Abstract
The battery energy storage system is a flexible resource with dual characteristics of source and load. It can be widely used in renewable energy consumption, peak shaving and frequency modulation, virtual power plant, and so on. However, the safety problem of energy storage system used in power system is serious, and it should be given an attention. In addition to being affected by the external operating environment of storage system, the reliability of its internal electrical collection system also plays a decisive role in the safe operation of energy storage power station. Therefore, for the reliability problem of battery energy storage power station, this paper analyzes the collection system structure, reliability model, evaluation algorithm and index system, establishes the single state reliability model of battery module considering derating state, presents a framework of a differentiated two-layer reliability evaluation algorithm for collection system of energy storage power station. This paper’s literature investigation can provide a support for the reliability improvement of energy storage power station.
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