共查询到16条相似文献,搜索用时 353 毫秒
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针对单轴燃气轮机这样大型复杂且具有极强非线性的热力系统,利用Matlab/Simulink对某型单轴燃气轮机系统进行了仿真,并采用自适应多模型广义预测控制的先进控制方法对转速控制器进行了仿真分析。仿真表明,该控制方案对燃气轮机的转速控制取得了很好的效果,具有实际应用价值,为燃气轮机的转速控制提供了一种新的思路。 相似文献
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以某三轴燃气轮机作为研究对象,针对燃气轮机各工况下转速失稳、不同海况下的动力响应需求、外部干扰等因素对燃气轮机工作状态的影响问题,设计了基于Q-learning强化学习理论的控制策略,以智能算法在线调试代替人工手动调试过程,实现人工智能理论到工程实际的应用在进行软件层智能算法验证后,通过强化学习算法控制参数的自动优化完成了基于强化学习的转速控制策略硬件在环试验。研究表明:该设计算法可以在燃气轮机运行过程中判断触发、自我训练、自我调整控制参数,保证燃气轮机在各种突发情况下的运行稳定;在三轴燃气轮机转速失稳时,在较短时间内即可完成转速的回稳,并可将转速误差控制在2 r/min内,从而实现了转速失稳时的自救。 相似文献
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微型燃气轮机可变论域自适应模糊PID控制 总被引:2,自引:0,他引:2
微型燃气轮机是一个多变量、非线性的复杂系统,采用常规的控制方法仅能在其稳定运行时有较好的控制效果,而在负荷变化或特定工作点运行时,由于多种耦合限制的存在,往往难以取得令人满意的控制效果。基于微型燃气轮机发电系统的动态特性,在仿真平台上建立了含微型燃气轮机及发电系统完整的数学模型,并在模型中加入了可变论域自适应模糊PID(比例、积分、微分控制)控制环节,在燃气轮机孤网带载运行状态下,研究了燃气轮机的转速、燃料量、排气温度和机械转矩等动态特性。仿真结果表明:当负荷突变时,转速能够快速达到稳定且超调量不超过1.9%,燃料量在满载时能维持在1 p.u.附近,满足燃气轮机运行要求,具有稳态性能好、动态响应快和鲁棒性强的优点。 相似文献
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就1台GT13E2型燃气轮机发生的一起燃烧室及排气烟道爆炸事故进行了详细的分析,认为在控制油压力消失和燃烧室熄火的情况下,燃气轮机仍然不能发出跳机指令,进而在燃气轮机转速下降过程中发电机低频保护动作断开主变高压侧断路器,造成厂用电丢失,导致燃气轮机在燃油系统的事故水冲洗过程中发生爆炸。指出了爆炸的原因是由于制造厂燃气轮机控制系统逻辑及控制油管道设计错误,爆炸是设计错误发展的必然结果,以及事故处理和预防措施。 相似文献
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西气东输工程燃气轮机驱动压缩机组控制系统负荷控制功能不完善,造成机组在压力自动控制模式下,燃机、压缩机的转速和排气温度等重要参数在运行过程中极不稳定,并呈现周期性振动特性,对燃机重要部件造成严重的低周疲劳损伤。本文对机组的控制方式进行了研究,分析了机组功率、转速、排气温度波动的机理,通过合理调整控制器参数解决了机组关键参数波动的问题,显著改善了机组的运行稳定性和可靠性,对于提高机组的使用寿命、降低热部件的疲劳损耗具有主要作用。所做工作对机组控制系统的设计和调整具有参考价值。 相似文献
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This paper presents the work on the design and part-load operations of a hybrid power system composed of a pressurized molten carbonate fuel cell (MCFC) and a micro-gas turbine (MGT). The gas turbine is an existing one and the MCFC is assumed to be newly designed for the hybrid system. Firstly, the MCFC power and total system power are determined based on the existing micro-gas turbine according to the appropriate MCFC operating temperature. The characteristics of hybrid system on design point are shown. And then different control methods are applied to the hybrid system for the part-load operation. The effect of different control methods is analyzed and compared in order to find the optimal control strategy for the system. The results show that the performance of hybrid system during part-load operation varies significantly with different control methods. The system has the best efficiency when using variable rotational speed control for the part-load operation. At this time both the turbine inlet temperature and cell operating temperature are close to the design value, but the compressor would cross the surge line when the shaft speed is less than 70% of the design shaft speed. For the gas turbine it is difficult to obtain the original power due to the higher pressure loss between compressor and turbine. 相似文献
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The purpose of this study is to compare the part-load performance of a solid oxide fuel cell/gas turbine (SOFC/GT) hybrid system in three different control modes: fuel-only control, rotational speed control, and variable inlet guide vane (VIGV) control. While the first mode maintains a constant air supply and reduces the supplied fuel to achieve part-load operation, the other modes are distinguished by the simultaneous controls of the air and fuel supplied to the system. After the performance analysis of a SOFC/GT hybrid system under part-load operating conditions, it was concluded that the rotational speed control mode provided the best performance characteristics for part-load operations. In spite of worse performance than the rotational speed control mode, the VIGV control mode can be a good candidate for part-load operation in a large-scale hybrid system in which the rotational speed control is not applicable. It was also found that, in spite of a relatively small contribution to the total system power generation, the gas turbine plays an important role in part-load operation of a SOFC/GT hybrid system. 相似文献