660MW机组不同变负荷速率下瞬态过程的能耗特性研究

发布时间：2018-06-17 23:39

本文选题：火电机组 + 瞬态过程　；参考：《中国电机工程学报》2017年19期

【摘要】：火电机组承担着调峰任务,大幅度变负荷成为其运行常态。为研究火电机组变负荷过程的能耗特性,该文以某660MW超临界机组为研究对象,采用GSE软件,建立了考虑机组蓄热和控制系统的动态模型,获得了不同变负荷速率下机组瞬态过程的能耗,并与稳态模型计算结果进行了对比。结果表明:在机组升负荷过程中,动态模型计算的平均煤耗率相比稳态模型最大增加了2.2g/(k W?h),而在降负荷过程中,动态模型计算的平均煤耗率相比稳态模型最大降低了2.04g/(k W?h)。不同变负荷速率下,动态与稳态模型计算的平均煤耗率差别不同:升负荷时,动态模型与稳态模型计算的平均煤耗率最多相差0.72g/(k W?h);降负荷时,动态模型与稳态模型计算的平均煤耗率最大相差0.27g/(k W?h)。
[Abstract]:Thermal power units undertake the task of peak-regulation, and large-scale load change becomes the normal operation. In order to study the energy consumption characteristics of a 660MW supercritical unit, a dynamic model of heat storage and control system is established by using GSE software. The energy consumption of the transient process of the unit at different load rates is obtained and compared with the calculation results of the steady-state model. The results show that the average coal consumption rate calculated by the dynamic model is the largest increase of the 2.2g/(k W / H, and the average coal consumption rate calculated by the dynamic model is lower than that of the steady-state model in the process of load reduction by the dynamic model compared with the steady-state model, and the average coal consumption rate calculated by the dynamic model is lower than that of the steady-state model. Under different load rate, the difference of average coal consumption rate between dynamic model and steady state model is different: the difference between dynamic model and steady-state model in average coal consumption is maximum when load is raised, and when load is reduced, the difference between dynamic model and steady-state model is maximum. The maximum difference of average coal consumption rate between dynamic model and steady model is 0.27g/(k.
【作者单位】：动力工程多相流国家重点实验室(西安交通大学);中国新时代国际工程公司;
【基金】：国家重点基础研究发展计划项目(973项目)(2015CB251504) 国家自然科学基金项目(51436006)~~
【分类号】：TM621

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