用PSCAD仿真双馈风力发电大半年了都没有满意结果，实在没办法，现寻有偿指导！

alenyoung

我也在搞双馈风机的仿真。可以交流。

yizhangsjtu

回复 1# rosickywang
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    The DFIG simulation case is posted on the website of pscad.com. What is your problem on it. That case works pretty good.
" `; E/ N/ V& _' V+ ~( \# V3 YThe only thing not perfect is the loss of the bridge, which in most case people don't care that much.
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9 s1 P. L1 S1 ]The theory of DFIG is also open to public. You can reference the paper of Pena on IEE.

0 b: a1 B# f$ nA difference of the PSCAD sample case and the paper is the CPWM (not PWM) is used on rotor site converter control. This simplified the control, but still works well.

6 K+ X! g. j; t2 ^You should have a case and read the paper. If you still have trouble, see and your teacher. It is not very good to hang up there for 6 month.
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Good luck.

rosickywang

回复 12# yizhangsjtu
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- G# B1 X; }9 u  Z, b你好，谢谢你的帮助。对于你说的几点，我的理解如下：1.The DFIG simulation case is posted on the website of pscad.com. What is your problem on it. That case works pretty good.以前官网中那个模型电机容量是500 [MVA]，很多参数都不满足需要，所以我想修改下，然后就涉及到一些参数选择和计算问题。最新的模型，很多波形的效果都不是很好。
' E  g; [5 Y. v" T* n4 b9 I2 J  Y9 r2.The theory of DFIG is also open to public. You can reference the paper of Pena on IEEE。很多参考文献中，转子侧的控制都是采用的间接电流控制，即通过电压去控制转子电流。而官网中的模型采用的是直接电流控制。所以我一直是在这个模型的基础上，去改转子侧变流器的控制策略，结果不理想。
我想请问你是如何考虑上面提到的这两点问题的：即参数的修改和控制策略的改变。

yizhangsjtu

回复 13# rosickywang
I can see you are doing real work. The two points you proposed are the core problem for this case.

; K5 W# X7 s5 o1 p3 d1. Yes, many of the parameters in control are derived from the machine parameters. Those control constants is not arbitrary chosen, but by calculation.
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2. As I mentioned in the previous message, the CPWM is used in the sample case. This treatment avoided a very hard part of the control-how to decouple the rotor side converter control. Personally I don't like this simplification very much. But it seems work fine.
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+ f. K5 K$ O' g1 dThose are not simple questions that can be explained here. Please let me know which university you are, let me see if I can find someone to help you locally.

dywedywe

回复 14# yizhangsjtu
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   您好，我是华北电力大学的，是否可以也顺便指导我一下，我的方向是功率控制（direct power control)

redplum

谢谢你的资料

renben2

我也帮你顶一顶！

face4

回复 12# yizhangsjtu
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- h* h0 i- G  ]8 V) F( `8 E' ~* w    请问一下，为什么论坛中的其他例子我可以下载，DFIG的例子却下载不了呢？这个资源已经不在了？

hhp358765804

回复 3# norika

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5 H8 X0 F, V, J! s    PI参数调节常用口诀：
参数调整找最佳，从小到大顺序查；
先是比例后积分，最后再把微分加；
曲线振荡很频繁，比例度盘要放大；
* t% }) _1 p, l' z7 P0 z曲线漂浮绕大弯，比例度盘往小扳；
6 w6 {/ o* q. ~! j. d4 ^曲线偏离回复慢，积分时间往下降；
曲线波动周期长，积分时间再加长；
8 R& r. K) Q  X0 y曲线振荡频率快，先把微分降下来；
5 d* V0 A$ u( a8 q! Z( \动差大来波动慢，微分时间应加长；
9 k6 h' ~* |# @- \理想曲线两个波，前高后低4比1。
希望有用！！！！

face4

请问，PI调节的时候不是应该先单端调完再调双端吗，那么在双馈电机里，这个该怎么调呢？谢谢。