调峰约束条件下的电网接纳风电能力研究

发布时间：2018-12-09 14:39

【摘要】：随着风电技术的发展,目前我国的风电装机容量已达到较高水平,许多地区的风电场也已形成规模。但现有的电网状况还不能完全满足大规模风电接入的要求,我国存在大规模的“弃风限电”现象,风电建设规模与电网接纳风电容量之间存在明显的矛盾。影响电网接纳风电能力的因素有很多,电网的调峰能力是其中重要的影响因素。本文的研究在综合考虑系统负荷变化特性、风电波动性等条件的基础上,对电网调峰能力约束下的风电接纳水平进行分析和定量计算。主要内容包括： 1)分析研究调峰约束下的电网接纳风电能力所需要考虑的影响因素,包括电网的负荷要求,电网的调峰能力,以及风电出力对其并网的影响等。对几种典型的负荷和风电出力的曲线模型进行分析。 2)对电网的调峰能力进行了研究,即针对电网中几种不同类型的常规机组,对它们的调峰方式、调峰能力及运行经济性进行深入的研究。电网中的常规机组主要包括火电、水电,其中抽水蓄能电站是一种特殊的水力发电方式。这几种常规机组的调峰方式和调峰能力各不相同。 3)在调峰过程中,对持续变动负荷的分配是根据等微增率原则来进行,对于负荷的小幅度频繁波动则是采用改变发电机组出力来跟踪负荷变化。本文给出了基于电网调峰能力和负荷、风电波动性的风电接纳能力的计算方法,以及在此基础上对于电网接纳风电的经济性的计算方法。 4)针对一个区域电网进行具体的风电接纳能力计算,得到电网调峰约束下的风电接纳能力的定量结果。针对含有不同类型机组的电网进行计算,对得到的结果进行分析和比较,由于本文所依据的负荷、风电,以及电网的有关数据都是实际中的典型数据,因此本文的计算结果具有实际的参考意义。
[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.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM614

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