JPS_V5_N1_RP1 Almoataz Y. Abdelaziz Metwally A. El-Sharkawy Mahmoud A. Attia Journal on Power Systems Engineering 2322–0376 5 1 1 9 Wind Power, Flexible AC Transmission Systems, Power System Analysis Computing Wind generation penetration maximizing is an important issue in power systems. These increasing in wind penetration may badly affect the power system stability. In this paper, Thyristor-Controlled Series Compensation (TCSCs) devices are used to help wind penetration maximizing and also for studying the effect of system topology in that. Cases studied are carried out on modified IEEE 39 bus system with variable speed wind generator penetration increases by 50%, 100%, 150% and 170%. In each case of wind penetration increases, three cases in the system are tried, system without change, system with reduction of the impedance of the lines connected to wind generator by 50%, and change the location of wind generator to another location has more interconnection. Another case study is carried out on modified IEEE 39 bus system with fixed speed wind generator penetration increases by 50%, 100% and 150% respective of its generation. The system suffers from some violation in its parameters. Results found that series TCSCs devices in certain range are able to maximize wind penetration in power systems without violation in its indices. February – April 2017 Copyright © 2017 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=13532