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2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)最新文献

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Improved emergency control strategy with optimal control time based on dynamic security region 改进的基于动态安全域的最优控制时间应急控制策略
Pub Date : 2013-10-01 DOI: 10.1109/TENCON.2013.6718824
Wang Xiran, Liu Huaidong, Fan Yanyang, Chen Wei
Through a mount of simulations of power system emergency control, it is confirmed that action time of emergency control affects the transient stability of power system. This paper introduces control time component in the consideration of the existing emergency control model which is based on the dynamic security region(DSR). This paper quantifies the degree of system instability parameter after shedding loads and tripping generators at certain time when fault occurs. It puts forward a improved emergency control method with optimal acting time. This method can reflect the condition of the instability of power system and give the optimal moment of concentrated loads shedding and generators tripping. Simulation on IEEE 4-generator 11-bus system shows that taking emergency control at the improved method can decrease the vibration of the system, and minimize the cost of emergency control strategy.
通过对电力系统应急控制的大量仿真,证实了应急控制的作用时间对电力系统暂态稳定的影响。在现有的基于动态安全区域的应急控制模型的基础上,引入了控制时间分量。本文量化了系统在故障发生时一定时间脱载跳闸后的失稳程度参数。提出了一种改进的最优作用时间应急控制方法。该方法能反映电力系统的不稳定状态,给出集中卸荷和发电机跳闸的最佳时刻。对IEEE 4-发电机11-母线系统的仿真表明,采用改进的方法进行应急控制可以降低系统的振动,使应急控制策略的成本最小化。
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引用次数: 1
A novel method to calculate QoE-oriented dynamic weights of indicators for telecommunication service 一种面向qos的电信业务指标动态权重计算方法
Pub Date : 2013-10-01 DOI: 10.1109/TENCON.2013.6718476
Liyan You, Wen’an Zhou, Zhang Chen, Wenfeng Wu
Quality of Experience (QoE) becomes recently the most important tendency to guarantee the quality of telecommunication services. In this paper, we proposed a three-step approach to calculate the weights of KPIs in the KQI (Key Quality Indicators) / KPI (Key Performance Indicators) assessment architecture for QoE evaluation. First, indicators are classified into two sets (Static Set and Dynamic Set) according to their change degree represented by their standard deviation. Second, for indicators in dynamic set, a changes-sensitive method for calculating dynamic weights (CMDW) is proposed, which takes into account not only the relative importance but also the change of the indicators. And for indicators in static set, we use a subjective method to get the corresponding weights. At last the weights of indicators in the two set are combined. As a result, the weights determined using the proposed method can not only combine subjective and objective information but also reflect the change of the indictors on QoE evaluation.
体验质量(Quality of Experience, QoE)是保证电信服务质量的重要趋势。在本文中,我们提出了一种三步法来计算关键质量指标(KQI) /关键绩效指标(KPI)评估体系中关键绩效指标的权重。首先,根据指标的标准差所代表的变化程度,将指标分为静态集和动态集两组。其次,对于动态集中的指标,提出了一种既考虑相对重要性又考虑指标变化的动态权重计算方法(CMDW)。对于静态集的指标,我们采用主观的方法得到相应的权重。最后对两组指标的权重进行合并。因此,采用该方法确定的权重既能将主观信息与客观信息相结合,又能反映质量oe评价指标的变化情况。
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引用次数: 4
Comparison of binary hologram generation methods: Sampling on the object image scene and error diffusion method on the hologram plane 二值全息图生成方法的比较:在物象场景上采样和在全息平面上误差扩散法
Pub Date : 2013-10-01 DOI: 10.1109/TENCON.2013.6718501
Shuming Jiao, P. Tsang
Holography is a technique to record and reconstruct a three dimensional scene on a 2D plane, which is called a hologram. As a special kind of 2D image, the digital image processing of holograms such as gray level image binarization can be quite different from conventional images. The generation of binary holograms from gray level holograms can be implemented not only with conventional dithering or error diffusion methods but also sampling methods on the object image proposed recently. This paper compares the reconstructed image quality of binary holograms generated by the traditional error diffusion method on the hologram plane and the new random plus adaptive sampling method on the object image. The advantages and disadvantages of two methods are analyzed critically and illustrated with examples.
