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2020 IEEE Vehicle Power and Propulsion Conference (VPPC)最新文献

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Optimization of Railway Operating in terms of Distribution System Voltage Drop 基于配电系统电压降的铁路运行优化
Pub Date : 2020-11-01 DOI: 10.1109/VPPC49601.2020.9330847
M. Botte, L. D’Acierno, F. Mottola, M. Pagano
Today, electrified railway systems are involved in renewal processes, which address vehicles, wayside infrastructure and management of fleet of rolling stocks. Railway System Operators (RSOs) test how novel and innovative strategies impact of their own systems in order to reach energy efficiency targets. Due to the intrinsic interaction between the railway traction system and its primary grid, the feasibility of each innovative strategy has to be evaluated in terms of energy and power not only on the railway traction system, but also on its feeding grid. In the actual context forced by the constraint of Covit-19 virus, one of the more relevant strategies applied to urban railway systems is to operate the railway traction system with reduced values of headway. This strategy, which forces repetitive starts, in some cases contemporaneous, of rolling stocks, can produce severe voltage drops on the primary distribution grid. This paper proposes of examining the motion of a fleet of metro trains on a traction system fed by a MV distribution grid of reduced short circuit value. The numerical results point out how constraints imposed by the distribution grid at the Traction Power Substations can influence the control of moving the fleet of rolling stocks on the track.
今天,电气化铁路系统涉及到车辆、路旁基础设施和车队管理的更新过程。铁路系统运营商(rso)测试新颖和创新的战略如何影响他们自己的系统,以达到能源效率目标。由于铁路牵引系统与其主电网之间的内在相互作用,每一种创新策略的可行性不仅要从铁路牵引系统的能量和功率方面进行评估,还要从其馈电电网的能量和功率方面进行评估。在受covid -19病毒约束的实际背景下,采用降低车头时距的方式运营铁路牵引系统是城市铁路系统中更为合适的策略之一。这种策略迫使车辆重复启动,在某些情况下是同时启动,这可能会在主配电网上产生严重的电压下降。本文提出用降低短路值的中压配电网供电的牵引系统来研究地铁列车的运动。数值计算结果指出了牵引变电所配电网的约束如何影响轨道上车辆的运行控制。
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引用次数: 0
Thermal Design of a 2-Phase Flow Cooled Medium-frequency 140kVA Transformer for Railway Applications 铁路用两相流冷中频140kVA变压器的热设计
Pub Date : 2020-11-01 DOI: 10.1109/VPPC49601.2020.9330916
Kui Li, Xiang Xie, Kai He, Lei Yao, Zhaozan Feng, Tao Chen
In this paper, a cooling scheme and the corresponding thermal design method is proposed for high power high frequency transformer, which is used in power electronic transformer device for railway traction applications. Particularly, to address the overheating problem resulting from dimensional restriction and electrical insulation in railway applications, the cooling scheme based on actively cooled system with R245fa refrigerants is further enhanced by 2-phase flow cooling. The mathematic model of transformer copper and iron loss is first introduced. Subsequently, the required cooling area of transformer core is quantitatively calculated using thermal network method and the total pressure loss and heat transfer in two-phase flow is determined accordingly. Finally, the proposed thermal design method and corresponding cooling scheme are verified through the experiment on a 5.5kHz 140kVA transformer.
本文提出了一种用于铁路牵引电力电子变压器装置的大功率高频变压器的冷却方案及相应的热设计方法。特别是,为了解决铁路应用中由于尺寸限制和电气绝缘造成的过热问题,采用R245fa制冷剂的主动冷却系统的冷却方案进一步加强了两相流冷却。首先介绍了变压器铜铁损耗的数学模型。随后,利用热网络法定量计算变压器铁心所需的冷却面积,从而确定两相流的总压损失和换热量。最后,通过5.5kHz 140kVA变压器的实验验证了所提出的热设计方法和相应的冷却方案。
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引用次数: 0
Active Thermal Management for an Automotive Water-Cooled Proton Exchange Membrane Fuel Cell by Using Feedback Control 基于反馈控制的汽车水冷质子交换膜燃料电池主动热管理
Pub Date : 2020-11-01 DOI: 10.1109/VPPC49601.2020.9330959
Jin Zhang, Ya-Xiong Wang, Hongwen He, Yao Wang
Proton exchange membrane fuel cell (PEMFC) appears as a green energy to solve the environmental and energy problems in the automotive industry. Temperature changes in PEMFC affect fuel cell’s efficiency and lifetime. If the stack temperature is too low, the electrochemical reaction rate slows down, leading to inefficiency and shortening the working life of the stack. However, too high stack temperature may dry the membrane and decrease proton conductivity, or even destroy the membrane. Therefore, to avoid stack temperature fluctuations and maintain proper stack temperature, a thermal management-oriented model of the vehicular water-cooled PEMFC is presented, which is based on electrochemical reactions and thermodynamics. A PI associated with an ON/OFF feedback controller is designed to control the output mass flow rates of the circulating water pump and the radiator fans. To test the efficacy of the proposed model and controller, different load currents including typical driving cycles are applied. The results indicate that the stack temperature well tracks the reference temperature, and the temperature difference of cooling water in and out of the stack is less than 6°C.
