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Title: The Influence of Topology Changes on Inter-area Oscillation Modes and Mode Shapes

Abstract

The topology of a power grid network is a piece of critical information for power grid operations. Different power grid topologies can change grid characteristics, inter-area oscillation modes, mode shapes, and even the robustness of the power system. This paper presents some preliminary study results, based on an approved WECC operating case and a modified low damping WECC system, to show the impact of topology changes resulting from N-1 contingencies on power system modes and mode shapes. The results show that topology changes can have very different impact on modal properties in a power system: some result in unstable situation, while others can improve small signal stability. For the former, the studies show about 4.5% damping reduction, so 5% damping margin would be required to ensure the system can sustain the contingencies. For the latter, those topology changes could be used as a control method to improve small signal stability. Mode shapes normally do not change when there is an N-1 topology change. These observations suggest that the inclusion of topological information is useful for improving the accuracy and effectiveness of power system control schemes.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1028068
Report Number(s):
PNNL-SA-77205
TD5015020; TRN: US201121%%713
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: 2011 IEEE Power and Energy Society General Meeting, July 24-29, 2011, Detroit, Michigan
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; ACCURACY; DAMPING; OSCILLATION MODES; POWER SYSTEMS; STABILITY; TOPOLOGY; Topology Change, Inter-area Modes, Mode Shape, Small Signal Stability

Citation Formats

Chen, Yousu, Fuller, Jason C., Diao, Ruisheng, Zhou, Ning, Huang, Zhenyu, and Tuffner, Francis K. The Influence of Topology Changes on Inter-area Oscillation Modes and Mode Shapes. United States: N. p., 2011. Web. doi:10.1109/PES.2011.6039904.
Chen, Yousu, Fuller, Jason C., Diao, Ruisheng, Zhou, Ning, Huang, Zhenyu, & Tuffner, Francis K. The Influence of Topology Changes on Inter-area Oscillation Modes and Mode Shapes. United States. doi:10.1109/PES.2011.6039904.
Chen, Yousu, Fuller, Jason C., Diao, Ruisheng, Zhou, Ning, Huang, Zhenyu, and Tuffner, Francis K. Mon . "The Influence of Topology Changes on Inter-area Oscillation Modes and Mode Shapes". United States. doi:10.1109/PES.2011.6039904.
@article{osti_1028068,
title = {The Influence of Topology Changes on Inter-area Oscillation Modes and Mode Shapes},
author = {Chen, Yousu and Fuller, Jason C. and Diao, Ruisheng and Zhou, Ning and Huang, Zhenyu and Tuffner, Francis K.},
abstractNote = {The topology of a power grid network is a piece of critical information for power grid operations. Different power grid topologies can change grid characteristics, inter-area oscillation modes, mode shapes, and even the robustness of the power system. This paper presents some preliminary study results, based on an approved WECC operating case and a modified low damping WECC system, to show the impact of topology changes resulting from N-1 contingencies on power system modes and mode shapes. The results show that topology changes can have very different impact on modal properties in a power system: some result in unstable situation, while others can improve small signal stability. For the former, the studies show about 4.5% damping reduction, so 5% damping margin would be required to ensure the system can sustain the contingencies. For the latter, those topology changes could be used as a control method to improve small signal stability. Mode shapes normally do not change when there is an N-1 topology change. These observations suggest that the inclusion of topological information is useful for improving the accuracy and effectiveness of power system control schemes.},
doi = {10.1109/PES.2011.6039904},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {10}
}

Conference:
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