How can I connect a Simulink wind-generator subsystem to the Simscape Electrical IEEE-39 Bus example? (Simulink-PS Converter + Controlled Voltage Source still won’t connect)

I’m trying to replace one synchronous generator in MathWorks’ IEEE-39 Bus System (Simscape Electrical Specialized Power Systems, i.e., the blue-line network with powergui) with a simple wind-generator subsystem that I built in Simulink.

What I tried

• Inside the wind subsystem I produce 3-phase voltages/currents (abc).
• I used Three-Phase V-I Measurement to get Vabc/Iabc, then Simulink-PS Converter + Controlled Voltage Source to drive the network.
• I attempted to connect that controlled source to the generator connection port (ConnGen10) / bus block at the corresponding bus (e.g., Bus30) in the 39-bus model.

Issues / errors

• I get “Connection … is invalid because the ports are not compatible” when wiring my controlled source to the bus.
• In other trials I hit a “Solver Configuration … block is in an algebraic loop” error.
• Visually, my source has Simscape Foundation electrical conserving ports, while the IEEE-39 model uses Specialized Power Systems blue connectors and single “group” three-phase ports on generator subsystems.

What I’m trying to achieve

• Replace one generator (e.g., Gen10@Bus30) with a wind source and run the standard 39-bus contingency/fault studies—keeping the rest of the example unchanged.
• I’m happy to generate three-phase voltage/current from Simulink or from Simscape blocks; I just need the correct interface into the SPS network.

Questions

1. What is the correct interface block/approach to inject a 3-phase source into the Specialized Power Systems bus from a Simulink/Simscape subsystem?

• Do I need the Specialized Power Systems → Controlled Three-Phase Voltage Source (blue connectors) instead of the Foundation Controlled Voltage Source?
• Or should I use one of the Simscape–SPS interface blocks (Current/Voltage Simscape Interface)?

1. Is it possible to connect directly to the single blue “group” port (ConnGen##) used in the example generator subsystems, or should I expose explicit A-B-C ports and connect there?
2. Any guidance on avoiding the algebraic-loop error when inserting the interface?

Environment

• Simulink / Simscape Electrical (Specialized Power Systems).
• Power system runs with powergui (Continuous).
• (Release: please see “Release” field.)

I’ve attached screenshots of the generator subsystem, my wind subsystem, and the failing connection. A minimal model that reproduces the error is available if needed.

Thanks in advance for pointing me to the right interface and block set to make this connection work.

Answer 1

[Sabin]

It is not possible to directly connect blocks from the two technologies. Mixing two different technologies the solver may run into difficulties. Since R2024b, IEEE 39-Bus System example is available in Simscape Electrical and can be used as a starting point.

https://www.mathworks.com/help/sps/ug/ieee-39-bus-system.html