# Voltage Source Average Model

**URL:** <https://forum.plexim.com/t/voltage-source-average-model/2291>\
**Category:** PLECS\
**Tags:** plecs, simulink, inverter\
**Created:** [June 25, 2025, 2:50pm UTC](https://forum.plexim.com/t/voltage-source-average-model/2291 "2025-06-25T14:50:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Lukman\_SN](https://avatars.discourse-cdn.com/v4/letter/l/82dd89/32.png) [@Lukman\_SN](https://forum.plexim.com/u/Lukman_SN)\
**Post date:** [June 25, 2025, 2:50pm UTC](https://forum.plexim.com/t/voltage-source-average-model/2291/1 "2025-06-25T14:50:23Z")

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Hello, I am currently designing inverter that connect with grid. I need to convert the Vdc to Vac in abc frame with control signal in Uref in abc frame. However, i don’t want to use the PWM to control the inverter so i just want to use Voltage source converter average model to convert the Vdc without PWM. I can find this Voltage source converter average model in MATLAB/SIMULINK as an universal bridge block but I cannot find that voltage source converter average model in PLECS as a block like in MATLAB/SIMULINK. So, Is there any reference in block diagrams or block library in PLECS that have a same models with Voltage source converter average model in SIMULINK?

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**Author:** ![Bryan\_Lieblick](https://dub1.discourse-cdn.com/flex006/user_avatar/forum.plexim.com/bryan_lieblick/32/10_2.png) [@Bryan\_Lieblick](https://forum.plexim.com/u/Bryan_Lieblick)\
**Post date:** [June 26, 2025, 5:15pm UTC](https://forum.plexim.com/t/voltage-source-average-model/2291/2 "2025-06-26T17:15:29Z")

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There is not a library block for an average two-level VSI model in the PLECS library, although it can be constructed in a straightforward manner from basic library components. There are a few examples of average models in the PLECS demo model library.

See the “Inverter” subsystems in the “Microgrid in Island Operation” demo model for one implementation, as shown below.

 ![image](https://europe1.discourse-cdn.com/flex006/uploads/plecs/original/2X/a/a66e73343b9558aff53cb1f34162c8b447a2a398.png)

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<div class="post-metadata">

**Author:** ![Lukman\_SN](https://avatars.discourse-cdn.com/v4/letter/l/82dd89/32.png) [@Lukman\_SN](https://forum.plexim.com/u/Lukman_SN)\
**Post date:** [June 28, 2025, 9:15am UTC](https://forum.plexim.com/t/voltage-source-average-model/2291/3 "2025-06-28T09:15:13Z")

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Thank you in advance for answers. It helps me a lot