中文摘要：

变速恒频风电机组转子动能被变频器与电网＂隔离＂,使得其对电网贡献的惯量几乎为零。随着风电渗透率不断提高,电网的频率稳定性问题也随之加大。因此各国风电并网导则均明确要求风电场需具有参与系统频率调整的能力。由于风电场内部机组数量庞大,机组间运行工况不一致,风电场层面的控制仍具有很大难度。为此文中定义风电–储能系统的虚拟惯量,研究储能装置协助风电场进行惯量补偿的容量要求,并基于模糊逻辑控制提出一种利用储能装置补偿风电场惯量的控制策略。仿真研究表明：所提虚拟惯量补偿策略能够有效补偿风电场虚拟惯量、协调风电–储能系统和常规电网之间的能量交换,使风电场迅速响应系统的频率变化,从而有效地提高大规模风电场接入系统的频率稳定性。

英文摘要：

The wind farm equipped with variable speed fixed frequency wind turbines has no inertia contribution to the power grid since the generator＇s rotor kinetic energy is‘isolated＇ to the grid by the converter. High penetration of wind power in power grid would seriously affect the frequency safety. So the wind power grid codes worldwide explicitly require that the wind farm must have the ability to participate in the frequency regulation of the power system. But the control strategy for wind farm participating in the frequency regulation is difficult to achieve because a large number of units within a wind farms operate in different conditions. Based on this, this paper defined the virtual inertia of a system with both wind power and energy storage device, analyzed the energy storage capacity required to assist wind farms inertia compensation, and proposed a control strategy based on fuzzy logic inference to improve wind frame＇s inertia with energy storage device. The simulation results show that the proposed control strategy could compensate the inertia of wind farms,coordinate energy exchange between the wind-energy storage system and the conventional grid, so that the wind farms have abilities to quickly respond to the frequency variation,effectively improve the frequency stability of the power system integration of large-scale wind farms.