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TENCON 2013 - 2013 IEEE Region 10 Conference (31194)

Date 22-25 Oct. 2013

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Displaying Results 1 - 25 of 377
  • Acknowledgement

    Page(s): 1
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  • Author index

    Page(s): 1 - 33
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  • [Back cover]

    Page(s): 1
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  • Technical program committee

    Page(s): 1 - 2
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  • Conference proceedings [program]

    Page(s): 1 - 189
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  • [Front cover]

    Page(s): c1
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  • Keynote speakers

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1017 KB)  

    These keynote speeches discuss the following: Multi-scale Robotics; Subspace-based speech enhancement via diagonal and triangular matrix decompositions; and DC Grid and Key Technologies for future Smart Grid development. View full abstract»

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  • Welcome from the conference co-chair

    Page(s): 1 - 2
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  • A novel algorithm applied in the transient saturation of current transformer

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (497 KB) |  | HTML iconHTML  

    Serious distortion in the secondary current is caused by the transient saturation of the current transformer (CT). Operation performance of relay protection will be influenced severely. An improved Prony's algorithm that can be applied in relay protection for anti-saturation is presented in this paper. In the improved Prony's algorithm, characteristic roots corresponding to 50Hz are preset to improve the calculation accuracy in short time window. Then, in order to reduce the calculation amount, singular value decomposition (SVD) is used to determine the valid order of the signal, and reasonable sampling rate division is adopted with the determined valid order. In use of the unsaturated segment of the CT's distorted secondary current, the improved Prony's algorithm can obtain effective information of the fault current in a relatively short time window. Calculation results of the experiment data proved the validity of the improved Prony's algorithm. View full abstract»

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  • An improvement on the Euler number computing algorithm used in MATLAB

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (447 KB) |  | HTML iconHTML  

    Computation of the Euler number of a binary image is often necessary in image matching, image database retrieval, image analysis, pattern recognition, and computer vision. This paper proposes an improvement on the Euler number computing algorithm used in the famous image processing tool MATLAB. By use of the information obtained during processing the previous pixel, the number of times of checking the neighbor pixels for processing a pixel decrease from 4 to 2. Our method is very simple in principle, and easily implemented. The experimental results demonstrated that our method outperforms significantly conventional Euler number computing algorithms. View full abstract»

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  • A low switching frequency voltage balancing strategy of modular multilevel converter

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (766 KB) |  | HTML iconHTML  

    The application of modular multilevel converter (MMC) to High Voltage Direct Current projects has to consider voltage balancing of the multiple floating capacitors. The common voltage balancing strategy, which based on the nearest level modulation (NLM) method, benefits from satisfied voltage balancing, but draws back the performance by its high switching frequency and high switching losses. This paper proposes a novel low switching frequency (NLSF) strategy to reduce the switching frequency by using the switching state of submodules (SMs) on the basis of good voltage balancing. A detailed 21-level back to back MMC-HVDC model has been built in PSCAD/EMTDC for demonstration. The simulation results show acceptable voltage balancing with dramatic reduction of the switching frequency by 61% in contrast to the common voltage balancing strategy. View full abstract»

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  • Control strategies of MMC-HVDC connected to passive networks

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (889 KB) |  | HTML iconHTML  

    This paper introduces the structure and operational mechanism of Modular Multilevel Converter-High Voltage Direct Current (MMC-HVDC) and the mathematical model for the MMC-HVDC system in d-q synchronous reference frame is developed. When supplying power to passive networks, the MMC-HVDC controller at the passive network side, which contains a novel inner fast current loop and an outer voltage loop, is designed. The MMC-HVDC connected to passive network simulation model is set up in PSCAD/EMTDC. Simulation results, in the case of various operation conditions, verify that the designed control strategy is effective. View full abstract»

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  • Development of a rectenna for batteryless electronic paper

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (589 KB) |  | HTML iconHTML  

    This paper describes the design of a rectenna for batteryless electronic paper. The rectenna is composed of a one-sided directional flexible antenna and a booster rectifying circuit that is composed of a series resonant circuit and a Cockcroft-Walton circuit. The proposed one-sided directional flexible antenna has a bottom floating metal layer that enables one-sided radiation. The booster rectifying circuit has an output of 3.5 V DC for an input of 200 mV and a 50-Ω power source at 920 MHz. View full abstract»

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  • Measurement of harmonics in different sectors on 11 kV distribution networks

    Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (577 KB) |  | HTML iconHTML  

    The power quality issues nowadays subjected to the distribution network is the most concern due to employing power electronics and control equipment in the residential, commercial, industry and a grid connected solar plant. This paper presents the practical measurement at seven different locations of 11 kV distribution network in Brunei Darussalam. From the measurements, it is found that the individual harmonic voltage distortion (%) and total harmonic distortion (%) are below the IEEE 519-1992 standard. In addition, the current and voltage THD (%) of the neutral phase are higher than the IEEE 519-1992 standard. View full abstract»

