【正文】 11. Ha L. T., Saha T. K., Investigation of Power Loss and Voltage Stability Limits for Large Wind Farm Connections to a Subtransmission Network, Power Engineering Society General Meeting, 2020, 2, p. 22512256. 附件 2：外文原文 （復印件） Impact of Wind Power on the Angular Stability of a Power System Djemai NAIMI1, Tarek BOUKTIR2 1 Department of Electrical Engineering, University of Biskra, Algeria 2 Department of Electrical Engineering, University of Oum El Bouaghi, Alg , Abstract Wind energy conversion systems are very different in nature from conventional generators. Therefore dynamic studies must be addressed in order to integrate wind power into the power system. Angular stability assessment of wind power generator is one of main issues in power system security and operation. The angular stability for the wind power generator is determined by its corresponding Critical Clearing Time (CCT). In this paper, the effect of wind power on the transient fault behavior is investigated by replacing the power generated by two main types of wind turbine, increasing gradually a rate of wind power peration and changing the location of wind resources. The simulation analysis was established on a 14 bus IEEE test system by PSAT/Matlab, which gives access to an extensive library of grid ponents, and relevant wind turbine model. Keyword Angular Stability, CCT, Wind Turbine, Wind Peration, PSAT. Introduction A power work is a plex system, which is vulnerable to disturbances. A transient short circuit fault is a very mon disturbance in a power system [1]. It upsets the rotating machines in the vicinity of the fault, causing the speeds of these machines, and the power flows in the work to oscillate. When the short circuit is cleared by disconnecting the faulted line, the generators that have accelerated will decelerate and e back into synchronism with the rest of the system. If they do not, and the system bees unstable, there is a risk of widespread blackouts and of mechanical damage to generators. So the critical clearing time (CCT) is the maximum time interval by which the fault must be cleared in order to preserve the system stability [2, 3]. There is no doubt that wind power will play a predominant role in adding clean and nonpolluting energy to the country’s grid. However, as more wind turbines are connected to the grid, their impact on the power quality of services populated with wind generation is being more evident, so it is important to analyze the transient stability of power system including wind power stations [4]. A threephase fault is applied to a 14 bus IEEE test system, and cleared by disconnecting the affected line. In this paper, the focus is limited to determine Critical Clearing Time (CCT) for the several cases by observing the transit behavior simulation of a test system during grid faults using a Matlab power system analyze toolbox (PSAT) [5]. The structure of this paper is as follows. First, the wind model is described briefly。rensen P., Norheim I., Rasmussen C. Simulation of the Impact of Wind Power on the Transient Fault Behavior of the Nordic Power System, Electric Power Systems Research, VOL: article in press, available online 24 March, 2020, p. 135144. 5. Federico Milano, Power System Analysis Toolbox Documentation for PSAT version β1, July 9, 2020. 6. Soerensen P., Hansen ., Pedro Andre Carvalho Rosas, Wind Models for Prediction of Power Fluctuations of Wind Farms, J. Wind Eng. Ind. Aerodyn, 2020, 90, p. 13811402. 7. Tang Hong, WuJunling, Zhou Shuangxi, Modeling and Simulation for Small Signal Stability Analysis of Power System Containing Wind Farm, J. Power System Technology, 2020, 28(1), 3841. 8. Hansen ., S248。 References 1. Sun T., Chen Z., Blaabjerg F., Voltage recovery of gridconnected wind turbines after a shortcircuit fault, Annual Conference of the IEEE Industrial Electronics Society, Virginia, USA, 2020. 2. Saffet Ayasun