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2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)最新文献

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The Simulation Research of Power Distributor Based on RTDS 基于RTDS的配电系统仿真研究
Pub Date : 2018-11-01 DOI: 10.1109/CIEEC.2018.8745807
Xu Zhuansun, Weiqiang Fan, Yifei Wang, Fuming Li, Fei Xu, Anming Zhu, Zaiqiang Li
With the rapid development of the energy Internet, parallel operation between power grids is an inevitable trend, and energy scheduling between power grids is particularly important. This paper proposes a power splitter for connecting various power grids, including distributed power grids, large power grids and passive distribution networks. It can realize energy dispatch between power grids and has power quality management functions. This paper first introduces the topology, working principle and functional advantages of the power splitter; then proposes a control strategy and operation mode for energy scheduling, and builds a simulation model of the power splitter on the RTDS system. The final test proves: The power splitter is connected to multiple asynchronous grids, and the grid connection speed is fast and the impact is small. After parallel operation, the power flow direction and size of the power grid are flexibly controlled, and the reactive power compensation function is provided to improve the power quality of the grid.
随着能源互联网的快速发展,电网间并网运行是必然趋势,电网间能源调度显得尤为重要。本文提出了一种用于连接各种电网的功率分配器,包括分布式电网、大电网和无源配电网。实现电网间的能量调度,具有电能质量管理功能。本文首先介绍了功率分配器的拓扑结构、工作原理和功能优势;提出了能量调度的控制策略和运行模式,并在RTDS系统上建立了功率分配器的仿真模型。最后的测试证明:功率分配器连接多个异步电网,并网速度快,影响小。并网运行后,灵活控制电网的潮流方向和规模,并提供无功补偿功能,改善电网的电能质量。
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引用次数: 0
Risk Assessment Method of Distribution Network with considering Multiple Photovoltaic Generations Uncertainties 考虑多光伏发电不确定性的配电网风险评估方法
Pub Date : 2018-11-01 DOI: 10.1109/CIEEC.2018.8745848
Hua Xie, Hao Chen, Ning Wang, Pei Zhang
More and more photovoltaic generation power has been integrated into the distribution network. Uncertainties of PV generation bring risks to system operation of the distribution network. In this paper, a new method was proposed for risk assessment of distribution network with consideration of multiple PVs’ uncertainties. Firstly, probabilistic characteristics of each PV generation was forecasted using dynamic Bayesian network(DBN). Secondly, multiple PV generation uncertainties were calculated with consideration of the probability of each operating state. And then power network severities in terms of thermal and voltage violations were calculated. Finally, the system risk indices were computed by using probability multiply severity. A practical distribution system with multiple PV generations was used as case study. The research results indicated that the proposed method was effective in evaluating system operation risk and was helpful for system operators.
越来越多的光伏发电并入配电网。光伏发电的不确定性给配电网的系统运行带来了风险。本文提出了一种考虑多pv不确定性的配电网风险评估新方法。首先,利用动态贝叶斯网络(DBN)对每台光伏发电的概率特征进行预测;其次,考虑各运行状态的概率,计算多个光伏发电不确定性;然后计算了电网在热和电压方面的严重程度。最后,采用概率乘严重性法计算系统风险指标。以一个实际的多光伏发电配电网为例进行了研究。研究结果表明,该方法对系统运行风险评估是有效的,对系统操作人员有一定的帮助。
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引用次数: 0
Path Optimization of Adaptive Dynamic Wireless Charging 自适应动态无线充电路径优化
Pub Date : 2018-11-01 DOI: 10.1109/CIEEC.2018.8745990
Yuhong Li, Z. Liang, Xian Zhang, Pingjuan Niu, Wenting Ma, Lili Han
The dynamic wireless power supply technology can be applied to electric vehicles, industrial mobile robots and other fields. By organically combining the original independent charging state and working state, the work efficiency is greatly improved, and to a large extent, the application of battery is reduced. Map combined with hall principle and simulation of magnetic field, we put forward a kind of based on the principle of hall is adaptive dynamic wireless power supply path optimization idea, make it according to the received in the process of mobile adaptive moving magnetic field strength, and the corresponding construct the magnetic field distribution map of drawing out the optimal path, automatic and intelligent dynamic wireless power supply.