全息术是一种在二维平面上记录和重建三维场景的技术,称为全息图。全息图作为一种特殊的二维图像,其灰度图像二值化等数字图像处理方法与传统图像有很大的不同。从灰度全息图生成二值全息图不仅可以采用传统的抖动或误差扩散方法,而且可以采用最近提出的对目标图像进行采样的方法。本文比较了传统的误差扩散方法在全息平面上和新的随机加自适应采样方法在物体像上产生的二值全息图的重建像质量。对两种方法的优缺点进行了批判性分析,并举例说明。
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引用次数: 3
Influence factors on the azimuthally uniform feed in single-point feed induction voltage adder 单点进给感应电压加法器进给方位均匀性的影响因素
Pub Date : 2013-10-01 DOI: 10.1109/TENCON.2013.6718464
Hao Wei, A. Qiu, Jiahui Yin, F. Sun, J. Zeng, Yixiang Hu
Achieving an azimuthally uniform feed is of greatly significance for induction cells in magnetically insulated induction voltage adder (MIVA). The azimuthal uniformity of feed currents around cell bores is affected by various factors. In this paper, the effects of several factors, such as adder impedances of the inner stalk, cell locations in multi-stage MIVA systems, and time spreads between parallel driving pulses, on the feed uniformity are simulated and analyzed. The single-point feed MIVA version is chosen as the basis of analysis. A 3D fully electromagnetic model without particle features is developed for a single cell and an adder with three cells in series, respectively. Simulation results demonstrate that, as adder impedances of the inner stalk and load impedances increase, the azimuthal uniformity is improved slightly, i.e., a higher MITL impedance is a bit helpful for current symmetrization. Simulation results also indicate that, the non-uniformity within the first cell is little worse than other cells downstream, however, the effects of cell locations could be negligible. The time spreads between driving pulses for single-point feed MIVA systems nearly not affect the distribution tendency and azimuthal uniformity of feed currents, while badly changing the waveforms and the numerical values of feed currents and cell output voltage.
在磁绝缘感应电压加法器(MIVA)中,实现方位均匀进给对感应电池具有重要意义。胞孔周围馈电电流的方位均匀性受到多种因素的影响。本文模拟分析了内杆加法器阻抗、多级MIVA系统的单元位置、并联驱动脉冲间隔时间等因素对馈电均匀性的影响。选择单点进给MIVA版本作为分析的基础。建立了单单元和加法器的无粒子特征三维全电磁模型。仿真结果表明,随着内杆加法阻抗和负载阻抗的增大,方位均匀性略有改善,即较高的MITL阻抗有利于电流的均匀化。模拟结果还表明,第一个小区内的非均匀性比下游其他小区稍差,但小区位置的影响可以忽略不计。单点馈电MIVA系统的驱动脉冲间隔时间几乎不影响馈电电流的分布趋势和方位均匀性,但会严重改变馈电电流和电池输出电压的波形和数值。
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引用次数: 1
Joint user-antenna selection scheme in multiuser two-way relaying system with TDBC protocol 基于TDBC协议的多用户双向中继系统中的联合用户天线选择方案
Pub Date : 2013-10-01 DOI: 10.1109/TENCON.2013.6719017
Xiabin Qian, Jing Li, J. Ge, Chensi Zhang
This paper considers a multiuser two-way relaying system with time division broadcast (TDBC) protocol, where one multiantenna base station (BS) and one out of N single-antenna mobile stations (MSs) exchange information with the aid of one single-antenna amplify-and-forward (AF) relay. We first propose an optimal joint user-antenna selection scheme, which minimizes the system outage probability. Then by fixing the power allocation factor at the relay, a low-complexity suboptimal scheme is proposed and compared with the optimal scheme. Simulation results show that the proposed schemes can achieve full diversity order and there is a small performance gap between them. Furthermore, the suboptimal scheme is more robust to the channel estimation errors than the optimal counterpart.
