TY JOUR TI Analysis and ways to improve the efficiency of the planning system of PJSC Rosseti Severny Kavkaz KW planning system KW PJSC Rosseti Severny Kavkaz KW planning efficiency KW electric grid company KW investment program KW plan-fact analysis KW electricity losses KW business plan KW financial planning KW and strategic development JO Journal of Applied Research AU Kurbanova, U.A. AU Salmanov, H.H. PY 2026 IS 0 PB ITBO University