编制直调火力发电单元月度电能交易计划的负荷率偏差法

Load ratio deflection method for making monthly trade schedule of directly dispatched thermal power generation units

对月度电能交易计划编制问题,实际电网通常采用平均分解的方式。该方式虽然简便易行,但考虑的因素不够全面或过于粗略,其计划编制结果往往容易增加后续日调度的难度。针对此现状,提出了一种负荷率偏差法,用于解决直调火力发电单元月度电能交易计划编制问题。该法首先考虑已经完成月份的年合同电量执行情况及后续月份发电单元检修与系统负荷系数分布情况,对计划月份进行年合同电量月分解值的滚动修正;其次,对计划月份,根据发电公司、电网公司和社会环境等综合成本指标排序的结果,在月平均负荷率的基础上,对不同发电单元的负荷率给予适当调整,以制定各发电单元的月度电能交易计划。计划结果既满足发电单元月发电总量约束,又兼顾了不同日的检修与负荷分布情况,同时还适当降低了系统的综合成本。算例结果表明,该方法合理有效。

For the problem of making monthly trade schedule of electricity energy, real electric power network usually uses average decomposition method. This method is simple, but it is ill-considered for factors, and its scheduling results usually make difficulty for continued daily dispatch. For this status, this paper proposes a new load ratio deflection method for making monthly trade schedule of directly dispatched thermal power generation units. The method first corrects monthly decomposition values of yearly contract volume for the scheduling month, according to the past months＇ finished volumes, maintenance schedules and load distribution factors of the continued months. Next, for the scheduling month, the method properly adjusts load rations of different generation units on the base of monthly average load ration, according to the rankings of integrative cost index of generation and network corporations, society and environment. The scheduling results with the method not only satisfies restriction of monthly volume, but also considers maintenance and load distribution, and decreases system＇s integrative cost. Example shows that the method is reasonable and effective.