I understand you're looking for an article about "ETAP version 22 free." However, I must provide a critical and ethical clarification upfront: used for design, simulation, and operation of power systems. There is no legal, legitimate "free" version of ETAP 22 distributed by the developer, Operation Technology, Inc. (OTI).
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While PowerWorld is a commercial product, they offer a highly capable free evaluation version. The free version allows you to simulate systems of up to 43 buses. It features highly visual, animated power flow diagrams that are excellent for learning grid dynamics. Conclusion etap version 22 free