Abstract: In this paper, the selection of technical solutions and the cost of Wind-PV-ES hybrid project are analyzed. The applicability of the existing tariff policy for the selected typical Wind-PV-ES hybrid project and the feasible pricing methods are discussed. Besides, the project's economy under different pricing methods is investigated and the influence of construction cost and electricity pricing on the project's economy is quantitatively analyzed by using sensitivity analysis method. The pricing mechanism for Wind-PV-ES hybrid project is also proposed. From the results, it can be concluded that package pricing can be used to the whole project in short term. While in long term, in order to ensure the price policy's incentive and promote fairness and efficiency, separate pricing should be used for the Wind-PV-ES hybrid project and the energy storage price policy should be introduced.

Key words: electric power, new energy, Wind-PV-ES hybrid project, technology, construction cost, pricing mechanism, economic evaluation