Abstract
Strategic choices for energy conservation, emission reduction and a low carbon society can be achieved when the renewable energy portfolio standards are implemented. It is an urgent problem that how to maximize the revenue of grid companies in medium and long-term transactions based on the renewable energy portfolio standards. The medium- and long-term trading model of grid companies based on contract transactions and centralized bidding transactions is established in this paper. The completion of renewable energy portfolio standards could be guaranteed by grid companies in accordance with green certificate transactions. The particle swarm optimization algorithm is used to resolve the problem on case study. The simulation results show that grid companies should shift their power purchase strategies in the context of renewable portfolio standard.
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