Title :
Undervoltage load shedding to avoid voltage instability
Author :
Balanathan, R. ; Pahalawaththa, N.C. ; Annakkage, U.D. ; Sharp, P.W.
Author_Institution :
Dept. of Electr. & Electron. Eng., Auckland Univ., New Zealand
fDate :
3/1/1998 12:00:00 AM
Abstract :
The paper presents a technique for undervoltage load shedding (UVLS) in power systems. The undervoltage load shedding criterion has been developed using a dynamic load model. The parameters of the dynamic load model are estimated online using a nonlinear least squares technique, namely the Gauss-Newton method. The amount of load to be shed is calculated using the parameters of the dynamic load model. In the event of a voltage unstable situation, the proposed undervoltage load shedding criterion can be used to calculate the minimum amount of load to be shed at any point in time to avoid a voltage collapse. The criterion is general and can be applied to any power system
Keywords :
least squares approximations; load shedding; parameter estimation; power system stability; Gauss-Newton method; dynamic load model; minimum load amount calculation; nonlinear least squares technique; undervoltage load shedding; voltage collapse; voltage instability avoidance; voltage unstable situation;
Journal_Title :
Generation, Transmission and Distribution, IEE Proceedings-
DOI :
10.1049/ip-gtd:19981815
