# Why i have different waveforms between two systems?

**URL:** <https://forum.plexim.com/t/why-i-have-different-waveforms-between-two-systems/1074>\
**Category:** PLECS\
**Tags:** transformer, thyristors\
**Created:** [November 3, 2021, 11:02pm UTC](https://forum.plexim.com/t/why-i-have-different-waveforms-between-two-systems/1074 "2021-11-03T23:02:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Alberto\_Rehbein](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@Alberto\_Rehbein](https://forum.plexim.com/u/Alberto_Rehbein)\
**Post date:** [November 3, 2021, 11:02pm UTC](https://forum.plexim.com/t/why-i-have-different-waveforms-between-two-systems/1074/1 "2021-11-03T23:02:14Z")

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hello, i have a rectifier with certain conditions and i got this current waveform as DC current

 ![312](https://europe1.discourse-cdn.com/flex006/uploads/plecs/original/1X/2e7ff2752aed5a4217a010252c1a95d7bba0eb23.jpeg)

Then i build a system transmission simulation using the same conditions that rectifier had, but applied to rectifier and inverter (same firing angle), and i have this waveform for the same current

 ![312](https://europe1.discourse-cdn.com/flex006/uploads/plecs/original/1X/6beaa4e5d2db77339e47a592a32d9f880fecbbb4.jpeg)

I attach both simulations.

[Transmission-system-LCC.plecs](https://forum.plexim.com/uploads/short-url/rB6Ev5bn6QJao0WEGM2DQO2xTY2.plecs) (54.8 KB)

[12-pulse-rectifier-bl.plecs](https://forum.plexim.com/uploads/short-url/zKWM1DNMGXkyVURcXpkjU5ZiAj0.plecs) (100 KB)