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	1. Fault Line Selection Based on Improved Grey Relation Analysis for Small Current Grounding System
	XIN Jian,WANG Chonglin,WANG Yangyang
	Dynamic and Electronic Engineering 10 June 2011
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	Abstract:Based on the analysis of various existing methods of fault line selection for small current grounding system and the characteristics of zero-sequence transient current in small current grounding system, a novel fault line selection method based on improved grey relation analysis is proposed. The method utilizes the zero-sequence current relation degree of power lines. Besides, an improved algorithm is proposed to enlarge the difference of relation degree of fault line and normal lines. The simulation results using PSCAD show that the method proposed can be applied to any distribution system with different grounding patterns and has large difference between fault line and normal lines. So the method has high accuracy and high ability of anti-disturbance.
	TO cite this article:XIN Jian,WANG Chonglin,WANG Yangyang. Fault Line Selection Based on Improved Grey Relation Analysis for Small Current Grounding System[OL].[10 June 2011] http://en.paper.edu.cn/en_releasepaper/content/4432083


	2. Fault Model of Flux-Switching Permanent Machine under Stator Winding Shorted Turn
	ZHU Xiaojun,ZHOU Jianhua
	Dynamic and Electronic Engineering 11 May 2011
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	Abstract:To analysis influences under various fault conditions, a fault model of Flux-Switching Permanent Machine (FSPM) under stator winding shorted turn which can be used for a performance assessment of a diagnostic algorithm is presented. For fault conditions of FSPM, turn-to-turn fault and phase-to-phase fault in stator winding are considered in this paper. Even though the conventional d-q coordinate system can be used to construct the model of FSPM, but d - q coordinate system will have a great error under faults. To overcome this limitation, a fault model of FSPM is derived using multi-loop theory. Inductor parameters are obtained by finite element analysis. The accurate fault model provided in this paper lays the foundation for fault diagnosis.
	TO cite this article:ZHU Xiaojun,ZHOU Jianhua. Fault Model of Flux-Switching Permanent Machine under Stator Winding Shorted Turn[OL].[11 May 2011] http://en.paper.edu.cn/en_releasepaper/content/4426774

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	3. A Linear Doubly Salient Permanent Magnet Motor with Modular and Complementary Structure
	Cao Ruiwu,Cheng Ming,Hua Wei,Zhao Wenxiang
	Dynamic and Electronic Engineering 17 March 2011
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	Abstract:A linear doubly salient permanent magnet (LDSPM) motor is particularly suitable for long stator applications due to its simple and low cost stator, which consists of only iron. This paper proposes a novel LDSPM motor with complementary and modular structure. The key of this structure is that the primary mover are composed of two modules whose positions are mutually four and one half of the stator pole pitch apart and there is a flux barrier between them. Hence, the back electromotive force (EMF) waveform and cogging force of the two modules have 180 electrical degree differences. This results in the total cogging force being cancelled and the back-EMF of each phase becoming symmetrical. For fair comparison, an existing linear LDSPM motor is designed based on the same electromagnetic parameters and compared by the means of finite element analysis (FEA). The results reveal that the proposed LDSPM motor can offer symmetrical back-EMF waveforms, smaller cogging force, lower force ripple and higher magnet utilization factor than the existing LDSPM.
	TO cite this article:Cao Ruiwu,Cheng Ming,Hua Wei, et al. A Linear Doubly Salient Permanent Magnet Motor with Modular and Complementary Structure[J].


	4. Synthesis of Antenna Arrays under Uncertain Conditions using a PSO Based Algorithm
	YANG Shiyou,BAI Yanan
	Dynamic and Electronic Engineering 21 February 2011
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	Abstract:The general-purpose Particle Swarm Optimization (PSO) method is enriched to enable it to search for both global and robust optimal solutions of a synthesis problem in antenna engineering. In order to reduce the huge computational burden of the expected fitness evaluations, a methodology to assign expected fitness value or robust criterion only to the promising solutions is proposed. Moreover, a new distance-weighted formula to determine the expected fitness of the promising solutions is also introduced. To find both global and robust optimal solutions in a single run, a novel idea is proposed to guide the search intelligently. Finally, one example is studied and their numerical results are reported to demonstrate the effectiveness and advantages of the proposed algorithm, as well as the necessity to conduct robust optimal designs in antenna engineering.
	TO cite this article:YANG Shiyou,BAI Yanan. Synthesis of Antenna Arrays under Uncertain Conditions using a PSO Based Algorithm[OL].[21 February 2011] http://en.paper.edu.cn/en_releasepaper/content/4411014


	5. Robust Optimization using Cross Entropy Methods
	YANG Shiyou,BAI Yanan
	Dynamic and Electronic Engineering 15 February 2011
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	Abstract:To address the performance degradations of optimal designs arising from uncertainties using traditional concepts and methodologies, a robust oriented cross entropy method is proposed. To efficiently compute the robust performances, the normal distribution function is used as the probability density function, and a methodology for evaluating and assigning robust performance to promising solutions is proposed. A statistical model is introduced for the constraint functions to enhance the quality of the final design. To find the global and robust optimal solutions simultaneously in a single run, the original objective rather than the robust performance parameters is used for selecting the elite solutions. Two examples are reported to validate the proposed algorithm.
	TO cite this article:YANG Shiyou,BAI Yanan. Robust Optimization using Cross Entropy Methods[OL].[15 February 2011] http://en.paper.edu.cn/en_releasepaper/content/4410888


