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	1. Optimal Control of Wind/Storage System Satisfying Ramp Rate Limit in Grid Codes
	WANG Ying,DAI Xianzhong,ZHANG Kaifeng
	Dynamic and Electronic Engineering 08 January 2013
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	Abstract:Wind power ramp rate limit in grid codes must be satisfied when smoothing wind power fluctuations. A methodology is proposed in this paper that can satisfy the ramp rate requirement by using two means, i.e. energy storage system and wind power curtailment. Based on the ultra-short-term wind power prediction, a rolling optimization problem is established to maximize the total profit of wind/storage hybrid system. The proposed method is applied in a case with practical data from an actual wind/storage demonstration project in China and the results show the effectiveness of the method.)
	TO cite this article:WANG Ying,DAI Xianzhong,ZHANG Kaifeng. Optimal Control of Wind/Storage System Satisfying Ramp Rate Limit in Grid Codes[OL].[ 8 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4513310


	2. Design Optimization of Axisymmetric Endwall in Axial Compressor S-Shaped Duct
	Jin Donghai,Zhao Weiguang,Gui Xingmin
	Dynamic and Electronic Engineering 06 January 2013
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	Abstract:This paper presents a numerical investigation on the potential aerodynamic benefits of using endwall contouring in a fairly aggressive duct with six struts based on the platform of the endwall design optimization. The platform was built with Adaptive Genetic Algorithm (AGA), Design of Experiments (DOE), Response Surface Methodology (RSM) based on the Artificial Neural Network (ANN) and a 3D Navier-Stokes solver. Visual analysis method based on DOE was used to define the design space and analyse the impact of the design parameters on the target function (response). Optimization of axisymmetric endwall contouring in the duct has been performed and evaluated. The objective was to minimize the total pressure loss. The optimal duct was found to reduce the hub corner separation and suppress the migration of the low momentum fluid. The axisymmetric endwall contouring was shown to suppress the separation and reduce the net duct loss by 22%.
	TO cite this article:Jin Donghai,Zhao Weiguang,Gui Xingmin. Design Optimization of Axisymmetric Endwall in Axial Compressor S-Shaped Duct[OL].[ 6 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4510584

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	3. Manipulate Interface Thermal Conductance of Metal-Graphene-Substrate Using Graphene Thermal Stability
	ZHAO Weiwei,ZHANG Chunwei,YONG Guoqing,HUANG Peng,BI Kedong,CHEN Yunfei,NI Zhenhua
	Dynamic and Electronic Engineering 05 January 2013
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	Abstract:Graphene defects have played an important role in graphene's electrical, optical and thermal properties. In this work, we measured the interface thermal conductance of Al/graphene with different defect situations/silica using transient thermoreflectance technique. We use the graphene thermal stability of being annealed in different temperatures to manipulate the graphene defects. The transient thermoreflectance technique measurement results suggest that as graphene defects increase, the interface thermal conductance increases as well. The cause of the interface thermal conductance increase might be the graphene disintegration which starts from graphene imperfection rings and the oxygen doping which will enhance the metal-graphene bonding energy.
	TO cite this article:ZHAO Weiwei,ZHANG Chunwei,YONG Guoqing, et al. Manipulate Interface Thermal Conductance of Metal-Graphene-Substrate Using Graphene Thermal Stability[OL].[ 5 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4512357


	4. Internal Fault Diagnosis ofPermanent Magnet Synchronous Generator
	Fang Hongwei
	Dynamic and Electronic Engineering 29 December 2012
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	Abstract:A coupled field-circuit method by taking into account the saturation is proposed in this paper. The stator winding inter-turn short circuit and the rotor eccentricity hybrid fault of permanent magnet synchronous generators (PMSG) is analyzed. The harmonic currents were used in order to investigate this kind of fault in a 7.5 kVA PMSG suitable for low-power wind generation applications. Simulation results have shown that the sideband frequency currents at 25 Hz and 75 Hz, and the 17th and 19th order components of terminal currents can be used as fault detection criteria.
	TO cite this article:Fang Hongwei. Internal Fault Diagnosis ofPermanent Magnet Synchronous Generator[OL].[29 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4510484


