Wind/storage coordinated control strategy based on system frequency regulation demands
Yu Jiang, Chang Wang, Lin Xiao, Di Yu, Xiangyu Zhang
Abstract
In the power systems with high proportion of renewable power generation, wind turbines and energy storage devices can use their stored energy to provide inertia response and participate in primary frequency regulation for the improved system frequency stability. In this paper, the security constraint conditions in the system’s frequency response process are analyzed firstly, and then the system frequency regulation demand is evaluated. According to the system frequency regulation demand and the grid codes, an energy storage capacity configuration scheme is then proposed. To further explore the frequency regulation potential of renewable power generation, the coordinated control strategy adapted to wind power and energy storage is proposed, in which the controller parameters is adjusted according to the system frequency regulation demand. Finally, a high proportion wind power system is built in simulation platform to verify the effectiveness of the proposed strategy. The results demonstrate that under the proposed strategy, the wind turbines and energy storage devices can provide more reliable power response together, thus improving the total capability for the grid frequency support.