In order to further enhance the active power regulation capacity of China power grid, this paper analyzes the necessity of constructing accident reserve capacity of power grid under the new power system from the aspects of receiving terminal characteristics, new energy development and load fluctuation. In order to further improve the active power regulation ability of my country's power grid, the necessity of constructing the emergency reserve capacity allocation of my country's power grid under the construction of a new power system is analyzed from the aspects of receiving terminal characteristics, new energy development and load fluctuation.
Battery Energy Storage System (BESS) has been rapidly developed and widely used in power systems at home and abroad, but Bess has not deeply understood the impact of AC Short-Circuit Current in power system. And the existing short-circuit current calculation standards do not involve the short-circuit current analysis method considering the influence of Bess in case of AC system failure. Based on Bess electromagnetic transient model, this paper analyzes the influence mechanism of energy storage output current on AC short-circuit current under AC short-circuit fault. The research results provide a reference for reasonably evaluating the impact of energy storage on AC system short-circuit current and optimizing the setting of Bess control and protection parameters.
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