TY - JOUR AU - Hassani Ahangar, A. AU - Nafisi, H. AU - Karami, H. AU - Gharehpetian, G. TI - Overcurrent Relay Coordination Using Improved Hyper-Spherical Search Algorithm Considering Different Relay Characteristics and Pickup Current JO - Nashriyyah -i Muhandisi -i Barq va Muhandisi -i Kampyutar -i Iran VL - 16 IS - 3 SP - 187 EP - 195 PY - 2019 DO - ER -