中文摘要：

建立了瞬态过程工质蓄热模型、金属蓄热模型和煤耗计算模型，对某1000Mw机组瞬态工况试验过程进行了计算分析，得到了试验过程机组蓄热率和蓄热影响下机组发电标准煤耗增量曲线，分析了不同负荷下各受热面的蓄热分布情况，并与现场实测数据进行了对比．结果表明：机组总蓄热率与金属总蓄热率的变化趋势几乎一致，金属总蓄热率约为工质总蓄热率的1．5～2倍；工质蓄热率中水冷壁工质所占比例最大，过热器工质所占比例最小；受蓄热影响，机组升负荷试验过程中，发电标准煤耗最大增加了3．48g／（kW·h），而在降负荷试验过程中，发电标准煤耗最大减少了3．2g／（kW·h）．

英文摘要：

Models to calculate the coal consumption and heat storage rate of the working medium and metallic materials of a 1 000 MW power unit under trainent conditions were established, based on which, calculation and analysis were performed on the transient test process of the unit, so as to obtain the curves of standard coal consumption rate for power generation corresponding to the heat storage rate and under the heat storage effect during the test, analyze the distributions of heat storage on various heating surfaces at different loads, and to compare the test results with field data. Results show that the total heat storage rate of the unit varies in the same trend with that of metallic materials, and the latter is 1.5-2.0 times of the working medium. Water walls share the largest proportion in the heat storage of working medium, while superheaters share the least. Affected by heat storage, the standard coal consumption rate is at most increased by 3.48 g/（kW·h） during loading up period and decreased by 3.2 g/（kW·h） during loading down period.