计及感应电动机负荷的静态电压稳定性分析9 d- K! O2 T r- F
孙华东1, 周孝信1,李若梅2- r% a, j- L' a4 k
(1. 中国电力科学研究院,北京市 海淀区100085; 2. 中国电机工程学会, 北京市 宣武区100761)4 B4 y0 V/ R+ y# ~
STATIC VOLTAGE STABILITY ANALYSIS CONSIDERING INDUCTION 2 ~& d a5 C7 P; v0 S6 A* NMOTOR LOADS. p, [0 s; w. M7 t, X/ D+ }
SUN Hua-dong1, ZHOU Xiao-xin1, LI Ruo-mei2 U" [* `( _( X5 ?7 J
(1. Electric Power Research Institute, Haidian District, Beijing 100085, China;4 N; I! i7 Y5 O
2. Chinese Society of Electrical Engineering, Xuanwu District, Beijing 100761, China)* s" ^3 ]0 Q* ~3 C$ d
ABSTRACT: A small disturbance voltage stability analysis/ x n9 T8 E$ _8 B$ b5 Z9 h
mathematical model of single load and infinite bus system is * c- X* W+ x( Y# lpresented including electromechanical transient model of8 U- W2 d& V; h! ~. l% E3 {/ @
induction motor. The influence of induction motor parameters/ X; X0 x* T& n7 ?) R) C; j$ K9 q
on eigenvalues on a simple power system is analyzed. The $ o% B" @$ I9 T& {: N* Ecommon physical essence of static voltage stability indices 3 Y1 C& w1 L; r. L% p$ D2 {based on power flow model is illustrated on a simple system.* G0 Z$ N% j# |2 w/ u
The accuracy of static voltage stability indices based on power & g+ S1 Y9 C. t% X) F6 x% lflow model is analyzed by small disturbance voltage stability$ r+ q5 d, g# X9 e
analysis and dynamic simulation with different parameters of + ?( c1 z! ^1 w: `) g5 ainduction motor. The results show that static indices based on( E6 O" k" @! x' V9 C/ N" S
power flow model is not accurate. The system may lose voltage: j1 Q4 q' s$ r' I# M6 w+ Q0 f+ ~7 o
stability which the static indices regard it is voltage stability.: ^0 ` i/ D/ D" F8 P
The small disturbance voltage stability analysis mathematical- N5 ]- _- d {& U
model in this paper is simplified analysis. It is expected to be 3 H' e, Q9 x$ l4 Q% z. X! W6 |used in the on-line environment in the future