共查询到19条相似文献,搜索用时 857 毫秒
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船舶电站柴油机非线性H∞调速器 总被引:6,自引:0,他引:6
船舶电力系统频率的稳定性主要取决于船舶电站柴油机调速系统的转速响应特性.船舶电站柴油机调速系统是一个非线性控制系统,为了分析系统的动态特性,首先建立柴油机调速系统的非线性数学模型,然后以此为基础设计非线性H∞调速器.将直接反馈线性化和H∞控制理论相结合应用于柴油机调速器的设计,把系统的性能要求转化为标准H∞控制问题,通过解Riccati方程,获得了柴油机非线性H∞转速控制律.计算机仿真结果表明,设计的非线性H∞调速器能在充分考虑系统模型不确定性的情况下,有效地提高系统的动态精度和抑制扰动的能力,改善了船舶电力系统频率的稳定性. 相似文献
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本文系统介绍了PD-1型电子调速器的原理性能,并根据实际应用情况对电子调速器在柴油发电机组上如何进行调整、正确与柴油机油泵连接等问题进行了阐述。 相似文献
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船舶电站柴油机H∞调速器的仿真研究 总被引:2,自引:0,他引:2
为了提高柴油机调速系统的动态精确度,抑制负荷的扰动,将H∞控制理论应用于柴油机调速系统的设计,将系统的性能要求转化为标准H∞控制问题。计算机仿真实验结果表明,所设计的H∞调速器能在考虑系统模型不确定性的情况下,有效地提高了系统的动态精确度和抑制扰动的能力,改善了船舶电力系统频率的稳定性。 相似文献
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从外雄水电站调速器的原理出发,阐述了其调速器的型号、机械液压系统的组成及工作原理、调速器主要机械部件及功能、硬件结构、软件功能等。分析了调速器的控制规律、特点及功能,为今后水电站调速系统的检修、升级奠定了理论基础。 相似文献
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汽油发电机转速变化的动态性能是影响发电机性能指标的一个重要因素,在分析小型汽油发电机数学模型和控制任务的基础上,提出了模糊滑模控制算法,设计了滑模控制器,利用MATLAB工具进行了仿真,并进行了配机实验,把机械调速和电子调速的输出电能品质和节能情况进行了比较。实验结果表明:使用模糊滑模控制器的系统稳定性、动态性能都有了较大提高,且电子调速器较机械调速器具有更好的节能效果。 相似文献
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介绍了自行研制的旋转配压阀,并以此作为主配压阀,组成了一个步进式水轮机调速器液压随动系统。采用电气、液压控制实现系统各种功能。实验结果表明:该系统简化了调速器机械液压结构,提高了系统性能,能够满足电站综合自动化的要求。 相似文献
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20世纪90年代初开发的步进电机或直流伺服电机控制的水轮机调速器存在大负荷下响应速度慢、高速运转时转矩下降或有磨擦并产生火花等问题,因此,有必要研制交流伺服控制型可编程水轮机调速器介绍了交流伺服控制型可编程水轮机调速器电气部分、电气一机械转换部件和液压系统的结构和工作原理,详细分析了各部分的设计特点和性能、交流伺服控制型可编程水轮机调速器的主要性能指标达到或优于国家标准值,在水电厂的运行情况也表明,该调速器性能良好。 相似文献
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Justification of using renewable energy sources and a brief analysis of their application prospects is given. The most common renewable energy sources for mobile thermal power plants are presented. The possibilities and ways of using ethanol as an energy source for such plants with diesel engines are analyzed. It is shown that it is feasible to add small amounts of ethanol to oil diesel fuel (DF) for obtaining an environmentally sustainable energy source for diesel engines. Therewith, a stable mixture of components can be obtained by adding anhydrous (absolute) ethanol to the oil fuel. The authors studied a mixture containing 4% (by volume) of absolute ethanol and 96% of oil DF. The physicochemical properties of the mixture and each of its components are presented. Diesel engine of the type D-245.12S has been experimentally studied using the mixture of DF and ethanol. The possibility of reducing the toxicity level of the exhaust emissions when using this mixture as an energy source for diesel engines of mobile power plants is shown. Transition of the studied diesel engine from oil DF to its mixture with ethanol made it possible to reduce the smoke capacity of the exhaust gases by 15–25% and to decrease the specific mass emissions of nitrogen oxides by 17.4%. In this case, we observed a slight increase in the exhaust gas emissions of carbon monoxide and light unburned hydrocarbons, which, however, can easily be eliminated by providing the exhaust system of a diesel engine with a catalytic converter. It is noted that the studied mixture composition should be optimized. The conclusion is made that absolute ethanol is a promising ecofriendly additive to oil diesel fuel and should be used in domestic diesel engines. 相似文献
