共查询到20条相似文献,搜索用时 187 毫秒
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为对高度非线性化的燃气轮机起动过程进行精确模拟,在准定常假设条件下通过给定升转速率,对起动方程右侧进行线性化处理,实现起动过程的类稳态仿真。给出了采用该方法进行起动仿真的设计流程,并进行了不同压气机角度调节规律、不同起动机功率的仿真优化分析。仿真结果与试验数据对比分析表明:升转速率、转速、工作线及起动时间等主要参数与试验数据具有较好的一致性,燃气轮机性能及各截面参数变化趋势符合工程实际。 相似文献
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采用容积法建立了非迭代和模块化的燃气轮机实时模型,并提出其实时求解算法;同时还建立了通用的燃气轮机控制器在回路的实时仿真平台,并在PC机上获得了高精度实时时钟.基于该实时模型和平台,进行了高、低压压气机和涡轮共轴的燃气轮机起动、升降负荷和甩负荷仿真试验,并通过整定PID控制器参数获得了理想的燃气轮机动态响应特性.结果表明:该实时模型、算法和平台可满足高精度燃气轮机控制器在回路的仿真需要,具有工程应用价值. 相似文献
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在GTD-350燃气轮机起动系统中,用可编程控制器(PLC)起动系统控制电路设计起动的时序逻辑控制程序,实现了燃气轮机起动过程的自动控制。 相似文献
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某型船用燃气轮机起动过程故障分析 总被引:1,自引:0,他引:1
某型船用燃气轮机由冷态起动至慢车工况,经历电机起动、空气压缩、点火燃烧、涡轮升速等过程。起动过程由静态到动态,由电能和燃油的化学能转化为涡轮的机械能,是一个发生急剧物理化学变化的过程,同时也是发动机最容易发生故障的过程。在分析该型燃气轮机起动过程特点的基础上,重点分析了起动过程中可能产生的故障类型和原因。通过典型故障分析,提出了实际操纵运行中的注意事项和建议。 相似文献
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大容量超临界直流锅炉锅内过程全工况实时仿真数学模型及动态特性 总被引:1,自引:0,他引:1
在分析苏制500MW超临界压力直流锅炉结构和特性的基础上,从设备的工作机理出发,以质量、能量、动量守恒定律为依据,建立了适用于超临界压力直流锅炉的水冷壁、过热器、点火分离器等设备的全工况算法。并采用模块化的建模技术,在华北电力大学仿真与控制研究所研制的STAR—90仿真平台上建立了苏制500MW超临界压力直流锅炉锅内过程的全工况的实时仿真数学模型。该模型能够准确地模拟实际机组的启、停过程和可能发生的故障。进行了给水量扰动、功率扰动和燃料量扰动的动态实验。实验结果表明:所建立的苏制500MW超临界压力直流锅炉全工况的实时仿真数学模型具有良好的动态特性。图5表4参6 相似文献
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Simulations and field tests of a reactor coolant pump emergencystart-up by means of remote gas units
《Energy Conversion, IEEE Transaction on》1992,7(4):691-697
The problem of the emergency start-up of a nuclear reactor coolant pump (RCP) by means of remote gas turbine power plant units is analyzed. A simulation model was developed which enabled a detailed simulation of the transient process occurring at the start up. The start-up of the RCP motor set was simulated for the cases of one and two gas units. Field tests were performed and the measured variable values agreed with the simulation results. Two gas units have been determined as a safe start-up scheme for the RCP motor set meeting the stringent protection restrictions imposed on the voltage and currents of the RCP and on 6.3 kV busbars of the safety-related house load. A model for deep rotor bars was experimentally confirmed as an effective means of the RCP motor set start-up transient simulation. Start-up procedures have been designed and adopted to conform to the safety procedures of a nuclear power plant 相似文献
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本文建立了超临界直流锅炉启动过程汽水膨胀的计算模型,并用试验进行了验证。利用该模型哈尔滨锅炉厂开发设计的600MW超临界直流锅炉冷态,热态过程的汽水膨胀,为锅炉启动系统设计及拟定启动曲线提供了依据。 相似文献
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A spatially resolved fuel cell stack model with gas–liquid slip phenomena for cold start simulations
Tian Tang Steffen Heinke André Thüring Wilhelm Tegethoff Jürgen Köhler 《International Journal of Hydrogen Energy》2017,42(22):15328-15346
This paper proposes a novel fuel cell stack model for system simulation of the cold start operation. The stack model features the option of spatial resolution in two directions and can simulate two-phase effects that are prone to occur during cold start. These effects include: the sorption process in the triple-phase zone between the membrane and the catalyst layer; the condensation, freezing and evaporation in the porous layers; the two-phase flow in the gas channels with a gas–liquid slip model. Compared to a 0D lumped model, the proposed stack model provides a more detailed view of the onset of freezing and liquid saturation. In a freeze start simulation from ?20 °C, the Rapid-Warmup-Operation published by Naganuma et al. [1] is applied and demonstrated as an effective way to quickly elevate stack temperature to +5 °C within 30 s. The stack model illustrates in detail the physical phenomena in the cold start and can be further integrated into a powertrain model for drive cycle analysis. 相似文献
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利用韦伯(Wiebe)模型、Watson模型、Whitehouse-Way模型以及化学动力学着火模型模拟计算了DME发动机的燃烧放热率,并将模拟计算结果与试验结果进行了对比。在对喷油正时、燃烧始角、循环供油量以及燃料热值等计算初始参数进行适当调整的基础上,上述模型的模拟计算结果与DME发动机实测数据基本吻合,说明上述各模型不仅适用于柴油发动机的性能预测分析,亦适用于DME发动机运行参数的预测。 相似文献