A Green Power Traceability Technology Based on Timestamp in a Main-Side Chain System

With the low carbon emission target out of protecting environment, electric vehicle is a promising transportation tool. The number of electric vehicles is rising rapidly in recent years which creates lots of corresponding charging demands. With both users and charging piles rising, however, condition of charging pile and price of electricity in different district are not transparent for users. In order to promote the benign interaction of production, distribution and consumption of green power, merging blockchain technology is a promising strategy. Unchangeable and traceable property of blockchain can make green power traceable. In this paper, a green power traceable system based on blockchain technology is proposed for providing convenient green power charging services for users. This system consists of main chain, transaction side chain and data side chain. Through the three dimensions of quantity, price and time, the type of energy and the region can be traced. In this system, we proposed a fast tracing technology based on index by timestamp. Experiment contrast index technology with traversal and smart contact. It shows that index by timestamp technology is more effective than traversal and smart contract.