【摘要】：新能源接入電網(wǎng)后，使得電力系統(tǒng)的暫態(tài)問題變得更加突出，為了確保電網(wǎng)的安全運(yùn)行，必須迅速對受擾后系統(tǒng)的暫態(tài)穩(wěn)定情況做出判斷。近年來，學(xué)者們開始注意到了Kuramoto模型頻率同步與電力系統(tǒng)暫態(tài)穩(wěn)定的相似性。最近的二階非均勻Kuramoto模型頻率同步研究成果可通過二階非均勻Kuramoto模型基礎(chǔ)圖的參數(shù)與狀態(tài)來體現(xiàn)系統(tǒng)頻率同步點(diǎn)的吸引域，這恰好解決了直接法中難以估計(jì)受擾后系統(tǒng)穩(wěn)定平衡點(diǎn)吸引域的困難。 本文通過建立二階非均勻Kuramoto模型與網(wǎng)絡(luò)收縮電力系統(tǒng)模型間的對應(yīng)關(guān)系，將二階非均勻Kuramoto模型頻率同步理論融入暫態(tài)穩(wěn)定分析，導(dǎo)出了基于二階非均勻Kuramoto模型的暫態(tài)穩(wěn)定判據(jù)。只需比較擾動(dòng)消除瞬間系統(tǒng)初始狀態(tài)變量的一維映射值與穩(wěn)定平衡點(diǎn)吸引域的一維映射值間的大小關(guān)系，即可對擾動(dòng)消除后系統(tǒng)的暫態(tài)穩(wěn)定性做出判別。在此基礎(chǔ)上，提出一種基于二階非均勻Kuramoto模型的暫態(tài)穩(wěn)定分析方法。 對于電力系統(tǒng)內(nèi)發(fā)生故障時(shí)的情況，從2機(jī)3節(jié)點(diǎn)系統(tǒng)、WSCC3機(jī)9節(jié)點(diǎn)系統(tǒng)、CIGRE7機(jī)10節(jié)點(diǎn)系統(tǒng)以及IEEE6機(jī)30節(jié)點(diǎn)系統(tǒng)的算例分析結(jié)果可以看出，基于二階非均勻Kuramoto模型的故障極限切除時(shí)間算法形式簡潔、計(jì)算快速，不僅能對電力系統(tǒng)受擾后的暫態(tài)穩(wěn)定情況進(jìn)行判斷，還能給出不同故障切除時(shí)間下受擾系統(tǒng)的穩(wěn)定裕度，具有較高的工程實(shí)用價(jià)值。 對于電力系統(tǒng)內(nèi)節(jié)點(diǎn)功率發(fā)生擾動(dòng)時(shí)的情況，從CIGRE7機(jī)10節(jié)點(diǎn)系統(tǒng)的算例分析中可以看出，基于二階非均勻Kuramoto模型的擾動(dòng)最大持續(xù)時(shí)間估計(jì)方法可根據(jù)作用于系統(tǒng)功率擾動(dòng)的幅值快速估計(jì)出在該擾動(dòng)作用下為保證系統(tǒng)不失穩(wěn)所允許的擾動(dòng)最大持續(xù)時(shí)間。雖然該方法目前所得結(jié)果較為保守，但卻有很明確的改進(jìn)方向，一旦方法的保守性得以改善，，就可為電網(wǎng)的安全運(yùn)行提供有利保障。 本文工作得到國家重點(diǎn)研究發(fā)展計(jì)劃（973計(jì)劃）《智能電網(wǎng)中大規(guī)模新能源電力安全高效利用基礎(chǔ)研究》（課題一：新能源電力系統(tǒng)動(dòng)力學(xué)特性及建模理論）（2012CB215201）以及國家高技術(shù)研究發(fā)展計(jì)劃（863計(jì)劃）重大項(xiàng)目《高滲透率間歇性能源的區(qū)域電網(wǎng)關(guān)鍵技術(shù)研究和示范》（2011AA05A105）的資助。
[Abstract]:After the new energy is connected to the power network, the transient problem of the power system becomes more prominent. In order to ensure the safe operation of the power network, it is necessary to judge the transient stability of the power system after the disturbance quickly. In recent years, scholars have begun to pay attention to the similarity between frequency synchronization of Kuramoto model and transient stability of power system. The recent research results of frequency synchronization of second-order non-uniform Kuramoto model can reflect the attraction region of frequency synchronization point by the parameters and states of the basic diagram of second-order non-uniform Kuramoto model. This solves the difficulty of estimating the attractive region of the stable equilibrium point in the direct method. In this paper, by establishing the corresponding relation between the second-order nonuniform Kuramoto model and the network shrinking power system model, the frequency synchronization theory of the second-order non-uniform Kuramoto model is incorporated into the transient stability analysis, and the transient stability criterion based on the second-order non-uniform Kuramoto model is derived. It is only necessary to compare the size relationship between the one-dimensional mapping value of the initial state variable and the one-dimensional mapping value of the attraction region of the stable equilibrium point, and then to judge the transient stability of the system after the disturbance cancellation. On this basis, a transient stability analysis method based on second order nonuniform Kuramoto model is proposed. For the situation of power system failure, it can be seen from the example analysis of the 10-bus system of CIGRE7 and the 30-bus system of IEEE6 machine, which is a 9-bus system of WSCC3 machine and a 3-bus system of a two-machine three-bus system. Based on the second-order nonuniform Kuramoto model, the fault limit cutting time algorithm is simple and fast. It can not only judge the transient stability of the power system after being disturbed, but also give the stability margin of the disturbed system under different fault removal times. It has high engineering practical value. In the case of power system node power disturbance, it can be seen from the example analysis of CIGRE7 machine 10-bus system. Based on the second-order nonuniform Kuramoto model, the maximum duration of the disturbance can be estimated quickly based on the amplitude of the disturbance acting on the power disturbance of the system, and the maximum duration of the disturbance under the disturbance can be quickly estimated to ensure the stability of the system. Although the results obtained by this method are conservative at present, there is a clear direction for improvement. Once the conservatism of the method is improved, it can provide a favorable guarantee for the safe operation of the power grid. The National key Research and Development Plan (973 Plan) "basic Research on the safe and efficient Utilization of Large-Scale New Energy and Electric Power in Smart Grid" (topic 1: dynamic characteristics and Modeling Theory of New Energy Power system) (2012CB215201) and the country High Technology Research and Development Program (Project 863) funded by a major project, "Research and demonstration of key Technologies in Regional Power grids with High permeability intermittent Energy" (2011AA05A105).
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM712

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 林偉芳;湯涌;孫華東;郭強(qiáng);趙紅光;曾兵;;巴西“2·4”大停電事故及對電網(wǎng)安全穩(wěn)定運(yùn)行的啟示[J];電力系統(tǒng)自動(dòng)化;2011年09期

2 葛睿;董昱;呂躍春;;歐洲“11.4”大停電事故分析及對我國電網(wǎng)運(yùn)行工作的啟示[J];電網(wǎng)技術(shù);2007年03期

3 ;Eradicating Poverty[J];China & Africa;2012年01期

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