Security analysis for voltage problems using a reduced model

Abstract

This paper presents a new algorithm for security analysis considering voltage security problems. The approach is based on the newly developed adaptive prefilter(APF). Reduced models are used for both contingency selection and analysis. A fast and reliable pre-screening procedure is used to screen out a large portion of non-critical cases at very little cost and provide the information needed in building reduced models for the selection and analysis procedure after the pre-screening. Tests show that the proposed approach is fast and reliable. The efficiency of this algorithm is achieved due to the following: 1) a large portion of non-critical cases are filtered out at very little cost by the APF module, 2) fast one P and fast one Q iterations are used for the contingency selection, and reduced models are used for the AC analysis, 3) some of the 1P-1Q iterations applied in the contingency selection are utilized in the contingency analysis procedure. © 1990 IEEE