动态无线供电技术可应用于电动汽车、工业移动机器人等领域。通过将原有的独立充电状态与工作状态有机结合,大大提高了工作效率,在很大程度上减少了电池的应用。结合霍尔图原理和磁场仿真,我们提出了一种基于霍尔图原理的自适应动态无线供电路径优化思路,使其根据移动过程中接收到的自适应移动磁场强度,并相应构建出磁场分布图,绘制出最优路径,实现动态无线供电的自动化和智能化。
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引用次数: 0
Fault Location Strategy for Wide Area Protection Based on Logical Information Fusion 基于逻辑信息融合的广域保护故障定位策略
Pub Date : 2018-11-01 DOI: 10.1109/CIEEC.2018.8745986
Chunlei Zhao, Yingli Wei, Liqiang Sun, Jing Liu, Binbin Zhang, Haibin Chen, C. Tan
A new information fusion is proposed in this paper. First, the concept of distance protection rough setting depending on sensitivity is defined. On this basis, the startup information of each segment in regional power grid can be obtained, and the state matrix of connection of regional grid can be constructed combined with network topology and circuit breaker state. Then, according to this state matrix, the protection startup recorded matrix can be built and the wide area fault identification criterion can be constructed. This method simplifies the principle of setting coordination of local protection without the effect of information nonsynchronous. Furthermore, in the case of missing or incorrect startup information, the correctness of fault locating still remain. Finally, a certain electric network in Guizhou Province verify the correctness and feasibility of the proposed method.
本文提出了一种新的信息融合方法。首先,定义了基于灵敏度的距离保护粗整定的概念。在此基础上,可以获得区域电网中各分段的启动信息,并结合网络拓扑结构和断路器状态构建区域电网连接状态矩阵。然后根据该状态矩阵建立保护启动记录矩阵,构造广域故障识别判据。该方法简化了局部保护协调设置的原理,避免了信息不同步的影响。此外,在启动信息缺失或错误的情况下,故障定位的正确性仍然存在。最后,以贵州省某电网为例,验证了所提方法的正确性和可行性。
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引用次数: 0
Effects of Silicone Grease on Silicone Rubber in Physical Characteristics 硅脂对硅橡胶物理特性的影响
Pub Date : 2018-11-01 DOI: 10.1109/CIEEC.2018.8745997
Bin Zhu, Hao Hu, Zhi-dong Jia, Guo-jun Lu, Yong Wang, Wei-nan Fan, Chaoping Lei
For the purpose of sealing and convenient installation, silicone grease is coated where cable and cable accessory engage. However, grease can cause swelling of silicone rubber, affecting the physical characteristics of silicone rubber. This paper researched on the swelling behavior of silicone rubber caused by silicone grease under different tensile deformations with measuring the mass, volume, density, hardness, tensile strength at break, elongation at break and elastic modulus during swelling process. The four test groups of unswelling & untensile, swelling & untensile, swelling & tensile-20%, swelling & tensile-40% had been set, and the parameters were measured every 24 hours during the swelling of the silicone rubber coated with silicone grease. Significant increase in the mass and volume had took place during the swelling process, which indicated that silicone grease could cause serious swelling of silicone rubber. While silicone rubber was in the state of stretched, the quantity and sizes of pores both increase, leading to a severer state of swelling. What’s more, significant decrease in the hardness, tensile strength at break and elongation at break had been observed from the measurements during the swelling process, indicating the deterioration of physical characteristics, which would have effects on the insulation condition of the interface of SiR/XLPE.
