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2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)最新文献

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The effective energy storage for hybrid power systems with renewable energy sources 可再生能源混合动力系统的有效储能
Pub Date : 2019-10-01 DOI: 10.1109/ICOECS46375.2019.8950012
S. Obukhov, I. Plotnikov, V. G. Masolov
One of principal components of hybrid power stations with renewable energy resources is the energy storage which characteristics define power and cost efficiency of all power generating system. In the article the analysis of operating modes of hybrid power station with the high level of substitution of organic fuel is made, the necessity of use of energy storage is proved. The original architecture of creation and a way of management of operating modes of a hybrid power generating system based on use of the double-circuit storage of energy providing the optimum modes of a charge of rechargeable batteries is offered. In a such way their safety and the maximum operation life is ensured.
可再生能源混合电站的主要组成部分之一是储能系统,其特性决定了整个发电系统的功率和成本效率。本文通过对有机燃料高替代率混合电站运行方式的分析,论证了采用储能的必要性。提出了一种基于双回路储能的混合发电系统的初始结构和运行模式的管理方法,该系统提供了可充电电池的最佳充电模式。这样就保证了它们的安全性和最大的使用寿命。
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引用次数: 1
Efficiency Analysis of Hybrid Electric Propulsion System for Commuter Airliners 通勤客机混合动力推进系统效率分析
Pub Date : 2019-10-01 DOI: 10.1109/ICOECS46375.2019.8949967
A. Varyukhin, P. Suntsov, M. Gordin, V. Zakharchenko, D. Rakhmankulov
The paper presents the study of conceptual design of hybrid propulsion system for 9–19 passenger capacity commuter airliner. As a prototype a twin-engine turboprop aircraft is considered. The engines for such aircrafts must have the power to ensure a short take off, but at cruise speed the engine power is excessive which leads to increased fuel consumption. The hybrid propulsion system considered in the paper consists of two propellers directly driven by two electric motors with maximum power of 550 kW each. The electric power is provided by a power unit that includes batteries and one or two turboshaft engine rotating generators. At take-off the electric motors are supplied by batteries and generators simultaneously. Gas-turbine generators should provide enough power for cruise flight and batteries charging at minimal fuel consumption. The power of each generator at the ground for two-generator case should be 550 hp each, and for one-generator case should be 1100 hp. The numerical model uses predictions for year 2020, 2025 and 2030 of the characteristics for gas turbine, electric generator, electric motor, the control system, and batteries. The modelling of typical airplane flight cycle with hybrid propulsion system characteristics predicted for 2025-2030 time period shows 1–3% increase in fuel efficiency for two-generator case. For the same period, the one-generator case hybrid propulsion system will have less weight and 9–10% fuel consumption decrease. All of these lead to 16% airplane range increase in comparison with the traditional propulsion system.
本文研究了9-19载客量通勤客机混合动力推进系统的概念设计。作为一个原型,双引擎涡轮螺旋桨飞机被考虑。这种飞机的发动机必须有足够的动力来保证短时间起飞,但在巡航速度下,发动机功率过大,导致燃料消耗增加。本文研究的混合动力推进系统由两个螺旋桨组成,由两台最大功率为550千瓦的电动机直接驱动。电力由一个动力单元提供,该动力单元包括电池和一个或两个涡轴发动机旋转发电机。起飞时电动机由电池和发电机同时供电。燃气涡轮发电机应该为巡航飞行和电池充电提供足够的动力,以最小的燃料消耗。双机情况下,每台发电机的接地功率为550马力,单机情况下,每台发电机的接地功率为1100马力。该数值模型使用了对2020年、2025年和2030年燃气轮机、发电机、电动机、控制系统和电池特性的预测。对2025-2030年混合动力推进系统的典型飞机飞行周期建模表明,双发电机情况下燃油效率提高1-3%。在同一时期,单发电机箱混合推进系统的重量更轻,燃油消耗降低9-10%。与传统推进系统相比,所有这些都使飞机航程增加了16%。
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引用次数: 2
Method of Detecting of Emergency Cascade Processes in Electric Power Systems 电力系统中应急级联过程的检测方法
Pub Date : 2019-10-01 DOI: 10.1109/ICOECS46375.2019.8949971
Ildar Shakhmaev, Bulat Gaysin, N. Novikov
Due to the occurrence of cascade accidents in electric power systems (EPS) actual is the task of creating a tool aimed at their prevention. The influence of EPS heterogeneity on the emergence and development of a cascade process based on experimental data is shown. A technique is proposed for identifying, recognizing the threat of a possible occurrence of emergency cascade processes in heterogeneous EPS. The definition of heterogeneity for electric power systems is given. The occurrence and development of a real accident that occurred in the EPS of the Republic of Bashkortostan is investigated, the possibility of its detection is shown. A technique is proposed for visual presentation of a heterogeneous surface of factors affecting emergency cascade processes in an EPS. The developed method allows to determine the possibility of the emergence and development of an emergency cascade process in the formation and maintenance of the regime, as well as in the design of the development of a EPS to make effective management decisions to increase survivability.
