Research On Information Disclosure And Sharing Mechanism Of Shared Energy Storage For Renewable Energy Accommodation In Energy Blockchain Environment

Driven by the carbon peak and carbon neutrality target,the shared energy storage(SES)business model has made considerable progress in the renewable energy accommodation scenario,providing the significant regulation capability for power systems.However,with more and more SES resources for renewable energy accommodation,the competition in the SES market will become more intense,which results in the increased decision-making difficulty for the SES entities.Considering that the simplistic decision-making strategies may result in the wastage of resources and difficulties in cost recovery,SES entities urgently need to obtain more effective information to provide decision-making assistance.Therefore,it is necessary for SES to build an information sharing and disclosure mechanism that can promote the circulation and sharing of data elements and assist SES entities in making effective decisions,enabling the advantages and achieving the sustainable operation of SES.In the context of the commercial operation of advanced energy storage systems for renewable energy accommodation in China,the construction of the information exchange system,the evaluation of development and operation status and the estimation of operational benefits of the SES business model are studied in this thesis,improving the information sharing and disclosure mechanism of SES,where energy blockchain,cryptography,data-driven algorithms and data analysis techniques have been introduced.Based on the information sharing and disclosure mechanism,the decisionsupport information including the current development and operation status and future operational benefits of SES will be disclosed to promote the decision-making profits of SES entities and improve the overall operation level of the SES business model.The main work of this thesis includes:(1)A secure sharing mechanism of trusted data of SES based on energy blockchain and fully homomorphic encryption is proposed to address the problems of data privacy protection and data authenticity verification in the process of information exchange.Firstly,an operation framework of the SES business model based on the energy blockchain has been proposed.On this basis,taking the computation of the renewable energy accommodated by SES as a typical scenario,a secure sharing mechanism of trusted data of SES is designed to form a full-lifecycle trusted chain for the on-chain data of SES.Then,a fully homomorphic encryption-based secure sharing method is proposed and the smart contracts for the computation of accommodated renewable energy are designed.Finally,a simulation system of energy blockchain based on Hyperledger Fabric is built to carry out the effectiveness analysis of the proposed secure sharing mechanism under the node resource constraints combined with the actual data from the SES trading pilot project in Qinghai,China.Case studies illustrate that the SES operation organization can obtain authentic,accurate and integral accommodated renewable energy with the privacy protection of SES users,achieving the extraction of decision-support information under multi-party data sharing.(2)To meet the objective demand of SES entities to understand the development and operation status of the SES business model,a comprehensive evaluation system of SES based on the decentralized computation of evaluation indices is proposed under the data ownership mechanism.Firstly,a comprehensive evaluation index system of SES towards the renewable energy accommodation scenario is built.Then,in response to the multi-party data-driven computation requirements of evaluation indices under the data ownership mechanism,a contract-based decentralized comptation method of the comprehensive evaluation indices is proposed on the basis of the secure sharing mechanism of trusted data.Finally,a comprehensive evaluation method based on the fuzzy analytic hierarchy process and the improved technique for order preference by similarity to an ideal solution is designed.Case studies illustrate that the proposed comprehensive evaluation system can compute the comprehensive evaluation indices of SES under the condition of multi-party sharing of the private data,and thus achieve quantification and comparison of the development trend and operation situation of the SES business model.(3)An information disclosure mechanism for SES benefits considering the multisource meteorological information at multiple time scales is proposed to meet the need of SES entities for obtaining the information on the operational benefits of SES in future renewable energy accommodation scenarios.Firstly,a wind-solar meteorological regionalization strategy based on multi-source meteorological information is proposed.On this basis,a constructing scheme of multi-time-scale wind-solar meteorological information sets is designed.Then,a generation strategy of the probability scenarios for renewable energy accommodation is proposed considering the wind-solar power output and SES resource level.In this strategy,a probability scenario is composed mainly of the wind-solar power output scenario based on Bayesian optimization-based random forest regression model and the SES user scenario based on capacity simulation steps.Finally,a clearing model for peak-regulation ancillary service is built considering the energy storage sharing degrees.On the basis of the clearing results,the benefit indices that can characterize the operation states of SES in the renewable energy accommodation scenario are designed.Case studies illustrate that the proposed mechanism can provide the operational benefits of SES in the multiple time-scale renewable energy accommodation scenario at different resource levels,to assist SES entities in making effective decisions.The main work of this thesis is to provide decision-support information on the current development and operation status and the further operational benefits of SES in the renewable energy accommodation scenario on the basis of data circulation and sharing.The disclosed decision-support information can assist SES entities in making the investment,energy storage sharing,and rule revision decisions,improving decisionmaking efficiency and promoting the orderly development of the SES business model.