基于出力不均匀性的火电站电力电量平衡方法

Power and energy balance method of thermal power station based on uneven output

电力电量平衡计算对电力系统中设计电站的今后运行和在线运行电站的负荷分配、备用容量配置具有重要意义,同时能为合理利用水能资源以及化石能源、减少资源浪费、环保减排起到指导作用。针对电力系统年、月、日内的负荷变化以及在线运行电站对应的出力运行情况,分析系统负荷与电站出力的不均匀性之间的相关关系,通过水电站弃水或火电站增加出力的方法将电力系统月调节系数控制在一定范围内,从而使电力系统在年、月、日内达到电力电量平衡。改进火电站群电力电量平衡计算方法,根据逐次切负荷法的计算原理,通过对单一火电站工作容量以及其调峰容量的嵌套式迭代计算,得到每座火电站年、月、日的出力过程。算例结果验证了所提方法的正确性、可行性和有效性。

The calculation of power and energy balance is important to the future operation of designed power stations and the allocation of load and spare capacity of online operation power stations,and can guide the rational use of water resource and fossil energy,the reduction of resource waste and emission.According to the load variation within one year/month/day and the output of online operation power station in power system,the correlation of heterogeneity between system load and output of power station is analyzed.The monthly adjustment coefficient is controlled in a certain range by the method of water discharging in hydro power station and output increasing in thermal power station,thus the yearly/monthly/daily power and energy balance of power system can be achieved.The calculation method of power and energy balance of thermal power station group is improved,and according to the principle of successive load shedding,the yearly/monthly/daily output process of each thermal power station can be obtained by the nested iterative calculation of working capacity and peak shifting capacity of the power station.Case results verify the correctness,feasibility and effectiveness of the proposed method.