汽轮发电机组经济性检修周期确定方法

Determination Method of Economic Maintenance Cycle on Steam Turbine Generator Unit

针对新型电力系统下煤电机组频繁宽负荷调节、长期超低负荷运行的现状,建立了汽轮发电机组能耗成本增加值的计算模型,提出了将能耗成本增加值、检修费用和供电效益损失作为检修成本,以单位发电量检修成本最低对应的检修间隔作为经济性检修周期的方法,从而考虑不同机组性能劣化规律的差异,有针对性地确定检;修周期。将该方法应用于某600 MW机组,分析了不同检修周期对运行成本的影响。

In view of the situation of frequent wide load regulation and long-term ultra-low load operation of coal motor units under new power system,the calculation model of the added value of energy consumption cost of steam turbine generator unit is established,and put forward method of taking the added value of energy consumption cost,maintenance cost and power supply benefit loss as the maintenance cost,and taking the maintenance interval corresponding to the lowest maintenance cost per unit power generation as the economic maintenance cycle.Thus,considering the difference of performance degradation law of different units,the maintenance cycle was determined pertinently.The method was applied to a 600MW unit,and the influence of different maintenance cycles on operation cost was analyzed.