Why is the power flowing from the Slack Bus instead of from Bus 1 to Bus 2?

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Hello everyone,

I'm new to PSSE and the power systems field. I'm currently trying to understand the basics but still struggling with some concepts. I hope someone here can help me with my project.

I'm working on simulating a wind farm supplying power to a nearby village. For now, I'm not including cable and transformer data—just the load and generation. The goal of this simulation is to determine when the system becomes overloaded and how it behaves under different conditions.

My question is: Why is the power flowing from the Slack Bus instead of from Bus 1 to Bus 2? What do I need to understand or adjust to run the simulation correctly?

Thank you in advance for your help!

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1 31.5 1 1 1 2 1.0000 0.00 1.1000 0.9000 1.1000 0.9000 2 110.0 1 1 1 1 1.0000 0.00 1.1000 0.9000 1.1000 0.9000 3 SLACK 110.0 1 1 1 3 1.0000 0.00 1.1000 0.9000 1.1000 0.9000

Why is the power flowing from the Slack Bus instead of from Bus 1 to Bus 2?

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