本文選題：最優(yōu)潮流 + 柔性負荷�。� 參考：《華北電力大學(xué)(北京)》2016年碩士論文

【摘要】：柔性負荷已越來越成為新能源消納和電網(wǎng)調(diào)節(jié)的重要手段,成為“源-網(wǎng)-荷”協(xié)調(diào)控制的重要組成部分；另一方面,以風電、光伏為代表的新能源大規(guī)模接入電網(wǎng),但由于輸電瓶頸和負荷消納問題棄風棄光問題嚴重。本文針對上述問題,在深入研究柔性負荷、新能源及常規(guī)電源特性的基礎(chǔ)上,建立“源-網(wǎng)-荷”整體趨優(yōu)的最優(yōu)潮流模型并提出線性規(guī)劃算法,主要工作內(nèi)容有：(1)研究柔性負荷可調(diào)節(jié)和可中斷特性,根據(jù)可調(diào)節(jié)／中斷容量、時間和速度等參數(shù)建立柔性負荷的可調(diào)節(jié)、可中斷模型；研究以風電為代表的大規(guī)模新能源出力特性,以火電、水電為代表的常規(guī)電源調(diào)節(jié)深度、調(diào)節(jié)速度和快速啟停性能。為深入研究柔性負荷參與“源-網(wǎng)-荷”互動優(yōu)化調(diào)節(jié)提供依據(jù)。(2)結(jié)合新的電改形勢下電價松動后的負荷可在一定范圍內(nèi)“柔性”調(diào)節(jié)的趨勢,在傳統(tǒng)最優(yōu)潮流的基礎(chǔ)上,提出了“源-網(wǎng)-荷”互動優(yōu)化運行整體趨優(yōu)的最優(yōu)潮流模型。模型針對系統(tǒng)中任一潮流平衡的時間斷面,在考慮源側(cè)、網(wǎng)側(cè)邊際成本和負荷側(cè)凈邊際效益的基礎(chǔ)上,提出全系統(tǒng)社會凈邊際效益最大化的目標,并確立約束條件的基本表達式。之后,將優(yōu)化模型處理為直流潮流模型,并推導(dǎo)出線性化求解算法。(3)利用Visual Studio軟件,調(diào)用STYRP1.10線性規(guī)劃軟件包對提出的模型和算法進行了編程實現(xiàn)。采用IEEE-5節(jié)點算例分析了“源-網(wǎng)-荷”互動優(yōu)化調(diào)節(jié)的負荷和發(fā)電節(jié)點調(diào)整量,結(jié)果驗證了模型及算法的有效性；并分析了不同類型節(jié)點權(quán)重變化對最優(yōu)潮流結(jié)果的影響。(4)對具有幾十節(jié)點的某區(qū)域電網(wǎng)進行應(yīng)用計算,結(jié)果可供工程應(yīng)用參考。所建模型可以根據(jù)系統(tǒng)運行狀態(tài)實時給出系統(tǒng)社會凈效益最大化的在線輔助決策方案。既能使調(diào)度決策滿足系統(tǒng)安全性、經(jīng)濟性和可靠性等運行要求,又能充分體現(xiàn)柔性負荷參與“源-網(wǎng)-荷”互動的調(diào)節(jié)價值,開拓了電網(wǎng)調(diào)度／交易“相對獨立”后的最優(yōu)潮流新思路,具有一定的推廣應(yīng)用價值。
[Abstract]:Flexible load has become an important means of new energy absorption and grid regulation, and an important part of "source-net-load" coordinated control. On the other hand, new energy, represented by wind power and photovoltaic, is connected to the power grid on a large scale. However, due to transmission bottleneck and load absorption problem, the problem of abandoned wind and light is serious. In this paper, based on the study of the characteristics of flexible load, new energy and conventional power supply, the optimal power flow model of "source-net-load" is established and a linear programming algorithm is proposed. The main work is as follows: (1) the adjustable and interruptible characteristics of flexible load are studied, and the adjustable and interruptible model of flexible load is established according to the parameters of adjustable / interrupted capacity, time and speed. The characteristics of large scale new energy output represented by wind power are studied. The regulation depth, regulating speed and quick start and stop performance of conventional power supply, such as thermal power and hydropower, are studied. In order to deeply study the flexible load participating in the "source-net-load" interactive optimization regulation, and the trend that the load after the electricity price loosening can be adjusted in a certain range under the new situation of electricity reform, and on the basis of the traditional optimal power flow, An optimal power flow model for the overall optimal operation of "source-network-load" interaction optimization is proposed. Based on considering the marginal cost of source side, network side and load side net marginal benefit, the goal of maximizing the net marginal benefit of the whole system is put forward for any time section of power flow balance in the system. And the basic expression of constraint condition is established. After that, the optimization model is treated as a DC power flow model, and the linearization algorithm is deduced. Using Visual Studio software, the proposed model and algorithm are programmed using STYRP1.10 linear programming software package. An example of IEEE-5 node is used to analyze the load and generator node adjustment of "source-network-load" interaction optimization. The results show the validity of the model and algorithm. The influence of different types of node weights on the optimal power flow results is analyzed. 4) the application calculation of a regional power network with dozens of nodes is carried out. The results can be used as a reference for engineering applications. According to the operating state of the system, the model can give the online auxiliary decision scheme to maximize the net benefit of the system in real time. The dispatching decision can not only meet the requirements of system security, economy and reliability, but also fully reflect the value of flexible load regulation in the interaction of "source-net-load". A new idea of optimal power flow after "relative independence" of power dispatching / transaction is developed, which has certain value of popularization and application.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TM74

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