两种第三方主体参与的现货市场出清模式比较

Comparison of two market clearing modes for day-ahead power market incorporating third-party entity

随着高比例新能源接入电力系统,常规机组开机减少,系统备用容量不足,需要充分挖掘第三方主体的备用能力。文中提出并比较了第三方主体参与备用辅助服务的2种现货市场出清模式:电能量和机组备用联合出清+第三方主体备用单独出清模式、电能量和两侧备用联合出清模式。首先结合市场发展阶段、备用资源紧缺程度等方面分析了2种出清模式的优缺点;然后,给出了2种市场模式下的出清模型,并分析了第三方主体参与对市场出清结果的影响及其费用和收益情况;最后,采用改进的IEEE 30节点系统进行了仿真,结果表明电能量和两侧备用联合出清模式可以更加充分调用第三方主体的备用,降低系统发电和备用总成本。

With more and more renewable generation integrated into power system,the number of thermal units decreased and their reserves are not enough,so it is necessary to utilize the reserve capacity from third-party entities.Two kinds of day-ahead power market clearing mechanism incorporating reserve ancillary service of third-party entities are proposed and compared in this paper.In the first clearing mechanism,energy and reserves provided by the thermal units are jointly clearing at first and then the reserves provided by third-party entities are cleared.In second clearing mechanism,joint market clearing mode for electric energy and reserve on both sides.At first,based on the aspects of market development stage and shortage of reserve,the advantages and disadvantages of 2 clearing modes are analyzed.Then the clearing models are presented and the impacts of third-party entity on bidding results in 2 modes is analyzed.Furthermore,the costs and benefits of different market members are analyzed.Finally,the numerical results of the modified IEEE 30-bus system are given to show that the reserves of third-party entities can be purchased fully to decrease total costs of generation and reserves under the second clearing mechanism.