【摘要】：建立了包括引水系統(tǒng)、水輪機(jī)、調(diào)速器、發(fā)電機(jī)電磁系統(tǒng)、電網(wǎng)、水電機(jī)組軸系及廠房耦聯(lián)結(jié)構(gòu)等子模型在內(nèi)全新的水電站系統(tǒng)非線(xiàn)性動(dòng)力耦聯(lián)模型。基于水力、電機(jī)、結(jié)構(gòu)等學(xué)科理論構(gòu)建了涉及水力、機(jī)械和電磁等因素的聯(lián)立微分方程組,并采用有限元法建立機(jī)組軸系和廠房結(jié)構(gòu)模型。結(jié)合Ansys的二次開(kāi)發(fā)功能提出了水-機(jī)-電多因素影響下機(jī)組和廠房耦聯(lián)結(jié)構(gòu)模型不同工況動(dòng)力特性的研究方法。采用差分法及特征線(xiàn)法等數(shù)值計(jì)算方法,利用該模型對(duì)水電站系統(tǒng)的開(kāi)機(jī)工況進(jìn)行了數(shù)值模擬計(jì)算和分析,同時(shí)對(duì)模型的合理性給予了驗(yàn)證。計(jì)算結(jié)果表明,該模型可以模擬計(jì)算水電站系統(tǒng)的開(kāi)機(jī)工況運(yùn)行過(guò)程,并能夠較好反映水電站運(yùn)行時(shí)的各種非線(xiàn)性動(dòng)力特性。針對(duì)水電站系統(tǒng)較為復(fù)雜的特點(diǎn),該模型的建立可對(duì)電站發(fā)電系統(tǒng)進(jìn)行全面的數(shù)值模擬以評(píng)價(jià)和預(yù)測(cè)其運(yùn)行安全性和結(jié)構(gòu)可靠性,從而為水電站在極限工況和過(guò)渡工況的運(yùn)行動(dòng)態(tài)控制提供有益參考。
[Abstract]:A new nonlinear dynamic coupling model of hydropower station system is established, which includes water diversion system, hydraulic turbine, governor, generator electromagnetic system, power grid, power unit shafting and powerhouse coupling structure. Based on the theory of hydraulic, motor and structure, a set of differential equations involving hydraulic, mechanical and electromagnetic factors is constructed, and the model of shafting and powerhouse structure is established by finite element method. Combined with the secondary development function of Ansys, the research method of the dynamic characteristics of the coupled structure model of the unit and the powerhouse under the influence of water, machine and electricity is put forward. By using the difference method and the characteristic line method, the model is used to simulate and analyze the operating conditions of the hydropower station system, and the rationality of the model is verified. The calculation results show that the model can simulate and calculate the operation process of hydropower station system under start-up conditions, and can well reflect all kinds of nonlinear dynamic characteristics of hydropower station. In view of the complex characteristics of hydropower station system, the establishment of the model can carry out comprehensive numerical simulation to evaluate and predict the operation safety and structural reliability of the power generation system. It provides a useful reference for the dynamic control of the hydropower station under the limit and transient conditions.
【作者單位】： 大連理工大學(xué)建設(shè)工程學(xué)部水利工程學(xué)院;太原理工大學(xué)水利科學(xué)與工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51379030) 太原理工大學(xué)校青年基金(2015QN029)
【分類(lèi)號(hào)】：TV734
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本文編號(hào)：2383144