DocumentCode :
58570
Title :
Adaptive Tuning of Frequency Thresholds Using Voltage Drop Data in Decentralized Load Shedding
Author :
Hoseinzadeh, Bakhtyar ; da Silva, Filipe Miguel Faria ; Bak, Claus Leth
Author_Institution :
Dept. of Energy Technol., Aalborg Univ., Aalborg, Denmark
Volume :
30
Issue :
4
fYear :
2015
fDate :
Jul-15
Firstpage :
2055
Lastpage :
2062
Abstract :
Load shedding (LS) is the last firewall and the most expensive control action against power system blackout. In the conventional under frequency LS (UFLS) schemes, the load drop locations are already determined independently of the event location. Furthermore, the frequency thresholds of LS relays are prespecified and constant values which may not be a comprehensive solution for widespread range of possible events. This paper addresses the decentralized LS in which the instantaneous voltage deviation of load buses is used to determine the frequency thresholds of LS relays. The higher frequency thresholds are assigned to the loads with larger voltage decay which are often located in the vicinity of disturbance location. The proposed method simultaneously benefits from individual UFLS and under voltage LS (UVLS) features which operate in the power system without coordination. Numerical simulations in DigSilent PowerFactory software confirm the efficiency of proposed methodology in the stabilization of the power system after various severe contingencies.
Keywords :
load shedding; power system reliability; power system stability; relay protection; DigSilent PowerFactory software; LS relays; UFLS schemes; UVLS features; decentralized LS; disturbance location; event location; frequency thresholds; instantaneous voltage deviation; load buses; load drop locations; load shedding; power system blackout; power system stabilization; under frequency LS schemes; under voltage LS features; voltage decay; Delays; Frequency control; Power system stability; Relays; Threshold voltage; Time-frequency analysis; Voltage measurement; Adaptive frequency threshold; decentralized under voltage load shedding; protection relay;
fLanguage :
English
Journal_Title :
Power Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8950
Type :
jour
DOI :
10.1109/TPWRS.2014.2351015
Filename :
6893056
Link To Document :
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