基于预招标的月度偏差电量平衡机制及其多周期发电调度优化模型

A Monthly Balancing Mechanism Based on Pre-bidding and Its Multi-period Generation Schedule Optimization Model

我国以年度和月度电量为交易标的物的中长期电力直接交易市场中,传统的偏差电量平衡机制注重于调度的灵活性,未充分考虑偏差调整的经济性。随着各省大用户直接交易电量规模的不断扩大,传统方式已很难满足市场运行对于公平性和经济性的双重需要。该文设计一种基于预招标的月度偏差电量平衡机制,能够实现月度偏差电量调整成本的最小化以及低成本机组对高成本机组的替代发电,有效提高系统运行的经济性;根据所设计的偏差电量平衡机制,该文考虑月度和日前用电需求预测偏差、机组运行约束、电网运行约束等因素,建立月度预发电计划滚动修正、日前发电计划优化、日内发电计划调整的多周期发电调度优化模型;最后,通过IEEE-30标准节点系统的算例仿真,验证了所提机制及模型的有效性。

Under the medium-and long-term power direct trading market in China, the traditional monthly balancing mechanism mainly focuses on flexibility and does not fully consider economy. As the scale of direct trading continues to expand, the traditional way can hardly meet the dual needs of market operation for fairness and economy. A new balancing mechanism based on pre-bidding was designed to deal with monthly energy deviation, which can minimize the cost of monthly deviation adjustment and replace the generation of high-cost units with low-cost units, thus effectively improving the economy of system operation. Under the designed balancing mechanism, a multi-period model including monthly generation schedule rolling model, day-ahead generation schedule optimization model and intraday generation schedule adjustment model was established, considering the factors of load forecast deviation, unit operation constraints and grid operation constraints. Finally, the effectiveness of the method and the model is verified through the IEEE 30-bus system simulation.