由于电力系统串级事故的发生,实际的任务是创建一个工具,旨在防止其发生。基于实验数据,揭示了EPS非均质性对叶栅过程产生和发展的影响。提出了一种识别和识别异质EPS中可能发生的紧急级联过程威胁的技术。给出了电力系统非均质性的定义。对巴什科尔托斯坦共和国EPS发生的真实事故的发生和发展进行了调查,显示了其检测的可能性。提出了一种可视化表示EPS中影响应急级联过程因素的非均匀表面的技术。所开发的方法可以确定应急级联过程在制度形成和维持过程中出现和发展的可能性,以及在EPS的设计开发中做出有效的管理决策以提高生存能力。
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引用次数: 2
Modification of the WaldBoost algorithm to improve the efficiency of solving problems of technical diagnostics of electrical systems 改进WaldBoost算法,提高电力系统技术诊断问题的求解效率
Pub Date : 2019-10-01 DOI: 10.1109/ICOECS46375.2019.8950002
A. Chesalin, S. Grodzenskiy
In this paper we study the modifications of the adaptive boosting algorithm to solve a wide class of technical diagnostic problems of electrical systems. The implementation of the WaldBoost algorithm is considered, and its modification is proposed, which allows to significantly reduce the number of weak classifiers to achieve a given classification accuracy. The efficiency of the proposed algorithm is shown by specific examples.
本文研究了对自适应增强算法的改进,以解决电气系统中广泛的技术诊断问题。考虑了WaldBoost算法的实现,并对其进行了改进,使弱分类器的数量显著减少,从而达到给定的分类精度。具体算例表明了该算法的有效性。
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引用次数: 0
Synchronous Frequency Calculation Based on Synchrophasor Measurements 基于同步相量测量的同步频率计算
Pub Date : 2019-10-01 DOI: 10.1109/ICOECS46375.2019.8949985
P. Kovalenko, M. Senyuk, V. Mukhin, A. A. Korelina
Voltage frequency is a key parameter both in the studies of the power system properties and in its operational management. Many methods have been proposed for determining the frequency, but most of them are highly sensitive to transients and noise, and also have insufficient time resolution. Thus, it is necessary to develop an algorithm for determining the frequency with the minimum error regardless of the transients and noise presence, and in order to study the electromechanical transients in more detail, it is necessary to perform measurements “inside” the industrial frequency period. The methods of digital signal processing were used: sliding parabolas, sliding segments, data approximation by the least squares method. All calculations were made using MATLAB. An algorithm was developed for determining the synchronous frequency based on the synchrophasor data using characteristic points: phase intersections with zero, phase extrema and phase intersections. The computational delay of the developed algorithm is 1.66 ms, which allows its use in real-time calculations. It was determined that during transient the extremum bias significantly affects the accuracy of frequency determination. The algorithm that considers the intersection of phases with zero and the intersection of phases has a higher computational stability and a smaller deviation of the calculated frequency from the given one.
