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Impedance-based ground fault location for transmission lines 基于阻抗的输电线路接地故障定位
CCECE 2010 Pub Date : 2010-05-02 DOI: 10.1109/CCECE.2010.5575192
Hongling Sun, V. Sood
{"title":"Impedance-based ground fault location for transmission lines","authors":"Hongling Sun, V. Sood","doi":"10.1109/CCECE.2010.5575192","DOIUrl":"https://doi.org/10.1109/CCECE.2010.5575192","url":null,"abstract":"Impedance-based fault location methods are widely used due to their simple mode of operation and relatively low cost. However, their performance suffers from factors such as fault impedance, pre-fault load current, and remote infeed. Although significant improvements have been made by compensating these effects, the presence of unreliable zero-sequence current always presents a challenge to those conventional methods. The algorithm proposed in this paper for a one-terminal fault location method using a new superposition current in conjunction with a reactance method offers significant improvement. Different types of line modeling are represented to show their effects on the fault location estimation. Furthermore, comparative test results of the proposed one-terminal method with conventional two-terminal methods are also presented. The simulations are performed in EMTP-RV and the signal processing is conducted by using MATLAB.","PeriodicalId":325063,"journal":{"name":"CCECE 2010","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122303859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Merger of polarization and spatial diversity by moving a pair of orthogonally polarized dipoles 通过移动一对正交极化偶极子来合并极化和空间分异
CCECE 2010 Pub Date : 2010-05-02 DOI: 10.1109/CCECE.2010.5575204
V. Dehghanian, J. Nielsen, G. Lachapelle
{"title":"Merger of polarization and spatial diversity by moving a pair of orthogonally polarized dipoles","authors":"V. Dehghanian, J. Nielsen, G. Lachapelle","doi":"10.1109/CCECE.2010.5575204","DOIUrl":"https://doi.org/10.1109/CCECE.2010.5575204","url":null,"abstract":"Size and cost considerations of handheld terminals limit the use of antenna array for combating multipath fading in these applications. Recently, a synthetic array based on moving a single antenna was proposed for handheld terminals. This technique however fails to provide enough diversity gain when the channel is spatially correlated. A combination technique based on merging polarization and spatial diversity and motions of a crossed dipole is proposed here. The diversity performance of the crossed dipole synthetic array (XSA) is then compared to that of a single dipole synthetic array. A closed form expression is also derived for calculating the cumulative distribution function of summation of correlated central chi-squared random variables with four degrees of freedom which arises in the XSA performance analysis. Finally, the proposed technique is put into test through an extensive set of measurements.","PeriodicalId":325063,"journal":{"name":"CCECE 2010","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127357842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Halftone control method in white light leds by using an embedded remote controller with ZigBee communication 白光led的半色调控制方法，利用嵌入式遥控器与ZigBee通信
CCECE 2010 Pub Date : 2010-05-02 DOI: 10.1109/CCECE.2010.5575227
Chi-Huang Hung, Ying-Wen Bai
{"title":"Halftone control method in white light leds by using an embedded remote controller with ZigBee communication","authors":"Chi-Huang Hung, Ying-Wen Bai","doi":"10.1109/CCECE.2010.5575227","DOIUrl":"https://doi.org/10.1109/CCECE.2010.5575227","url":null,"abstract":"In this paper we design an automatic light controller which consists of two parts: an LED array with a control unit and an embedded remote controller with ZigBee communication. The LED array includes both an LED array and a transmission controlled module. We use the halftone method to transform different LED array patterns into gray patterns and use those different halftone patterns to control the LED on/off which can adjust the LED light brightness, just like using PWM. We use ZigBee technology to send a brightness control signal as a distance measurement by means of an embedded remote controller. Visual Studio is used as the development software for our design of the graphic interface to provide a user-friendly operation.","PeriodicalId":325063,"journal":{"name":"CCECE 2010","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133525174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
A DTN wireless sensor network for wildlife habitat monitoring 一种用于野生动物栖息地监测的DTN无线传感器网络
CCECE 2010 Pub Date : 2010-05-02 DOI: 10.1109/CCECE.2010.5575142
Alejandro Tovar, T. Friesen, K. Ferens, B. McLeod
