模糊控制理论在微网控制技术中的应用

Fuzzy Control Theory in Micro-grid Control Technology

微网控制策略是微网技术中最重要组成部分。由于各种分布式电源发电机制和环境不同,所需控制策略也不同。针对风力发电机、光伏发电等新能源发电具有间歇性,本文将模糊控制理论运用于控制系统中,利用参考电流和误差电流控制滞环环宽,使开关频率得到很好控制,从而有效控制了逆变器的输出电流。通过MATLAB/SIMULINK以及模糊控制块仿真,证明系统鲁棒性强,能提高电流跟踪精度和降低谐波,干扰和参数变化对其控制效果的影响减弱。

Micro-grid Control Strategy is one of the most important parts in Micro-grid Control Technology.Different control strategies are needed because of different generation mechanisms and environment in various distributed generations.Fuzzy control theory is used in control system in this paper as intermittent of new energy power such as wind turbines,photovoltaic power generation.Use reference current and error current to control loop width,so that the switch frequency is well controlled,and output current of inverter is also effectively controlled.Strong robustness of fuzzy control strategy is proved,and it improves the tracking accuracy and reduces the harmonic current by using MATLAB /SIMULINK and fuzzy control block,the effects of interference and parameters changes are also reduced.