基于模糊控制的海流发电系统能量管理

Energy Management of Marine Current Power Generation System Based on Fuzzy Logical Control

海流流速的波动导致海流发电功率的波动,采用钒电池和超级电容组成的混合储能系统改善电能质量,平滑海流发电功率。随着大功率海流发电系统的研究和商用,储能系统的容量也随之不断增大。为降低储能系统中超级电容组的额定容量,提出了基于模糊控制的低通滤波优化算法的能量管理策略,并搭建了3 MW海流发电系统仿真模型。仿真结果表明:所提出的能量管理策略可以有效降低超级电容组的额定容量,同时能够避免超级电容的过充与过放,使超级电容的荷电状态保持在合理范围内。

The fluctuation of marine current velocity leads to the fluctuation of power generation. The hybrid energy storage system composed of vanadium redox flow battery and super capacitor is used to improve the power quality and smooth the marine current power generation. With the research and commercialization of large scale power marine current power generation system, the capacity of energy storage system has been increasing. To reduce the rated capacity of super capacitor banks in energy storage system, an energy management strategy based on low-pass filter optimization algorithm of fuzzy control is proposed and the simulation model of 3 MW marine current generation system is built. The simulation results show that the proposed energy management strategy can effectively reduce the rated capacity of the super capacitor banks, avoid the over charge and over discharge of the super capacitor, and keep the state of charge(SOC) of the super capacitor within a reasonable range.