适应未来发展的直流配电电压等级序列研究

发布时间：2018-06-06 15:29

本文选题：直流配电 + 电压等级　；参考：《华北电力大学》2014年硕士论文

【摘要】：随着电网电力电子设备和间歇式电源增多,直流配电成为了引人关注的新课题。直流配电网的建设与应用,将会引发包括直流电力器具、直流电缆等设备的生产制造,直流配电网的结构和特性、建设和运行维护以及直流配电可靠性、安全性评价等一系列需要研究、解决的问题。其中,电压等级是直流配电系统构建的最重要环节。因为,电网建设之后很难再改变电压等级,尤其是形成了一定的规模再升压将带来巨大的损失及影响。因此,研究如何科学选取和评价直流配电电压等级是构建未来直流配电,以及直流配电能否健康、稳定发展的重中之重的研究课题,也将对未来直流电网的发展决策产生重要的影响。由于直流配电首先在城市轨道交通和舰船供电系统中得到应用。因此,本文第2章和第3章分析了城市轨道交通和舰船供电系统直流电压等级序列及其配电方案,包括从经济性、可靠性和适应性三个方面分别阐述了城市轨道交通直流电压等级的评价方法。第4章研究、确定了公共中低压直流配电的标准电压等级,分析了中低压直流配电标准电压等级的适应性；研究给出了换流站和直流线路可靠性的评价方法,以及标准电压等级经济性的评价内容、评价指标和评价方法。第5章针对研究、确定的直流配电标准电压等级,研究了标准电压等级与直流配电网结构的关系,分析、给出了标准电压等级的典型直流配电网结构,针对直流配电网应用前景和工程建设,对直流配电系统的各种电气设备以及运行、维护问题进行的研究和讨论,完善了直流配电构建体系。通过本文研究得到的主要结论包括：城市轨道交通直流电压等级的选择评价方法可供确定公共中低压直流配电电压等级借鉴,舰船电力系统的环境与陆地存在较大的差异,其评价方法对公共直流配电不适用；考虑兼容现有电缆,又能满足社会对电力负荷需求的不断增长,节能降耗,提高供电能力,本文建议公共直流配电中压标准电压等级为12kV或24kV,考虑兼顾国内外各行业直流配电电压等因素,建议低压标准电压等级为380V；标准电压等级可靠性及经济性指标评价,可参照城市轨道交通直流电压等级指标的评价方法,标准电压等级适应性指标评价,可采用本文提出的方法评价。
[Abstract]:With the increase of power electronic equipment and intermittent power supply, DC distribution has become a new issue. The construction and application of DC distribution network will lead to the production and manufacture of DC power apparatus, DC cable and other equipment, the structure and characteristics of DC distribution network, the construction and operation maintenance, and the reliability of DC distribution. Safety evaluation and a series of problems need to be studied and solved. Among them, the voltage level is the most important link in the construction of DC distribution system. Because it is very difficult to change the voltage grade after the construction of power grid, especially the formation of a certain scale of re-voltage will bring huge losses and impacts. Therefore, how to scientifically select and evaluate the DC distribution voltage grade is the most important research topic to construct the future DC distribution, and whether the DC distribution can develop healthily and stably. It will also have an important influence on the development decision of future DC network, because DC distribution is first applied in urban rail transit and ship power supply system. Therefore, in the second and third chapters of this paper, the DC voltage grade sequence of urban rail transit and ship power supply system and its distribution scheme are analyzed, including from the economy, The evaluation methods of DC voltage grade of urban rail transit are discussed in three aspects: reliability and adaptability. In chapter 4, the standard voltage grade of common medium and low voltage DC distribution is determined, the adaptability of medium and low voltage DC distribution standard voltage grade is analyzed, and the evaluation method of converter station and DC line reliability is given. And the evaluation content, evaluation index and evaluation method of standard voltage grade economy. In chapter 5, the relationship between the standard voltage level and the DC distribution network structure is studied, and the typical DC distribution network structure of the standard voltage level is given. In view of the application prospect and engineering construction of DC distribution network, the research and discussion on various electrical equipment, operation and maintenance of DC distribution system are carried out. The main conclusions obtained in this paper are as follows: the selection and evaluation method of DC voltage grade of urban rail transit can be used for reference in determining the public middle and low voltage DC distribution voltage grade. The environment of ship power system is different from that of land, and its evaluation method is not suitable for public direct current distribution. Considering the compatibility of existing cables, it can meet the increasing demand for power load, save energy and reduce consumption, and improve the power supply capacity. This paper suggests that the standard voltage grade of public DC distribution should be 12kV or 24kV, and that the standard voltage grade of low voltage should be 380V, that the standard voltage grade should be 380V, that the reliability and economic index of standard voltage grade should be evaluated, and that consideration should be given to the factors such as DC distribution voltage at home and abroad. It can refer to the evaluation method of DC voltage grade index of urban rail transit and the evaluation of adaptability index of standard voltage grade, which can be evaluated by the method proposed in this paper.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM721.1

【共引文献】