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发表于 2013-3-12 16:16:30
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本帖最后由 xeqja 于 2013-3-12 16:25 编辑 5 ?( F1 Y! X( M- e
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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：
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请教大侠们，我在做pscad变压器仿真时遇到一个问题很不懂：
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+ m' m4 C0 v. ?( |% ]; Numec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！
+ ~6 e* P$ l! d# ^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!
! L1 {6 Y! `% t0 U* }% h原文链接：https://tech.cepsc.com/thread-87732-1-1.html+ j; r9 N: U7 v3 n" P
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问题原文Dear Sir/Madam:& Q0 U6 }* M7 \8 ~, L& o/ V
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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.$ Z: D" s. Q' ?6 Z: g
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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?6 X; `/ b8 H& _3 I& r, y2 L
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* C m) O9 c' `: wFor 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. , l, x0 f: @3 i6 i* N6 S& M( q' A
6 h5 f8 a5 g* n$ FThe 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.
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Figure 1. No-load test simulation circuit) n3 p1 @, f" ]
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Figure 2. The default setting of the 1-phase 2-winding UMEC transformer- O7 b) }% V6 d' c+ E# h
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Tabel 1. The comperation of measured value and set value of saturation curve0 ]# F, m0 C( ~( h r& h9 z6 _
| 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 |
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Figure 3. The comperation of measured value and set value of saturation curve
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) f2 l2 t: P, A' N$ ?/ EI wish I have discribed the question clearly, and look forward to your feedback.
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Best regards
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, \0 W k" }, qYours,
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Email: xeqja@163.com8 n- a2 x9 Z1 j- ]$ c
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问题全文8 ~8 u2 b8 e; R8 }4 m2 h
UMEC问题.rar
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