3STD-SES: Secure sharing scheme of trusted data of shared energy storage towards renewable energy accommodation scenario in a blockchain environment

With the increase of the renewable energy installed capacity, shared energy storage (SES) has played an important role in the renewable energy accommodation scenario. Decision-makers need to analyze renewable energy accommodation capacity of SES using user data, but privacy concerns prevent data sharing, and authenticity risks exist. Given this background, a Secure Sharing Scheme of Trusted Data of SES (i.e., 3STD-SES), which combines with blockchain and a fully homomorphic encryption scheme, is proposed for guaranteeing data privacy and data authenticity in the statistical process of the accommodated renewable energy. Firstly, an SES operation framework based on power blockchain is presented, and on this basis, the generation, storage and sharing mechanisms of trusted data of SES are designed, which create a traceable and verifiable trust chain for the shared data. Secondly, a homomorphic encryption-based scheme counts accommodated energy without exposing raw data, which can fully preserve the privacy of SES users. Finally, the actual data from an SES trading pilot project in Qinghai, China, is taken as an example to verify the feasibility and applicability of the proposed scheme. The results show that 3STD-SES can enable decision makers to obtain the authentic, accurate and integral accommodated renewable energy with the privacy protection of SES users, and meet security requirements in the field of data sharing for the SES business model.