Is the abc_to_dq0 Transformation correctly defined in SimPowerSystems?
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In the abc_to_dq0 Transformation block, the direct axis value is obtained from a scaled combination of the sin values of the phase variable. And q from a scaled combination of cos values.
In other definitions (Wikipedia, Mohan), the d axis is obtained from a scaled combination of cosines and the q from a scaled combination of -sines. Also Park's definition uses this.
Is this Matlab definition a mistake, which references itself as the Park transformation, but it's not? Could someone please confirm this or show me where I could find more information on this if it is correct.
Thanks in advance.
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Joel Van Sickel
2020 年 12 月 11 日
It is correct, howerver, there are mutliple standards for reference frames which can cause confusion. (such as a 90 degree offset for some)
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Joel Van Sickel
2020 年 12 月 11 日
Actually, we've started giving options to change the assumptions to support different standards.
The current block allows it to be poewr invariant and choose the axis alignment: https://www.mathworks.com/help/physmod/sps/ref/parktransform.html
Previously, this has caused issues for a number of people since the assumptions were not clear or consistent in our products, so we are working to address that.
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