永磁同步发电机、风轮机、蓄电池的风电系统中,为最佳能量管理设计的新型控制器

New Controller for Best Energy Management in Wind Power System of PMSG, Wind Turbine and Battery

为开发可再生能源并将其联网,以提供可靠、安全又有效的电源,对大型风轮机的最佳控制是关键性问题。本文,为风轮、发电机和蓄电池储能这一风电系统实现最佳管理与稳定运行,提供了一个新的监管控制系统。该相互协调的控制器,可以缓解因风速中断和负荷变化导致的有功功率与无功功率的干扰。而且,其控制策略能确保直驱式风轮机提取最大功率的能力。这一监督管理的控制器由3个子系统组成:第一个是在可变的风速下用于跟踪最大功率点;控制算法使用了模糊逻辑控制器和二级滑膜控制器,以便有效地实现这一目标;第二个的任务是保持所要求的直流环电压水平,是利用DC-DC变换器实现,控制储能蓄电池中的双向功率流动来达到;最后,对于二级滑膜控制器进行研究,以实现对电网有功和无功功率量的平缓调节,由此衰减存在于电网的谐波,与通用的一级滑膜控制器比较,效果更好。利用MATLAB模拟链,在不同的风速下完成了广泛的模拟研究,结果证实了新的监管控制系统的可行性和有效性。

To develop and connect renewable energy, the best control of large wind turbine is a key problem to supply reliable, secure and efficient power. This paper provides a new supervisory controlling system for the best management and stable operation of wind turbine, generator and energy storage. This coordinated controller is able to relieve the interference of active and reactive power resulting from wind break and load variation. Besides, its controlling strategy can ensure max power of direct-drive wind turbine. Such controller consists of three subsystems. The first is used to track max power with variable wind speed, which can be realized by controlling algorithm using fuzzy logic controller and secondary synovial controller. The second is to keep the required DC loop voltage, realized by DC-DC converter to control the battery＇s bi-directional power flow. The last is to realize the smooth regulation of active and reactive power to decrease the harmonic wave in grid according to the research on secondary synovial controller, which is more efficient compared with primary synovial controller. Furthermore, extensive simulation studies have been conducted under different wind speed with MATLAB simulation chain, which confirms the feasibility and efficiency of the new supervisory controlling system.