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	1. Study on the Resonant Instability of LCL-TYPE Photovoltaic Farms
	RAN Lize,WANG Jianze
	Dynamic and Electronic Engineering 01 June 2020
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (2307K B)

	Abstract:For the grid side current fed LCL inverter based photovoltaic farms, the mechanism of high-frequency resonance is revealed in this paper: the photovoltaic power station is equal to the circuit in which the resistance is connected in series with the capacitor in a certain frequency region, and it will be possible to construct an equivalent RLC resonant circuit with inductive grid impedance to produce an unstable or weak damping circuit resonance, represented as a high frequency resonant component emerging in the grid side current of LCL inverter. In addition, this paper theoretically verifies the RLC equivalent circuit and analyzes its excitation conditions. Furtherly, the influence of the control function of the LCL inverter on the damping characteristics of the equivalent resonant circuit is analyzed. Finally, the correctness of the analysis is verified by simulation experiments.
	TO cite this article:RAN Lize,WANG Jianze. Study on the Resonant Instability of LCL-TYPE Photovoltaic Farms[OL].[ 1 June 2020] http://en.paper.edu.cn/en_releasepaper/content/4752227


	2. Research on Control Strategy of SCESS-DFIG Grid-side Converter Based on Power-Energy Balance
	Long Haotian,Sun Dongyang,Sun Li
	Dynamic and Electronic Engineering 16 April 2020
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (1067K B)

	Abstract:In this paper, the problem of DC bus capacitance voltage fluctuation caused by multiple converters is studied. The main function of super capacitor energy storage device and DC-DC converter is to provide inertia response power, and its power characteristic is step load. Due to changes in the DC load characteristics of the gird side converter, the balance and stability of the original system will also change. Because the complex topology and system composition of wind storage integrated doubly fed wind turbine, the conventional control strategy can not be used to improve the dynamic response speed. Therefore, this paper designs a control strategy which is suitable for the rapid recovery of DC bus capacitance voltage of wind storage integrated doubly fed wind turbine. The theory proposed in this paper is verified by simulation model and experiment.
	TO cite this article:Long Haotian,Sun Dongyang,Sun Li. Research on Control Strategy of SCESS-DFIG Grid-side Converter Based on Power-Energy Balance[OL].[16 April 2020] http://en.paper.edu.cn/en_releasepaper/content/4751504


	3. A Hybrid Channel Allocation Method for Power Line Communication
	ZOU Deqin,LIU Xiaosheng
	Dynamic and Electronic Engineering 26 March 2018
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (491K B)

	Abstract:Power line communication uses the power line of power system as a communication medium, so its convenience is unparalleled. Meanwhile, it is considered to be one of the best communication technologies in smart grid. This technology must be more and more widely used in the future. However, the whole network of PLC shares one channel, leading to shortage of channel resources. The time variation of PLC system also contributes to reduce channel utilization. In this paper, a hybrid channel allocation method based on PRIME will be proposed. It combines the strength of TDMA and CSMA/CA, which can significantly avoid collision, increase throughput and decrease transmission delay. It is emphasized on TDMA, and CSMA/CA is auxiliary. The idea of time-sharing transmission is used in the method. The results of simulation will show that the method is feasible and effective. The method is of great significance to improve overall performance of PLC.
	TO cite this article:ZOU Deqin,LIU Xiaosheng. A Hybrid Channel Allocation Method for Power Line Communication[OL].[26 March 2018] http://en.paper.edu.cn/en_releasepaper/content/4743967


	4. Transient Stability Assessment Using Individual Machine Equal Area Criterion PART II: Stability Margin
	WANG Songyan,YU Jilai,ZHANG Wei
	Dynamic and Electronic Engineering 10 July 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:In the second part of this two-paper series, the stability margin of a critical machine and that of the system are first proposed, and then the concept of non-global stability margin is illustrated. Based on the crucial statuses of the leading unstable critical machine and the most severely disturbed critical machine, the critical stability of the system from the perspective of an individual machine is analyzed. In the end of this paper, comparisons between the proposed method and classic global methods are demonstrated.
	TO cite this article:WANG Songyan,YU Jilai,ZHANG Wei. Transient Stability Assessment Using Individual Machine Equal Area Criterion PART II: Stability Margin[OL].[10 July 2017] http://en.paper.edu.cn/en_releasepaper/content/4738528


