After a thorough search across academic databases, engineering forums, and digital repositories (including platforms like Academia.edu, Scribd, GitHub, and specialized Spanish-language engineering sites), here is the current and useful report on its availability. The official, complete, and free "solucionario" for Maulio Rodriguez's Sistema de Potencias is not publicly and legally available for free download. Most links claiming to offer it are either fake, lead to malware, require paid subscriptions with no guarantee of the actual file, or are partial (only the first few chapters in low quality).
| Topic in Rodriguez | Equivalent in Grainger & Stevenson (Ch) | Equivalent in Glover, Sarma (Ch) | |-------------------|-------------------------------------------|------------------------------------| | Per-unit system | Ch 2 | Ch 3 | | Transmission line parameters | Ch 4 | Ch 4 | | Power flow (Newton-Raphson) | Ch 6 | Ch 6 | | Symmetrical faults | Ch 7 | Ch 7 | | Unsymmetrical faults | Ch 8, 9 | Ch 8, 9 | | Stability | Ch 11 | Ch 11 | maulio rodriguez solucionario sistema de potencias