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1. 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 | |||
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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 |
2. Simulation of Sensorless Control For FSPMLM Based On mover Saliency-Tracking | |||
Gaojun Meng,Minqiang Hu,Mingfei xu | |||
Dynamic and Electronic Engineering 04 December 2015 | |||
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Abstract:This paper researches a sensorless control method of flux-switching permanent linear magnet with high-frequency signal injection on the basis of salient pole verification, through the analysis of FSPMLM structure. A high frequency sinusoidal voltage signal is superimposed into the estimated d-axis, and the mover position can be demodulated after q-axis current is regulated, which is relative to error angle. Ultimately the mover position and speed can be obtained exactly. The paper also contributes to an improved magnetic pole identification based on space vector pulse width modulation for and arbitrary initial position to resolve starting problem of IPMSM. At last, the simulation model of FSPMLM and control system are constructed and all results of simulation demonstrate the accuracy and effectiveness of the presented approach, this method is well suitable for the application. | |||
TO cite this article:Gaojun Meng,Minqiang Hu,Mingfei xu. Simulation of Sensorless Control For FSPMLM Based On mover Saliency-Tracking[OL].[ 4 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4668125 |
3. Frequency Tracking Based on Least Squares Algorithms | |||
GUO Hengdao | |||
Dynamic and Electronic Engineering 16 October 2015 | |||
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Abstract:System stability plays an important role in electric power systems. With the development of electric power system, the scale of the electric grid is now becoming larger and larger, and many renewable energy resources are integrated in the grid. However, at the same time, the stability and safety issues of electric power system are becoming more complicated. Frequency is one of the most critical parameters of the system stability. Obtaining the parameter has been a great challenge for decades. Researchers have provided various kinds of algorithms for frequency tracking. Among them, Least Squares (LS) algorithm is one of the most commonly used algorithm. The paper studies the LS algorithm working on frequency tracking. In order to test the performance of the algorithm, some simulations have been made in MATLAB. | |||
TO cite this article:GUO Hengdao. Frequency Tracking Based on Least Squares Algorithms[OL].[16 October 2015] http://en.paper.edu.cn/en_releasepaper/content/4657589 |
4. Design of Wide-area Damping Controller Considering the Changes of Operating Point | |||
SUO Jianglei,HU Zhijian | |||
Dynamic and Electronic Engineering 26 September 2014 | |||
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Abstract:With regard to the uncertainty of wind power and negative effects to the area-damping of system caused by long-distance transmission of large-scale wind power under high permeability, a design method of wide-area controller is put forward which is applicable to a great change in the operation modes of power system such as a dramatic change of wind speed in wind farms. A model of power system is established using time-delay linear parameters change method and the nonlinear problem is described by the clever use of linear equation. Then the whole parameter change range is meshed and the controllers are designed respectively. Finally the scheduling criteria is formulated by a triangle membership function and the controller weights is also assigned so as to construct a wide-area gain-scheduling controller which can cover the full range of parameter change. The time domain simulation of a test system shows that the proposed method has an ideal effect even a great change has occurred to the operation modes and has stronger robustness compared with the traditional pole assignment method. | |||
TO cite this article:SUO Jianglei,HU Zhijian. Design of Wide-area Damping Controller Considering the Changes of Operating Point[OL].[26 September 2014] http://en.paper.edu.cn/en_releasepaper/content/4611414 |
5. A Comprehensive Integrated Approach for Transmission and Distribution System Long Term Planning | |||
Ding Xiaoying | |||
Dynamic and Electronic Engineering 20 June 2013 | |||
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Abstract:In this paper, a comprehensive integrated long term planning approach for the transmission and distribution systems is proposed. The presented method involves iterative loops between the transmission and distribution system models to ensure the validity of results with respect to both systems. The presented planning approach can be seen as a simplified dynamic planning in a step by step manner, and in each single-time period transmission system expansion planning and distribution system expansion planning are reviewed and coordinated iteratively. A real system of a certain utility at Texas USA is investigated, and the simulation results show that the proposed method is feasible and effective. | |||
TO cite this article:Ding Xiaoying. A Comprehensive Integrated Approach for Transmission and Distribution System Long Term Planning[OL].[20 June 2013] http://en.paper.edu.cn/en_releasepaper/content/4548783 |
6. The Real-Time Relay Protection Communication Systen based on GOOSE | |||
LIU Qunying,Liu Qi-fang | |||
Dynamic and Electronic Engineering 14 September 2011 | |||
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Abstract:GOOSE (GOOSE: generic object oriented substation events) is a type of communication mode established in IEC 61850 standards to facilitate efficient and reliable communication in substation system. The protocol stack mapping method and retransmission mechanism enable the GOOSE based communication system to have good real-time performance and high reliability. This paper reports the design and implementation of a communication system, which transmits data from the source to the receiver with GOOSE protocol, for relay protection device. The design of communication system software process, the configuration approach of the message publisher, and the design and implementation of the thread refreshing and decoding in subscription equipment, are described in detail. At the end of the paper, a test system in which a GE Multiline general-purpose relay protection device is used as the message publisher, is built. The performance of the designed system is tested and analyzed on the test setup, and the test results show that the designed communication system satisfies the requirements of the protective device communication in reliability and real-time performance. | |||
TO cite this article:LIU Qunying,Liu Qi-fang. The Real-Time Relay Protection Communication Systen based on GOOSE[OL].[14 September 2011] http://en.paper.edu.cn/en_releasepaper/content/4442259 |
7. 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 |
8. Precise Estimation of Rotor Time Constant Based on Vector Control | |||
xufei | |||
Dynamic and Electronic Engineering 09 September 2008 | |||
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Abstract:Nowadays motor vector control is applied widely, but in fact motor parameter which has much effect on vector will change at any moment, which affects precision of vector control. A new method is proposed, rotor time constant can be estimated by using torque and flux current and the change of stator and rotor flux angle. Simulation show the method can compute instantaneous parameters and improve precision of vector control. | |||
TO cite this article:xufei. Precise Estimation of Rotor Time Constant Based on Vector Control[OL].[ 9 September 2008] http://en.paper.edu.cn/en_releasepaper/content/23865 |
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