Complex signal mismatch in three phase OLTC in simulink

I have made Kundur 10 bus system model in simulink and one of its component is three phase OLTC regulting transformer. While running the simulation, i get the following error:

Complex signal mismatch. Output port 1 of 'kundur_10bus_basic/Three-Phase OLTC Regulating Transformer (Phasor Type)/Current Sources/I1_abc' is a signal of numeric type complex. However, it is driving a signal of numeric type real

Component:Simulink | Category:Modelerror

Complex signal mismatch. Input port 1 of 'kundur_10bus_basic/Three-Phase OLTC Regulating Transformer (Phasor Type)/Current Sources/Gain4' expects a signal of numeric type real. However, it is driven by a signal of numeric type complex

Component:Simulink | Category:Modelerror

I have attached the file here. Is there any solution ?

[Asi angel]

did you solve it ?

Answer 1

[Pratyush]

Hi Shruheti,

To resolve the complex signal mismatch error in your Simulink model, follow these steps:

• Locate the block ("I1_abc") outputting a complex signal and ensure subsequent blocks can handle it.
• Verify that all blocks between "I1_abc" and "Gain4" can process complex signals.
• Use a `Complex to Real-Imag` block to separate complex signals if "Gain4" expects real signals.
• Ensure "Gain4" and other blocks are configured to handle complex signals if necessary.
• Make sure all blocks in the signal path are compatible with complex data types.
• Create a small test model to isolate and understand the issue.
• Ensure you have the latest version of Simulink.

These steps should help resolve the error.