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  • Development of dual band digitally controlled oscillator using Fibonacci sequence in 0.18 um CMOS process

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (754 KB) |  | HTML iconHTML  

    This paper presents a digitally controlled oscillator (DCO) in inductor-capacitor (LC) topology with dual -band and fine frequency tuning steps. Using special Fibonacci sequence method and additional capacitor in the capacitor bank, this DCO operates two differential frequency bands and achieves finer tuning range than that of a conventional binary sequence DCO. The proposed circuit is implemented in 0.18 um CMOS technology and tested. It has a high-band frequency of 4.01-4.54 GHz and low-band frequency of 3.41-3.74 GHz. The measured phase noise is -119.3 and -104.5 (dBc/Hz at 1MHz offset) at carrier frequency at 4.54 GHz and 3.41 GHz. View full abstract»

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  • Numerical modeling of reduction in surface-related lags and current slump in GaAs FETs

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (625 KB) |  | HTML iconHTML  

    We perform a two-dimensional transient analysis of field-plate GaAs MESFETs in which surface states are considered. Quasi-pulsed current-voltage curves are derived from the transient characteristics. It is shown that drain lag and current slump due to surface states are reduced by introducing a field plate because fixed potential at the field plate leads to reducing trapping effects by the surface states. Dependence of lag phenomena and current slump on field-plate length and SiO2 passivation layer thickness is also studied, indicating that the lags and current slump can be completely removed in some cases. View full abstract»

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  • Error calibration of three axis magnetometer based on Global Artificial Fish Swarm Algorithm

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (598 KB) |  | HTML iconHTML  

    The Global Artificial Fish Swarm Algorithm (GAFSA) is proposed to calibrate the three-axis magnetometer, taking account of both internal sensor errors and external magnetic field interferences in this paper. A series of simulations and field experiments have been done and the results demonstrate that GAFSA-based calibration method can significantly improve the measurement accuracy of three-axis magnetometer. It also has better robustness and needs less priori knowledge compared to the Particle Swarm Optimization algorithm (PSO) and Nonlinear Least Squares method (NLS). View full abstract»

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  • Classification improvement of P300 response based auditory spatial speller brain-computer interface paradigm

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1321 KB) |  | HTML iconHTML  

    The aim of the presented study is to provide a comprehensive test of the EEG evoked response potential (ERP) feature selection techniques for the spatial auditory BCI-speller paradigm, which creates a novel communication option for paralyzed subjects or body-able individuals requiring a direct brain-computer interfacing application. For rigor, the study is conducted with 16 BCI-naive healthy subjects in an experimental setup based on five Japanese hiragana characters in an offline processing mode. In our previous studies the spatial auditory stimuli related P300 responses resulted with encouragingly separable target vs. non-target latencies in averaged responses, yet that finding was not well reproduced in the online BCI single trial based settings. We present the case study indicating that the auditory spatial unimodal paradigm classification accuracy can be enhanced with an AUC based feature selection approach, as far as BCI-naive healthy subjects are concerned. View full abstract»

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  • Control of composite energy storage system in wind and PV hybrid microgrid

    Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (730 KB) |  | HTML iconHTML  

    Energy storage system is necessary to maintain steady operation of the micro-grid and decrease its influence on the distribution grid. This paper mainly presents the research on the composite energy storage system in a wind and PV hybrid micro-grid. The energy storage system is composed of a battery and a super-capacitor, which combines advantages of both sides. The battery is supposed to compensate the low-frequency part of the micro-grid net load power and the super-capacitor for the high frequency part. A micro-grid model including a wind turbine, a PV cell, loads and composite energy storage system is built with the simulation tool DIgSILENT/PowerFactory and related simulation is carried out. Simulation results confirm that the designed composite energy storage system is applicable and effective for the Micro-grid. View full abstract»

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  • Spectral correlation function of basic analog and digital modulated signals

    Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (460 KB) |  | HTML iconHTML  

    Spectral correlation function (SCF) is a powerful tool to study cyclostationary signals. It can be used to analyze and extract information from modulated signals in noise according to their cyclostationarity. In this paper we investigate SCF features of several basic modulated signals from point view of modulation recognition and parameter estimation. SCFs of modulated signals are given according to their definitions, then their similarity and differences are compared by 3D diagrams, contours, and specific profiles. Periodicity in time domain will lead to peaks in SCF figure whose locations indicate carrier frequency and baud rate. Distributions of SCFs in dual frequency plane are sources to extract features for recognize modulation. Several examples are given to illustrate the value of SCF and conclusion of this paper. View full abstract»

