Introduction   The construction of battery energy storage power stations is an inevitable trend in the future. The research aims to learn the economic and operational benefits of battery energy storage power stations under the present battery technologies and peak-valley price policy.

    Method   For the grid-side energy storage power stations, the economic benefit index was used as the criterion to measure the economic benefit, and the delayed substation expansion was used to measure the operational benefit. Taking battery energy storage power stations in Dongguan as an example, the direct economic benefits, operational benefits, and other benefits were analyzed.

    Result   The results showed that under the present battery technologies and peak-valley price policy, generally the economic benefits of battery energy storage power stations in Dongguan suffered slight loss. Nevertheless, considering other operational benefits of the construction of energy storage power stations, the development of battery energy storage power stations can produce a small profit.

    Conclusion   The case study of economic and operational benefits of battery energy storage power stations in Dongguan can provide a reference for the benefit analysis of other battery energy storage power stations of the same type.