• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

ELECTRIC POWER CONSTRUCTION ›› 2023, Vol. 44 ›› Issue (12): 136-147.doi: 10.12204/j.issn.1000-7229.2023.12.012

• Stability Analysis and Control of New Power System ?Hosted by Associate Professor XIA Shiwei, Professor XU Yanhui, Professor YANG Deyou and Associate Professor LIU Cheng? • Previous Articles     Next Articles

Power Grid Voltage Phasor Trajectory Fitting and Transient Stability Evaluation Index Construction Based on Alternate Direction Multiplier Method

MA Haibin1(), LIU Daowei2(), ZHAO Gaoshang2(), YANG Hongying2(), YUAN Fei1(), GAO Shen1()   

  1. 1. School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, Jilin Province, China
    2. China Electric Power Research Institute, Beijing 100192, China
  • Received:2022-11-02 Published:2023-12-01 Online:2023-11-29
  • Supported by:
    National Key R&D Program of China(2018YFB0904500)


The quantitative assessment of the transient stability of a power system constitutes the basis of the online security defense of a large power grid, and the construction of a transient stability prediction index based on the dynamic trajectory information of the power grid is key. The grid voltage phasor trajectory information contains richer stable behavior characteristics. In this study, using a dual-machine system as an example, the evolution law between the transient energy conversion of the generator and the voltage phase trajectory is first analyzed from the perspective of trajectory geometry. The reasoning is based on the EEAC. Thus, the universality of the multi-machine system is verified. To realize the fast prediction of transient stability, a trajectory fitting method based on the alternating direction multiplier method is proposed, which has obvious advantages in fitting accuracy and speed. Based on the arc length distance of the voltage phasor trajectory fitting curve as the data support, a fast prediction index of transient stability is constructed. Finally, the evaluation accuracy of the proposed method is verified using the simulation data of a 10-machine, 39-node system in New England and a provincial power grid as examples.

Key words: voltage phasor trajectory, trajectory fitting, transient stability, evaluation index

CLC Number: