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2018 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon)最新文献

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Method of Setting Reliability Requirements for a Power Supply System 供电系统可靠性要求的设置方法
A. Voronin, N.E. Peshekhonov, V. Rybakov
The article describes a method of setting the requirements for reliability of a power supply system, which could be applied in the context of limited source data. This work considers questions of reliability apportionment between systems of a facility with the view to set the requirements for reliability of a power supply system. The study evaluates possibility of application of source data based on a priori reliability indexes of comparables in order to apportion the requirements. The study describes main stages of significance estimation of the systems of a facility using functional topological method that was adjusted by the authors to be applied to any complex system consisting of nonhomogeneous components. The article presents mathematical models of reliability apportionment that define requirements depending on level of significance of facility systems with regard to the probability function of reliability of the facility.
本文介绍了一种确定供电系统可靠性要求的方法,该方法适用于源数据有限的情况。这项工作考虑了设施系统之间的可靠性分配问题,以确定供电系统的可靠性要求。本研究基于可比数据的先验可靠性指标来评估源数据应用的可能性,从而对需求进行分配。该研究描述了使用功能拓扑方法的设施系统的显著性估计的主要阶段,该方法被作者调整为适用于由非同质组件组成的任何复杂系统。本文提出了可靠性分配的数学模型,该模型根据设施可靠性的概率函数,根据设施系统的重要程度来定义要求。
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引用次数: 2
Technological and Economic Evaluation of the System of Heat Supply with the Usage of Renewable Sources of Energy 可再生能源供热系统的技术经济评价
S. Sheryazov, O. Ptashkina-Girina, N.S. Nizamutdinova
Further development of power engineering may be with the usage of renewable sources of energy. For this purpose a number of stimulating measures on active usage of renewable energy are worked out and functioned. The development of renewable power engineering is on the way of production of electric power with the great power facilities. In heat power the renewable energy is little used on different reasons, in particular because of the development of decentralized system of heat supply, the part of which is 57% in Russia. It makes definite difficulties in search of interested investors. The results of research on defining the economic indices of the system of heat supply on the example of the usage of low potential heat of the groundwater with the help of heat pump installation are shown in the article. Existing methods of economic evaluation of projects using renewable sources are given. On levelized cost of heat energy the effectiveness of using heat pump installation in the conditions of South Ural in 50% providing with consumer heat energy is proved, remaining part is provided with the burning of traditionally used energy resource.
电力工程的进一步发展可能与可再生能源的使用有关。为此目的,制定并实施了若干鼓励积极利用可再生能源的措施。可再生能源工程的发展是在电力生产的道路上与巨大的电力设施。由于各种原因,可再生能源在火力发电中很少使用,特别是由于分散式供热系统的发展,俄罗斯的分散式供热系统占57%。这无疑使寻找感兴趣的投资者变得困难。本文以热泵装置利用地下水低潜热为例,对供热系统经济指标的确定进行了研究。介绍了现有的可再生能源项目经济评价方法。在热能均一化成本的基础上,证明了南乌拉尔地区使用热泵装置的有效性,其中50%提供消费者热能,其余部分提供传统能源的燃烧。
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引用次数: 6
Decrease in Risk of Incident in Work Automatic Control System of the Gas-Pumping Unit 降低抽气机自动控制系统工作中的事故风险
D. Denisov, T. A. Bakiyev
Is investigated statistics of refusals of the rotors speed measurement unit of a gas turbine unit (GTU). The major factors leading to critical decrease in reliability of measurement are found. Mathematical dependences for assessment of noise immunity of rotors speed measurement system are found. Criteria of increase in noise immunity of system of measurement are revealed. Effective methods of increase in reliability of measurement are found. The method of calculation of parameters of components of the low pass filter for measurement process optimization is offered. The comparative research of two methods of measurement of rotors speed is conducted: a method with use of the induction sensor and a method with use of the sensor on the basis of Hall's effect. Advantages of the second method of measurement are revealed.
对某型燃气轮机机组转子测速单元的拒绝统计进行了研究。找出了导致测量可靠性临界下降的主要因素。建立了转子测速系统抗扰度评估的数学依赖关系。给出了提高测量系统抗扰度的判据。找到了提高测量可靠性的有效方法。提出了用于测量过程优化的低通滤波器各元件参数的计算方法。对两种测量转子转速的方法进行了比较研究:一种是使用感应传感器的方法,另一种是使用霍尔效应传感器的方法。揭示了第二种测量方法的优点。
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引用次数: 0
Numerical Investigation of Thermohydraulic Processes in the Cooling Channels of the Nozzle Vane of a High-Temperature Gas Turbine 高温燃气轮机喷嘴叶片冷却通道内热液过程的数值研究
I. Shevchenko, A. Rogalev, S. Osipov
This study describes investigation of a cooled vane trailing edge part devoted to the temperature distribution smoothening without the film cooling addition. The investigation subject is a slot channel with a perforated deflector. The cooling air is supplied through corridor located orifices and its wall cooled with streams. The side flow influence may be mitigated by shading ribs installed upstream the last three rows of the air supply orifices. The computer simulation with ANSYS CFX code at fixed pressure drops at the channel inlet and exit shows a 40–45% heat flux increase combined with the 24% cooling air massflow reduction. The intensive flow turbulence after the ribs reduces the area with low heat transfer efficiency. The turbine operation analysis shows that the ribs may improve the cooling efficiency for 25–30%.
