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火电厂凝汽式汽轮机冷端运行优化研究 总被引:1,自引:0,他引:1
针对目前国内凝汽式汽轮机冷端系统运行优化存在的问题,从电厂汽轮机冷端系统实际出发,在确定凝汽器的最佳真空和最佳冷却水量时,除考虑了传统的因素外,还考虑水资源使用费用和冷却水热污染的环保费用,使冷端系统运行优化更加贴合实际。研究过程中,并以国产600MW凝汽式机组为例,对汽轮机冷端系统进行了运行优化分析和计算,收到了满意的效果。 相似文献
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冷端系统是火电厂发电机组重要的辅助系统,它的工作状态和运行特性对整个电站机组的稳定性、安全性和经济性都有较大的影响。对某660 MW超超临界机组两台循环水泵电机进行改造,增加了循环水泵运行方式(单机运行时一小、一大、一大一小;双机运行时二小、一大一小、二大、二大一小);建立了机组冷端性能分析计算模型,结合实际运行状况,给出了不同负荷、不同温升等工况下循环水泵组合优化运行方式;针对机组频繁启停状况,通过合理利用运行机组循环水,达到降低开停机过程循环水泵耗电量的目的。研究为同类机组冷端系统运行方式提供借鉴。 相似文献
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Cold-end systems are heat sinks of thermal power cycles, which have an essential effect on the overall performance of thermal power plants. To enhance the efficiency of thermal power plants, multi-pressure condensers have been applied in some large-capacity thermal power plants. However, little attention has been paid to the optimization of the cold-end system with multi-pressure condensers which have multiple parameters to be identified. Therefore, the design optimization methods of cold-end systems with single- and multi-pressure condensers are developed based on the entropy generation rate, and the genetic algorithm (GA) is used to optimize multiple parameters. Multiple parameters, including heat transfer area of multi-pressure condensers, steam distribution in condensers, and cooling water mass flow rate, are optimized while considering detailed entropy generation rate of the cold-end systems. The results show that the entropy generation rate of the multi-pressure cold-end system is less than that of the single-pressure cold-end system when the total condenser area is constant. Moreover, the economic performance can be improved with the adoption of the multi-pressure cold-end system. When compared with the single-pressure cold-end system, the excess revenues gained by using dual- and quadruple-pressure cold-end systems are 575 and 580 k$/a, respectively. 相似文献
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The operation condition of the cold-end system of a steam turbine has a direct impact on the economy and security of the unit as it is an indispensible auxiliary system of the thermal power unit. Many factors influence the cold-end operation of a steam turbine; therefore, the operation mode needs to be optimized. The optimization analysis of a 1000 MW ultra-supercritical (USC) unit, the turbine cold-end system, was performed utilizing the back propagation (BP) neural network method with genetic algorithm (GA) optimization analysis. The optimized condenser pressure under different conditions was obtained, and it turned out that the optimized parameters were of significance to the performance and economic operation of the system. 相似文献
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研究了垃圾电站并入配网后的无功优化问题,提出了基于垃圾热值的发电数学模型,分为焚烧发电和沼气燃料电池发电两类.据此模型提出了一种新的配电网无功优化模型,该模型把垃圾处理量作为附加控制变量,把垃圾处理能力作为新的约束条件.在求解方法上,采用小生境粒子群算法进行求解,得到了含有垃圾发电的配网无功优化方案.算例表明,提出的垃圾发电模型和无功优化模型具有较好的准确性和实用性,对垃圾电站的进一步研究具有一定的参考价值,且垃圾发电较燃煤发电具有更好的经济性和环保性,也为垃圾发电在其它方面的应用提供了一些理论依据. 相似文献
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近年来,风储联合发电系统取得了一定的发展,但在网络约束下的储能系统储放范围与风电渗透率之间存在着制约的关系,导致原有调峰资源的配置方案会对储能系统的储放空间及运行效率产生一定的影响。为解决该问题,文章引入风储联合系统接入配网后的多维运行边界并将其转化为调峰资源优化配置过程中的约束条件,建立综合考虑风储容量与调峰资源经济性的优化配置模型并进行求解。仿真算例验证结果表明,文章提出的考虑风储多维运行边界下调峰优化配置模型可实现风电与储能利用最大化及调峰资源配置经济性最优。 相似文献
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根据温州电厂历年来制粉系统的运行单耗大幅度降低的特点,详细分析了降低制粉单耗的方法和措施,对同类型机组降低电耗有参考意义。 相似文献