Transient instability detection method based on multi-source trajectory information

Xuecong Li

doi:10.1016/j.ijepes.2019.06.009

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Transient instability detection method based on multi-source trajectory information

2019-12-01

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DOI：10.1016/j.ijepes.2019.06.009

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Abstract

En 中文

Online monitoring of dynamic stability in wide-area power system is an important condition to reduce the negative impact of out-of-step oscillations. Research shows that during the oscillation of power system, the characteristics of the disturbed trajectory can reflect the instability of the system. Benefiting from the popularization and perfection of wide area measurement system, the transient instability criterion based on the disturbed trajectory analysis has made great progress in recent years. This paper summarizes the six common instability criteria based on the disturbed trajectory and explores the relationship between the criteria in the time sequence. According to the obtained relationship, a comprehensive strategy is constructed to integrate the criteria based on multi-source trajectory information. The multiple criteria are divided by the logic of early warning and judgment, in order to enhance the reliability of transient instability detection and save time for the calculation of the real-time islanding strategy. Simulation results using the IEEE 118 bus system show that the proposed strategy gives high reliability to the system in different scenarios.

Keywords:

Out-of-step oscillation

Transient instability criterion

Disturbed trajectory

Multiple criteria integration

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