شبكة التخطيط العمراني بسم الله الرحمن الرحيم
للكاتب
Gamal Abdelazim Mahmoud
Electrical Engineering Dept. Suez Canal University, Port-Said, Egypt
ABSTRACT
Steady state voltage profile and line loading limit of EHV power system has been analytically
investigated from the view point of voltage instability using the Catastrophe theory. The system
voltage equations are formed in a lossless frame, the basic expressions for the power transfer limit
at critical magnitude of receiving end voltage and power angle have also developed to highlight the
implication of reactive power loading as well as power factor at the receiving end bus in a
longitudinal power line. Catastrophe theory gives, among other things, a qualitative description of
how sudden effects can arise from the smooth change of parameters in a system , and has been
applied by the author to the study of steady state and transient stability of power system. Their
analysis is with respect to angle instability. But the instability may be manifested in many different
ways, depending upon the character and configuration of the system and also upon its operating
mode. For example, in some cases in which voltage instability has been approached with no
immediate prospect of angle instability. This is particularly true in a longitudinal power line, where
the generation is away from the load center. This aspect is analytically verified in this paper.