Key Line Identification Based on Structure and Probability Importance

doi:10.3969/j.issn.1000-7229.2015.12.015

Abstract

Abstract:

The determination of key transmission line in power system can effectively improve the stability of the system. Therefore, this paper proposes the integrated importance indicators of lines. This method only uses the basic parameters of the system, and can overcome the disadvantage that the calculation of betweeness indicator needs the current operating mode of the system and the distribution of the power flow. The indicators can identify the key lines of the system from two aspects of the system structure and probability. According to power distribution theory, the power distribution betweeness of transmission lines was proposed as the structure importance index of the system, which took into account the line weight of directly connection node between generator and load, and could reflect the utilization degree of transmission lines in each generation and load of power transmission. And then combining with the risk index of line failure rate, the integrated importance index of the branch was put forward. The simulation analysis was carried out according to the standard examples of IEEE 39-bus, and the data obtained by the method were compared with those obtained by other criteria to verify the effectiveness of the proposed method.

Key words: flow distribution betweeness, probability importance, structure importance, integrated importance, key line identification

CLC Number:

TM 744

HE Haidan, JIA Yanbing, LIU Ruiqiong. Key Line Identification Based on Structure and Probability Importance[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(12): 97-101.

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