	5. Power System Transient Stability Assessment Using Couple Machines Method
	WANG Songyan,YU Jilai,ZHANG Wei
	Dynamic and Electronic Engineering 07 July 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:Analyzing the stability of the power system by using a few machines is promising for transient stability assessment. A hybrid direct-time-domain method that is fully based on the thinking of partial energy function is proposed in this paper. During post-fault period, a pair of machines with high rotor speed difference is defined as couple machines, and the stability analysis of the system is transformed into that of several pairs of couple machines. Based on the prediction of power-angle curve of couple machines within a sampling window after fault clearing, the proposed method avoids the definition of Center of Inertia (COI) and it can also evaluate the stability margin of the couple machines by using the predicted power-angle curve. Simulation results demonstrate its effectiveness in transient stability assessment.
	TO cite this article:WANG Songyan,YU Jilai,ZHANG Wei. Power System Transient Stability Assessment Using Couple Machines Method[OL].[ 7 July 2017] http://en.paper.edu.cn/en_releasepaper/content/4738531


	6. Transient Stability Assessment Using Individual Machine Equal Area Criterion PART I: Unity Principle
	Wang Songyan,Yu Jilai,Zhang Wei
	Dynamic and Electronic Engineering 07 July 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:Analyzing system trajectory from the perspective of individual machines provides a non-global angle to analyze the transient stability of power systems. This two-paper series propose a direct-time-domain method that is based on the individual-machine equal area criterion. In the first paper, by examining the mapping between the trajectory and power-vs-angle curve of an individual machine, the stability property to characterize a critical machine is clarified. The mapping between the system trajectory and individual-machine equal area criterion is established. Furthermore, a unity principle between the individual-machine stability and system stability is proposed. It is proved that the instability of the system can be confirmed by finding any one unstable critical machine, thence, the transient stability of a multimachine system can be monitored non-globally in online transient stability assessment.
	TO cite this article:Wang Songyan,Yu Jilai,Zhang Wei. Transient Stability Assessment Using Individual Machine Equal Area Criterion PART I: Unity Principle[OL].[ 7 July 2017] http://en.paper.edu.cn/en_releasepaper/content/4738525


	7. Stability and Control Analysis of Doubly Fed Induction Generator Wind Turbine System
	Ghulam Sarwar Kaloi,WANG Jie,MI Xiao,Mazhar H Baloch,Sohaib Tahir
	Dynamic and Electronic Engineering 31 May 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:As wind energy production increases, reliability and fault-tolerant operation capability of wind energy systems are becoming more important. The dynamic system becomes unstable due to uncertainty of wind speed circumstances. Therefore, a complete dynamic wind-generator modeling is carried out through the field oriented techniques, which plays a significant role in power system stability and control. In order to get the nonlinear model of DFIG, the grid system in the dq-synchronous reference frame is connected with DFIG based wind turbine in this paper. In this article, the Proportional integrated controller has proposed to reduce the oscillation of DFIG and stabilize the wind turbine system. The obtained results indicated that applying this approach could significantly improve DFIG performance under transient faults circumstances, also oscillations on the produced active power, rotor speed and stator current magnitude were significantly mitigated.
	TO cite this article:Ghulam Sarwar Kaloi,WANG Jie,MI Xiao, et al. Stability and Control Analysis of Doubly Fed Induction Generator Wind Turbine System[OL].[31 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4734485


	8. Analysis of operating characteristics for High-speed Railway Electric Motor Train Units under different operating conditions
	Wang Mengyao,Zhou Suquan
	Dynamic and Electronic Engineering 11 May 2017
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	Abstract:The Electric Motor Train Units (EMU) load is the main load of the power traction system for high-speed railway, so the accuracy of line characteristic description has an important influence on establishing traction load model. This article designed the logical control strategy for traction drive system and set up a complete digital simulation model of the traction drive system for CRH2 EMU, and then analyzed the traction and braking characteristics under different operating conditions, for example, ideal operation, voltage fluctuation of power supply system and different line factors such as slopes, curves and tunnels. Simulation results show that the designed model is effective and accurate.
	TO cite this article:Wang Mengyao,Zhou Suquan. Analysis of operating characteristics for High-speed Railway Electric Motor Train Units under different operating conditions[OL].[11 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4731666


	9. Power Compensation of a Induction Generator for Variable Speed Wind Energy System
	Mazhar H. Baloch,WANG Jie,ZHANG Dan,Ghulam Sarwar Kaloi,Sohaib Tahir
	Dynamic and Electronic Engineering 10 May 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:In this paper authors demonstrates the controller design and modeling of wind energy system based on 3-phase squirrel cage induction generator (SCIG) at variable speed (VS). Basically, static compenstaor is used to compensate and regulates the dynamic active and reactive power components through Simulink software Matlab. Moreover, from the simulation outcomes, the proposed controller response is quite adequate regarding quick recovery under various dynamic system disturbnaces.
	TO cite this article:Mazhar H. Baloch,WANG Jie,ZHANG Dan, et al. Power Compensation of a Induction Generator for Variable Speed Wind Energy System[OL].[10 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4731854

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