电压频率是电力系统特性研究和运行管理中的一个关键参数。人们提出了许多确定频率的方法,但大多数方法对瞬态和噪声非常敏感,而且时间分辨率不足。因此,有必要开发一种算法,在不考虑瞬态和噪声存在的情况下,以最小误差确定频率,并且为了更详细地研究机电瞬态,有必要在工业频率周期内进行测量。采用数字信号处理方法:滑动抛物线、滑动分段、最小二乘法逼近。所有计算均使用MATLAB进行。提出了一种基于同步相量数据的同步频率确定算法,该算法利用相位零点相交、相位极值和相位相交的特征点来确定同步频率。该算法的计算延迟为1.66 ms,可用于实时计算。结果表明,在瞬态过程中,极值偏置显著影响频率测定的精度。该算法考虑了相位与零的相交和相位的相交,具有较高的计算稳定性和较小的计算频率与给定频率的偏差。
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引用次数: 0
Diagnosis of Composite Materials In Electrical Machines 电机中复合材料的诊断
Pub Date : 2019-10-01 DOI: 10.1109/ICOECS46375.2019.8949887
I. Sayakhov, D. Shemelin
The most loaded parts of electrical machines are the shaft, the rotor sleeve, the stator teeth, and the bearings. This means using composite materials in these parts requires diagnostic systems to determine the residual life and to prevent emergencies. This paper presents methods for non-destructive testing of products made of composite materials. It describes the known methods for controlling the conditions of electrical machine parts made of composite materials. The paper also presents the developed method for eddy-current control of rotor sleeves made of carbon fiber.
电机中负荷最大的部件是轴、转子套筒、定子齿和轴承。这意味着在这些部件中使用复合材料需要诊断系统来确定剩余寿命并防止紧急情况的发生。本文介绍了复合材料制品的无损检测方法。它描述了控制由复合材料制成的电机部件的条件的已知方法。本文还介绍了碳纤维转子套涡流控制方法的研制。
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引用次数: 0
Calculation of two-phase short circuit current in electrical network when it is powered from the transformer with connection of windings according to the scheme $mathrm{Y}/Delta-11$ 根据方案$ mathm {Y}/Delta-11$计算绕组连接变压器供电时电网两相短路电流
Pub Date : 2019-10-01 DOI: 10.1109/ICOECS46375.2019.8949883
A. Serebryakov, V. Osokin
Since when connecting the transformer windings according to the scheme $mathbf{Y}/boldsymbol{Delta}-11$, the currents of direct and reverse sequences are equally transformed from one winding to another and the short-circuit resistance in the equivalent circuit for these currents and their sums are the same, if we neglect the magnetizing currents, the primary and secondary currents in each phase of the reduced transformer will be equal. This means that the currents and MDS of the primary and secondary windings are balanced in each phase separately and the influence of one phase on the other is absent. This gives the opportunity to calculate the currents of SC without conversion of the triangle into a star. In this case, the calculation is simplified and becomes more obvious. When determining the short-circuit resistance to the phase of the transformer with the connection of the windings Y/D, it is logically more reasonable and more clearly from a physical point of view to use a formula that includes not linear but phase voltages.
由于按方案$mathbf{Y}/boldsymbol{Delta}-11$连接变压器绕组时,正序和反序电流从一个绕组相等地变换到另一个绕组,等效电路中这些电流的短路电阻及其总和相等,如果忽略磁化电流,则简化后的变压器各相的一次电流和二次电流相等。这意味着初级和次级绕组的电流和MDS在每个相中分别平衡,并且不存在一个相对另一个相的影响。这提供了计算SC电流的机会,而无需将三角形转换为星形。在这种情况下,计算简化,变得更加明显。在确定绕组Y/D连接的变压器相位的短路电阻时,使用不包括线性电压而包括相电压的公式,从物理角度来看,在逻辑上更合理,也更清楚。
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引用次数: 1
Numerical study of the impact of different cooling arrangements on a high length/diameter ratio motor for electric commercial vehicle 不同冷却布置对电动商用车高长径比电机影响的数值研究
Pub Date : 2019-10-01 DOI: 10.1109/ICOECS46375.2019.8949929
S. La Rocca, A. McQueen, K. Paciura, A. La Rocca, A. Walker, G. Vakil, D. Gerada, M. Al-Ani, T. Zou, R. Ramanathan, C. Gerada
Computational Fluid Dynamics (CFD) was used to carry out a fluid flow and thermal investigation of a high power dense traction machine for electric commercial vehicle. One of the features of the machine design considered is the high Length/Diameter (L/D) ratio; this can represent a further challenge when performing the thermal design; indeed the heat dissipation from the stator core can represent an issue. The aim of this work is to identify an effective cooling configuration capable of enhancing the cooling of the stator and maintaining the operating temperature of the whole machine within the allowable limits. In this paper CFD analyses were therefore used to assess the thermal capability of several cooling arrangements; numerical results of each case are presented and compared. In particular an alternative cooling option, consisting in the implementation of heat pipes between the machine's stator teeth, was considered. Due to their simple structure and high heat transfer coefficients, heat pipes are not invasive but at the same time can dissipate large amount of heat. CFD results show how a significant temperature drop of the machine's core can be achieved.
