Abstract: As an important part of energy internet，micro-grid can facilitate the integration of distributed renewable energy
and the fusion of data centers.Furthermore，it can reduce carbon footprint by reduce the traditional energy consumption of
data centers.However，the potential security and privacy issues caused by opacity and uncertainty of energy market leads to
a lower renewable energy utilization and transaction rates. An opportunistic task scheduling strategy was introduced to
improve the utilization of renewable energy by dynamically adjusting the workload of data centers.In addition，a dynamic
smart contract formulation based on blockchain technology was proposed，which effectively reduces the expenses of users
and boost the interests of the operators. Finally，the strategy was verified upon power generation data from PV cells and
workload data from data centers.The simulation test shows that the method above can significantly improve the utilization of
renewable energy and optimize the revenue for both users and sellers.

Key words: micro-grid, distributed computing, energy trading, renewable energy, energy blockchain, data center