New line voltage stability index (BVSI) for voltage stability assessment in power system: the comparative studies by Ismail, Bazilah, Abdul Wahab, Noor Izzri, Othman, Mohammad Lutfi, Mohd Radzi, Mohd Amran, Vijayakumar, Kanendra Naidu, Rahmat, Mohd Khairil, Mat Naain, Muhammad Najwan