	5. Comparison Studies on Access Points of Wind Farms Based on N-k Cascading Risks
	Liu Zhe,Jia Hongjie,Zeng Yuan,Xu Tao
	Dynamic and Electronic Engineering 23 December 2012
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	Abstract:With the accelerating expansion of wind power in China, a rational assessment method of wind farm access points plays an active role in guiding power system planning and operation. The traditional deterministic security analysis method is difficult to take the uncertainty of wind power into account, recently risk analysis method has aroused extensive concern of researchers. The alteration of power flow after outage is used to calculate the severity index of lines in contingency set, which is considered as the selection principle of cascading outage chain in this paper. And N-k cascading risk assessment method considering the uncertainty of wind speed is used to analysis the security of different planning schemes of wind farm access points. At the same time, the risks of energy storage devices integrated on the side of wind farm is also studied. With analyzing the risk level of power system, the methodology for determining reasonable and efficient energy storage configuration is also proposed. Finally, the correctness and effectiveness of the proposed method is validated by a modified IEEE-RTS system.
	TO cite this article:Liu Zhe,Jia Hongjie,Zeng Yuan, et al. Comparison Studies on Access Points of Wind Farms Based on N-k Cascading Risks[OL].[23 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4507970


	6. Dynamic Synchronized Phasor Measurement based on AM-FM Demodulation
	Jin Xianing,Wang Fuping,Wang Zanji
	Dynamic and Electronic Engineering 14 August 2012
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	Abstract:Precise estimation of synchronized phasors in phasor measurement unit (PMU) is significant for system analysis, control and security. Measurement technique under dynamic conditions is addressed in recent researches. Limitations and criteria for dynamic behaviors are proposed in the new issued IEEE Std. C 37.118-2011 for synchrophasor measurements for power system. In this paper, dynamic characteristics of signals are described as non-stationary signals with amplitude and frequency modulations (AM-FM). A new method for estimating synchronized phasor based on AM-FM demodulation by Energy Operator is presented. In order to avoid the effect of noise, low-pass differentiator is employed. Performance of algorithm is evaluated by simulations and analysis of field data. The result illustrate that the algorithm proposed in this paper improves precision of phasor estimation and reduces response time of PMU, which meets the requirement of the current standard even during dynamic behaviors.
	TO cite this article:Jin Xianing,Wang Fuping,Wang Zanji. Dynamic Synchronized Phasor Measurement based on AM-FM Demodulation[OL].[14 August 2012] http://en.paper.edu.cn/en_releasepaper/content/4486928


	7. Design Optimization of a Complementary and Modular Linear Flux-Switching Permanent Magnet Motor for Long Stator Applications
	Cao Ruiwu,Cheng Ming,Hua Wei,Wang Xin,Zhao Wenxiang
	Dynamic and Electronic Engineering 11 June 2012
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	Abstract:This paper investigate the design optimization of a new modular linear flux-switching permanent magnet (MLFSPM) motor with complementary, symmetrical and modular structure and compare its performance with the conventional linear flux-switching permanent magnet (LFSPM). The key of the proposed structure is that each phase armature winding is composed of two coils whose positions are mutually one half of the stator pole pitch and there are flux barrier between the two adjacent "E" models. Hence, the back-EMF waveform of each phase is sinusoidal and the three phase magnet circuits are symmetrical. We first optimize the design and analyze the electromagnetic performance of the proposed MLFSPM motor by means of finite element method (FEM). Then, the structure of the conventional LFSPM motor is also optimized and then compared with the proposed motor based on the same method. The results reveal that the proposed motor has sinusoidal and symmetrical three-phase back-EMF waveforms, smaller cogging force, and smaller force ripple than the existing motors. Moreover, a prototype of the proposed motor is built to validate the study.
	TO cite this article:Cao Ruiwu,Cheng Ming,Hua Wei, et al. Design Optimization of a Complementary and Modular Linear Flux-Switching Permanent Magnet Motor for Long Stator Applications[OL].[11 June 2012] http://en.paper.edu.cn/en_releasepaper/content/4481853