本文研究了一种采用时分广播(TDBC)协议的多用户双向中继系统,其中1个多天线基站(BS)和1 / N个单天线移动站(MSs)借助1个单天线放大转发(AF)中继进行信息交换。首先提出了一种使系统中断概率最小的联合用户天线选择方案。然后通过确定继电器处的功率分配因子,提出了一种低复杂度的次优方案,并与最优方案进行了比较。仿真结果表明,所提方案能够实现全分集顺序,且性能差距较小。此外,次优方案比最优方案对信道估计误差的鲁棒性更强。
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引用次数: 1
ASIC/FPGA implementation of cochlear implant CIS algorithm based on FFT filter bank 基于FFT滤波器组的人工耳蜗CIS算法的ASIC/FPGA实现
Pub Date : 2013-10-01 DOI: 10.1109/TENCON.2013.6718992
Haichen Zhao, X. Deng, Qi Liang, Yixin Zhao
Speech processor is the key digital signal processor in a cochlear implant. The performance of the speech processing algorithm utilized by the speech processor is deeply relating the overall power dissipation, size and performances of the cochlear implant. CIS (Continuous Interleaved Sampling) algorithm is the most famous and used algorithm in the cochlear implant speech processing. This article uses a FFT (Fast Fourier Transform) filter bank instead of the traditional IIR (Infinite Impulse Response) or FIR (Finite Impulse Response) filter banks to process the speeches in frequency domain. It can easily switch the channels, and bring little extra consumption when increasing channels with the same FFT. A FPGA prototype is used for real speech timing simulations which prove the advantages of the design.
语音处理器是人工耳蜗中关键的数字信号处理器。语音处理器所采用的语音处理算法的性能直接关系到人工耳蜗的整体功耗、尺寸和性能。CIS (Continuous Interleaved Sampling)算法是人工耳蜗语音处理中最著名和最常用的算法。本文使用FFT(快速傅立叶变换)滤波器组代替传统的IIR(无限脉冲响应)或FIR(有限脉冲响应)滤波器组在频域处理语音。它可以很容易地切换信道,并且在增加相同FFT的信道时带来很少的额外消耗。用FPGA原型进行了真实的语音时序仿真,验证了该设计的优越性。
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引用次数: 1
Synchronization strategy of microgrid from islanded to grid-connected mode seamless transfer 微电网由孤岛模式向并网模式无缝转移的同步策略
Pub Date : 2013-10-01 DOI: 10.1109/TENCON.2013.6718475
Haizhen Xu, Xing Zhang, Fang Liu, Debin Zhu, Rongliang Shi, Hua Ni, W. Cao
Microgrid should be operated in both grid-connected and islanded mode to ensure high voltage quality and reliability. In the case of continuous uninterrupted power supply, seamless transfer is important between the two modes,and synchronization of the voltage of the point of common coupling (PCC) and utility grid should be finished first to achieve the goal. In this paper varies of synchronization strategies used in different microgrid control structures from islanded mode to grid-connected mode are summarized, and a new method based on droop control is proposed. This method does not affect power sharing during synchronization procedure. Simulation and experiment results are presented to show the feasibility of the method.
微电网应采用并网和孤岛两种运行方式,以保证高电压质量和可靠性。在连续不间断供电的情况下,两种模式之间的无缝转换非常重要,要实现这一目标,首先要完成PCC点与公用电网电压的同步。本文总结了从孤岛模式到并网模式的不同微网控制结构所采用的同步策略,提出了一种基于下垂控制的微网同步策略。此方法不影响同步过程中的功率共享。仿真和实验结果表明了该方法的可行性。
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引用次数: 36
SentReP: Sentiment Classification of Movie Reviews using Efficient Repetitive Pre-Processing 基于高效重复预处理的电影评论情感分类
Pub Date : 2013-10-01 DOI: 10.1109/TENCON.2013.6718944
Asha S. Manek, R. Pallavi, Veena H. Bhat, P. D. Shenoy, M. Mohan, K. Venugopal, L. Patnaik
Opinions are highly essential for decision making and popular among the internet users. People with malicious intentions tend to give fake reviews to encourage or degrade the products. Reviewing movies is gaining popularity among web users, at the same time cannot be trusted. In this work, we propose a model Sentiment Classification of Movie Reviews using Efficient Repetitive Pre-processing (SentReP) that is based on tested parameters and a focused pre-processing technique to classify opinions. Working on the Cornell Movie review data set, this work significantly proves the accuracy and effectiveness of SentReP across different volumes of data and when compared to other different prevailing approaches. Overall this approach is very efficient in analyzing sentiments of movie reviews.
