【作者】 苏天诺；

【导师】 查晓明；

【作者基本信息】 武汉大学 ， 电力系统及其自动化， 2014， 博士

【摘要】 随着电气化铁路建设的迅速推进,其所带来的电能质量问题引起了越来越广泛的关注,而由于实际数据的匮乏及电气化铁路电能质量的特殊性,目前这方面的研究在国内外都还十分匮乏,鉴于此,本论文对电气化铁路电能质量的分析及治理工作展开系统研究,对于提高电力系统及电气化铁路自身的稳定性和安全性具有重要的实际价值和理论意义。论文从电气化铁路电能质量的分析和治理两个方面展开研究,主要分为五个部分。(1)建立了国内主流交直交机型和交直机型的高频电磁暂态数学模型和基频数学模型,分别用以暂态分析及控制器设计。分析了典型机车在不同载荷、路况、工况、调度条件下的启动、制动、正常等运行状态下的谐波电流、无功功率及电压波动特性,并在PSCAD软件环境下进行了仿真验证,‘将仿真结果与牵引机’车的实测数据进行比较,验证了数学模型的有效性。(2)建立了国内主流V/X牵引变压器的数学模型,分析了牵引变压器导致的谐波和负序电流的产生机理,研究了在不同负荷条件下的谐波和负序电流传递规律,并进行了仿真验证和实测数据比对。(3)在主流机车和牵引变模型的基础上,建立了牵引站的动力学模型,分析了牵引站的综合电能质量问题的产生机理和传递规律,从电能质量动力学特征角度出发提出了基于支持向量机的电能质量分类及评估方法,引入松弛因子建立最优分类面,选择高斯核函数并以此为基础给出支持向量机的决策函数,建立了完善的电气化铁路牵引站电能质量等级评估方法,并对该方法进行了验证。(4)论文以实际的混合机车负载为研究对象,引入调度、工况、负荷等因素,将含有多辆机车的电气化铁路综合电能质量问题进行评估分析,基于动力学特征的双傅立叶分析指标和支持向分类理论方法,对综合电能质量问题进行分类。研究了典型的电能质量补偿装置的动力学特性,将不同的补偿装置对应于不同的综合电能质量问题类型,建立经济、安全和实用的多目标优化函数,基于综合电能质量分类评估结果,配置相应的电能质量补偿装置并优化其容量,提出优化补偿方案,实现电气化铁路电能质量的智能化灵活调节。(5)论文对我国电气化铁路的发展规划做出了评估,分析了电气化铁路的电能质量发展趋势,并提出了治理方案。论文对电气化铁路的典型电能质量问题进行了深入的理论分析和仿真验证,最终所有的研究成果均在福厦线厚丰站进行了实际检验,与实测数据高度达成一致,显示了本论文工作的正确性和合理性。更多还原

【Abstract】 With the rapid development of electrified railway, power quality problems caused by that is payed more and more attention. However, because of some reason, little people do the research in this area. So, the analyzes and management of power quality for electrified railway system is studed in this paper to improve the stability and security of power system.The following five parts is included in this paper, from the aspects of analysis and managemen.The study begins with a single locomotive modeling and simulation, electrical topology is divided electric locomotives into two kinds, AC-DC-AC and AC-DC type and their electric models are constructed respectively.dynamic model of the electric locomotive, which is analysed from road conditions, working conditions and scheduling, is converted into power/current model, which is used to analyze electric locomotives harmonics and voltage fluctuations and express the final results as harmonic source model.Then, considering the influence of traction transformer, and the impact of the traction transformers for harmonic and negative sequence current is analyzed, And the conclusions in the load balancing and imbalance typical load is obtained by PSCAD simulation, from which a more general situation is educted.Thirdly, On the basis of locomotives and traction mainstream model, a dynamic model of traction station, analyzes the mechanism and pass a comprehensive energy law traction station quality issues raised starting from the perspective of the dynamic characteristics of power quality based on support vector machines the power quality classification and assessment methods, the introduction of the relaxation factor to establish the optimal classification face, choose Gaussian kernel function as the basis for decision-support vector machine is given, the establishment of a sound station electrified railway traction power quality rating methods, and the method was validated.Fourthly, Hybrid locomotive actual load for the study, the introduction of scheduling, working conditions, load and other factors that will contain multiple electrified railway locomotives comprehensive evaluation and analysis of power quality problems, based on dynamic characteristics of the double Fourier analysis of indicators and support to the classification theory methods for comprehensive power quality classification. To study the dynamics of a typical power quality compensation device, the device will be different compensation corresponding to different types of comprehensive power quality problems, to establish economic, safe and practical multi-objective optimization function, based on a comprehensive assessment of power quality classification results, configure the power quality compensation devices and optimize their capacity, proposed compensation scheme optimized to achieve intelligent electrified railway power quality flexible adjustment.At last, an assessment of the electrified railway in China is made. And the trends of power quality management are analyzed.In conclusion, the typical power quality problems of electrified railways are studied by theoretical analysis and simulation in this paper. And all the results are verified in the Houfeng railway station on Fu-Xia Line.更多还原