Evaluation index system of shared energy storage market towards renewable energy accommodation scenario: A China’s Qinghai province context

With the ever-increased installed capacity of renewable energy generation units in a power system, the so-called shared energy storage (SES), a novel business model under the umbrella of the shared economy principle, has the potential to play an essential role in the accommodation of renewable energy generation. However, unified evaluation standards and methods, which can help decision-makers analyze the performance of the SES market, are still not available. In this paper, an evaluation index system of the SES market is designed based on the trading rules of China’s Qinghai province and the structure-conduct-performance (SCP) analytical model. Moreover, the definition and characteristics of the indices, which can show the performance of the SES market from different perspectives, are given. Furthermore, the ideal cases are presented as the evaluation benchmark based on the development expectation of the SES market, and the analytic hierarchy process (AHP) and the technique for order preference by similarity to an ideal solution (TOPSIS) are applied to evaluate the SES market comprehensively. Finally, a case study based on actual data of the SES trading pilot project in Qinghai shows that the evaluation index system can reflect the operation status, existing problems and influencing factors of the SES market.