Yy. Hong et Fm. Wang, Development of three-phase Newton optimal power flow for studying imbalance/security in transmission systems, ELEC POW SY, 55(1), 2000, pp. 39-48
This paper presents a three-phase optimal power flow (TOPF) method based on
Newton's method for the off-line balance/imbalance and security analysis o
f large scale transmission systems. The TOPF deals with minimization of the
system three-phase MW losses while satisfying three-phase power flow equat
ions, three-phase security constraints and voltage imbalance factor (VIF) c
onstraints, etc. The three-phase models considering the coupling effect amo
ng the phases are used in this method. All models are based on the phase fr
ame representation. The sparse matrix technique is used and the pivoting pr
ogramming techniques for reducing the computer memory required is addressed
. Several functions are implemented in the proposed software for a more rea
listic simulation; these functions include the reduction of the controller
set, treatment of infeasibility, implementation of static VAR compensators
(SVCs), selection of load models, and initialization, etc. An algorithm cov
ering the main and trial iterations is used for identifying an accurate set
of active inequality constraints. The 265-bus Taipower system is used to s
erve as an example for illustrating the performance of the proposed method
in studying the imbalance problem caused by the upcoming high-speed electri
c railway load in Taiwan. (C) 2000 Elsevier Science S.A. All rights reserve
d.