本文選題：互聯(lián)電力系統(tǒng) + 時(shí)滯��； 參考：《南京理工大學(xué)》2017年碩士論文

【摘要】：伴隨我國(guó)西電東送、全國(guó)聯(lián)網(wǎng)戰(zhàn)略的慢慢實(shí)施,互聯(lián)電力系統(tǒng)的范圍漸漸擴(kuò)大,系統(tǒng)互聯(lián)激發(fā)的低頻振蕩問(wèn)題嚴(yán)重威脅著電網(wǎng)的穩(wěn)定性和傳輸能力。同時(shí),隨著廣域測(cè)量系統(tǒng)應(yīng)用到電力系統(tǒng)的穩(wěn)定控制中,以廣域測(cè)量信號(hào)作為附加阻尼控制器的輸入信號(hào)已經(jīng)成為可能,對(duì)系統(tǒng)的低頻振蕩有很好的抑制作用,但是廣域信號(hào)在傳輸?shù)倪^(guò)程中會(huì)有時(shí)滯的產(chǎn)生,時(shí)滯的出現(xiàn)會(huì)增大控制器的設(shè)計(jì)難度,所以需要處理好時(shí)滯的問(wèn)題。本文中,采用PSS和SVC聯(lián)合抑制電力系統(tǒng)低頻振蕩,分析附加控制的電力系統(tǒng)穩(wěn)定器(PSS)對(duì)區(qū)域內(nèi)低頻振蕩的原理,針對(duì)所設(shè)計(jì)的控制器整定合適的參數(shù);同時(shí),考慮了時(shí)滯影響的靜止無(wú)功補(bǔ)償器(SVC)廣域附加阻尼控制器的設(shè)計(jì),建立時(shí)滯電力系統(tǒng)的數(shù)學(xué)模型,分析選擇SVC的附加阻尼控制器的輸入信號(hào)以及SVC的安裝地點(diǎn),采用Lambert W函數(shù)的方法設(shè)計(jì)控制器的增益K。用MATLAB搭建含有PSS和SVC附加阻尼控制器的雙機(jī)電力系統(tǒng)的模型并對(duì)其進(jìn)行仿真研究。驗(yàn)證含有PSS和SVC附加阻尼控制器的雙機(jī)系統(tǒng)在有時(shí)滯時(shí)對(duì)系統(tǒng)穩(wěn)定性的影響,并模擬單相短路故障與三相短路故障,分析有無(wú)PSS和SVC時(shí)對(duì)電力系統(tǒng)低頻振蕩的作用。通過(guò)對(duì)仿真波形的分析,可以判斷出PSS和所設(shè)計(jì)的考慮廣域信號(hào)時(shí)滯影響的SVC附加阻尼控制器聯(lián)合抑制互聯(lián)電網(wǎng)低頻振蕩的有效性。
[Abstract]:Along with the power transmission from west to east and the implementation of national interconnection strategy, the range of interconnected power system is gradually expanding, and the low frequency oscillation caused by system interconnection seriously threatens the stability and transmission ability of power grid. At the same time, with the wide area measurement system applied to the stability control of power system, it is possible to use the wide area measurement signal as the input signal of the additional damping controller, which can restrain the low frequency oscillation of the system. However, in the process of wide-area signal transmission, there will be time delay, which will increase the design difficulty of controller, so it is necessary to deal with the problem of delay. In this paper, PSS and SVC are used to suppress the low frequency oscillation of power system, and the principle of the power system stabilizer with additional control is analyzed. The design of wide-area additional damping controller for static Var compensator (SVC) with time-delay effect is presented. The mathematical model of time-delay power system is established, and the input signal of the additional damping controller of SVC and the installation location of SVC are analyzed. The gain K. of the controller is designed by using Lambert W function. The model of dual machine power system with PSS and SVC additional damping controller is built with MATLAB and its simulation research is carried out. The effects of PSS and SVC additional damping controllers on the stability of power system with time delay are verified, and the single-phase and three-phase short-circuit faults are simulated. The effect of PSS and SVC on the low-frequency oscillation of power system is analyzed. By analyzing the simulation waveform, the effectiveness of PSS and the designed SVC additional damping controller considering the influence of wide area delay on the suppression of low frequency oscillation in interconnected power system can be judged.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM712

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本文編號(hào)：1794323