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  • Analysis and improvement of relay protection for photovoltaic power station connected to grid

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (529 KB) |  | HTML iconHTML  

    This paper discusses transient fault current characteristics of photovoltaic system with the help of photovoltaic power system simulation model built in the PSCAD/EMTDC. Then analyze the characteristics and problems of typically existing relay protection configuration scheme for photovoltaic power station and its outgoing lines, and puts forward corresponding improvement measures. View full abstract»

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  • A new way to break through the limitation of CS-layer doping on the breakdown voltage of CSTBT: The superjunction solution

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (599 KB) |  | HTML iconHTML  

    A novel high performance carrier stored trench transistor (CSTBT) with a superjunction structure (SJ-CSTBT) proposed. It breaks through the limitation of carrier stored (CS) layer on the IGBT breakdown voltage Without CS-layer doping concentration limitation, the proposed SJ-CSTBT has better performances on both Vce(sat) and breakdown voltage (BV) than the conventional CSTBT(C-CSTBT). While the p-pillars collect the plasma deep from the anode side, thus its turn-off speed is significantly enhanced and turn-off loss (Eoff) is reduced. The static and dynamic performances are simulated by 2D numerical simulation. The simulation results show that the SJ-CSTBT exhibits a breakdown voltage that is raised by 400 V, and the on-state voltage is reduced by 0.4 V. At the same time, the turn-off loss is decreased by about 50%. Even when the CS-layer doping is above 4e16 cm-3, the BV of the proposed device structure is higher than 1500V while the C-CSTBT is lower than 200V. View full abstract»

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  • Wireless power transmission circuit on a small planar wide-band antenna

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1101 KB) |  | HTML iconHTML  

    This paper presents the design of wireless power transmission circuit on a small planar wide-band antenna. The proposed rectifying circuit consists of a microstrip line, a Schottky detector diode and a capacitor. Our proposed rectifying circuit can work at 2.45 GHz, 3.8 GHz and 5.8 GHz, namely, multiband operation, and circuit size is 56 mm × 43 mm × 1.6 mm. The proposed small planar wide-band antenna has a maximum gain of 1.26 dBi at 2.5 GHz, 0.37 dBi at 3.8 GHz and 3.32 dBi at 5.8 GHz. The maximum conversion efficiencies of this circuit achieved at free space are 26.8%, 29% and 43.3% at 2.5, 3.5 and 5.8 GHz with load resistances of 2000 Ω, 510 Ω, 1300 Ω and 0 dBm input power level. View full abstract»

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  • Single-phase-to-ground fault detection in wind farm collector line using transient phase current criterion

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (644 KB) |  | HTML iconHTML  

    The wind farm collector grid is normally a neutral ineffectively grounded network. Because of the increasingly sophisticated control system and relatively short collector lines of modern wind farms, the current amplitude variation during single-phase-to-ground fault in collector line becomes extremely slight, which may lead to the failure of conventional feeder relays and result in consequential damages. It is thus necessary to take the unique features of wind farms into consideration in detecting single-phase-to-ground fault. Based on detailed analysis of the amplitude characteristics of transient current in the faulted network, the paper provides a novel single-phase-to-ground fault detection method vis-à-vis the present requirements. This method firstly calculates the ratio of the fault component of faulted phase current to that of healthy phase current, aiming at determining the state of the line, namely healthy, faulted or “likely faulted”. If considered as likely faulted, the state of the line will be judged further by recalculating the ratio within the dominant transient frequency band, where the healthy phase transient current is most centralized. The algorithm provides a new approach of capturing adaptively the dominant transient frequency band based on amplitude-frequency analysis. Simulation results on PSCAD/EMTDC prove this algorithm effective and reliable in wind farm collector line single-phase-to-ground fault detection considering various fault conditions. View full abstract»

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  • Investigation on KPI for self-healing smart distribution system operation cockpit

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (491 KB) |  | HTML iconHTML  

    As society and economic rely highly on power supply. The self-healing smart distribution system is the ideal solution to solve the conflicts between society requirement and development of power grid. In such system, there are a lot of distributed energy resources (DER), such as new energy resources (wind turbine, photovoltaic, storage device) and small client site generators, which play important roles by enhancing client site reliability, deferring property investment. However, as more information bursts into control center, the work for operators turns out complex. The conceptual operation cockpit which origins from aerospace is raised to help better understand the system running level and make effectively operational decision. In this article, we investigate on the key performance indicators (KPI) for self-healing systems and operation cockpit based on balanced scorecard (BSC). With the KPI system, operators can obtain the self-healing and smart distribution system performance and situation from a higher, system and business prospective, and they can get better understand and operational decision support. The work in this article is useful for evaluation of self-healing smart distribution and can direct the application of operation cockpit. View full abstract»

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