|
|
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 1 p; v1 i! C. E- d1 U Y
2 S' h2 k" g3 S% B' `& n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：
* A1 w7 A" c' f' m0 R9 H- T6 X
! t% k( [8 \9 _1 d请教大侠们，我在做pscad变压器仿真时遇到一个问题很不懂：
) C ?6 [* r/ o% I$ b1 G
1 e* p4 Y, h" a2 m& }5 ?5 Vumec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！
( }2 e' {! U' a" T7 C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!
$ o) i% s! R2 ?8 p) p+ K- Y原文链接：https://tech.cepsc.com/thread-87732-1-1.html# C. X' W" v& | S3 C
, c+ m& O1 e; E
问题原文Dear Sir/Madam:7 ~: k4 {8 ~" Z0 E
8 x) |, B' n7 j9 A# r g
" `9 Y% b4 y, G! c5 f! Q- j& _# b7 d2 l% z, P+ T4 J+ D
I'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.
* I. S* x& m" \* b0 R _5 O$ }5 k# p0 t
0 f) c6 H. Z# R; h" f% [
, F) [6 H' O& b, j8 q4 B4 u" W1 ?( sThe 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?: |/ `$ U+ [( C& ?/ |
+ i* u! _ w, d# ^) a2 H
! F. w. W% g5 Y' T* q- {1 c
) Y3 H2 T8 \, v8 s! d- M
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.
6 f; [4 Q6 y+ p s8 m- H
# P. A. n. n# L+ C" c2 \& z8 AThe 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. ) u* D H: Z% A- V, a" b0 D% w
6 C) e6 l: R p! ?. u- ^
0 f1 U4 S3 T8 N( n$ q
; O2 t7 s! Q- P! o" f, d/ c
7 d" c9 d4 d5 F1 ]7 w0 Z$ |' ?
/ J% \1 |1 A1 e4 _
Figure 1. No-load test simulation circuit
. I9 h/ \; F: W
7 P1 c) |: C' u1 k# P$ U6 }6 \
4 v" {( A9 s1 x, Z2 @7 \/ w0 p
" v( n M k+ l1 k9 U5 o5 fFigure 2. The default setting of the 1-phase 2-winding UMEC transformer
- d1 J3 o& {; q# {% X: [: [+ o; h, |& o7 ?+ T
8 n8 w5 V! U8 c7 F' t, e b
Tabel 1. The comperation of measured value and set value of saturation curve
* Y8 E3 }) R; G% h; S5 Z1 z| 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 |
- Z' f% {7 F4 ?5 M6 ?; ~1 k( g
+ ~( [1 [* t2 Q- g* k8 d* ?0 q8 B; M
! J8 Q( X% ]8 G0 o3 D i* D
# G/ S3 k9 `7 ]6 q2 O8 T
p: r5 x! F6 I6 e; I
Figure 3. The comperation of measured value and set value of saturation curve
9 S, ^% O0 d4 f; J; Y: q+ P
y# W, S" p, a. ?' X1 ~( Z
; ^" }& N* S, a1 U! r/ p- \
) C$ g* \5 m, m* C& R' S
( I* ~: t+ ]' d0 F2 }! N) ^I wish I have discribed the question clearly, and look forward to your feedback.' t- |: Z2 J* F u6 ]. W
4 d Z( E% ~ C
" o% [4 q4 z! \, h9 }" Z- }6 x
+ D E# U- S. x( s4 B+ D- g/ @; a) UBest regards
) L+ d; v9 n m6 I+ I$ o8 W2 ?
* Z4 ^+ Z" A) K, @# T x; z& e7 i' U% O5 _- A
# x- B$ v8 [0 t, h& r S8 z1 GYours,
5 O% }- L& I) X0 R
3 S' g' `( `( v+ N9 L0 H
+ i* e; v0 B4 T; D+ Z: s7 j$ @; |( f1 I# D3 N5 Y: ?( a
Xie Qijia
; d, J I0 K: _Email: xeqja@163.com( x9 _0 c4 E7 t) a2 z
7 E4 e8 H. K5 V: z9 i" k. r6 c+ c0 @5 I) C" _( t6 U; o; A
( F7 c3 @$ E1 l9 a# v. Y/ K7 T5 ?$ u* }( V
问题全文
! K& q7 B. t" L2 c, Z
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
