雙饋風(fēng)力發(fā)電機(jī)組對(duì)系統(tǒng)阻尼影響及附加阻尼控制研究
本文選題:雙饋風(fēng)力發(fā)電機(jī)組 + 阻尼轉(zhuǎn)矩分析法; 參考:《華北電力大學(xué)》2017年碩士論文
【摘要】:由于傳統(tǒng)能源的不可再生性及環(huán)境的破壞,我國(guó)可再生能源裝機(jī)容量屢創(chuàng)新高,更多的新能源出力對(duì)電網(wǎng)運(yùn)行的穩(wěn)定性和可靠性帶來(lái)了新的挑戰(zhàn)。可再生能源發(fā)電中,風(fēng)能成為新能源發(fā)電的主力,大規(guī)模風(fēng)電的接入,降低了系統(tǒng)的慣性和阻尼,對(duì)系統(tǒng)安全運(yùn)行穩(wěn)定性產(chǎn)生巨大影響,其中低頻振蕩是穩(wěn)定性研究中重要問(wèn)題之一,在我國(guó)智能電網(wǎng)和能源互聯(lián)網(wǎng)建設(shè)過(guò)程中,此問(wèn)題急需解決,因此本文進(jìn)一步探討了大規(guī)模風(fēng)電接入對(duì)系統(tǒng)阻尼影響及相應(yīng)的抑制措施,具有極為重要的實(shí)際意義和理論意義。本文首先詳細(xì)地介紹了雙饋風(fēng)力發(fā)電機(jī)組的數(shù)學(xué)模型,采用阻尼轉(zhuǎn)矩分析法推導(dǎo)得到含雙饋風(fēng)力發(fā)電機(jī)組的風(fēng)電場(chǎng)對(duì)單機(jī)無(wú)窮大系統(tǒng)提供的正阻尼轉(zhuǎn)矩條件,為后面通過(guò)調(diào)節(jié)風(fēng)電場(chǎng)出力抑制系統(tǒng)功率振蕩提供理論依據(jù)。而后,本文結(jié)合數(shù)據(jù)驅(qū)動(dòng)理念,利用子空間辨識(shí)法的優(yōu)點(diǎn),引入自抗擾控制方法設(shè)計(jì)了一套工程實(shí)用性強(qiáng),不依然與被控對(duì)象數(shù)學(xué)模型的自抗擾控制器。自抗擾控制器設(shè)計(jì)中不需要被控對(duì)象模型,但是通過(guò)辨識(shí)得到的低階數(shù)學(xué)模型依然處在誤差較大的問(wèn)題。最后,針對(duì)以上問(wèn)題,本文考慮定子電壓鎖相環(huán)的功能建立被控對(duì)象的數(shù)學(xué)模型,同時(shí)設(shè)計(jì)出機(jī)側(cè)換流器和有功無(wú)功附加阻尼無(wú)源控制器,并結(jié)合相關(guān)仿真算例驗(yàn)證本文設(shè)計(jì)的控制器的有效性。
[Abstract]:Due to the non-reproducibility of traditional energy and the destruction of environment, the installed capacity of renewable energy in China has repeatedly reached a new high, and more new energy sources have brought new challenges to the stability and reliability of power grid operation.In the renewable energy generation, wind energy becomes the main force of the new energy generation. The large-scale wind power access reduces the inertia and damping of the system, and has a great impact on the safety and stability of the system.Among them, low frequency oscillation is one of the most important problems in stability research. In the process of smart grid and energy Internet construction in China, this problem needs to be solved urgently.Therefore, this paper further discusses the influence of large-scale wind power access on system damping and the corresponding suppression measures, which is of great practical and theoretical significance.In this paper, the mathematical model of doubly-fed wind turbine is introduced in detail, and the positive damping torque condition of wind farm with doubly-fed wind turbine is derived by using damping torque analysis method.It provides a theoretical basis for suppressing the power oscillation of the system by adjusting the wind farm output.Then, combining the idea of data drive and using the advantage of subspace identification method, this paper introduces the active disturbance rejection control method to design a set of active disturbance rejection controller which has strong engineering practicability and is not still in line with the mathematical model of the controlled object.There is no need for the controlled object model in the design of the ADRC, but the low order mathematical model obtained by identification is still in the problem of large error.Finally, considering the function of the stator voltage phase-locked loop (VPLL), the mathematical model of the controlled object is established in this paper. At the same time, a side converter and a passive controller with active and reactive power plus damping are designed.The effectiveness of the controller designed in this paper is verified by a related simulation example.
【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】:2017
【分類號(hào)】:TM315
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