微型电脑应用

针对高比例新能源并网会破坏电网稳定性的问题，提出一种基于构网型储能系统的虚拟惯量控制策略。在考虑电网频率改变量构建风力发电机虚拟转动惯量的情况下，依据同步发电机的惯性响应过程构建下垂控制、最大功率点追踪(MPTT)控制相结合的风电机组惯量控制策略。同时，基于蓄电池和超级电容器构建相应的虚拟惯量，设计对应的光储能虚拟惯量控制策略，并将风电控制策略和光储能控制策略相结合，得到风—光相结合的虚拟惯量控制策略。实验结果表明，所提控制策略在负荷突然增大的情况下，频率降幅最低为26.3%,且功角的振动幅度最低。在发生故障被切除时，功角首摆的振动幅度最低为41.0°,能够提高电网的频率稳定性和功角稳定性。

In response to the problem that a high proportion of new energy grid connection may disrupt the stability of the power grid, this paper proposes a virtual inertia control strategy based on the grid-forming energy storage systems. A wind turbine inertia control strategy combining droop control and maximum power point tracking(MPTT) control is proposed based on the inertia response process of synchronous generators, after considering the virtual moment of inertia of wind turbines constructed by the frequency change of the power grid. At the same time, corresponding virtual inertia is constructed based on batteries and supercapacitors, and a corresponding optical energy storage virtual inertia control strategy is designed. The wind power control strategy and optical energy storage control strategy are combined to obtain a wind optical virtual inertia control strategy. The experimental results show that the proposed control strategy has the lowest frequency reduction of 26.3% and the lowest power angle vibration angle when the load suddenly increases. When a fault is removed, the vibration angle of the power angle head swing is the lowest at 41°, which can improve the frequency stability and power angle stability of the power grid.