Mehrdad Mahmudizad and Roya Ahmadi Ahangar, Improving Load Frequency Control of Multi-Area Power System by Considering Uncertainty by Using Optimized Type 2 Fuzzy Pid Controller with the Harmony Search Algorithm. journal = {International Journal of Electrical and Information Engineering}, [online]. World Academy of Science, Engineering and Technology. July 2016, vol. 116(8). 1099 - 1109 [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10005294.