	6. A review of power system harmonic detection methods
	Zhao BingJie,Wu XiaoJie,Fu Xiao
	Dynamic and Electronic Engineering 05 May 2010
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	Abstract:The most commonly used harmonic detection methods are presented in this paper. Four kinds of detection method including FFT detecting technique based on frequency domain analysis, wavelet transformation detecting, the current detection based on instantaneous reactive power theory and the adaptive control detecting. Comparative analysis are listed according to their detection precision、response speed and model complexity.
	TO cite this article:Zhao BingJie,Wu XiaoJie,Fu Xiao. A review of power system harmonic detection methods[OL].[ 5 May 2010] http://en.paper.edu.cn/en_releasepaper/content/357972


	7. Predicted Current Model for Dual-Winding Switched Reluctance Generators
	Cao Xin,Deng Zhiquan,Yao Tian,Zhou Qin,Zhuang Zheng
	Dynamic and Electronic Engineering 08 January 2010
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	Abstract:A generating operation for dual-winding switched reluctance generators (DWSRGs) is proposed. Firstly, the generating principle and prototype structure are demonstrated. After that, power converters and excitation strategy are illustrated for the proposed generators. Secondly, the inductance profiles are derived based on the virtual-work method. And the voltage equations of the two windings are also built for the current analysis. Finally, the current expressions for different phases are deduced. The dynamic analysis and experimental results are also obtained to be compared with the calculating results. It is shown that they are in good agreement. After that, the current model is used to depict the relationship between flux-linkage and current. Then the energy conversion is illustrated. The proposed current models can also be employed for machine and power converter design.
	TO cite this article:Cao Xin,Deng Zhiquan,Yao Tian, et al. Predicted Current Model for Dual-Winding Switched Reluctance Generators[OL].[ 8 January 2010] http://en.paper.edu.cn/en_releasepaper/content/38696


	8. Experimental Investigation of Anode Activities in High-Current Vacuum Arcs
	Yang Dingge ,Wang Lijun,Jia Shenli,Wang Liuhuo,Liu Ke,Li Yaoi,Shi Zongqian
	Dynamic and Electronic Engineering 16 November 2009
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	Abstract:It is well known that the melting of electrodes (mainly anode melting) in vacuum arc can increase the metal vapor density around current zero and even lead to interruption failure. In order to clarify the anode activities and their influence on arc appearance and interruption capacity, series experiments of cup-shaped axial magnetic field copper electrodes were conducted. Obvious anode melting was detected, the liquid copper flowed on the contact plate of anode and formed a clockwise swirl flow. The appearance of anode melting is correlated to the transition of arc mode. The melting of anode was severer than cathode and was influenced by the distribution of cathode spots. The material lost of anode was mainly in form of liquid droplets sputtering out of gap or flow into the cup of electrode, the copper vapor evaporated into arc column only accounted for a few portions.
	TO cite this article:Yang Dingge ,Wang Lijun,Jia Shenli, et al. Experimental Investigation of Anode Activities in High-Current Vacuum Arcs[OL].[16 November 2009] http://en.paper.edu.cn/en_releasepaper/content/36714


	9. Implicit Functional testing of switched current filter based on fault signatures
	Long Ying ,He Yigang
	Dynamic and Electronic Engineering 17 September 2009
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	Abstract:This paper aims at defining an efficient test strategy for switched-current circuit testing. By checking the constructed signatures (impulse response samples) against the derived tolerance ranges, we can infer the correctness of the device under test (DUT) without explicitly measuring the original performance parameters. We also describe a technique of mapping the tolerance ranges in the performance space to its associated tolerance ranges in the signature space (We call such a procedure implicit functional testing). In particular, a suitable strategy for the choice of these samples has been devised taking into account their sensitivities to the circuit performance to be checked for. Taking into account the specificity of switched-current circuit, catastrophic and parametric fault model for testing is constituted. A fifth order Butterworth low-pass filter and a sixth order Elliptic band-pass filter have been used as test benches to assess the effectiveness of the proposed technique. Test results demonstrate that a high fault coverage can be achieved with a low cost test equipments.
	TO cite this article:Long Ying ,He Yigang . Implicit Functional testing of switched current filter based on fault signatures[OL].[17 September 2009] http://en.paper.edu.cn/en_releasepaper/content/35249


	10. Numerical simulation of anode activity under action of high-current vacuum arc
	Wang Lijun ,Yang Dingge ,Jia Shenli ,Liu Ke ,Shi Zongqian
	Dynamic and Electronic Engineering 28 April 2009
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	Abstract:Anode activity is critical for success or failure of vacuum interrupters when arc current attains to a certain limiting value. Based on mathematical model of anode activity, anode thermal process under action of high-current arc column is simulated. Simulation results show that for sinusoid current, anode surface temperature firstly increases rapidly, then decreases slower. With the increase of heat flux density to anode, anode surface temperature will be increased. The maximal value of anode surface temperature appears near 7ms moment. Simulation results also are compared with experimental results.
	TO cite this article:Wang Lijun ,Yang Dingge ,Jia Shenli , et al. Numerical simulation of anode activity under action of high-current vacuum arc[OL].[28 April 2009] http://en.paper.edu.cn/en_releasepaper/content/31782

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