A New Method for under Voltage Load Shedding Using Voltage Sensitivity and Load Reactive Power
Subject Areas : electrical and computer engineering
J.
Modarresi
1
E.
Gholipour
2
A.
Khodabakhshian
3
Keywords: Under voltage load shedding effective bus reactive power voltage sensitivity voltage stability,
Abstract :
Load shedding is the last line of defense for controlling and stabilizing of the power system in the occurrence of a disturbance. Determining the amount and location of the load shedding are issues that the power system operators always have faced In this paper, a new method is proposed for determining the location of under voltage load shedding (UVLS). The proposed method, unlike the previous UVLS methods, uses two different factors to determine the effective location of UVLS. Considering the load reactive power in the process of determination of the UVLS location leads to disconnecting more reactive power during the initial steps of UVLS. Therefore, less active power sheds by the UVLS. To verify the accuracy of the proposed method, the proposed UVLS method accompanied with the method which uses the sensitivity of voltage with respect to the active power are implemented in IEEE 118-bus test system and New England 39 bus system. The obtained results show the superiority of the proposed method.
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