PSCAD仿真过程是不是会出现失稳的现象

cleverwood

我在最近的仿真中发现有些观测量，比如电流，在开始的时候波形很平稳，过了几秒后，随着时间的增加电流逐渐增大，我用的是ＰＳＣＡＤ中的ＵＭＥＣ变压器模型，请问这样是不是因为数值仿真失稳了造成这样的结果-%-67787-%--%-68863-%--%-67504-%-

yizhangsjtu

This is not unstable of the circuits. It is numerical instability.
In other words, the simulation is wrong.
7 ]2 D# W& J+ aLikely you might can fix the case by the following tips:
1. turn on chatter removal
2. Turn on interpolation
3. Add some loss to UMEC transformer (like 1%)

xuyufufzu

太厉害的了的啊，版主，不知道版主都研究些什么

yizhangsjtu

云游天下，四海为家。。。

sagittarius

感觉像是模型的问题

yizhangsjtu

The problem is not modelling, but implementation here.
There is kind of numerical problem of trapezoidal format for nonlinear model and switching device.

zhoushaoxing

无图无真相。