Review on Configuration and Setting Methods of Under Voltage Load Shedding of Power Systems

Wei LIU; Yong ZHAO; Yinsheng SU; Yan CHEN; Zhihuan LI; Fan ZHANG

doi:10.13648/j.cnki.issn1674-0629.2015.02.006

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South Power Sys Technol ›› 2015, Vol. 9 ›› Issue (2) : 36-43. DOI: 10.13648/j.cnki.issn1674-0629.2015.02.006

Reactive Power Utilization

Review on Configuration and Setting Methods of Under Voltage Load Shedding of Power Systems

Wei LIU ¹ ,
Yong ZHAO ¹ ,
Yinsheng SU ² ,
Yan CHEN ¹ ,
Zhihuan LI ² ,
Fan ZHANG ¹

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Abstract

Under voltage load shedding (UVLS) is one of the efficient measures of emergency control to prevent transient voltage collapse of power systems. UVLS schemes used in some foreign and domestic power grids are introduced in this paper. The configurations and setting methods of UVSL are analyzed and summerized in the aspects of control mode, installation location, action condition, time delay, scale of load shedding and simulation calculation. Centralized control mode is usually adopted in foreign power grids, while distributed control mode is usually adopted in domestic power grids. For the action condition and the delay time of UVSL, voltage level is usually used as action condition in centralized control mode while more complicated comprehensive criterias are usually used as action condition in distributed control mode. UVLS should be of coordination with not only the security and economy of power grid but also the UFLS, and meets the development requirement of both AC/DC hybrid power grid and intelligent power grid.

Key words

under voltage load shedding / voltage stability / configuration / setting

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Wei LIU , Yong ZHAO , Yinsheng SU , et al . Review on Configuration and Setting Methods of Under Voltage Load Shedding of Power Systems[J]. Southern Power System Technology. 2015, 9(2): 36-43 https://doi.org/10.13648/j.cnki.issn1674-0629.2015.02.006

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