	8. A four-dimension frational order hyperchaotic system derived from Liu-system and its circuit research
	Han Qiang,Sun Lei,Zhu Darui,C X Liu
	Dynamic and Electronic Engineering 09 April 2012
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	Abstract:This paper proposed a novel four-dimensional fractional order hyperchaotic system derived from Liu-System. EWB as well as Matlab simulations show the dynamical behavior of the proposed four-dimensional fractional order hyperchaotic system. Finally, after respectively using EWB and MATLAB, an electronic circuit is designed to realize the novel four-dimensional fractional order hyperchaotic system and get circuit experiment results which are identical to software simulations.
	TO cite this article:Han Qiang,Sun Lei,Zhu Darui, et al. A four-dimension frational order hyperchaotic system derived from Liu-system and its circuit research[OL].[ 9 April 2012] http://en.paper.edu.cn/en_releasepaper/content/4474762


	9. A novel experimental method to evaluate the impact of the volute's asymmetry on the performance of a high pressure ratio turbocharger compressor
	LIN Yun,ZHENG Xinqian,JIN Lei,TAMAKI Hideaki,KAWAKUBO Tomoki
	Dynamic and Electronic Engineering 02 March 2012
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	Abstract:All components of a turbocharger compressor are axisymmetric except for the spiral-shaped, gas-collecting overhung volute. In this paper, a novel experimental method to evaluate the impact of the volute's asymmetry on centrifugal compressor performance is proposed and applied to a high pressure-ratio turbocharger compressor. This method can isolate the impact of the volute's asymmetry on the compressor performance for the first time. Experiments prove the considerable impact of the volute's asymmetry on the compressor performance, especially on the stability and efficiency. The impact of the volute's asymmetry on compressor stability correlates with rotational speed and therefore with pressure ratio; constricting the stable flow range by up to 47 percent and decreasing the maximum efficiency by 4.8 percent at design speed. The results provide evidence to exploit the potential of intrinsic non-axisymmetric flow induced by asymmetric volute to improve the performance of turbocharger compressor with high pressure ratio.
	TO cite this article:LIN Yun,ZHENG Xinqian,JIN Lei, et al. A novel experimental method to evaluate the impact of the volute's asymmetry on the performance of a high pressure ratio turbocharger compressor[OL].[ 2 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4469699


	10. Algorithm and Communication Performance of an Adaptive Protection System for Distribution Line
	LI Zhongwei,XU Lei,CHENG Li,TONG Weiming
	Dynamic and Electronic Engineering 01 March 2012
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	Abstract:To accelerate the adaptive protection's application, an adaptive protection system for distribution line of 35kV or under 35kV is designed in this paper. The system's overall structure is constructed and the distribution line's disturbance area model is erected. The adaptive setting algorithm, realizing strategy of adaptive protection function and a difference filter adding full-wave Morlet complex wavelet amplitude algorithm are presented. The transmission time delay model and performance evaluation indexes of fieldbus are offered. The DeviceNet communication performance of the system's substation level and the periodic communication's transmission time delay of the system's central control center level are analyzed. Results of analysis and simulation indicate that the adaptive protection system can set the protection settings in the central control center, substation control center and adaptive protection device on-line. And it can adapt to the changes of topology structure, operating mode, fault type and line's load of power system. The difference filter adding full-wave Morlet complex wavelet amplitude algorithm can filter the decaying DC component and has better frequency characteristic and stability. The DeviceNet fieldbus and industrial Ethernet communication in the system can satisfy the requirement of real time and reliability of substation automation.
	TO cite this article:LI Zhongwei,XU Lei,CHENG Li, et al. Algorithm and Communication Performance of an Adaptive Protection System for Distribution Line[OL].[ 1 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4466046

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