为了密封和方便安装,电缆和电缆附件接合处涂有硅脂。但润滑脂会使硅橡胶膨胀,影响硅橡胶的物理特性。通过测量硅橡胶的质量、体积、密度、硬度、断裂抗拉强度、断裂伸长率和膨胀过程中的弹性模量,研究了硅橡胶在不同拉伸变形下的膨胀行为。设置不膨胀不拉伸、膨胀不拉伸、膨胀拉伸-20%、膨胀拉伸-40%四个试验组,在涂硅脂的硅橡胶膨胀过程中每24小时测量一次参数。在膨胀过程中,硅橡胶的质量和体积都有明显的增加,说明硅脂会引起硅橡胶的严重膨胀。当硅橡胶处于拉伸状态时,孔隙的数量和大小都增加,导致膨胀状态更加严重。膨胀过程中硬度、断裂抗拉强度和断裂伸长率均有明显下降,表明物理特性变差,这将影响SiR/XLPE界面的绝缘状态。
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引用次数: 4
A Method for Reducing Commutation Failure Risk in Multi-Infeed HVDC Systems 降低多馈入直流系统换相失效风险的方法
Pub Date : 2018-11-01 DOI: 10.1109/CIEEC.2018.8745815
Luhua Xing, Dong Yang, Pan-pan Jing, Pengfei Zhang
This paper presents a method to reduce the risk of single or multiple commutation failures in multi-infeed HVDC systems caused by AC faults occurring at the receiving-end AC system. Based on the node impedance matrix, a voltage coupling factor (VCF) is derived to analyze the effect of faults on AC buses on voltage of inverter AC buses. Then, a method to reduce the commutation failure risk of multi-infeed DC systems is proposed, combining with the criterion of commutation failure based on the minimum extinction angle. In the design stage of converter stations, the short-circuit impedance of converter transformers should be reduced as much as possible on the basis of considering all kinds of restrictive factors. By using this method, the critical voltage coupling factor can be increased and the commutation failure risk can be reduced. The effectiveness of this method is demonstrated by the electromechanical-electromagnetic hybrid simulation results based on a practical multi-infeed HVDC system.
本文提出了一种降低因接收端交流系统发生交流故障而导致多馈直流系统单次或多次换相故障风险的方法。基于节点阻抗矩阵,推导了电压耦合因子(VCF),分析了交流母线故障对逆变器交流母线电压的影响。然后,结合基于最小消光角的换相失效准则,提出了一种降低多馈入直流系统换相失效风险的方法。在换流站设计阶段,应在综合考虑各种制约因素的基础上,尽可能降低换流站变压器的短路阻抗。采用该方法可以提高临界电压耦合系数,降低换相失效风险。基于实际多馈入直流系统的机电电磁混合仿真结果验证了该方法的有效性。
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引用次数: 0
Calculations of dielectrophoretic forces on non-homogenous dielectric particles with different shapes 不同形状非均匀介电粒子上介电力的计算
Pub Date : 2018-11-01 DOI: 10.1109/CIEEC.2018.8745733
Haibing Li, Jie Zhu, Zhuo Zhang, Wei Yang, Z. Xing, X. Bian
Dielectrophoresis has become a very important tool in the aspect of utilizing microscopic dielectric particles in recently years. More and more developments have been achieved in various subjects, such as: chemistry, life science, astronomy and engineering. In these developments, manipulation of these small dielectric particles is the main problem due to quantifying FDEP (dielectrophoretic forces). Point-Dipole (PD) and Maxwell Stress Tensor (MST) methods are commonly used for quantifying in current researches. PD method is a simplified way which can be used in the condition that particles are all homogenous and spherical, while their existences don’t change external electric fields. MST method is a more exact way for the calculation which is able to consider particles’ shape and the deformation of particles to external electric fields, however, it is limited to homogenous particles. In order to overcome the limitations above, a new method VEM (Volumetric Element Method) was introduced into the calculation. With the method, FDEP on a homogenous and non-homogenous particles with different shapes (sphere, ellipsoid, square) were calculated under an electric field. Differences among the three methods are compared and analyzed. Finally, it was found that PD method is not suitable when the deformations of particles on external electric fields were very strong, but VEM and MST still kept a good performance. What’s more, it indicated that variations of shapes and homogeneity changing the volume and dielectric constant of particles would influence FDEP acting on particles.
