List of Articles Power system Open Access Article Abstract Page Full-Text 1 - Design of Multi-Stage Fuzzy PID Bundled Artificial Bee Colony for Multi-machine PSS Nasser yousefi Open Access Article Abstract Page Full-Text 2 - Robust Control of Power System Stabilizer Using World Cup Optimization Algorithm Ali Madadi Navid Razmjooy Mehdi Ramezani Open Access Article Abstract Page Full-Text 3 - Studying Impact of Unified Power Flow Controller on improve transient stability by Improved Harmony Search Algorithm Mehdi Nafar Mostafa Abbasi Mojtaba Abbasi Open Access Article Abstract Page Full-Text 4 - Improvement of Power System Condition by Placement of Flexible Alternating Current Transmission Systems devices Mehdi Nafar Mojtaba Abbasi Mostafa Abbasi