)峰機組使用的關(guān)鍵;當(dāng)考慮負荷的頻繁波動特性時,扭轉(zhuǎn)壽命損耗符合累積規(guī)則,這是由轉(zhuǎn)子扭轉(zhuǎn)振蕩衰減較快造成的。
[Abstract]:In view of the increasing proportion of renewable energy generation capacity in the future, the development trend of traditional thermal power generating units from the role of waist load to the role of deep peak-shaving capacity changes. The torsional life loss caused by fast and frequent adjustment of turbine-generator force is studied. By using finite element analysis software ANSYS, the shaft system model of turbine-generator unit is established, and the torsional response of dangerous shaft segment is obtained. The working cyclic stress is transformed into the fatigue stress under symmetrical cycle by the method of rain flow counting. Consider the frequent fluctuations of the load. Combined with Manson-coffin strain-life formula and continuous damage theory, the torsional life loss of shafting is evaluated. The simulation of 600WM supercritical turbo-generator is carried out. The relationship between torsional life loss and load volatility and randomness is studied. With the increase of slope climbing rate and peak regulation range, the life loss increases exponentially. The key to use thermal power units as deep peak-shaving units in the future is to balance unit life loss and renewable energy consumption and select appropriate slope climbing rate and peak-shaving range according to unit operating characteristics. When considering the frequent fluctuation of the load, the torsional life loss accords with the cumulative rule, which is caused by the fast attenuation of the torsional oscillation of the rotor.
【作者單位】： 華北電力大學(xué)電氣與電子工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(51077053)~~
【分類號】：TM311
【正文快照】： 0引言未來幾十年將形成以核電為基荷、風(fēng)光等可再生能源發(fā)電容量比例大幅提升、高能耗的傳統(tǒng)火力發(fā)電機組的裝機容量逐漸減小、負荷側(cè)需求管理更加科學(xué)合理的電網(wǎng)清潔能源結(jié)構(gòu)。由于風(fēng)光等可再生能源發(fā)電具有隨機和不確定的特點,大規(guī)�？稍偕茉窗l(fā)電接入后將影響電網(wǎng)的靈活性

【參考文獻】

相關(guān)期刊論文 前5條

1 聶永輝;馮浩然;于永利;王中杰;;含風(fēng)電場的電力系統(tǒng)動態(tài)優(yōu)化潮流[J];電力自動化設(shè)備;2017年02期

2 肖定W，

本文編號：1445604