9291_c015 - 15 Dynamic Security Assessment Peter W. Sauer...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 15 Dynamic Security Assessment Peter W. Sauer University of Illinois at Urbana- Campaign Kevin L. Tomsovic Washington State University Vijay Vittal Arizona State University 15.1 Definitions and Historical Perspective ........................ 15-1 15.2 Criteria for Security ...................................................... 15-2 15.3 Assessment and Control............................................... 15-3 15.4 Dynamic Phenomena of Interest................................. 15-3 15.5 Timescales ...................................................................... 15-3 15.6 Transient Stability.......................................................... 15-4 15.7 Modeling........................................................................ 15-4 15.8 Criteria and Methods.................................................... 15-5 Numerical Integration . Direct = Lyapunov Methods . Probabilistic Methods . Expert System Methods . Database or Pattern Recognition Methods 15.9 Recent Activity............................................................... 15-6 15.10 Off-Line DSA................................................................. 15-7 15.11 On-Line DSA................................................................. 15-8 15.12 Status and Summary..................................................... 15-8 15.1 Definitions and Historical Perspective Power system security in the context of this chapter is concerned with the technical performance and quality of service when a disturbance causes a change in system conditions. Strictly speaking, every small change in load is a disturbance that causes a change in system conditions; however, this topic focuses on what could be called ‘‘large changes’’ in system conditions. These changes are referred to as ‘‘contin- gencies.’’ Most commonly, contingencies result in relay operations that are designed to protect the system from faults or abnormal conditions. Typical relay operations result in the loss of a line, transformer, generator, or major load. When changes occur, the various components of the power system respond and hopefully reach a new equilibrium condition that is acceptable according to some criteria. Mathematical analysis of these responses and new equilibrium condition is called security analysis. If the analysis evaluates only the expected postdisturbance equilibrium condition (steady-state operating point), this is called static security assessment (SSA). If the analysis evaluates the transient performance of the system as it progresses after the disturbance, this is called dynamic security assessment (DSA). DSA has been formally defined by the Institute of Electrical and Electronics Engineers (IEEE), Power Engineering Society’s (PES), working group on DSA as Dynamic Security Assessment is an evaluation of the ability of a certain power system to withstand a defined set of contingencies and to survive the transition to an acceptable steady-state condition....
View Full Document

This note was uploaded on 03/03/2010 for the course POWER 332 taught by Professor Dr during the Spring '10 term at Ain Shams University.

Page1 / 10

9291_c015 - 15 Dynamic Security Assessment Peter W. Sauer...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online