本文研究了一种不加气膜冷却的叶片后缘冷却部分的温度分布平滑问题。所述研究对象是具有穿孔偏转器的槽通道。冷却空气通过位于孔口的走廊供应,其壁面用流冷却。侧流的影响可以通过在送风孔的最后三排上游安装遮阳肋来减轻。采用ANSYS CFX程序对通道进出口定压降条件下的热流密度增加40-45%,冷却空气质量流量减少24%。肋板后强烈的流动湍流减小了换热效率较低的面积。涡轮运行分析表明,肋板可使冷却效率提高25-30%。
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引用次数: 1
Nonlinear-Periodic Control System for Non-Affine Stationary Plant with Statement Delay 具有语句延迟的非仿射固定对象的非线性周期控制系统
E. L. Eremin, E. A. Shelenok
The article deals with the problem of synthesis of nonlinear regulator of control system for non-affine stationary plant with known constant statement delay. The plant is functions in periodic modes in the presence of constantly acting external perturbations and parametric uncertainty. As solution methods the hyperstability criterion, the fast-acting dynamic corrector, and $boldsymbol{L}$-dissipativity conditions are used. The key stage of the synthesis is the receipt for V. M. Popov's inequality special integral estimates that are ensure the fulfillment of the control goal. In final part of the article with the help of simulation the dynamic processes taking place in the proposed management system, which indicate its high quality are being visually illustrated.
研究了具有已知常数语句延迟的非仿射固定对象控制系统的非线性调节器的综合问题。在不断作用的外部扰动和参数不确定性的存在下,该装置以周期模式运行。求解方法采用了超稳定判据、快速动态校正器和耗散条件。综合的关键阶段是得到V. M. Popov不等式的特殊积分估计,以保证控制目标的实现。在文章的最后部分,通过仿真对所提出的管理系统中发生的动态过程进行了直观的说明,表明其高质量。
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引用次数: 1
Approaches to Information Measurement of the Structure State of Technical Systems 技术系统结构状态的信息度量方法
Dulesov Aleksander Sergeevich, Eremeeva Olga Sergeevna, Karandeev Denis Jurevich, Dulesova Natalia Valerievna
Opportunities of application of the approaches of known scientists to the information measurement are analyzed. The structure of a technical system is proposed as the object of measurement. This structure is characterized by the amount of system elements, possible number and probabilities of its states. Classical mathematical expressions of information theory are presented and the possibilities of their application for determining the information amount and information entropy are established. The issues of accumulation, removal of uncertainty and regulations of the variety of information with reference to considering structures of system are touched.
分析了在信息测量中应用知名科学家方法的机会。提出了一个技术系统的结构作为测量对象。这种结构的特征是系统元素的数量、可能的数量和状态的概率。给出了信息论的经典数学表达式,并建立了它们在确定信息量和信息熵方面的应用可能性。在考虑系统结构的前提下,探讨了信息多样性的积累、消除不确定性和规律性等问题。
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引用次数: 6
The Electromagnetic Juice Press Control System 电磁榨汁机控制系统
V. A. Kargin, A. V. Volgin, A. Moiseev
A promising direction in the development of fruit juice processing machines is the use of a pulsed power electric drive, which is based on a stepped linear electromagnetic engine. One of the main output indicators of the electromagnetic press for squeezing juice is the pulling force of the stepping linear electromagnetic engine, which does not remain unchanged as the rod moves with the piston and the compression of the pulp. In practice, typically, the amount of the supply voltage is selected so as to provide an upper limit of the range of tractive effort to ensure the completion of the juice extraction process. However, the excess of electrical and mechanical energy at the initial stage of the process leads to overheating of the winding, reduces the mechanical life of the moving parts of the stepping linear electromagnetic engine. In this paper, we propose the approach to the realization of automatic correction of the output traction of a stepping linear electromagnetic engine in the electromechanical discrete system in the process of compression of pulp to obtain juice.
