虚拟同步发电机惯量和阻尼参数模糊自适应控制策略

Fuzzy adaptive control strategy for inertia and damping parameters of virtual synchronous generator

为了提高虚拟同步发电机(VSG)控制方法在新能源系统并网时对系统的支撑能力,在传统VSG的基础上设计了一种VSG惯量和阻尼双参数模糊自适应控制策略,将系统角速度偏差及角速度偏差的变化率作为输入,经设计的模糊规则实现双参数自适应控制。在MATLAB/Simulink中建立数学模型,与传统VSG控制进行对比实验,结果表明模糊自适应控制策略在对抗干扰时可有效支撑系统的频率及抑制功率的波动,进一步提高了新能源并网系统的稳定性。

In order to improve the support ability of virtual synchronous generator(VSG)control method to the system when the new energy system is connected to the grid,a two-parameter fuzzy adaptive control strategy of VSG inertia and damping is designed based on the traditional VSG.The angular velocity deviation and the change rate of angular velocity deviation are taken as the input,and the designed fuzzy rules realize the two-parameter adaptive control.The mathematical model is established in MATLAB/Simulink and compared with the traditional VSG control.The results show that the fuzzy adaptive control strategy can effectively support the frequency of the system and suppress the fluctuation of power when resisting interference,and further improve the stability of the new energy grid connected system.