{"title":"A DTN wireless sensor network for wildlife habitat monitoring","authors":"Alejandro Tovar, T. Friesen, K. Ferens, B. McLeod","doi":"10.1109/CCECE.2010.5575142","DOIUrl":"https://doi.org/10.1109/CCECE.2010.5575142","url":null,"abstract":"This paper reports on a preliminary study of applying a wireless sensor network using DTN (Delay Tolerant Network) to sample the current status of a certain wildlife mammal with the name of White Tail Deer (Odocoileus virginianus) in the WMU Area 47 Ontario, Canada North of Parry Sound district. System architecture is proposed to obtain the highest monitoring range achievable with the least amount of sensors. With this method we can obtain the status of white tail deer, and detect other kinds of animals as well. The current method for surveying the white tail deer needs to be reviewed in order to obtain a most frequent status report of this important animal. By using DTN we expect to obtain disruption support capabilities in our sensor network. Furthermore, we simulated the wildlife habitat monitoring system on the Planet Lab environment. Our future work will develop sensors, deploy them in the field, and create a DTN network for the monitoring of wildlife habitat.","PeriodicalId":325063,"journal":{"name":"CCECE 2010","volume":"24 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132153097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 44
Impact of maximum power point tracking on grid-connected Photovoltaic system dynamics 最大功率点跟踪对并网光伏系统动力学的影响
CCECE 2010 Pub Date : 2010-05-02 DOI: 10.1109/CCECE.2010.5575228
P. Dash, Mehrdad Kazerani
{"title":"Impact of maximum power point tracking on grid-connected Photovoltaic system dynamics","authors":"P. Dash, Mehrdad Kazerani","doi":"10.1109/CCECE.2010.5575228","DOIUrl":"https://doi.org/10.1109/CCECE.2010.5575228","url":null,"abstract":"This paper studies the performance of a single-stage, three-phase Photovoltaic (PV) system that is connected to a distribution network. The control is based on an outer voltage control loop and an inner current regulation loop. A Maximum Power Point Tracker (MPPT) based on Perturb & Observe (P&O) method is interfaced to outer voltage control loop. The outer voltage control loop is based on feed-forward compensation strategy to make the PV system dynamics immune to the PV array nonlinear characteristics. Through simulation and mathematical analysis, it has been shown in previous research work that in the absence of feed-forward compensation change in the operating condition causes oscillation with weather condition unchanged. This paper shows through simulation that incorporation of MPPT in the PV system under steady-state renders an optimal operating point which results in a stable operation irrespective of weather condition and without feed-forward compensation. Moreover, an eigen value analysis is carried out both with the MPPT and without the MPPT to verify the simulated results.","PeriodicalId":325063,"journal":{"name":"CCECE 2010","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133457512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling of planar transformer parasitics using design of experiment methodology 基于实验设计的平面变压器寄生模型
CCECE 2010 Pub Date : 2010-05-02 DOI: 10.1109/CCECE.2010.5575138
Samuel R. Cove, M. Ordonez, J. Quaicoe
{"title":"Modeling of planar transformer parasitics using design of experiment methodology","authors":"Samuel R. Cove, M. Ordonez, J. Quaicoe","doi":"10.1109/CCECE.2010.5575138","DOIUrl":"https://doi.org/10.1109/CCECE.2010.5575138","url":null,"abstract":"Planar transformer parasitics are difficult to model due to the complex winding geometry and their nonlinear and multivariate nature. This paper provides parametric models for planar transformer parasitics based on finite element simulations of a variety of winding design parameters using the Design of Experiments (DoE) methodology. A rotatable Central Composite Design (CCD) is employed based on a full 24 factorial design to obtain equations for the leakage inductance, inter and intra-winding capacitances, resistance, output current, and output voltage. Using only 25 runs, the final results can be used to replace time-intensive finite element simulations for a wide range of planar transformer winding design options. Validation simulations were performed to confirm the accuracy of the model. Results are presented using a planar E18/4/10 core set and can be extended to a variety of core shapes and sizes.","PeriodicalId":325063,"journal":{"name":"CCECE 2010","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132365490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Tri-band CMOS Class-E power amplifier design with phase compensations for polar systems 极性系统相位补偿的三带CMOS e类功率放大器设计
CCECE 2010 Pub Date : 2010-05-02 DOI: 10.1109/CCECE.2010.5575171
C. Lai, W. Tsou, M. Chou, K. Wen