意见对决策非常重要,在互联网用户中很受欢迎。心怀恶意的人往往会给出虚假评论来鼓励或贬低产品。影评在网络用户中越来越受欢迎,同时也不可信。在这项工作中,我们提出了一个基于有效重复预处理(SentReP)的电影评论情感分类模型,该模型基于测试参数和集中预处理技术来对意见进行分类。在康奈尔电影评论数据集上,这项工作显著地证明了SentReP在不同数据量上的准确性和有效性,并与其他不同的流行方法进行了比较。总的来说,这种方法在分析电影评论的情绪方面非常有效。
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引用次数: 7
Symbolic fault modeling for switched-capacitor circuits 开关电容电路的符号故障建模
Pub Date : 2013-10-01 DOI: 10.1109/TENCON.2013.6719067
J. Cheng, G. Shi, Andy Tai, F. Lee
A symbolic construction method allowing for parameter limit operation is proposed. Switched-capacitor circuits can be analyzed with this method by creating a symbolic z-domain transfer function represented in the form of a Binary Decision Diagram (BDD). Manipulating the symbols in BDD can simulate a variety of circuit faults, such as switch faults, capacitor faults, and opamp gain faults. Implementation methods are presented and illustration examples are provided.
提出了一种允许参数极限运算的符号构造方法。通过创建以二进制决策图(BDD)形式表示的符号z域传递函数,可以用这种方法分析开关电容电路。操纵BDD中的符号可以模拟各种电路故障,如开关故障、电容故障和运放增益故障。给出了实现方法并给出了实例说明。
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引用次数: 7
The comparison of common control strategies in grid-connected double-fed wind generators 并网双馈风力发电机常用控制策略的比较
Pub Date : 2013-10-01 DOI: 10.1109/TENCON.2013.6718995
L. Y. Chen, Z. Y. Li
As the penetration of wind power is high, in power system planning, it is difficult to acquire the detailed model of wind generators to be installed because of the commercial secrets. This paper discussed the mathematical models and typical control strategies of grid-connected double-fed wind generator (DFIG), and established the electromechanical simulation model with the help of power system simulation software DIgSILENT. Furthermore, two typical vector control methods applied in DFIG-stator flux oriented control and stator voltage oriented control were compared from two aspects which were eigenvalue and dynamic response. It can be concluded that when suffered a large disturbance, the proposed two vector control methods are quite different, and it is necessary to consider more detailed model in system stability analysis. On the contrary, when small disturbance is supposed, the results of two control methods are almost identical, which illustrates strong robustness and small deviation by applying general model.
由于风电渗透率高,在电力系统规划中,由于商业秘密,难以获取待安装风力发电机的详细模型。本文讨论了并网双馈风力发电机(DFIG)的数学模型和典型控制策略,并借助电力系统仿真软件DIgSILENT建立了其机电仿真模型。此外,从特征值和动态响应两个方面对dfig中两种典型的矢量控制方法——定子定向磁链控制和定子定向电压控制进行了比较。结果表明,当系统受到较大扰动时,所提出的两种矢量控制方法存在较大差异,在系统稳定性分析中需要考虑更详细的模型。相反,当假设扰动较小时,两种控制方法的结果几乎相同,说明采用一般模型具有较强的鲁棒性和较小的偏差。
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引用次数: 3
期刊
2013 IEEE International Conference of IEEE Region 10 (TENCON 2013)
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