TITLE:
The Mechanism of Voltage Instability Analysis Considering Load Characteristic
AUTHORS:
Jundong Duan, Jiaxing Huang
KEYWORDS:
Power System; Voltage Instability; Dynamic Load Character; Three Element Analysis Method; The Equiv-alent Impedance Load Model
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.4B,
November
21,
2013
ABSTRACT: Load characteristics are the main factor to affect
voltage stability. In addition, load modeling reflecting the actual load
characteristics has been a well—known difficult problem and unsolved so far, It
is mainly due to the fact that the load composition, amount and characteristics
are always changing. This paper introduces the slip into the equivalent impedance
load model to analyze load characteristic, the varying slip is
employed to indicatetime-varying load
characteristic precisely, and considering the dissimilar load behaviors,
discusses node voltage, power during the changes of load characteristic,
obtains voltage inflexion and power inflexion, and then analyzes the mechanism
of power system voltage instability based on static voltage stability region.
An example indicates the feasibility of the method.