Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/585374
Title: Decentralized Coordination of Load Shedding and Plant Protection Considering High Share of RESs
Authors: Bakhtyar Hoseinzadeh;Filipe Faria da Silva;Claus Leth Bak
subject: High wind power penetration|plant protection|adaptive relay|rate of change of frequency|decentralized under frequency load shedding
Year: 2016
Publisher: IEEE
Abstract: This paper estimates the average Rate of Change of Frequency (ROCOF) following islanding and/or cascading event/s using inflection points of frequency profile. Moreover, a frequency collapse barrier scheme is set up by tuning the frequency set points of Load Shedding (LS) relays as a dynamic variable using voltage drop data coordinated with plant protection scheme. A frequency anti stalling scheme is developed to interrupt more load feeders in case of frequency stall between consecutive set points. This time-based approach adjusts the time delay of the relay stages to disconnect the feeders with more voltage drop first, in order to bring the frequency back to the permissible range before the tolerable time period of plant protection relays is over. The load curtailment is stopped to avoid over LS, if the proposed algorithm recognizes that the frequency reaches the safe region in time based on estimated average ROCOF. Tripping of feeders, which inject active or reactive power to the grid due to penetration of dispersed generations into the load feeders is also prevented by considering the power flow direction of feeders.
URI: http://localhost/handle/Hannan/166332
http://localhost/handle/Hannan/585374
ISSN: 0885-8950
1558-0679
volume: 31
issue: 5
Appears in Collections:2016

Files in This Item:
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Title: Decentralized Coordination of Load Shedding and Plant Protection Considering High Share of RESs
Authors: Bakhtyar Hoseinzadeh;Filipe Faria da Silva;Claus Leth Bak
subject: High wind power penetration|plant protection|adaptive relay|rate of change of frequency|decentralized under frequency load shedding
Year: 2016
Publisher: IEEE
Abstract: This paper estimates the average Rate of Change of Frequency (ROCOF) following islanding and/or cascading event/s using inflection points of frequency profile. Moreover, a frequency collapse barrier scheme is set up by tuning the frequency set points of Load Shedding (LS) relays as a dynamic variable using voltage drop data coordinated with plant protection scheme. A frequency anti stalling scheme is developed to interrupt more load feeders in case of frequency stall between consecutive set points. This time-based approach adjusts the time delay of the relay stages to disconnect the feeders with more voltage drop first, in order to bring the frequency back to the permissible range before the tolerable time period of plant protection relays is over. The load curtailment is stopped to avoid over LS, if the proposed algorithm recognizes that the frequency reaches the safe region in time based on estimated average ROCOF. Tripping of feeders, which inject active or reactive power to the grid due to penetration of dispersed generations into the load feeders is also prevented by considering the power flow direction of feeders.
URI: http://localhost/handle/Hannan/166332
http://localhost/handle/Hannan/585374
ISSN: 0885-8950
1558-0679
volume: 31
issue: 5
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7348727.pdf1.19 MBAdobe PDFThumbnail
Preview File
Title: Decentralized Coordination of Load Shedding and Plant Protection Considering High Share of RESs
Authors: Bakhtyar Hoseinzadeh;Filipe Faria da Silva;Claus Leth Bak
subject: High wind power penetration|plant protection|adaptive relay|rate of change of frequency|decentralized under frequency load shedding
Year: 2016
Publisher: IEEE
Abstract: This paper estimates the average Rate of Change of Frequency (ROCOF) following islanding and/or cascading event/s using inflection points of frequency profile. Moreover, a frequency collapse barrier scheme is set up by tuning the frequency set points of Load Shedding (LS) relays as a dynamic variable using voltage drop data coordinated with plant protection scheme. A frequency anti stalling scheme is developed to interrupt more load feeders in case of frequency stall between consecutive set points. This time-based approach adjusts the time delay of the relay stages to disconnect the feeders with more voltage drop first, in order to bring the frequency back to the permissible range before the tolerable time period of plant protection relays is over. The load curtailment is stopped to avoid over LS, if the proposed algorithm recognizes that the frequency reaches the safe region in time based on estimated average ROCOF. Tripping of feeders, which inject active or reactive power to the grid due to penetration of dispersed generations into the load feeders is also prevented by considering the power flow direction of feeders.
URI: http://localhost/handle/Hannan/166332
http://localhost/handle/Hannan/585374
ISSN: 0885-8950
1558-0679
volume: 31
issue: 5
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7348727.pdf1.19 MBAdobe PDFThumbnail
Preview File