|
|
发表于 2013-3-12 16:16:30
|
显示全部楼层
本帖最后由 xeqja 于 2013-3-12 16:25 编辑
; {, O& ^& m9 A4 L A0 J
. {% F8 ~. O$ M支持楼主，但是我下载后解压出错，不能用啊。楼主好心可不可以发邮件给我：xeqja@163.com，另外我有一个问题，在论坛上问了好久没有人回答，问到客服，很悲催地被要求提供软件授权号，你懂的，在天朝国度里像我这样的小白只能用一用石皮解，哪里有授权号，楼主可否顺便帮我把问题给回答了：8 ?9 [. G. K1 F
( M( T/ d5 D& p* \/ ]请教大侠们，我在做pscad变压器仿真时遇到一个问题很不懂：" W: o' O$ s$ C: S- M5 k# c! N
! d2 ~: a. H8 \/ a6 B, b7 R- _umec模型中考虑饱和情况下，设置的U-I曲线与仿真结果总对不上，例如我把一个系统默认的umec变压器模型来做空载试验模拟，模拟的电源用理想电源，依次施加不同的电压测量其空载电流，仿真测量的U-I曲线与Saturation Curve设置窗口中对应标幺值换算的U-I曲线差别很大，这是为什么呢？应该是一样的才对啊！- R, r/ O9 \# M/ {7 M) s
原文标题：pscad中变压器模型问题 - PSCAD - 电力研学论坛 专注电力技术应用，关注电力科技前沿，打造专业电力社区！ - Powered by Discuz!, H" F1 }; v* v- z6 G4 ^8 Q
原文链接：https://tech.cepsc.com/thread-87732-1-1.html4 p. w* y8 F$ P3 ^
. s: S* g4 w/ Y/ @# l问题原文Dear Sir/Madam:
0 Z5 H) Q$ J: f" H% V4 a
6 q; `- m) ?5 E! q/ b
}, u! T( @7 v+ T
; d4 j( l8 E6 g! j( YI'm a beginer of the PSCAD software (version 4.2.1) , and I have a question about UMEC transformer model during learning. Would you please help me? I will be very grateful to you if you give me an answer or give me some clews.
2 ^ E F% e7 t+ U, w7 _$ o( c; W$ {0 h) V) {
D( A% c4 u( ?8 N s4 M1 d1 F
# t7 ]- b w- M0 l
The question is about the UMEC transformer model in PSCAD 4.2. For the UMEC transformer, why is the measured no-load current not equal to the set value in saturation curve?
; W5 N8 }$ q4 x' l. h3 B* Y5 H5 Q B; [# n% g& i
- w; L2 ^) j7 f/ P* C, B. K6 b3 q, z2 H. [4 W
For example, the transformer illustrated in the following circuit(Figure 1) is a model from the Master Library without any change, its rated power is 100MVA, and its rated voltage is 230kV(Figure 2). According to the saturation curve, its no-load current should be I0=100MVA/230kV*2%=8.7A, but in the no-load test simulation (In Figure 1. a ideal power supply is used), the measured no-load current is 2.61655A, which is quite different from the set value. * g" o9 n& f3 m# l
$ g3 I' I1 k9 ?& BThe whole Saturation Curve is simulated as well. The comperation of measured value and set value of saturation curve is shown in Tabel 1 and Figure 3.
" }7 ~( p5 ~) j, @5 u
. {9 D/ @1 O4 o( b& @3 A0 @5 O1 l# M, ^
* s1 s" i' U) e# r, J- C# X* {1 n
, ?3 d0 I% ^8 @- ^$ i& ~0 R
2 V, ?; o' o9 R3 _
Figure 1. No-load test simulation circuit; U8 Y7 r% k( t" S- b" n
% k/ I; Z3 @3 b5 X& n" D2 r
8 v4 f* K1 [8 f- B" M
% n- I# P8 a R! y0 BFigure 2. The default setting of the 1-phase 2-winding UMEC transformer
- H3 H# l3 B6 P& v3 N8 N% r% {3 a; t- T4 O" L
& o5 L6 q2 H, x
Tabel 1. The comperation of measured value and set value of saturation curve
! y! @( o$ `. O* X% {, ]; u| Voltage(kV) | Set Value(A) | Measured Value(A) | | 0 | 0 | 0 | | 74.54967 | 0.771304348 | 0.544998 | | 140.9532 | 2.12016087 | 1.17589 | | 189.77714 | 4.264591304 | 1.83184 | | 230 | 8.695652174 | 2.61655 | | 248.4552 | 13.4583913 | 3.09144 | | 269.8682 | 28.36295652 | 3.67383 | | 290.0645 | 88.50869565 | 4.58593 | | 313.0162 | 261.8043478 | 5.91406 | | 343.7787 | 540.8173913 | 8.46123 |
- k! i$ G" T b c( P
! C5 b; y. S: f! g
, q- n: k2 m) H, Y8 u
" G9 |# a1 \* X2 z6 M* ~
9 ^1 f5 i3 ~& A: m
Figure 3. The comperation of measured value and set value of saturation curve! a" n& I7 B7 Z
0 f: ^( e, V; g9 p3 f! O9 m8 Z. h+ x/ T; u1 K$ T0 |
?1 S1 T$ M' L" y1 v7 U1 e: R
4 k* P# q! _- m9 o) v3 L
I wish I have discribed the question clearly, and look forward to your feedback.
; C$ F% z/ n- [, o4 j. W
0 y2 L( O* _" ^! }- L4 U# T8 _# r% B+ k+ X# `# Q+ X7 A
0 c9 H2 Z) B$ h! w
Best regards E, y5 n5 k6 O7 ~
I" @1 I; w$ H6 s- u
" ?! t: s6 J+ C1 z+ {
8 j& C5 w. I# E# L5 b/ PYours,! l4 g) y; C% d0 c6 k2 M
; o5 w: y' C$ z! G8 L* y- q2 {2 m [- k7 v ]
) `3 l+ l" E/ U( H, I2 u, W9 pXie Qijia
2 u0 m* T8 R; n/ {- UEmail: xeqja@163.com7 R* R' l% Z8 d# ?6 z0 u* _# W# O
% \* m! u+ }# I0 i8 w4 Q; e- ^3 }
$ x( P2 p2 Z3 S4 }$ T
# C& P- A/ z" j
% d$ a! K, J' i问题全文: R# e3 X1 k" m0 ], f1 e1 k! c1 B5 N
UMEC问题.rar
(253.07 KB, 下载次数: 0)
|
|
赣公网安备36040302000210号 )|网站地图
狗仔卡
显身卡
