基于多目标决策的特高压输电线路抗冰方法组合优化模型研究

发布时间：2018-01-26 05:39

本文关键词： 特高压抗冰方法投资决策多目标决策优化层次分析法　出处：《湖南大学》2015年硕士论文　论文类型：学位论文

【摘要】：特高压输电线路将逐步成为未来电网的骨架,其安全稳定的运行对电网极为重要。特高压抗冰投资决策的核心问题是确定线路抗冰组合最优设计方案。建立特高压输电线路抗冰方法组合优化模型能解决此问题,提高抗冰效率,合理分配人员资金。但目前特高压线路抗冰方法决策缺乏定量的科学分析方法。所以特高压输电线路的抗冰方法组合优化模型的研究具有重要意义。本文在湖南省特高压输电线路覆冰增长模型、防冰除冰技术研究的基础上,建立了特高压输电线路的抗冰方法组合优化模型,并结合实际线路,对研究结果进行验证。主要内容如下:首先,本文采用积分模型对不同气象条件下的导线覆冰程度值进行了修正,提出了采用不同组合抗冰方法下的覆冰程度值的计算公式。然后,根据防、抗、融、除等抗冰方法,以覆冰程度值和冰灾概率计算为基础,建立特高压线路抗冰方法组合的多目标决策优化模型。此模型的目标函数为投资费用最小化、冰灾损失最小化、特大冰灾风险最小化,约束条件为考虑覆冰程度,网络拓扑重要性,以及融冰电源点。其次,利用效用值将具有互异性、相互制约的三个目标函数值转化为无量纲的效用值,并运用层次分析法计算各目标在约束条件下的权重值,将多目标地函数转化为单一目标函数,并确定模型目标函数的最优解,确定使目标函数达到最小的抗冰方法的最优组合方案。最后,本文运用所提出的模型对实际工程进行了计算分析,验证了模型的合理性。为特高压抗冰方案的选择提供了理论依据。
[Abstract]:UHV transmission line will gradually become the backbone of future power grid, the safe and stable operation of the power grid is very important. The core problem of UHV anti ice investment decision is to determine the optimal design scheme of line anti ice. The establishment of UHV transmission line anti icing method of portfolio optimization model can solve this problem, improve the anti icing efficiency, reasonable the allocation of staff funds. But the decision anti icing methods for UHV transmission lines is lack of quantitative analysis methods. So the study of the anti icing method of portfolio optimization model of UHV transmission lines is of great significance. This paper in Hunan province UHV transmission line icing model, anti icing and ice technology based on the established anti ice combination optimization method model of UHV transmission line, and combined with the actual line, to verify the results of the study. The main contents are as follows: firstly, this paper adopts the integral model of different gas As under the condition of icing degree is modified, puts forward the calculation formula of icing degree by different combinations of anti icing methods under the value. Then, according to the anti, anti, anti ice melting, in addition, to the icing and ice disaster probability calculation based on multi-objective decision optimization model a combination of UHV line Kangbing method. The objective function of this model is to minimize the cost of investment, to minimize the loss of ice disaster, serious ice disaster risk minimization, the constraint conditions are considered icing degree, the importance of network topology, and the ice melting power. Secondly, using the utility value will have a dissimilarity, three objective functions are control values are converted to dimensionless utility value, and use AHP to calculate the weight of each target in the constraint conditions, multi-objective function will be transformed into a single objective function model, and determine the objective function of the optimal solutions is determined. The optimal combination scheme of the anti icing method with minimum standard function is achieved. Finally, the proposed model is applied to the actual engineering calculation and analysis, which verifies the rationality of the model. It provides a theoretical basis for the selection of UHV anti icing scheme.

【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM752

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