电气化铁路与风电集中接入电网的仿真研究

发布时间：2018-08-06 12:35

【摘要】：随着我国风电装机容量和铁路网规模的不断扩大,很多地区出现电气化铁路与风电集中接入电网同一公共连接点的情况,由此引发了一系列的问题,尤其是电铁的电能质量问题对风电机组稳定运行的影响值得关注。本文通过在Matlab/Simulink平台建立模型,仿真研究高速铁路和含风电的电力系统之间相互影响。主要内容如下:首先,介绍高速铁路牵引供电系统,包括牵引变压器、AT供电方式、全并联复线AT供电方式牵引网及其建模方法;结合实际量测数据分析高铁牵引供电系统的负荷特性,并阐述电气化铁路引起的谐波和负序问题对风电机组的影响。然后,介绍高速列车牵引传动系统。先总体介绍交流牵引传动技术;然后介绍二电平四象限脉冲整流器;基于列车牵引计算和牵引-制动特性曲线,给出变流器直流环节等效电流负荷的计算方法;结合SPWM调制原理和调制度的定义,给出计及载波幅值的瞬态直接电流控制策略,明确了调制波幅值的比例系数计算原理。建立电铁和风电集中接入电网的仿真模型,包括基于LX高铁NRF牵引变电所的牵引供电系统模型、CRH5型高速列车变流器直流环节等效电流负荷模型和含风电的电力系统模型。最后,利用电铁和风电集中接入电网的模型进行仿真研究,验证了高铁牵引供电系统的负荷特性;分析了电铁接入、列车不同运行速度下和再生制动工况下电铁对含风电的电力系统的影响,以及在不同的风电场规模和风速下,电铁和含风电的电力系统之间的相互影响;并对抑制影响的措施进行简要的探讨。
[Abstract]:With the continuous expansion of wind power capacity and railway network in China, many areas have the same public connection point of electrified railway and wind power, which has caused a series of problems. Especially, the influence of electric power quality on the steady operation of wind turbine is worthy of attention. In this paper, the interaction between high speed railway and wind power system is simulated by building a model on Matlab/Simulink platform. The main contents are as follows: firstly, the traction power supply system of high-speed railway is introduced, including the AT power supply mode of traction transformer, the AT power supply network of all parallel double lines and its modeling method. Combined with the actual measurement data, the load characteristics of the traction power supply system are analyzed, and the influence of the harmonic and negative sequence problems caused by the electrified railway on the wind turbine is expounded. Then, the traction transmission system of high speed train is introduced. First, the AC traction drive technology is introduced, then the two-level four-quadrant pulse rectifier is introduced. Based on the train traction calculation and tractor-braking characteristic curve, the equivalent current load of DC link of the converter is calculated. Combined with the definition of SPWM modulation principle and modulation system, the transient direct current control strategy with carrier amplitude is given, and the calculation principle of the ratio coefficient of modulation amplitude is defined. The simulation model of centralized connection of electric railway and wind power to the power network is established, including the traction power supply system model based on LX high-speed rail NRF traction substation and the equivalent current load model of DC link of converter of CRH5 high-speed train and the power system model with wind power. Finally, the load characteristics of the high speed traction power supply system are verified by using the model of centralized connection of electric rail and wind power to the power network, and the electric rail access is analyzed. The influence of electric rail on the power system with wind power under different operating speeds and regenerative braking conditions, and the interaction between electric rail and power system with wind power under different wind farm scale and wind speed; The measures to restrain the influence were also discussed briefly.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM743

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