电力系统典型冲击负荷特性分析及其建模研究

发布时间：2018-05-20 18:55

本文选题：冲击负荷 + 负荷建模　；参考：《华北电力大学》2014年硕士论文

【摘要】：随着现代工业的快速发展,电力系统中整流设备、电弧炉、电气化铁路牵引负荷等大容量、非线性电力负荷持续增加。这类电力负荷在时间上存在很强的不确定性,在效果上具有很强的冲击性,在启动时会产生较大的瞬时功率,其值通常是额定功率的若干倍甚至数十倍。这种情况会导致电力系统发生瞬时过载现象,很大程度上影响地区电网的稳定性。因此,研究刻画电力系统中典型冲击负荷特性,建立准确合适的电力负荷模型,并分析其对区域电网影响是十分必要的。本文首先总结分析了电力负荷建模传统方法的优缺点和适用性,总结了用于负荷建模的各种静态、动态负荷模型结构,以便提出合适的冲击负荷模型。其次,分析一种典型冲击负荷——牵引负荷的组成,根据相关数据得出机车通过牵引变电站供电范围时的功率曲线,提出电气化铁路冲击负荷模型。然后,研究了电力用户中电弧炉冶炼硅铁,电解铝和电气化铁路机车的冲击负荷生产特性、工艺流程、冲击负荷特点及其可能会对地区电网产生的影响。最后,利用MATLAB建立正确而精准的冲击负荷模型后,对冲击负荷对地区电网影响进行仿真和分析。
[Abstract]:With the rapid development of modern industry, the large capacity of rectifier equipment, electric arc furnace, electrified railway traction load and so on, the nonlinear power load continues to increase. This kind of power load has strong uncertainty in time, strong impact in effect, and large instantaneous power during start-up, which is usually several times or even tens times of rated power. This situation will lead to transient overload of power system, which greatly affects the stability of regional power system. Therefore, it is necessary to study and depict the typical impact load characteristics of power system, establish an accurate and appropriate power load model, and analyze its impact on regional power network. In this paper, the advantages and disadvantages and applicability of the traditional methods of power load modeling are summarized, and various static and dynamic load model structures for load modeling are summarized in order to propose a suitable impact load model. Secondly, the composition of a typical impact load-traction load is analyzed. According to the relevant data, the power curve of locomotive passing through traction substation power supply range is obtained, and the electrified railway shock load model is put forward. Then, the production characteristics, technological process, impact load characteristics and possible effects of electric arc furnace smelting ferrosilicon, electrolytic aluminum and electrified railway locomotives are studied. Finally, the impact of impact load on regional power network is simulated and analyzed by using MATLAB to establish a correct and accurate impact load model.
【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】：TM714

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