Quantitative index of transient voltage stability based on instability mechanism analysis

被引：0
|
作者：
Li X. [1 ,2 ]
Fang Y. [1 ,3 ]
Wu X. [1 ,3 ]
Hou Y. [1 ,3 ]
Li Z. [1 ,3 ]
Liu F. [1 ,3 ]
机构：
[1] State Key Laboratory of Smart Grid Protection and Control, Nanjing
[2] Extra High Voltage Branch Company of State Grid Jiangxi Electric Power Co.，Ltd., Nanchang
[3] NARI Group Corporation, State Grid Electric Power Research Institute）, Nanjing
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2023年 / 43卷 / 11期
关键词：
instability mecha⁃ nism; P-V curve; power flow section during transient state; quantitative index of stability; transient voltage stability;
D O I：
10.16081/j.epae.202301023
中图分类号：
学科分类号：
摘要：
In the transient process，the voltage instability will occur when the load bus voltage value enters the unstable region determined by the system characteristics and load characteristics. In the single-machine and single-load system model，it is proved that the critical points of static P-V curve and V-Q curve of the same system are consistent，a P-V curve analysis method of power flow section during transient state is proposed based on the technical route of dynamic tracking system characteristic variation，and a calculation method of quantitative index of transient voltage stability and corresponding stability criterion are given. In the multi-machine system，although it is usually needed to combine the proposed method with the dynamic tracking calculation of critical voltage or Thevenin equivalent circuit for application，however，there still exist the scenarios where the calculation formula based on the single-machine model can be directly applied with no need of system equivalence. The mechanism of transient voltage instability，the limitation of conventional index based on engineering experience，and the effectiveness of the proposed index and stability criterion are verified by examples. © 2023 Electric Power Automation Equipment Press. All rights reserved.
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页码：195 / 202
页数：7
相关论文
共 19 条
  • [1] (2013)
  • [2] pp. 106-107, (2011)
  • [3] LI Wenqiao, WANG Zhenshu, LI Zhongqiang, Influence of bifurcation theory based load model on voltage stability of AC／DC hybrid system[J], Electric Power Automation Equipment, 40, 11, pp. 144-149, (2020)
  • [4] QIU Wei, HE Jingbo, YU Zhao, Et al., Transient voltage stability analysis of Hunan Power Grid with infeed UHVDC[J], Elec⁃ tric Power Automation Equipment, 39, 10, pp. 168-173, (2019)
  • [5] CUI Xiaodan, WU Jialong, LEI Ming, Et al., Discussion on in⁃ ducement and fault chain search technology of cascading failure in power system with high penetration of renewable ener⁃ gy[J], Electric Power Automation Equipment, 41, 7, pp. 135-143, (2021)
  • [6] TANG Yong, ZHONG Wuzhi, SUN Huadong, Et al., Study on mechanism of power system voltage stability[J], Power Sys⁃ tem Technology, 34, 4, pp. 24-29, (2010)
  • [7] ZHANG Wenchao, ZHANG Bo, PAN Jie, Et al., Mechanism analysis for transient voltage instability based on crossfeed characteristics between power network and load of induction motor[J], Automation of Electric Power Systems, 41, 7, pp. 8-14, (2017)
  • [8] CHENG Huijie, SHUAI Zhikang, PENG Yelun, Et al., Study on transient voltage stability and improvement measures of paral⁃ leled virtual synchronous generators system with induction mo⁃ tors[J], Proceedings of the CSEE, 41, 14, pp. 4787-4798, (2021)
  • [9] LI Lili, LU Chao, WONG C K., Analytical assessment of tran⁃ sient voltage stability of load bus considering induction motors [J], Automation of Electric Power Systems, 33, 7, pp. 1-5, (2009)
  • [10] ZHANG Wenchao, PAN Xiaojie, XUE Feng, Et al., Calculation method of unstable equilibrium point of induction motors based on synthesis load model[J], Power System and Clean Energy, 34, 12, pp. 14-19, (2018)
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