In recent years, the expansion of renewable energy in electric power systems has been increasing at such a rapid pace that it has started affecting frequency stability. Renewable generators connected to the grid produce variable amounts of power, and in most cases have no inherent inertia response (IR) to the system frequency. Therefore, the high penetration of renewable generators in the system results in low inertia and frequency distortion. If renewable generators account for a high proportion of the supply in a power system, the use of energy storage systems (ESSs) with frequency-support algorithms (in the place of synchronous generators) can stabilize the network. The participation of ESSs in frequency support must be organized precisely, so that they are fully devoted to their own purpose. In this paper, the frequency-support parameters of ESSs are calculated for achieving stable frequency response from a network. An estimation and calibration process is conducted during the active power-order change of the ESSs in the substation, and is verified through electromagnetic-transients-including-DC (EMTDC)-based simulations.

中文翻译：

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可再生能源整合变电站储能系统的动态惯性响应支持

近年来，电力系统中可再生能源的扩展一直以迅速的速度增长，以至于已经开始影响频率稳定性。连接到电网的可再生发电机产生可变量的功率，并且在大多数情况下，对系统频率没有固有的惯性响应（IR）。因此，可再生发电机在系统中的高渗透率导致较低的惯性和频率失真。如果可再生发电机在电力系统中占很大比例，那么使用具有频率支持算法的储能系统（ESS）（代替同步发电机）可以稳定网络。ESS在频率支持方面的参与必须进行准确的组织，以便他们充分致力于自己的目的。在本文中，计算ESS的频率支持参数以实现来自网络的稳定频率响应。在变电站中ESS的有功功率有序变化期间进行估算和校准过程，并通过基于电磁暂态的直流（EMTDC）仿真进行验证。