Migration Characteristics of Out-of-step Center in Power System Under Large-scale Centralized Photovoltaic Grid-connected Scene

被引：0
|
作者：
Wang F. [1 ]
Tang F. [1 ]
Liu D. [1 ]
Liu J. [1 ]
Zhao H. [2 ]
Zhao X. [2 ]
机构：
[1] School of Electrical Engineering and Automation, Wuhan University, Wuhan
[2] Economic & Technology Research Institute, State Grid Hubei Electric Power Company, Wuhan
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 11期
基金：
中国国家自然科学基金;
关键词：
External characteristics; Grid-connected PV; Impedance characteristics; Migration characteristics; Oscillation center; Out-of-step center;
D O I：
10.13336/j.1003-6520.hve.20181206031
中图分类号：
学科分类号：
摘要：
Under the background of the large-scale centralized photovoltaic grid-connected scene, the research on the migration mechanism of out-of-step center is insufficient. Consequently, taking the impedance characteristics of photovoltaic as the entry point, we studied the migration mechanism of out-of-step center. According to the PV power model and its different failure control strategies, the external characteristics of the PV are equivalent to the dynamic changing negative impedance. Then the variation of the out-of-step center under two scenes are derived, PV replacement for one of the synchronous machines with the same capacity, and PV is directly grid-connected in equivalent three-machine system. The simulation of the IEEE 9-bus system and IEEE 39-bus system verifies the correctness of the theoretical analysis. The results show that, as the PV output increases, the oscillation center shifts from one side of the line to the opposite side, and the distribution range increases gradually when it is away from the power source, and decreases gradually when it is close to the power source. Out-of-step center migration direction is away from the PV access point. The research results can provide references for the out-of-step splitting of the grid with large-scale centralized PV access. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
引用
收藏
页码：3656 / 3665
页数：9
相关论文
共 24 条
  • [1] Wang W., Wang S., Status and prospects of distributed photovoltaic power generation in China, Proceedings of the Chinese Academy of Sciences, 31, 2, pp. 165-172, (2016)
  • [2] Wei S., Tian Y., Wang Y., Et al., Virtual inductance control for enhancing stability of LCL inverter in weak grid, High Voltage Engineering, 45, 6, pp. 1827-1834, (2019)
  • [3] Liu F., Fang Y., Li W., Et al., Out-of-step oscillation center change rules and its location under multi-frequency oscillation, Automation of Electric Power Systems, 38, 20, pp. 68-73, (2014)
  • [4] Tang F., Yang J., Liao Q., Et al., Out-of-step oscillation splitting criterion based on bus voltage frequency, Journal of Modern Power Systems and Clean Energy, 3, 3, pp. 341-352, (2015)
  • [5] Alquthami T., Ravindra H., Faruque M.O., Et al., Study of photovoltaic integration impact on system stability using custom model of PV arrays integrated with PSS/E, North American Power Symposium (NAPS), pp. 1-8, (2010)
  • [6] Ding J., Ma S., Zhao W., Et al., Difficulties and preliminary conception of isolation strategy on power grid out of step islanding, High Voltage Engineering, 43, 7, pp. 2394-2401, (2017)
  • [7] Gao B., Yao L., Li R., Et al., The oscillation mode analysis of large-scale photovoltaic power station grid-connection, Electric Power Automation Equipment, 37, 8, pp. 123-130, (2017)
  • [8] Lei X., The research and analysis on out-of-step separation of large-scale interconnected power systems, (2008)
  • [9] Feng K., Zhang Y., Liu Z., Et al., A new scheme for out-of-step splitting considering drift of oscillation center, Power System Technology, 39, 4, pp. 1082-1087, (2015)
  • [10] Xia C., Chen C., Tu L., Et al., Applicability analysis of the out-of-step solution criterion under multi-frequency oscillation, Automation of Electric Power Systems, 40, 4, pp. 26-31, (2016)
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