超级电容器在微网并网运行中的作用

为了解决微网中可再生能源的波动问题,以光伏发电、柴油发电机、蓄电池及超级电容器组成的微网为例,用频域方法分析了超级电容器在微网并网运行中的作用.基于给定的各分布式电源及其控制系统模型,从最大可控扰动频率、光伏发电最大准入容量以及全频段扰动抑制的角度,分析了超级电容器在微网运行中的作用.仿真和实证结果证明:超级电容器能提高微网中可控扰动频率,提高光伏发电准入容量,并对全频段扰动都有抑制作用.

Supercapacitor Effect in Grid-connected Microgrid

To suppress the fluctuation of the renewable energy in microgrid,the authors took a microgrid composed of photovoltaic generation,diesel generation,battery and supercapacitor as an example and analyzed the action of supercapacitor to suppress power fluctuation in microgrid by the frequency domain method. Based on the given distributed generations and their control system model,the supercapacitor effects in grid-connected microgrid were analyzed from the aspects of the most controllable fluctuation frequency,the largest access capacity of PV and the suppression effect in the whole frequency band of the frequency spectrum. The simulation and practical experiment results demonstrate that the supercapacitor can raise the controllable disturbance frequency in the microgrid,increase the PV penetration and suppress the fluctuation within the whole scale of frequency.