【作者】 向荣；

【导师】 王晓茹；

【作者基本信息】 西南交通大学 ， 电力系统及其自动化， 2011， 硕士

【摘要】 为消除风电波动对电网造成的不利影响,实现大规模风电并网并参与系统的频率控制,本文对并网风电场的有功功率及频率控制方法进行了研究。采用飞轮储能的控制方法有效地利用了飞轮储能系统(Flywheel Energy Storage System, FESS)的快速响应能力,在辅助风电场进行有功和频率控制时可以获得良好的控制效果。本文设计了基于永磁同步电机的飞轮储能系统。永磁电机采用矢量控制方法实现对电磁转矩准确有效的控制。设计了转速控制模块,以保证飞轮的安全运行。研究了飞轮储能系统辅助风电场进行有功功率及一次频率控制时的参考功率计算方法。飞轮储能系统根据参考功率的变化实现电机充放电运行状态的转化,通过对电网侧变流器的控制实现电网与该储能系统的能量交换及单位功率因数运行。变流器均采用空间电亚矢量(SVPWM)控制技术。在Matlab/Simulink中建立了该储能系统的控制模型,进行了风电场并网的有功及频率控制仿真,仿真结果显示该方法可以有效地平缓风电场的有功输出,减小电网的频率偏移。更多还原

【Abstract】 To eliminate the negative influence of fluctuating wind power on the grid, achieve the connection of large scale wind farm to power grid and make the wind power participate in the frequency control of the system, the active power and frequency control methods of grid-connected wind farm are studied in this paper. The control method by using flywheel energy storage could economize the fast response ability of flywheel energy storage system (FESS), and good control effect can be obtained when active power and frequency control of wind farm is conducted assisted by FESS.A permanent magnet synchronous motor based flywheel energy storage system is designed in this paper. Vector control method is adopted in the PMSM to achieve the accurate and effective electromagnetic torque control. Rotate speed control module is design to ensure the safe operation of the flywheel. The reference power calculation method of FESS when it assist wind farm with active power and primary frequency control is studied. The operation state of the FESS changes according to the change of reference power. And by controlling the grid side converter, the energy exchange between grid and storage system and unit factor operation are achieved. Space voltage vector control technology is adopted in both converters. Control models of FESS are established in Simulink, and simulation of active power and frequency control of wind farm are conducted. The result shows that this control method could effectively smooth the output of wind farm, and decreases the frequency deviation of grid as well.更多还原