發(fā)布時間：2018-12-09 14:39

【摘要】：隨著風(fēng)電技術(shù)的發(fā)展,目前我國的風(fēng)電裝機(jī)容量已達(dá)到較高水平,許多地區(qū)的風(fēng)電場也已形成規(guī)模。但現(xiàn)有的電網(wǎng)狀況還不能完全滿足大規(guī)模風(fēng)電接入的要求,我國存在大規(guī)模的“棄風(fēng)限電”現(xiàn)象,風(fēng)電建設(shè)規(guī)模與電網(wǎng)接納風(fēng)電容量之間存在明顯的矛盾。影響電網(wǎng)接納風(fēng)電能力的因素有很多,電網(wǎng)的調(diào)峰能力是其中重要的影響因素。本文的研究在綜合考慮系統(tǒng)負(fù)荷變化特性、風(fēng)電波動性等條件的基礎(chǔ)上,對電網(wǎng)調(diào)峰能力約束下的風(fēng)電接納水平進(jìn)行分析和定量計(jì)算。主要內(nèi)容包括： 1)分析研究調(diào)峰約束下的電網(wǎng)接納風(fēng)電能力所需要考慮的影響因素,包括電網(wǎng)的負(fù)荷要求,電網(wǎng)的調(diào)峰能力,以及風(fēng)電出力對其并網(wǎng)的影響等。對幾種典型的負(fù)荷和風(fēng)電出力的曲線模型進(jìn)行分析。 2)對電網(wǎng)的調(diào)峰能力進(jìn)行了研究,即針對電網(wǎng)中幾種不同類型的常規(guī)機(jī)組,對它們的調(diào)峰方式、調(diào)峰能力及運(yùn)行經(jīng)濟(jì)性進(jìn)行深入的研究。電網(wǎng)中的常規(guī)機(jī)組主要包括火電、水電,其中抽水蓄能電站是一種特殊的水力發(fā)電方式。這幾種常規(guī)機(jī)組的調(diào)峰方式和調(diào)峰能力各不相同。 3)在調(diào)峰過程中,對持續(xù)變動負(fù)荷的分配是根據(jù)等微增率原則來進(jìn)行,對于負(fù)荷的小幅度頻繁波動則是采用改變發(fā)電機(jī)組出力來跟蹤負(fù)荷變化。本文給出了基于電網(wǎng)調(diào)峰能力和負(fù)荷、風(fēng)電波動性的風(fēng)電接納能力的計(jì)算方法,以及在此基礎(chǔ)上對于電網(wǎng)接納風(fēng)電的經(jīng)濟(jì)性的計(jì)算方法。 4)針對一個區(qū)域電網(wǎng)進(jìn)行具體的風(fēng)電接納能力計(jì)算,得到電網(wǎng)調(diào)峰約束下的風(fēng)電接納能力的定量結(jié)果。針對含有不同類型機(jī)組的電網(wǎng)進(jìn)行計(jì)算,對得到的結(jié)果進(jìn)行分析和比較,由于本文所依據(jù)的負(fù)荷、風(fēng)電,以及電網(wǎng)的有關(guān)數(shù)據(jù)都是實(shí)際中的典型數(shù)據(jù),因此本文的計(jì)算結(jié)果具有實(shí)際的參考意義。
[Abstract]:With the development of wind power technology, the installed capacity of wind power in China has reached a high level, and wind farms in many areas have formed scale. However, the existing power grid can not fully meet the requirements of large-scale wind power access. There is a large-scale phenomenon of "abandon wind and limit power" in China, and there is an obvious contradiction between the scale of wind power construction and the capacity of wind power. There are many factors that affect the wind power capacity of power grid, and the peak-shaving ability is one of the most important factors. Based on the comprehensive consideration of system load characteristics and wind power fluctuation, this paper analyzes and quantitatively calculates the wind power acceptance level under the constraints of power grid peak-shaving ability. The main contents are as follows: 1) the factors that need to be considered in accepting wind power under peak-shaving constraints are analyzed, including load requirements, peak shaving capacity, and the influence of wind power generation on grid connection. Several typical curve models of load and wind power are analyzed. 2) the peak-shaving ability of power grid is studied, that is, the peak-shaving mode, peak-shaving ability and operation economy of several kinds of conventional units in power grid are studied deeply. The conventional generating units in power grid mainly include thermal power and hydropower, among which pumped storage power station is a special type of hydropower generation. The peak-shaving mode and peak-shaving capability of these conventional units are different. 3) in the process of peak-shaving, the distribution of continuous variable load is carried out according to the principle of equal slight increase rate, and for the small amplitude frequent fluctuation of load, the change of generator output force is adopted to track the load change. In this paper, the calculation method of wind power acceptance capacity based on peak shaving capacity, load and fluctuation of wind power is given, and the calculation method for the economy of accepting wind power in power grid is also presented. 4) the specific wind power acceptance capacity is calculated for a regional power grid, and the quantitative results of wind power acceptance capacity under peak load regulation are obtained. For the grid with different types of generating units, the results are analyzed and compared. Because the load, wind power and relevant data of the power grid are typical data in practice, Therefore, the results of this paper have practical reference significance.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM614

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本文編號：2369552