质子交换膜燃料电池(PEMFC)作为一种解决汽车工业环境和能源问题的绿色能源而出现。PEMFC温度的变化会影响燃料电池的效率和寿命。如果堆温度过低,电化学反应速度减慢,导致效率低下,缩短堆的工作寿命。然而,过高的堆积温度可能使膜干燥,降低质子电导率,甚至破坏膜。因此,为了避免堆温波动,保持适当的堆温,提出了一种基于电化学反应和热力学的车用水冷PEMFC热管理模型。与开/关反馈控制器相关联的PI设计用于控制循环水泵和散热器风扇的输出质量流量。为了测试所提出的模型和控制器的有效性,应用了不同的负载电流,包括典型的驱动周期。结果表明:堆温与参考温度跟踪良好,堆内外冷却水温差小于6℃。
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引用次数: 7
How Pantograph Electric Arcs affect Energy Efficiency in DC Railway Vehicles 受电弓电弧如何影响直流轨道车辆的能源效率
Pub Date : 2020-11-01 DOI: 10.1109/VPPC49601.2020.9330954
A. Mariscotti, D. Giordano, A. D. Femine, D. Gallo, D. Signorino
In DC electrified railways pantograph electric arcs represent not only a disturbance, but the step change of the pantograph voltage affects power losses directly and indirectly. The available line voltage is reduced if the train is in traction condition, the arc itself is characterized by ohmic power losses, and the triggered oscillating transient responses are characterized by a net power loss. In addition, if arc occurs during braking the arc voltage suddenly increases the pantograph voltage and may interfere with the dissipative braking chopper, reducing the recovered energy. This work presents the model and analysis of these phenomena with experimental results for arcs measured on a 3 kV dc line in traction and braking conditions.
在直流电气化铁路中,受电弓电弧不仅是一种扰动,而且受电弓电压的阶跃变化直接或间接地影响着电力损耗。如果列车处于牵引状态,可用的线路电压就会降低,电弧本身的特征是欧姆功率损耗,而触发的振荡瞬态响应的特征是净功率损耗。此外,如果在制动过程中发生电弧,电弧电压会突然增加受电弓电压,并可能干扰耗散制动斩波器,减少回收的能量。本文提出了这些现象的模型和分析,并给出了在牵引和制动条件下在3kv直流线路上测量电弧的实验结果。
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引用次数: 5
Operational cost analysis of fuel cell electric vehicles under different powertrain-sizing configurations 不同动力总成尺寸配置下燃料电池电动汽车运行成本分析
Pub Date : 2020-11-01 DOI: 10.1109/VPPC49601.2020.9330986
Yang Zhou, A. Ravey, M. Péra
This paper presents an operation cost analysis of a fuel cell/battery-based plug-in hybrid electric vehicle under different sizing configurations. Specifically, the size of major energy source (e.g. the fuel cell system) is kept constant while altering the battery capacity. Dynamic programming is then employed to extract the vehicle’s operation costs imposed by the consumption of hydrogen and electricity power. Afterwards, a numerical analysis of the impacts on fuel economy, fuel cell durability, battery energy utilization rate is conducted, so as to provide useful guidelines to facilitate the powertrain design and the development of corresponding energy management strategies.
