考虑电能与备用联合出清的日前调度优化方法

为解决电力现货市场与辅助服务市场改革不断深入带来的日前调度计划编制模式转变问题,提出了一种考虑电能与备用辅助服务联合出清的日前调度优化方法。首先,剖析了电能与备用辅助服务之间的耦合关系,从机组运行特性和电网承载能力两个维度出发明确了电能与备用联合出清中需要考虑的运行约束项。接着,以综合购电成本最低为优化目标,全面考虑电网运行、电力平衡、机组运行等三方面约束条件,构建了电能与备用辅助服务联合出清下的日前调度优化模型。并根据模型特点,明确了求解方法。最后基于我国某省区电网实际数据构造的算例表明,该方法能够有效提升发电资源调用效率,避免由于备用均摊等方式造成的发电机组中标量超过系统承载能力或发电机组发电能力的问题。

A Day-Ahead Optimization Scheduling Method Considering Combined Clearing of Electric Energy and Reserve Auxiliary Service

In order to solve the problem of day-ahead scheduling mode transformation brought by the deepening reform of the spot market and auxiliary service market, a day-ahead scheduling optimization method considering the combined clearing of electric energy and auxiliary service is proposed. Firstly, the coupling relationship between electric energy and reserve auxiliary service is analyzed, and the operational constraints to be considered in the joint clearing of electric energy and standby are clarified from the two dimensions of unit operation characteristics and power network carrying capacity. Then, taking the lowest comprehensive power purchase cost as the optimization target, and considering the constraints of power network operation, power balance and unit operation, the day-ahead dispatching optimization model of combined power and standby auxiliary service clearance is constructed. According to the characteristics of the model, the solution method is put forward. Finally, a case study based on the actual data construction of a provincial power grid in China shows that this method can effectively improve the efficiency of power generation resource utilization and avoid the problem that the scalar quantity in the generator sets exceeds the load capacity of the system or the generating capacity of the generator sets caused by standby equalization.