alenyoung 发表于 2010-12-20 12:19:51

我也在搞双馈风机的仿真。可以交流。

yizhangsjtu 发表于 2010-12-21 02:58:35

回复 1# rosickywang


    The DFIG simulation case is posted on the website of pscad.com. What is your problem on it. That case works pretty good.
The only thing not perfect is the loss of the bridge, which in most case people don't care that much.

The theory of DFIG is also open to public. You can reference the paper of Pena on IEE.

A 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.

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.

Good luck.

rosickywang 发表于 2010-12-21 15:44:14

回复 12# yizhangsjtu


   
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 ，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。
2.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 发表于 2010-12-22 04:38:21

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

1. Yes, many of the parameters in control are derived from the machine parameters. Those control constants is not arbitrary chosen, but by calculation.

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.

Those 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 发表于 2010-12-22 10:32:55

回复 14# yizhangsjtu


   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 发表于 2010-12-22 11:42:55

谢谢你的资料

renben2 发表于 2011-6-3 17:00:05

我也帮你顶一顶！

face4 发表于 2011-6-27 11:23:04

回复 12# yizhangsjtu


    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 发表于 2011-6-27 14:44:54

回复 3# norika


    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；
曲线漂浮绕大弯，比例度盘往小扳；
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；
曲线振荡频率快，先把微分降下来；
动差大来波动慢，微分时间应加长；
理想曲线两个波，前高后低4比1。
希望有用！！！！

face4 发表于 2011-11-2 09:37:53

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。
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查看完整版本: 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！

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