本文对一种燃料电池/电池混合动力汽车在不同尺寸配置下的运行成本进行了分析。具体来说,在改变电池容量的同时,主要能源(如燃料电池系统)的大小保持不变。然后采用动态规划的方法提取氢和电力消耗对车辆运行成本的影响。然后,对燃油经济性、燃料电池耐久性、电池能量利用率的影响进行了数值分析,为动力总成的设计和相应能量管理策略的制定提供了有益的指导。
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引用次数: 3
Ecological Adaptive Cruise Control for Urban Environments using SPaT Information 基于spv信息的城市环境生态自适应巡航控制
Pub Date : 2020-11-01 DOI: 10.1109/VPPC49601.2020.9330903
S. Chada, Ankith Purbai, D. Görges, Achim Ebert, R. Teutsch
This paper proposes an ecological adaptive cruise control (EACC) strategy to minimize the energy consumption of an electric vehicle using two linear model predictive controllers (MPCs). In the absence of a preceding vehicle, the first MPC uses the upcoming traffic light signal phase and timing (SPaT) information to track an optimal green-wave velocity to reach the next traffic light signal during green phase. For the preceding vehicle in range scenario, the second MPC follows the leading vehicle by maintaining a desired inter-vehicle distance and strictly adheres to road speed limits. If the upcoming traffic light signal phase is changing to red, the controller uses the SPaT information to plan an energy-efficient stop near the traffic light signal. To evaluate the performance of the proposed strategy, both controllers are tested in a realistic scenario against a baseline controller and furthermore their energy saving benefits are explored. Finally, investigations on computation time reveal that the proposed strategy is capable for online implementation.
本文提出了一种利用两个线性模型预测控制器(mpc)实现电动汽车能耗最小化的生态自适应巡航控制(EACC)策略。在没有前车的情况下,第一个MPC使用即将到来的交通灯信号相位和时序(SPaT)信息来跟踪最佳绿波速度,以便在绿灯阶段到达下一个交通灯信号。对于前一辆车,第二辆MPC跟随前一辆车,保持期望的车间距离,并严格遵守道路速度限制。如果即将到来的交通灯信号阶段变为红色,控制器使用该信息在交通灯信号附近计划一个节能停车。为了评估所提出的策略的性能,在现实场景中对两个控制器进行了基准控制器的测试,并进一步探讨了它们的节能效益。最后,对计算时间的研究表明,该策略可以在线实现。
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引用次数: 5
Loss analysis and calculation of IPMSM with SiC inverter based on field circuit coupling method 基于场路耦合法的SiC逆变器IPMSM损耗分析与计算
Pub Date : 2020-11-01 DOI: 10.1109/VPPC49601.2020.9330909
Xiao Ju, Yuan Cheng, Mingliang Yang, K. Yao, Ling Ding, S. Cui
In the early design stage of electric drive system, electric machine performance and controller performance usually cannot be considered at the same time. The torque and speed range of traction machine is large, and the harmonic loss caused by current harmonic generated by PWM power supply will not be ignored. The working point of electric vehicle traction machine changes frequently. The current harmonics vary with the working point because the electric machine magnetic field saturation degree is different. In order to solve this problem, a simulation model for fast prediction of harmonic current at each working point is established in this paper. Firstly, the analytical models of SiC device and machine loss are analyzed. Then, based on the experimental prototype parameters, the finite element model of the machine is established, and the dq axes current of different working points are extracted. Based on the field circuit coupling method, a system level simulation analysis model is built, which can realize the current harmonic extraction and loss calculation at different working points. Finally, the effectiveness of the model is verified by selecting the corresponding work points. The results show that the optimized switching frequency can further reduce the system loss. Compared with the traditional Si devices, the high switching frequency of SiC is beneficial to further reduce the harmonic loss.
在电传动系统的早期设计阶段,通常不能同时考虑电机性能和控制器性能。牵引机的转矩和转速范围较大,PWM电源产生的电流谐波造成的谐波损耗不容忽视。电动汽车牵引机的工作点变化频繁。由于电机磁场饱和程度的不同,电流谐波随工作点的不同而变化。为了解决这一问题,本文建立了快速预测各工作点谐波电流的仿真模型。首先,分析了SiC器件和机器损耗的分析模型。然后,基于实验样机参数,建立机床有限元模型,提取不同工作点的dq轴电流;基于场路耦合方法,建立了系统级仿真分析模型,实现了不同工作点的电流谐波提取和损耗计算。最后,通过选择相应的工作点来验证模型的有效性。结果表明,优化后的开关频率能进一步降低系统损耗。与传统的硅器件相比,SiC的高开关频率有利于进一步降低谐波损耗。
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引用次数: 0
Energetic Macroscopic Representation of Scalable PMSM for Electric Vehicles 电动汽车可伸缩永磁同步电机的能量宏观表示
Pub Date : 2020-11-01 DOI: 10.1109/VPPC49601.2020.9330981
W. Lhomme, F. Verbelen, M. Ibrahim, K. Stockman
In this paper, an innovative model structuration is proposed to describe scaled Permanent Magnet Synchronous Machines (PMSM) at system level. By using the Energetic Macroscopic Representation formalism (EMR), the equations of the scaling laws are reorganized. The restructuration consists of a reference PMSM model complemented with two electrical and mechanical power adaptation elements. These latter elements take care of the scaling effects, including the power losses. The methodology is applied to scale the power of a PMSM for an electric vehicle, by a factor of 2. According to the studied designs, an average efficiency from 83.7% to 87.1% is obtained during an urban driving cycle.
