Abstract:
Aiming at the problem of trading matching coordination caused by the volatility of renewable energy and the randomness of green energy users,a set of ramping energy market mechanism and its business model are proposed adapted to the participation of virtual power plants with aggregated flexible resources,in which the clean and flexible resources are allowed to be given priority to assist the safe and stable operation of power system. In the proposed mechanism,the ramping energy market is divided into two submarkets:conventional ramping units and third-party ramping units. In the latter,the virtual power plant operators are allowed to declare the quantity and price. Meanwhile,a priority clearing mechanism in accordance with the green energy consumption index and the response cost coefficient is proposed as well. The declared information is corrected according to the historical energy use of the virtual power plant’s proxy resources and the approval response cost,and the clearing sequence of the third-party market reflecting the green energy value and the resource response cost is obtained. Besides that,according to the proposed joint clearing mechanism of the traditional ramping units and the third-party market players,the clearing price of the traditional ramping energy market is transmitted to the thirdparty market as a price signal,and then clearing result is issued. By this,the competitive ecosystem for all of the ramping market units is constructed,thereby the better resources allocation is achieved. In addition, a variety of commercial operation models for virtual power plant oriented EVs to participate in the ramping energy market are designed,which improves the enthusiasm of demand-side resources.Finally,the given example verifies that the proposed mechanism reduces the system ancillary service cost,increases renewable energy consumption and achieves the green value certification,as well as meets the requirement of incentive compatibility,responds to fluctuation of renewable energy output and motivates the user’s willingness.