| 引用本文: | 苏 杰,曾喆昭.基于ACPI的风力发电系统MPPT控制方法[J].电力系统保护与控制,2021,49(18):119-127. |
| SU Jie,ZENG Zhezhao.Maximum power point tracking based on auto-coupling PI control for a wind power generation system[J].Power System Protection and Control,2021,49(18):119-127 |
|
| 摘要: |
| 针对直驱永磁同步风力发电系统存在非线性、参数不确定性以及转矩扰动等问题，研究了一种基于自耦PI控制理论的最大功率跟踪控制方法。该方法以转速跟踪为目标，将发电机内部动态与外部输入转矩的不确定性定义为一个总和扰动，从而将非线性不确定系统映射为未知线性系统，并构建了一个在总和扰动反相激励下的受控误差系统。据此设计了基于误差速度因子的自耦PI控制器模型，理论分析了自耦PI闭环控制系统的鲁棒稳定性和抗扰鲁棒性。仿真结果表明了该控制方法能稳定保持最大功率系数，在风力发电系统的最大功率跟踪领域具有良好的应用前景。 |
| 关键词: 风力发电 最大功率跟踪 自耦PI控制 总和扰动 鲁棒稳定性 |
| DOI：DOI: 10.19783/j.cnki.pspc.201481 |
| 分类号: |
| 基金项目:湖南省教育厅重点项目资助(17A006) |
|
| Maximum power point tracking based on auto-coupling PI control for a wind power generation system |
|
SU Jie, ZENG Zhezhao
|
|
(School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha 410076, China)
|
| Abstract: |
| There are problems of nonlinearity, uncertainty parameters and torque disturbance in direct drive permanent magnet synchronous wind power generation systems. Thus a maximum power point tracking control method based on auto-coupling PI control theory is studied. Aiming at speed tracking, the uncertainty of internal dynamics and external input torque of a generator is defined as a total disturbance, and the nonlinear uncertain system is mapped to an unknown linear system, and a controlled error system under the inverse excitation of the total disturbance is constructed. Based on that, an auto-coupling PI controller model based on the error speed factor is designed, and the robust stability and anti-disturbance robustness of the autocoupled PI closed-loop control system are analyzed theoretically. Finally, the simulation results show that the proposed control method can maintain the maximum power factor in a stable fashion. This approach has a good prospect for application in the field of maximum power tracking of a wind power generation system.
This work is supported by the Key Project of Hunan Education Department (No. 17A006). |
| Key words: wind power generation maximum power point tracking autocoupled PI control total disturbance robust stability |
