Abstract: The rapid development of smart grids has enhanced the communication between power companies and electricity users,making demand response for low-voltage users a highly promising smart grid service.In recent years,efforts to strengthen smart grid functionalities using blockchain technology have increasingly drawn attention.However,issues such as energy consumption and user privacy concerns introduced by blockchain have become unavoidable.This paper proposes a low-voltage user demand response solution based on a lightweight blockchain,which features low energy consumption and ensures user data privacy.To address the fairness issues in blockchain and data security concerns of the main chain arising from the low energy consumption and the lightweight blockchain structure,the paper further introduces illegal manipulation monitoring,distributed hash tables,and regional authentication algorithms to support the solution’s normal operation.The application of cloud computing in smart grids has also developed rapidly,as it can maximize resource integration and address the distributed computing challenges posed by the massive data in smart grids.

Key words: Cloud computing, Smart grid, Low voltage users, Demand response, Light weight blockchains, Data privacy, Low energyconsumption