采用计算流体力学(CFD)方法对某型大功率密集电动商用车牵引机进行了流体流动和热分析。机器设计考虑的特点之一是高长度/直径(L/D)比;在进行热设计时,这可能是一个进一步的挑战;事实上,定子铁心的散热可能是一个问题。这项工作的目的是确定一种有效的冷却配置,能够加强定子的冷却,并保持整个机器的工作温度在允许的范围内。因此,本文使用CFD分析来评估几种冷却布置的热性能;给出了每种情况下的数值计算结果并进行了比较。特别是另一种冷却选择,包括在机器的定子齿之间的热管的实施,被考虑。热管结构简单,换热系数高,不具有侵入性,但同时又能散失大量热量。CFD结果显示了如何实现机器核心的显著温度下降。
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引用次数: 2
Using parameters of the external magnetic field for diagnosing faults in automotive alternator 利用外磁场参数诊断汽车交流发电机故障
Pub Date : 2019-10-01 DOI: 10.1109/ICOECS46375.2019.8950022
Andrey Puzakov
The rationale of the problem being investigated is driven by the lack of informativeness and significant complexity of the existing methods of diagnosis of automotive alternators. The method leading to the investigation of this problem is evaluation of external magnetic field parameters, which gives an opportunity to detect electrical faults of an automotive alternator. It was established that the magnitude of the external magnetic field measured by the Hall sensor is sensitive to the technical condition of the generator. By analyzing the distribution of the axial component of the external magnetic field, the optimal point on the surface of the generator is selected, which ensures the uniqueness of the diagnostic parameter. An algorithm for recognizing electrical faults based on the magnitude of an external magnetic field is developed. Information in this paper may be used for further development and implementation of the proposed method of diagnosis of automotive alternators.
研究问题的基本原理是由于现有的汽车交流发电机诊断方法缺乏信息性和显著的复杂性。研究这一问题的方法是评估外磁场参数,这为检测汽车交流发电机的电气故障提供了机会。建立了霍尔传感器测量的外磁场大小对发电机的技术条件敏感。通过分析外磁场轴向分量的分布,选择发电机表面的最优点,保证了诊断参数的唯一性。提出了一种基于外加磁场大小的电气故障识别算法。本文的信息可用于进一步开发和实施所提出的汽车交流发电机诊断方法。
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引用次数: 4
Modeling of the barrier discharge in the exhaust gases of automobile 汽车废气中阻隔性排放的建模
Pub Date : 2019-10-01 DOI: 10.1109/ICOECS46375.2019.8949981
Maksudov Denis Vilevich, Okhotnikov Mikhail Valerievich
In the paper we propose an original design of the ozone-catalytic device, in which the process of ozone formation occurs directly inside the catalytic block of the honeycomb structure, that allows to solve the problem of exhaust gases purification at the cold start of an automobile engine. For the ozonator design under consideration, mathematical modeling of the barrier discharge process in a gaseous environment with a multicomponent composition, close to the composition of automobile exhaust gases, was performed, that allows investigating the dependence of the barrier discharge efficiency on the temperature of the environment and on the concentration of certain chemical substances.
本文提出了一种新颖的臭氧催化装置设计,将臭氧的形成过程直接发生在蜂窝结构的催化块内部,从而解决了汽车发动机冷启动时的废气净化问题。对于正在考虑的臭氧发生器设计,对具有多组分组成的气体环境中的屏障排放过程进行了数学建模,接近于汽车尾气的组成,从而可以研究屏障排放效率对环境温度和某些化学物质浓度的依赖。
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引用次数: 2
期刊
2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)
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