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结合某超高层柴油发电机组电气系统的设计经验,对超高层建筑常用柴油发电机组系统主接线形式、优缺点进行分析、比较,并提出了合理的建议。对柴油发电机组附属设备电气控制方式、柴油发电机的储油量以及接地系统进行探讨,给出了常规做法,具有借鉴意义。 相似文献
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B. Boulkroune A. Aitouche V. Cocquempot 《International Journal of Adaptive Control and Signal Processing》2015,29(2):143-157
This paper deals with the problem of designing a nonlinear observer for diesel engines. The goal is to estimate the masses entering the cylinders and the inlet and exhaust pressures. To achieve this, the considered model subject to disturbances contains linear parameter‐varying part and nonlinear part having a large Lipschitz constant. The H ∞ criterion is used to reject the disturbances. Besides, the modified mean value theorem is applied to express the nonlinear error dynamics as a convex combination of known matrices with time‐varying coefficients. The sufficient conditions are derived and given in terms of linear matrix inequality. The advantage of the proposed method is that it can be applied to a wider class of nonlinear systems, particulary our case: diesel engines. The proposed approach is tested and evaluated using an advanced diesel engine professional simulator AMEsim (LMS International, Leuven, Belgium). Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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A. A. Salamov 《Thermal Engineering》2007,54(2):166-168
Large-capacity thermal power stations and customer’s cogeneration stations equipped with diesel and gas engines, and their technical-economic and cost indicators are considered. 相似文献
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对LNG电厂在广东佛山地区选点时宜考虑的因素——离负荷中心的距离、离管线的距离、当地电网中电源的情况、冷却水供应、电厂出线条件的情况进行了详细的分析,而且重点研究和分析该地区电源结构中柴油机、小型燃气轮机的比例,尽量使所建电厂在接入当地电网时,具备较强的电价竞争力。最后强调在该地区进行LNG电厂选点时可以优先考虑老厂扩建模式的观点。 相似文献
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Features of the application of asynchronous three-phase engines with a short-circuit rotor for traction electric drives are discussed. Possible variants of control systems are analyzed at the structural-logic level. Recommendations of their implementation in traction electric drives of an electric-rolling stock and diesel locomotives are proven. 相似文献
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针对内蒙古的特定情况,采用以风力发电为主导的小型孤立发电系统提供电能,可保证供电可靠性、节省柴油燃料和保护当地的生态环境。本文所述的小型孤立发电系统以风/柴/储能联合发电的形式提供电能。文章采用序贯Monte-Carlo模拟法实现风/柴/储能发电系统的可靠性评估。根据风电场的风速历史数据,建立风电场的风速时间序列模型。由风速时间序列计算风力发电机的输出功率。在考虑机组随机故障的情况下,由发电机和负荷模型得到蓄电池的时间序列模型。针对样例系统,量化评估了仿真样本容量、蓄电池容量、蓄电池充放电率和风力发电机额定功率等,一些因素对风/柴/储能发电系统可靠性的影响。仿真结果可为风/柴/储能发电系统可靠运行提供依据,为政府及电力部门推广风/柴/储能联合发电向偏远地区供电提供依据。 相似文献