在步进式直线电磁发动机的基础上,采用脉冲电力驱动是果汁加工机发展的一个有前途的方向。电磁榨汁机的主要输出指标之一是步进式直线电磁发动机的拉力,该拉力随着杆杆随活塞运动和对纸浆的压缩而不保持不变。在实践中,通常,选择电源电压的量,以便提供牵引力范围的上限,以确保完成果汁提取过程。然而,在过程的初始阶段,电能和机械能的过剩导致绕组过热,降低了步进直线电磁发动机运动部件的机械寿命。本文提出了一种在机电离散系统中实现步进线性电磁发动机在压榨纸浆获得果汁过程中输出牵引力自动校正的方法。
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引用次数: 1
Experimental Study of a Combined Supersonic Separator 组合式超音速分离器的实验研究
V. Vlasenko, V. V. Slesarenko, K.I. Bashirov
In this paper the authors investigated the patented design of a combined supersonic separator (CSS). CSS is a counter flow three-flow vortex tube with an energy separation chamber in the form of a Laval nozzle that can be used to prepare hydrocarbon gas for transport as well as to prepare hydrocarbon gas for using as fuel in power units on oil and gas fields. Experimental data obtained during operation of a combined supersonic separator in dry and moist air are shown. Dependence of temperature efficiency of a CSS on of cold flow ratio is given. Data on the separation efficiency of a CSS in comparison with a three-flow vortex (TVT) tube are obtained.
本文研究了组合式超音速分离器(CSS)的专利设计。CSS是一种带有拉瓦尔喷嘴形式的能量分离室的逆流三流涡流管,可用于制备烃类气体供运输,也可用于制备烃类气体供油气田动力装置用作燃料。给出了组合式超音速分离器在干湿空气中运行的实验数据。给出了冷流比对CSS温度效率的影响。并与三流涡管(TVT)的分离效率进行了比较。
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引用次数: 0
Stability of Synchronous Motors Under Single Phase Grid Short Circuits 单相电网短路条件下同步电动机的稳定性
A. Fedotov, R. Mudarisov
This paper studies asymmetrical voltage sags caused by single phase short circuits appearing in power grids. Research defines the worst case fault conditions and shows their impact on stability of high voltage synchronous motors. Calculations done within the research take into account the distribution of voltage and current symmetrical components in power-supply system elements. Power supply system model was developed in the Matlab program in order to study stability of synchronous motors during voltage sags. The motor in the model is equipped with static exciter that enables us to account the impact of sag on motors excitation winding. The paper also shows fault appearance time (initial point on wave influence) as one of the worst case fault conditions. Finally research proposes the methodology developed to assess synchronous motor stability (calculation of the fault critical duration) under discovered worst case fault conditions. Results of the research could be used to calibrate protective relays used in power supply grids of oil and gas transportation systems equipped with powerful synchronous motors.
本文研究了电网中单相短路引起的不对称电压跌落问题。研究了高压同步电机最坏故障条件的定义,并分析了其对电机稳定性的影响。研究中所做的计算考虑了供电系统元件中电压和电流对称分量的分布。为了研究同步电动机在电压跌落时的稳定性,在Matlab程序中建立了电源系统模型。模型中的电机配有静态励磁器,使我们能够考虑凹陷对电机励磁绕组的影响。故障出现时间(波影响起始点)是最坏的故障条件之一。最后,研究提出了在发现的最坏故障条件下评估同步电机稳定性的方法(计算故障临界持续时间)。研究结果可用于校准配备大功率同步电机的油气输送系统供电电网中使用的保护继电器。
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引用次数: 1
An Approach of the Wavelet-Fuzzy Controller of Vector Control System by the Induction Motor 感应电机矢量控制系统的小波模糊控制方法
A. Koldaev, A. A. Evdokimov, D. Samoylenko, Y. N. Kocherov
The paper presents a wavelet-fuzzy controller of a field-oriented control system of belt conveyor drive. A discrete wavelet transform is used to decompose the speed error signal into various frequency components. The transformed error coefficients and scaling coefficients are used to generate the motor control signal The proposed controller is satisfied the speed control problem for a closed control system. The field-oriented control scheme with a wavelet-fuzzy controller under various dynamic operating conditions was investigated. The results of the comparison of the work of the traditional PI controller and the proposed wavelet-fuzzy controller are presented. The simulation results demonstrate the effectiveness of the proposed wavelet-fuzzy controller. Application of the proposed approach of the wavelet-fuzzy controller allows reducing of electromagnetic moment vibrations.
提出了一种带式输送机磁场定向控制系统的小波模糊控制器。采用离散小波变换将速度误差信号分解为不同的频率分量。利用变换后的误差系数和标度系数生成电机控制信号,该控制器可以满足封闭控制系统的速度控制问题。研究了在各种动态工况下,采用小波模糊控制器的磁场定向控制方案。对传统PI控制器和所提出的小波模糊控制器的工作进行了比较。仿真结果验证了所提小波模糊控制器的有效性。所提出的小波模糊控制方法的应用可以减少电磁矩振动。
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引用次数: 4
期刊
2018 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon)
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