Performance Analysis of UFLS Schemes of Small Isolated Power Systems

Author

Sigrist, Lukas ; Egido, Ignacio ; Rouco, Luis

Author_Institution

Sch. of Eng. ICAI, Univ. Pontificia Comillas, Madrid, Spain

Volume

27

Issue

3

fYear

2012

Firstpage

1673

Lastpage

1680

Abstract

This paper presents a method for analysis of the performance of underfrequency load-shedding (UFLS) schemes. UFLS schemes play an important role in protecting the system integrity. The proposed method makes use of a Monte Carlo (MC) approach to evaluate the impact of step size variations and non-responding turbine-governor systems on the performance of UFLS schemes. The approach is applied to two isolated Spanish power systems of different size. Step size variations and non-responding turbine-governor systems are modeled by different probability density functions and their impact on the UFLS schemes of the two power systems is analyzed and compared.

Keywords

Monte Carlo methods; load shedding; probability; MC approach; Monte Carlo approach; Spanish power systems; UFLS scheme; probability density functions; small-isolated power systems; turbine-governor systems; underfrequency load-shedding scheme; Analytical models; Generators; Load modeling; Power system stability; Probability density function; Random variables; Frequency stability; Monte Carlo methods; load shedding;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/TPWRS.2011.2182066

Filename

6144732