本文提出了一种新颖的模型结构来描述规模化永磁同步电机(PMSM)。利用能量宏观表示形式(EMR)对标度律方程进行了重组。重构由一个参考PMSM模型和两个电气和机械功率自适应元件组成。后一种因素考虑了缩放效应,包括功率损耗。将该方法应用于电动汽车的永磁同步电机功率按2倍进行缩放。根据所研究的设计,在一个城市行驶周期内,平均效率为83.7% ~ 87.1%。
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引用次数: 4
Research on Multi-Vector Cascaded Model Predictive Control of Induction Motors 感应电机多向量级联模型预测控制研究
Pub Date : 2020-11-01 DOI: 10.1109/VPPC49601.2020.9330845
Ling Feng, Jianguo Fu, Cheng Li
When using single vector model predictive control, the direction of output voltage in each control cycle is limited. Therefore, there is pulsation and a quite large harmonic distortion in stator current. In this paper, a novel cascade multi-vector model predictive control strategy is proposed. Firstly, the model predictive controller is used to replace the traditional linear controller in the external speed loop, and a three-vector model predictive controller is designed in the internal current loop. The amplitude and direction of output voltage vector are adjustable which improves the performance of the current control. As multi-vector model predictive control will increase the switching frequency of the system, we construct a cost function with switching frequency constraints to solve this issue. Finally, the proposed control strategy is verified on the asynchronous motor experiment set that it can improve the current tracking performance and effectively reduce the switching frequency of the inverter while maintaining the speed loop with good dynamic and static performance.
当采用单向量模型预测控制时,每个控制周期的输出电压方向是有限的。因此,定子电流存在脉动和较大的谐波畸变。提出了一种新的串级多向量模型预测控制策略。首先,用模型预测控制器代替传统的外速度环线性控制器,在电流环内设计三向量模型预测控制器。输出电压矢量的幅度和方向可调,提高了电流控制的性能。由于多向量模型预测控制会增加系统的开关频率,我们构造了一个带有开关频率约束的代价函数来解决这个问题。最后,在异步电机实验装置上验证了所提出的控制策略可以提高电流跟踪性能,有效降低逆变器的开关频率,同时保持速度环具有良好的动、静态性能。
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引用次数: 1
Rule-Based Energy Management Strategy of Fuel Cell/Ultracapacitor/Battery Vehicles: winner of the IEEE VTS Motor Vehicles Challenge 2020 燃料电池/超级电容器/电池汽车基于规则的能量管理策略:IEEE VTS汽车挑战赛2020冠军
Pub Date : 2020-11-01 DOI: 10.1109/VPPC49601.2020.9330930
A. Ferrara, C. Hametner
This paper focuses on the energy management of fuel cell/ultracapacitor/battery hybrid vehicles. A robust rule-based strategy is proposed to effectively reduce hydrogen consumption, increase vehicle lifetime, and handle multiple constraints. This strategy won the IEEE VTS Motor Vehicles Challenge 2020. The formulation of the control rules is heavily based on the vehicle model and the analysis of the assigned cost function. A stochastic generation of driving scenarios is proposed to deal with the limited information provided by the challenge, guarantying a robust design of the energy management strategy. The results are analyzed on a large set of synthetic driving cycles.
本文主要研究燃料电池/超级电容器/电池混合动力汽车的能量管理问题。提出了一种基于规则的鲁棒策略,以有效降低氢消耗,延长车辆寿命,并处理多重约束。这一策略赢得了2020年IEEE VTS汽车挑战赛。控制规则的制定在很大程度上是基于车辆模型和分配成本函数的分析。提出了一种随机生成驾驶场景的方法来处理挑战所提供的有限信息,保证了能量管理策略的鲁棒性设计。结果在一组大的合成驾驶循环上进行了分析。
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引用次数: 3
期刊
2020 IEEE Vehicle Power and Propulsion Conference (VPPC)
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