近年来,介质电泳技术已成为利用微观介质颗粒的一种重要手段。在化学、生命科学、天文学和工程学等各个学科上取得了越来越多的发展。在这些发展中,由于FDEP(介电泳力)的量化,这些小介电粒子的操作是主要问题。目前研究中常用的定量方法是点偶极子法和麦克斯韦应力张量法。PD法是一种简化的方法,可以在粒子都是均匀球形的情况下使用,同时它们的存在不改变外电场。MST法是一种比较精确的计算方法,它可以考虑粒子的形状和粒子在外加电场作用下的变形,但它仅限于均匀粒子。为了克服上述局限性,在计算中引入了体积元法(VEM)。用该方法计算了电场作用下不同形状(球体、椭球体、正方形)的均匀粒子和非均匀粒子的FDEP。比较分析了三种方法的差异。最后发现,当粒子在外加电场作用下变形非常强烈时,PD方法并不适用,而VEM和MST仍然保持了良好的性能。此外,形状和均匀性的变化改变了粒子的体积和介电常数,会影响作用于粒子的FDEP。
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引用次数: 0
CIEEC 2018 Table of Contents 2018中国经济贸易博览会目录
Pub Date : 2018-11-01 DOI: 10.1109/cieec.2018.8745746
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引用次数: 0
Study on Effect of Metal Objects Intervention in Wireless Power Transfer for EV 金属物体对电动汽车无线电力传输的影响研究
Pub Date : 2018-11-01 DOI: 10.1109/CIEEC.2018.8745897
Wei Bin, Wu Xiaokang, X. Jinxing, Fu Zhi-yuan
At present, the analyzes of wireless charging system is mostly based on ideal state. When metal obstacle appears in the system, the system parameters will change. This paper takes the electric vehicle wireless charging system as the research objects, and analyzes the variation rules of the system resonance frequency and transmission efficiency when metal foreign matter appears at different positions within the fixed distance plane near the transmitter coil. When the metal objects on the transmitter coil, the transmission frequency of the system increased by 0.5kHz, and the transmission efficiency decreased by 5%.
目前,对无线充电系统的分析大多是基于理想状态的。当系统中出现金属障碍物时,系统参数会发生变化。本文以电动汽车无线充电系统为研究对象,分析了当金属异物在发射器线圈附近固定距离平面内不同位置出现时,系统谐振频率和传输效率的变化规律。当发射线圈上有金属物体时,系统的传输频率增加0.5kHz,传输效率降低5%。
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引用次数: 1
An Evaluation Method of Diversified Load Absorptive Ability in Distribution Network Based on Hierarchical Component Theory 基于层次分量理论的配电网多样化负荷吸收能力评价方法
Pub Date : 2018-11-01 DOI: 10.1109/CIEEC.2018.8746000
Xianing Jin, Jian Zhang, Yan-Si Qu, Yi Song, Weihong Yang, Jing Xu
With the maturity of the electric power industry and the development of the market, the load types become complex and diverse. The diversified load mentioned in this paper refers to nontraditional loads with active characteristics, such as electric vehicles charging and discharging facilities, energy storage systems, grid-connected microgrid and etc. For the effective planning of the diversified load integration into distribution network, an evaluation method of diversified load absorptive ability is presented in this paper based on the idea of hierarchical components. Firstly, a hierarchical component analysis method is proposed. Secondly, a rationality evaluation index system is presented from the perspective of safe operation, power quality and energy management to guarantee the effect integration of diversified load. Finally, the maximum absorptive ability of diversified load is evaluated by gradually increasing the capacity of the diversified load integration and adjusting the integration scheme, using "exploratory adjustment + linear interpolation" method. Rationality assessment of the absorptive capacity of distribution network for diversified load could promote the coordinated development of diversified load and power grid. This reasonable evaluation method could provide theoretical and technical support for scientific and orderly integration of diversified load to distribution network.
随着电力工业的成熟和市场的发展,负荷类型变得复杂多样。本文所说的多样化负荷是指具有主动特性的非传统负荷,如电动汽车充放电设施、储能系统、并网微电网等。为了有效规划配电网的多样化负荷整合,提出了一种基于分层分量思想的多样化负荷吸收能力评价方法。首先,提出了一种层次成分分析方法。其次,从安全运行、电能质量和能源管理的角度提出了一套合理性评价指标体系,以保证多样化负荷的效果整合。最后,采用“探索性调整+线性插值”的方法,通过逐步增加多元负荷集成的容量和调整集成方案来评估多元负荷的最大吸收能力。合理评价配电网对多种负荷的吸收能力,可以促进多种负荷与电网的协调发展。这种合理的评价方法可为配电网中各种负荷的科学有序整合提供理论和技术支持。
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引用次数: 0
期刊
2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)
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