Transient stability analysis based on the state-plane trajectory and the relative kinetic energy change rate

The Journal of Engineering

Zhijian Liu¹  Yingbi Sun² 

[1] Faculty of Electric Power Engineering, Kunming University of Science and Technology , Kunming 650504 , People's Republic of China

关键词: transient stability analysis;    system stability;    energy transformation;    power system;    transient energy;    state-plane trajectory;    IEEE New Engl;    10-machine 39-bus system;    wide area measurement system;    relative kinetic energy change rate;    single-machine infinite system;    real-time transient stability identification method;   

DOI  :  10.1049/joe.2018.8341

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

Due to the widespread application of the wide area measurement system in power systems, it has become feasible to identify the transient stability of a power system on-line. A real-time transient stability identification method combining state-plane trajectory and relative kinetic energy is proposed. First, the correlation between the minimum value of the state-plane trajectory and the system stability is analysed in a single-machine infinite system. On this basis, the relationship between the concavity–convexity of the trajectory and the transient stability is discussed in detail. Second, the calculation of the transient energy is introduced to analyse the energy transformation and a sub-criterion is presented. The comprehensive application of trajectory characteristics and energy criteria can accurately determine the transient stability of all of the units, which is of great practical significance for accurately cutting off the unstable units when system faults occur. A simulation analysis with the IEEE New England 10-machine 39-bus system verified the correctness and effectiveness of the proposed method.

【 授权许可】

CC BY