{"title":"Tri-band CMOS Class-E power amplifier design with phase compensations for polar systems","authors":"C. Lai, W. Tsou, M. Chou, K. Wen","doi":"10.1109/CCECE.2010.5575171","DOIUrl":"https://doi.org/10.1109/CCECE.2010.5575171","url":null,"abstract":"A 0.18mm CMOS fully integrated cascode Class-E power amplifier operating in 2.5GHz/3.5GHz/5.2GHz frequency bands for polar transmitters has been proposed. The tri-band amplification is achieved by adaptation of the common-gate transistor size and the matching networks. The phase distortion from supply modulation of the Class-E is compensated by controlling the common-gate transistor gate voltage and a compensative capacitor. Simulation results show that the maximum power-added efficiency (PAE) of 30.4%, drain efficiency of 34% and output power of 18.8dBm from 2.8V supply can be achieved. The phase distortion can be compensated from 34.4° to 3.1° under supply voltage of 0.5V to 2.8V. A system co-simulation has been established for relative constellation error (RCE) evaluation and it reveals that the RCE can be improved from −23.3dB to −31.4dB in 3.5GHz frequency band.","PeriodicalId":325063,"journal":{"name":"CCECE 2010","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133050440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of a custom vector operation API exploiting SIMD intrinsics within Java 设计一个利用Java内部SIMD特性的自定义矢量操作API
CCECE 2010 Pub Date : 2010-05-02 DOI: 10.1109/CCECE.2010.5575190
J. Parri, J. Desmarais, Daniel Shapiro, M. Bolic, V. Groza
{"title":"Design of a custom vector operation API exploiting SIMD intrinsics within Java","authors":"J. Parri, J. Desmarais, Daniel Shapiro, M. Bolic, V. Groza","doi":"10.1109/CCECE.2010.5575190","DOIUrl":"https://doi.org/10.1109/CCECE.2010.5575190","url":null,"abstract":"The use of Single Instruction Multiple Data (SIMD) operations can be instrumental in meeting the needs of high performance computations. Most languages, including C/C++, give a user the power to directly exploit this hardware and inherent parallelism. We have created a retargetable native SIMD library which Java programmers are now able to use to directly access SIMD intrinsics including MMX, SSE1, SSE2 and SSE3 through prescribed Java methods in an API. This API gives users direct control over their high-performance computations instead of solely relying on the SIMD optimizations of the Java Virtual Machine (JVM), or relying on a GPU which must send and receive the data from the CPU. Through the use of this Java API and the included backing library, substantial performance gains can be achieved on large and complex vector operations. We show an example for which the API obtains a 2x to 3x speedup for both small and large data sets as compared to solely relying on the SIMD optimizations in the JVM.","PeriodicalId":325063,"journal":{"name":"CCECE 2010","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115017057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Implementation of an all-analog active reflector 全模拟有源反射器的实现
CCECE 2010 Pub Date : 2010-05-02 DOI: 10.1109/CCECE.2010.5575200
Jean-François Bousquet, S. Magierowski, G. Messier, Zhixing Zhao
{"title":"Implementation of an all-analog active reflector","authors":"Jean-François Bousquet, S. Magierowski, G. Messier, Zhixing Zhao","doi":"10.1109/CCECE.2010.5575200","DOIUrl":"https://doi.org/10.1109/CCECE.2010.5575200","url":null,"abstract":"A 3.65-GHz all-analog wireless reflector acting as a cooperative diversity repeater is built in 0.13-μm CMOS technology and its performance is evaluated. Interfaced with a folded dipole antenna, the circuit can achieve a 23.5-dB gain for a very low power consumption equal to 300 μW.","PeriodicalId":325063,"journal":{"name":"CCECE 2010","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121093933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Prototype design and experimental verification of an electromagnetic actuator for parametric stiffness excitation 电磁作动器参数刚度激励的原型设计与实验验证
CCECE 2010 Pub Date : 2010-05-02 DOI: 10.1109/CCECE.2010.5575174
E. Schmidt, H. Ecker
{"title":"Prototype design and experimental verification of an electromagnetic actuator for parametric stiffness excitation","authors":"E. Schmidt, H. Ecker","doi":"10.1109/CCECE.2010.5575174","DOIUrl":"https://doi.org/10.1109/CCECE.2010.5575174","url":null,"abstract":"Initial design, realization and application of a novel electromagnetic actuator to create a time-harmonic variation of a mechanical stiffness will be discussed. It is known from theoretical studies, that such a time-periodic parameter variation at a non-resonant parametric resonance frequency can improve the damping behaviour of a mechanical system. Thus, a device consisting of a current driven coil positioned between two permanent magnets has been designed and tested. Finite element analyses have been carried out to obtain the mechanical stiffness provided as a function of the coil current excitation. With this novel electromagnetic actuator it is possible to demonstrate the improved damping behaviour of a mechanical two-mass system, when the actuator is operating at or near a certain parametric combination resonance frequency.","PeriodicalId":325063,"journal":{"name":"CCECE 2010","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128774891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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