Open AccessVulnerability analysis of power system based on dynamic regional electrical coupling
Author(s) -
Zhou Ming,
Li Jingyu,
Wu Shunyu,
Liu Siwei,
Li Gengyin,
Liu Jianqin
Publication year - 2019
Publication title -
international transactions on electrical energy systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 42
ISSN - 2050-7038
DOI - 10.1002/etep.2671
Subject(s) - electric power system , transient (computer programming) , electric power transmission , coupling (piping) , node (physics) , power (physics) , coupling coefficient of resonators , transmission (telecommunications) , power transmission , cascading failure , electronic engineering , computer science , engineering , electrical engineering , physics , mechanical engineering , structural engineering , quantum mechanics , resonator , operating system
Summary Power systems play a crucial role in people's lives. To ensure the safety of this system, a vulnerability analysis of the power system is carried out to identify the vulnerable nodes in the grid. First, the electrical coupling relation between neighbor nodes is designed according to the equivalent electrical impedance of power transmission lines, and the regional electrical coupling coefficient, which reflects a node's ability to affect its neighbor nodes' operation state, is defined. Then, considering both the level and direction of power flow on power transmission line, the regional interdependency efficiency of the node is presented to improve the regional electrical coupling coefficient mentioned above. To take into account the dynamic propagation of electrical state coupling among nodes in the power system, a coupling tracking rank algorithm is proposed to identify the correlation between the failure of nodes and transient state of the power system. The proposed method is validated using the IEEE 39‐BUS test system. Simulation results demonstrate that the nodes that affect the transient stability of power system most when they fail can be identified effectively.