Location and Pre-warning Strategy of Out-of-step Center Under Multi-frequency Oscillation Based on Voltage Phase Angle Trajectory

被引：0
|
作者：
Liu J. [1 ]
Tang F. [1 ]
Liao Q. [1 ]
Liu D. [1 ]
Xiao G. [1 ]
Tang X. [1 ]
机构：
[1] School of Electrical Engineering, Wuhan University, Wuhan, 430072, Hubei Province
来源：
Tang, Fei (tangfei@whu.edu.cn) | 1600年 / Chinese Society for Electrical Engineering卷 / 37期
基金：
中国国家自然科学基金;
关键词：
Multi-frequency out-of-step oscillation; Out-of-step center; Positioning; Pre-warning strategy; Voltage phase angle trajectory;
D O I：
10.13334/j.0258-8013.pcsee.162211
中图分类号：
学科分类号：
摘要：
With the rapid development of UHV AC/DC projects, the power system is vulnerable to instability of multi-group modes. As a result, it is urgent to research the migration rule of the out-of-step center in multiple-frequency conditions. Based on theoretical derivation of the swing center location in the three machines system, the migration rule of the swing center in multi-frequency conditions was analyzed. Accordingly, the necessary and sufficient condition for the out-of-step center was obtained, which was depicted in a voltage phase angle plane where the phase angle of three machines should satisfy the constraints. Based on this, a pre-warning strategy of the out-of-step center was proposed. According to the voltage angle and frequency as the phase angle trajectory approaches to the constraints, the appearance time and location of the out-of-step center can be calculated. So the splitting device is activated in advance, which guarantees it works in time. Finally, IEEE 9 and IEEE 118 system in PSS/E verify the effectiveness of the forecasting method. © 2017 Chin. Soc. for Elec. Eng.
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收藏
页码：4070 / 4078
页数：8
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