本文選題：水力動(dòng)態(tài) + 調(diào)壓井�。� 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：水力機(jī)組過(guò)渡過(guò)程的研究對(duì)水電站的安全穩(wěn)定運(yùn)行有十分重要的意義。建立完整的水、機(jī)、電模型是對(duì)水電站過(guò)渡過(guò)程進(jìn)行仿真研究的基礎(chǔ),完整的仿真模型應(yīng)該包含系統(tǒng)各部分的詳細(xì)模型。以往由于研究重點(diǎn)的不同所建立的模型通常僅結(jié)合研究目的對(duì)局部子系統(tǒng)進(jìn)行細(xì)化。鑒于此,本人在前人研究的基礎(chǔ)上,建立了相對(duì)完整的水輪發(fā)電機(jī)組控制系統(tǒng)模型。主要內(nèi)容包括以下幾個(gè)方面:(1)在水輪機(jī)暫態(tài)模型中,調(diào)壓井的水力動(dòng)態(tài)通常作為一個(gè)附加輸入項(xiàng)或獨(dú)立變量,為了消除調(diào)壓井獨(dú)立變量,減少未知量個(gè)數(shù),本文將調(diào)壓井動(dòng)態(tài)歸并到管道末端的水力動(dòng)態(tài),建立了計(jì)及調(diào)壓井動(dòng)態(tài)的水力系統(tǒng)動(dòng)態(tài)模型。并與傳統(tǒng)方法建立的水力系統(tǒng)動(dòng)態(tài)模型進(jìn)行仿真對(duì)比,驗(yàn)證了所建立模型滿足研究水輪機(jī)暫態(tài)特性的需要。(2)建立了完整的水輪發(fā)電機(jī)組控制系統(tǒng)模型,包括PID調(diào)速器模型,PI勵(lì)磁控制器模型和三階發(fā)電機(jī)模型。討論了在仿真研究水輪發(fā)電機(jī)組動(dòng)態(tài)特性時(shí),不同水力系統(tǒng)模型對(duì)機(jī)組調(diào)節(jié)品質(zhì)的影響。通過(guò)仿真表明,機(jī)組暫態(tài)過(guò)程受水力系統(tǒng)模型詳細(xì)程度影響,采用彈性水擊模型能詳細(xì)反映系統(tǒng)動(dòng)態(tài)。(3)選取不同的控制系統(tǒng)參數(shù),基于所建立的水輪發(fā)電機(jī)組控制系統(tǒng)模型,仿真研究了控制系統(tǒng)參數(shù)對(duì)有調(diào)壓井的水輪發(fā)電機(jī)組調(diào)節(jié)品質(zhì)的影響。通過(guò)仿真表明,控制系統(tǒng)參數(shù)對(duì)機(jī)組暫態(tài)調(diào)節(jié)過(guò)程有影響,在調(diào)壓井水位波動(dòng)階段,控制系統(tǒng)參數(shù)對(duì)機(jī)組調(diào)節(jié)影響較小。(4)對(duì)有調(diào)壓井水電站過(guò)渡過(guò)程的影響因素進(jìn)行了分析,包括水流慣性時(shí)間、調(diào)壓井面積、引水管道粗糙程度和負(fù)荷擾動(dòng)程度。仿真表明,水流慣性時(shí)間影響暫態(tài)過(guò)程,調(diào)壓井面積和引水管道粗糙程度對(duì)調(diào)壓井水位波動(dòng)階段有影響,負(fù)荷擾動(dòng)程度對(duì)暫態(tài)和調(diào)壓井水位波動(dòng)階段的動(dòng)態(tài)品質(zhì)都有影響。
[Abstract]:The research on the transient process of hydraulic unit is very important for the safe and stable operation of hydropower station. To establish a complete model of water, machine and electricity is the basis of the simulation research on the transition process of hydropower station. The complete simulation model should include the detailed model of each part of the system. In the past, the local subsystems were refined by the models based on different research emphases. In view of this, on the basis of previous research, I have established a relatively complete control system model of hydrogenerator set. The main contents include the following aspects: (1) in the transient model of hydraulic turbine, the hydraulic performance of the surge well is usually regarded as an additional input or independent variable, in order to eliminate the independent variable of the surge well and reduce the number of unknown variables, In this paper, a dynamic model of hydraulic system is established, in which the hydraulic performance of the regulating well is merged into the hydraulic performance at the end of the pipeline. Compared with the hydraulic system dynamic model established by the traditional method, it is verified that the established model meets the needs of studying the transient characteristics of the turbine.) the complete control system model of the turbine generator set is established. It includes PID governor model, Pi excitation controller model and third order generator model. In this paper, the influence of different hydraulic system models on the unit regulation quality is discussed when the dynamic characteristics of the turbine generator are studied by simulation. The simulation results show that the transient process of the unit is affected by the detail degree of the hydraulic system model, and the elastic water hammer model can reflect the system dynamics in detail. (3) different control system parameters are selected, based on the established control system model of the hydrogenerator set. The effect of control system parameters on regulating quality of hydraulic turbine generator set with surge well is studied by simulation. The simulation results show that the control system parameters have an effect on the transient regulation process of the unit, and at the stage of water level fluctuation in the surge well, the control system parameters have little effect on the unit regulation. (4) the factors affecting the transient process of the hydropower station with the surge well are analyzed. Including flow inertia time, pressure well area, diversion pipe roughness and load disturbance. The simulation results show that the inertial time of the flow affects the transient process, the area of the surge well and the roughness of the diversion pipe affect the water level fluctuation stage, and the load disturbance degree has an effect on the transient state and the dynamic quality of the water level fluctuation stage.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TV734.1

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