Title :
Adaptive Underfrequency Load Shedding Based on the Magnitude of the Disturbance Estimation
Author :
Terzija, Vladimir
Author_Institution :
Univ. of Manchester, Manchester
Abstract :
Summary form only given. In the paper a new approach to adaptive underfrequency load shedding, a procedure for protecting electric power systems from dynamic instability and frequency collapse is presented. It consists of two main stages. In the first stage, the frequency and the rate of frequency change are estimated by the nonrecursive Newton type algorithm. By using the simplest expression of the generator swing equation, in the second algorithm stage the magnitude of the disturbance is determined. The underfrequency load shedding plan is adapted to the magnitude estimated, obtaining in this way a more efficient system operation during emergency conditions. Results of procedure testing are demonstrated through the dynamic simulations by using: a) a simple 3-machines test system and b) a 10-machines New England system.
Keywords :
Newton method; adaptive estimation; frequency estimation; load shedding; power system dynamic stability; power system faults; power system parameter estimation; power system planning; power system protection; 10-machines New England system; 3-machines test system; adaptive underfrequency load shedding plan; disturbance estimation; dynamic instability; electric power system protection; frequency collapse; generator swing equation; nonrecursive Newton type algorithm; Equations; Frequency estimation; Power system dynamics; Power system protection; System testing;
Conference_Titel :
Power Engineering Society General Meeting, 2007. IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
1-4244-1296-X
Electronic_ISBN :
1932-5517
DOI :
10.1109/PES.2007.385657