7 z8 P$ N3 C4 T$ j" C }powerttech 的DSA是用于系统稳定性分析的强大工具,SSAT是其中用于系统小干扰建模的模块。 0 E& h( A! ~: c9 }6 z# wMain Features( b: f$ i [( m! l
Modeling " [3 h+ g+ L. j, O. G8 ?6 U' x' C; }SSAT accepts powerflow data in the native formats of DSAToolsTM (PSF and PFB), as well as other 1 s. u8 L! @/ ?: B. M7 |0 \7 Gcommonly used format such as PTI PSS/E format, GE PSLF format, and BPA format. T. Q( Y. V' }/ ]2 [5 Z- @
Dynamic models of devices commonly represented for stability studies are available in SSAT. Data of, Y. }, f+ J9 D/ V
models can be in DSAToolsTM, PTI PSS/E, GE PSLF, BPA format. 8 h3 K/ d- i" Z5 {% sThe actual dynamic models used in an SSAT analysis can be customized from the data set provided in all5 X. N0 v5 m% y7 I- p. ~% M. m
data files, by using the dynamic representation specifications. 6 p! Z9 {/ U2 c% x7 p+ `& _" K+ l8 t) C2 o2 h( n# G% @
Computation options d. B$ y) E3 \' C5 o+ k
There are 11 computation options available in SSAT. These include:8 D# p/ |, C* d3 l# L/ ^+ n$ h
(1) Complete eigenvalue analysis ( C7 m, s4 w- y. E(2) Single-Machine-Infinite-Bus (SMIB) analysis % v& I; r1 e; t(3) Single-Machine-Infinite-Bus (SMIB) scan for the entire system 4 y$ \8 D. _8 |0 S1 {& b(4) Eigenvalue analysis within specified frequency and damping ranges3 p3 L# g) q4 m
(5) Computation of modes closest to a specified frequency and damping 4 s, T) V0 S2 M(6) Computation of modes related to a generator " h' G, b: w! C. R- E(7) Small-signal stability index for contingency ranking! r; _3 U: B) Z J
(8) Time and frequency response calculations / n9 e& s3 v- J(9) Sensitivity analysis0 W% _% c5 I5 m
(10) Small-signal stability limit search + v. F' X* g, k(11) Mode trace